Mercurial Hosting > luan
annotate src/luan/impl/LuanParser.java @ 166:4eaee12f6c65
move luan/interp to impl
git-svn-id: https://luan-java.googlecode.com/svn/trunk@167 21e917c8-12df-6dd8-5cb6-c86387c605b9
author | fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9> |
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date | Sun, 22 Jun 2014 04:17:38 +0000 |
parents | src/luan/interp/LuanParser.java@94bbc4cbc106 |
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166
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1 package luan.impl; |
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2 |
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3 import java.util.Set; |
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4 import java.util.HashSet; |
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5 import java.util.Arrays; |
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6 import java.util.List; |
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7 import java.util.ArrayList; |
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8 import java.util.Scanner; |
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9 import luan.Luan; |
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10 import luan.LuanState; |
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11 import luan.LuanSource; |
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12 |
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13 |
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14 final class LuanParser { |
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15 |
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16 private static final class Frame { |
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17 final Frame parent; |
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18 final List<String> symbols = new ArrayList<String>(); |
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19 int stackSize = 0; |
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20 int loops = 0; |
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21 boolean isVarArg = false; |
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22 final List<String> upValueSymbols = new ArrayList<String>(); |
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23 final List<UpValue.Getter> upValueGetters = new ArrayList<UpValue.Getter>(); |
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24 |
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25 Frame(UpValue.Getter envGetter) { |
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26 this.parent = null; |
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27 upValueSymbols.add(_ENV); |
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28 upValueGetters.add(envGetter); |
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29 } |
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30 |
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31 Frame(Frame parent) { |
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32 this.parent = parent; |
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33 if( upValueIndex(_ENV) != 0 ) |
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34 throw new RuntimeException(); |
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35 } |
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36 |
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37 int stackIndex(String name) { |
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38 int i = symbols.size(); |
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39 while( --i >= 0 ) { |
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40 if( symbols.get(i).equals(name) ) |
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41 return i; |
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42 } |
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43 return -1; |
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44 } |
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45 |
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46 int upValueIndex(String name) { |
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47 int i = upValueSymbols.size(); |
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48 while( --i >= 0 ) { |
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49 if( upValueSymbols.get(i).equals(name) ) |
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50 return i; |
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51 } |
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52 if( parent==null ) |
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53 return -1; |
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54 i = parent.stackIndex(name); |
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55 if( i != -1 ) { |
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56 upValueGetters.add(new UpValue.StackGetter(i)); |
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57 } else { |
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58 i = parent.upValueIndex(name); |
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59 if( i == -1 ) |
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60 return -1; |
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61 upValueGetters.add(new UpValue.NestedGetter(i)); |
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62 } |
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63 upValueSymbols.add(name); |
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64 return upValueSymbols.size() - 1; |
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65 } |
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66 |
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67 void addUpValueGetter(String name,UpValue.Getter upValueGetter) { |
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68 upValueSymbols.add(name); |
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69 upValueGetters.add(upValueGetter); |
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70 } |
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71 } |
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72 |
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73 private static class In { |
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74 static final In NOTHING = new In(false,false); |
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75 |
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76 final boolean parens; |
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77 final boolean template; |
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78 |
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79 private In(boolean parens,boolean template) { |
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80 this.parens = parens; |
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81 this.template = template; |
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82 } |
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83 |
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84 In parens() { |
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85 return parens ? this : new In(true,template); |
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86 } |
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87 |
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88 In template() { |
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89 return template ? this : new In(parens,true); |
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90 } |
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91 } |
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92 |
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93 private static final String _ENV = "_ENV"; |
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94 private static final UpValue.Getter[] NO_UP_VALUE_GETTERS = new UpValue.Getter[0]; |
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95 |
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96 final LuanSource source; |
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97 private Frame frame; |
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98 private final Parser parser; |
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99 private final boolean interactive; |
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100 |
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101 LuanParser(LuanSource source,UpValue.Getter envGetter) { |
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102 this.source = source; |
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103 this.frame = new Frame(envGetter); |
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104 this.parser = new Parser(source); |
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105 this.interactive = envGetter instanceof UpValue.ValueGetter; |
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106 } |
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107 |
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108 void addVar(String name,Object value) { |
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109 frame.addUpValueGetter(name,new UpValue.ValueGetter(value)); |
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110 } |
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111 |
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112 private LuanSource.Element se(int start) { |
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113 return new LuanSource.Element(source,start,parser.currentIndex()); |
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114 } |
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115 |
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116 private List<String> symbols() { |
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117 return frame.symbols; |
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118 } |
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119 |
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120 private int symbolsSize() { |
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121 return frame.symbols.size(); |
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122 } |
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123 |
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124 private void addSymbol(String name) { |
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125 frame.symbols.add(name); |
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126 if( frame.stackSize < symbolsSize() ) |
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127 frame.stackSize = symbolsSize(); |
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128 } |
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129 |
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130 private void addSymbols(List<String> names) { |
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131 frame.symbols.addAll(names); |
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132 if( frame.stackSize < symbolsSize() ) |
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133 frame.stackSize = symbolsSize(); |
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134 } |
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135 |
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136 private int stackIndex(String name) { |
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137 return frame.stackIndex(name); |
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138 } |
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139 |
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140 private void popSymbols(int n) { |
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141 List<String> symbols = frame.symbols; |
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142 while( n-- > 0 ) { |
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143 symbols.remove(symbols.size()-1); |
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144 } |
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145 } |
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146 |
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147 private int upValueIndex(String name) { |
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148 return frame.upValueIndex(name); |
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149 } |
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150 |
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151 private void incLoops() { |
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152 frame.loops++; |
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153 } |
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154 |
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155 private void decLoops() { |
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156 frame.loops--; |
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157 } |
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158 |
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159 private <T> T required(T t) throws ParseException { |
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160 if( t==null ) |
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161 throw parser.exception(); |
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162 return t; |
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163 } |
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164 |
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165 private <T> T required(T t,String msg) throws ParseException { |
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166 if( t==null ) |
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167 throw parser.exception(msg); |
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168 return t; |
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169 } |
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170 |
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171 private static Expr expr(Expressions exprs) { |
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172 if( exprs instanceof Expr ) |
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173 return (Expr)exprs; |
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174 return new ExpressionsExpr(exprs); |
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175 } |
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176 |
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177 private FnDef newFnDef(int start,Stmt stmt) { |
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178 return new FnDef( se(start), stmt, frame.stackSize, symbolsSize(), frame.isVarArg, frame.upValueGetters.toArray(NO_UP_VALUE_GETTERS) ); |
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179 } |
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180 |
158
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181 FnDef Expression() throws ParseException { |
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182 Spaces(In.NOTHING); |
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183 int start = parser.begin(); |
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184 Expressions expr = Expr(In.NOTHING); |
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185 if( expr != null && parser.endOfInput() ) { |
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186 Stmt stmt = new ReturnStmt( se(start), expr ); |
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187 return parser.success(newFnDef(start,stmt)); |
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188 } |
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189 return parser.failure(null); |
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190 } |
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191 |
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192 FnDef RequiredModule() throws ParseException { |
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193 Spaces(In.NOTHING); |
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194 int start = parser.begin(); |
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195 frame.isVarArg = true; |
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196 Stmt stmt = RequiredBlock(); |
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197 if( parser.endOfInput() ) |
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198 return parser.success(newFnDef(start,stmt)); |
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199 throw parser.exception(); |
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200 } |
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201 |
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202 private Stmt RequiredBlock() throws ParseException { |
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203 List<Stmt> stmts = new ArrayList<Stmt>(); |
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204 int stackStart = symbolsSize(); |
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205 Stmt(stmts); |
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206 while( StmtSep(stmts) ) { |
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207 Spaces(In.NOTHING); |
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208 Stmt(stmts); |
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209 } |
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210 int stackEnd = symbolsSize(); |
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211 popSymbols( stackEnd - stackStart ); |
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212 if( stmts.isEmpty() ) |
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213 return Stmt.EMPTY; |
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214 if( stmts.size()==1 && stackStart==stackEnd ) |
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215 return stmts.get(0); |
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216 return new Block( stmts.toArray(new Stmt[0]), stackStart, stackEnd ); |
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217 } |
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218 |
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219 private boolean StmtSep(List<Stmt> stmts) throws ParseException { |
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220 parser.begin(); |
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221 if( parser.match( ';' ) ) |
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222 return parser.success(); |
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223 if( parser.match( "--" ) ) { |
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224 while( parser.noneOf("\r\n") ); |
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225 } |
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226 if( EndOfLine() ) |
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227 return parser.success(); |
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228 parser.rollback(); |
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229 Stmt stmt = TemplateStmt(); |
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230 if( stmt != null ) { |
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231 stmts.add(stmt); |
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232 return parser.success(); |
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233 } |
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234 return parser.failure(); |
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235 } |
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236 |
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237 private boolean EndOfLine() { |
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238 return parser.match( "\r\n" ) || parser.match( '\r' ) || parser.match( '\n' ); |
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239 } |
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240 |
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241 private void Stmt(List<Stmt> stmts) throws ParseException { |
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242 if( LocalStmt(stmts) ) |
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243 return; |
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244 Stmt stmt; |
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245 if( (stmt=ReturnStmt()) != null |
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246 || (stmt=FunctionStmt()) != null |
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247 || (stmt=LocalFunctionStmt()) != null |
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248 || (stmt=ImportStmt()) != null |
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249 || (stmt=BreakStmt()) != null |
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250 || (stmt=ForStmt()) != null |
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251 || (stmt=TryStmt()) != null |
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252 || (stmt=DoStmt()) != null |
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253 || (stmt=WhileStmt()) != null |
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254 || (stmt=FunctionStmt()) != null |
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255 || (stmt=RepeatStmt()) != null |
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256 || (stmt=IfStmt()) != null |
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257 || (stmt=SetStmt()) != null |
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258 || (stmt=ExpressionsStmt()) != null |
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259 ) { |
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260 stmts.add(stmt); |
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261 } |
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262 } |
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263 |
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264 private Stmt TemplateStmt() throws ParseException { |
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265 int start = parser.currentIndex(); |
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266 Expressions exp = TemplateExpressions(In.NOTHING); |
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267 if( exp == null ) |
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268 return null; |
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269 Expr fnExp = (Expr)nameVar(start,"Io").expr(); |
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270 fnExp = new IndexExpr( se(start), fnExp, new ConstExpr("stdout") ); |
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271 fnExp = new IndexExpr( se(start), fnExp, new ConstExpr("write") ); |
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272 FnCall fnCall = new FnCall( se(start), fnExp, exp ); |
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273 return new ExpressionsStmt(fnCall); |
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274 } |
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275 |
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276 private Expressions TemplateExpressions(In in) throws ParseException { |
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277 if( in.template ) |
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278 return null; |
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279 int start = parser.begin(); |
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280 if( !parser.match( "%>" ) ) |
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281 return parser.failure(null); |
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282 EndOfLine(); |
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283 In inTemplate = in.template(); |
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284 List<Expressions> builder = new ArrayList<Expressions>(); |
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285 while(true) { |
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286 if( parser.match( "<%=" ) ) { |
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287 Spaces(inTemplate); |
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288 builder.add( RequiredExpr(inTemplate) ); |
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289 RequiredMatch( "%>" ); |
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290 } else if( parser.match( "<%" ) ) { |
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291 Spaces(inTemplate); |
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292 return parser.success(ExpList.build(builder)); |
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293 } else { |
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294 int i = parser.currentIndex(); |
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295 do { |
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296 if( parser.match( "%>" ) ) |
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297 throw parser.exception("'%>' unexpected"); |
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298 if( !parser.anyChar() ) |
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299 throw parser.exception("Unclosed template expression"); |
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300 } while( !parser.test( "<%" ) ); |
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301 String match = parser.textFrom(i); |
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302 builder.add( new ConstExpr(match) ); |
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303 } |
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304 } |
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305 } |
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306 |
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307 private Stmt ReturnStmt() throws ParseException { |
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308 int start = parser.begin(); |
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309 if( !Keyword("return",In.NOTHING) ) |
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310 return parser.failure(null); |
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311 Expressions exprs = ExpList(In.NOTHING); |
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312 if( exprs==null ) |
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313 exprs = ExpList.emptyExpList; |
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314 return parser.success( new ReturnStmt(se(start),exprs) ); |
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315 } |
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316 |
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317 private Stmt FunctionStmt() throws ParseException { |
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318 parser.begin(); |
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319 if( !Keyword("function",In.NOTHING) ) |
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320 return parser.failure(null); |
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321 |
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322 int start = parser.currentIndex(); |
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323 Var var = nameVar(start,RequiredName(In.NOTHING)); |
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324 while( parser.match( '.' ) ) { |
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325 Spaces(In.NOTHING); |
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326 var = indexVar( start, expr(var.expr()), NameExpr(In.NOTHING) ); |
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327 } |
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328 Settable fnName = var.settable(); |
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329 |
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330 FnDef fnDef = RequiredFunction(In.NOTHING); |
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331 return parser.success( new SetStmt(fnName,fnDef) ); |
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332 } |
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333 |
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334 private Stmt LocalFunctionStmt() throws ParseException { |
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335 parser.begin(); |
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336 if( !(Keyword("local",In.NOTHING) && Keyword("function",In.NOTHING)) ) |
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337 return parser.failure(null); |
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338 String name = RequiredName(In.NOTHING); |
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339 addSymbol( name ); |
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340 FnDef fnDef = RequiredFunction(In.NOTHING); |
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341 return parser.success( new SetStmt( new SetLocalVar(symbolsSize()-1), fnDef ) ); |
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342 } |
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343 |
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344 private Stmt ImportStmt() throws ParseException { |
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345 int start = parser.begin(); |
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346 if( !Keyword("import",In.NOTHING) ) |
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347 return parser.failure(null); |
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348 Expr importExpr = (Expr)nameVar(start,"require").expr(); |
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349 String modName = StringLiteral(In.NOTHING); |
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350 if( modName==null ) |
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351 return parser.failure(null); |
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352 String varName = modName.substring(modName.lastIndexOf('.')+1); |
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353 LuanSource.Element se = se(start); |
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354 FnCall require = new FnCall( se, importExpr, new ConstExpr(modName) ); |
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355 Settable settable; |
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356 if( interactive ) { |
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357 settable = nameVar(se,varName).settable(); |
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358 } else { |
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359 addSymbol( varName ); |
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360 settable = new SetLocalVar(symbolsSize()-1); |
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361 } |
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362 return parser.success( new SetStmt( settable, expr(require) ) ); |
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363 } |
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364 |
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365 private Stmt BreakStmt() throws ParseException { |
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366 parser.begin(); |
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367 if( !Keyword("break",In.NOTHING) ) |
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368 return parser.failure(null); |
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369 if( frame.loops <= 0 ) |
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370 throw parser.exception("'break' outside of loop"); |
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371 return parser.success( new BreakStmt() ); |
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372 } |
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373 |
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374 private Stmt ForStmt() throws ParseException { |
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375 int start = parser.begin(); |
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376 int stackStart = symbolsSize(); |
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377 if( !Keyword("for",In.NOTHING) ) |
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378 return parser.failure(null); |
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379 List<String> names = RequiredNameList(In.NOTHING); |
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380 if( !Keyword("in",In.NOTHING) ) |
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381 return parser.failure(null); |
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382 Expr expr = expr(RequiredExpr(In.NOTHING)); |
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383 RequiredKeyword("do",In.NOTHING); |
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384 addSymbols(names); |
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385 Stmt loop = RequiredLoopBlock(); |
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386 RequiredKeyword("end",In.NOTHING); |
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387 Stmt stmt = new ForStmt( se(start), stackStart, symbolsSize() - stackStart, expr, loop ); |
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388 popSymbols( symbolsSize() - stackStart ); |
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389 return parser.success(stmt); |
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390 } |
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391 |
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392 private Stmt TryStmt() throws ParseException { |
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393 parser.begin(); |
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394 if( !Keyword("try",In.NOTHING) ) |
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395 return parser.failure(null); |
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396 Stmt tryBlock = RequiredBlock(); |
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397 RequiredKeyword("catch",In.NOTHING); |
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398 String name = RequiredName(In.NOTHING); |
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399 addSymbol(name); |
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400 RequiredKeyword("do",In.NOTHING); |
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401 Stmt catchBlock = RequiredBlock(); |
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402 RequiredKeyword("end",In.NOTHING); |
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403 Stmt stmt = new TryStmt( tryBlock, symbolsSize()-1, catchBlock ); |
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404 popSymbols(1); |
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405 return parser.success(stmt); |
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406 } |
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407 |
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408 private Stmt DoStmt() throws ParseException { |
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409 parser.begin(); |
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410 if( !Keyword("do",In.NOTHING) ) |
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411 return parser.failure(null); |
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412 Stmt stmt = RequiredBlock(); |
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413 RequiredKeyword("end",In.NOTHING); |
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414 return parser.success(stmt); |
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415 } |
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416 |
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417 private boolean LocalStmt(List<Stmt> stmts) throws ParseException { |
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418 parser.begin(); |
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419 if( !Keyword("local",In.NOTHING) ) |
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420 return parser.failure(); |
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421 List<String> names = NameList(In.NOTHING); |
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422 if( names==null ) |
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423 return parser.failure(); |
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424 if( parser.match( '=' ) ) { |
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425 Spaces(In.NOTHING); |
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426 Expressions values = ExpList(In.NOTHING); |
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427 if( values==null ) |
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428 throw parser.exception("Expressions expected"); |
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429 SetLocalVar[] vars = new SetLocalVar[names.size()]; |
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430 int stackStart = symbolsSize(); |
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431 for( int i=0; i<vars.length; i++ ) { |
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432 vars[i] = new SetLocalVar(stackStart+i); |
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433 } |
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434 stmts.add( new SetStmt( vars, values ) ); |
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435 } |
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436 addSymbols(names); |
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437 return parser.success(); |
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438 } |
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439 |
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440 private List<String> RequiredNameList(In in) throws ParseException { |
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441 parser.begin(); |
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442 List<String> names = NameList(in); |
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443 if( names==null ) |
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444 throw parser.exception("Name expected"); |
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445 return parser.success(names); |
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446 } |
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447 |
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448 private List<String> NameList(In in) throws ParseException { |
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449 String name = Name(in); |
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450 if( name==null ) |
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451 return null; |
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452 List<String> names = new ArrayList<String>(); |
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453 names.add(name); |
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454 while( (name=anotherName(in)) != null ) { |
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455 names.add(name); |
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456 } |
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457 return names; |
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458 } |
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459 |
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460 private String anotherName(In in) throws ParseException { |
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461 parser.begin(); |
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462 if( !parser.match( ',' ) ) |
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463 return parser.failure(null); |
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464 Spaces(in); |
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465 String name = Name(in); |
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466 if( name==null ) |
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467 return parser.failure(null); |
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468 return parser.success(name); |
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469 } |
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470 |
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471 private Stmt WhileStmt() throws ParseException { |
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472 int start = parser.begin(); |
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473 if( !Keyword("while",In.NOTHING) ) |
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474 return parser.failure(null); |
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475 Expr cnd = expr(RequiredExpr(In.NOTHING)); |
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476 RequiredKeyword("do",In.NOTHING); |
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477 Stmt loop = RequiredLoopBlock(); |
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478 RequiredKeyword("end",In.NOTHING); |
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479 return parser.success( new WhileStmt(se(start),cnd,loop) ); |
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480 } |
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481 |
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482 private Stmt RepeatStmt() throws ParseException { |
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483 int start = parser.begin(); |
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484 if( !Keyword("repeat",In.NOTHING) ) |
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485 return parser.failure(null); |
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486 Stmt loop = RequiredLoopBlock(); |
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487 RequiredKeyword("until",In.NOTHING); |
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488 Expr cnd = expr(RequiredExpr(In.NOTHING)); |
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489 return parser.success( new RepeatStmt(se(start),loop,cnd) ); |
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490 } |
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491 |
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492 private Stmt RequiredLoopBlock() throws ParseException { |
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493 incLoops(); |
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494 Stmt stmt = RequiredBlock(); |
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495 decLoops(); |
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496 return stmt; |
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497 } |
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498 |
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499 private Stmt IfStmt() throws ParseException { |
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500 parser.begin(); |
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501 if( !Keyword("if",In.NOTHING) ) |
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502 return parser.failure(null); |
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503 return parser.success( IfStmt2() ); |
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504 } |
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505 |
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506 private Stmt IfStmt2() throws ParseException { |
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507 int start = parser.currentIndex(); |
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508 Expr cnd = expr(RequiredExpr(In.NOTHING)); |
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509 RequiredKeyword("then",In.NOTHING); |
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510 Stmt thenBlock = RequiredBlock(); |
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511 Stmt elseBlock; |
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512 if( Keyword("elseif",In.NOTHING) ) { |
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513 elseBlock = IfStmt2(); |
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514 } else { |
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515 elseBlock = Keyword("else",In.NOTHING) ? RequiredBlock() : Stmt.EMPTY; |
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516 RequiredKeyword("end",In.NOTHING); |
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517 } |
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518 return new IfStmt(se(start),cnd,thenBlock,elseBlock); |
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519 } |
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520 |
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521 private Stmt SetStmt() throws ParseException { |
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522 parser.begin(); |
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523 List<Settable> vars = new ArrayList<Settable>(); |
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524 Settable s = SettableVar(); |
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525 if( s == null ) |
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526 return parser.failure(null); |
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527 vars.add(s); |
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528 while( parser.match( ',' ) ) { |
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529 Spaces(In.NOTHING); |
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530 s = SettableVar(); |
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531 if( s == null ) |
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532 return parser.failure(null); |
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533 vars.add(s); |
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534 } |
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535 if( !parser.match( '=' ) ) |
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536 return parser.failure(null); |
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537 Spaces(In.NOTHING); |
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538 Expressions values = ExpList(In.NOTHING); |
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539 if( values==null ) |
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540 throw parser.exception("Expressions expected"); |
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541 return parser.success( new SetStmt( vars.toArray(new Settable[0]), values ) ); |
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542 } |
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543 |
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544 private Stmt ExpressionsStmt() throws ParseException { |
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545 parser.begin(); |
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546 Expressions exp = Expr(In.NOTHING); |
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547 if( exp instanceof FnCall || exp instanceof AndExpr || exp instanceof OrExpr ) |
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548 return parser.success( new ExpressionsStmt(exp) ); |
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549 return parser.failure(null); |
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550 } |
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551 |
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552 private Settable SettableVar() throws ParseException { |
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553 int start = parser.begin(); |
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554 Var var = VarZ(In.NOTHING); |
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555 if( var==null ) |
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556 return parser.failure(null); |
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557 return parser.success( var.settable() ); |
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558 } |
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559 |
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560 private Expressions RequiredExpr(In in) throws ParseException { |
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561 parser.begin(); |
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562 return parser.success(required(Expr(in),"Bad expression")); |
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563 } |
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564 |
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565 private Expressions Expr(In in) throws ParseException { |
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566 parser.begin(); |
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567 Expressions exp; |
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568 return (exp = VarArgs(in)) != null |
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569 || (exp = OrExpr(in)) != null |
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570 ? parser.success(exp) |
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571 : parser.failure((Expressions)null) |
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572 ; |
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573 } |
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574 |
154
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575 private Expressions OrExpr(In in) throws ParseException { |
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576 int start = parser.begin(); |
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577 Expressions exp = AndExpr(in); |
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578 if( exp==null ) |
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579 return parser.failure(null); |
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580 while( Keyword("or",in) ) { |
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581 exp = new OrExpr( se(start), expr(exp), required(expr(AndExpr(in))) ); |
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582 } |
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583 return parser.success(exp); |
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584 } |
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585 |
154
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586 private Expressions AndExpr(In in) throws ParseException { |
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587 int start = parser.begin(); |
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588 Expressions exp = RelExpr(in); |
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589 if( exp==null ) |
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590 return parser.failure(null); |
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591 while( Keyword("and",in) ) { |
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592 exp = new AndExpr( se(start), expr(exp), required(expr(RelExpr(in))) ); |
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593 } |
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594 return parser.success(exp); |
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595 } |
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596 |
154
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597 private Expressions RelExpr(In in) throws ParseException { |
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598 int start = parser.begin(); |
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599 Expressions exp = ConcatExpr(in); |
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600 if( exp==null ) |
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601 return parser.failure(null); |
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602 while(true) { |
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603 if( parser.match("==") ) { |
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604 Spaces(in); |
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605 exp = new EqExpr( se(start), expr(exp), required(expr(ConcatExpr(in))) ); |
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606 } else if( parser.match("~=") ) { |
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607 Spaces(in); |
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608 exp = new NotExpr( se(start), new EqExpr( se(start), expr(exp), required(expr(ConcatExpr(in))) ) ); |
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609 } else if( parser.match("<=") ) { |
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610 Spaces(in); |
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611 exp = new LeExpr( se(start), expr(exp), required(expr(ConcatExpr(in))) ); |
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612 } else if( parser.match(">=") ) { |
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613 Spaces(in); |
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614 exp = new LeExpr( se(start), required(expr(ConcatExpr(in))), expr(exp) ); |
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615 } else if( parser.match("<") ) { |
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616 Spaces(in); |
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617 exp = new LtExpr( se(start), expr(exp), required(expr(ConcatExpr(in))) ); |
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618 } else if( parser.match(">") ) { |
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619 Spaces(in); |
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620 exp = new LtExpr( se(start), required(expr(ConcatExpr(in))), expr(exp) ); |
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621 } else |
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622 break; |
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623 } |
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624 return parser.success(exp); |
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625 } |
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626 |
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627 private Expressions ConcatExpr(In in) throws ParseException { |
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628 int start = parser.begin(); |
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629 Expressions exp = SumExpr(in); |
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630 if( exp==null ) |
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631 return parser.failure(null); |
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632 if( parser.match("..") ) { |
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633 Spaces(in); |
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634 exp = new ConcatExpr( se(start), expr(exp), required(expr(ConcatExpr(in))) ); |
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635 } |
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636 return parser.success(exp); |
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637 } |
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638 |
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639 private Expressions SumExpr(In in) throws ParseException { |
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640 int start = parser.begin(); |
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641 Expressions exp = TermExpr(in); |
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642 if( exp==null ) |
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643 return parser.failure(null); |
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644 while(true) { |
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645 if( parser.match('+') ) { |
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646 Spaces(in); |
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647 exp = new AddExpr( se(start), expr(exp), required(expr(TermExpr(in))) ); |
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648 } else if( Minus() ) { |
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649 Spaces(in); |
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650 exp = new SubExpr( se(start), expr(exp), required(expr(TermExpr(in))) ); |
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651 } else |
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652 break; |
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653 } |
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654 return parser.success(exp); |
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655 } |
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656 |
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657 private boolean Minus() { |
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658 parser.begin(); |
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659 return parser.match('-') && !parser.match('-') ? parser.success() : parser.failure(); |
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660 } |
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661 |
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662 private Expressions TermExpr(In in) throws ParseException { |
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663 int start = parser.begin(); |
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664 Expressions exp = UnaryExpr(in); |
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665 if( exp==null ) |
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666 return parser.failure(null); |
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667 while(true) { |
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668 if( parser.match('*') ) { |
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669 Spaces(in); |
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670 exp = new MulExpr( se(start), expr(exp), required(expr(UnaryExpr(in))) ); |
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671 } else if( parser.match('/') ) { |
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672 Spaces(in); |
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673 exp = new DivExpr( se(start), expr(exp), required(expr(UnaryExpr(in))) ); |
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674 } else if( Mod() ) { |
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675 Spaces(in); |
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676 exp = new ModExpr( se(start), expr(exp), required(expr(UnaryExpr(in))) ); |
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677 } else |
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678 break; |
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679 } |
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680 return parser.success(exp); |
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681 } |
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682 |
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683 private boolean Mod() { |
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684 parser.begin(); |
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685 return parser.match('%') && !parser.match('>') ? parser.success() : parser.failure(); |
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686 } |
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687 |
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688 private Expressions UnaryExpr(In in) throws ParseException { |
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689 int start = parser.begin(); |
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690 if( parser.match('#') ) { |
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691 Spaces(in); |
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692 return parser.success( new LenExpr( se(start), required(expr(UnaryExpr(in))) ) ); |
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693 } |
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694 if( Minus() ) { |
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695 Spaces(in); |
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696 return parser.success( new UnmExpr( se(start), required(expr(UnaryExpr(in))) ) ); |
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697 } |
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698 if( Keyword("not",in) ) { |
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699 Spaces(in); |
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700 return parser.success( new NotExpr( se(start), required(expr(UnaryExpr(in))) ) ); |
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701 } |
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702 Expressions exp = PowExpr(in); |
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703 if( exp==null ) |
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704 return parser.failure(null); |
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705 return parser.success(exp); |
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706 } |
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707 |
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708 private Expressions PowExpr(In in) throws ParseException { |
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709 int start = parser.begin(); |
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710 Expressions exp = SingleExpr(in); |
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711 if( exp==null ) |
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712 return parser.failure(null); |
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713 if( parser.match('^') ) { |
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714 Spaces(in); |
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715 exp = new ConcatExpr( se(start), expr(exp), required(expr(PowExpr(in))) ); |
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716 } |
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717 return parser.success(exp); |
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718 } |
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719 |
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720 private Expressions SingleExpr(In in) throws ParseException { |
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721 parser.begin(); |
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722 Expressions exp; |
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723 exp = FunctionExpr(in); |
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724 if( exp != null ) |
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725 return parser.success(exp); |
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726 exp = TableExpr(in); |
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727 if( exp != null ) |
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728 return parser.success(exp); |
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729 exp = VarExp(in); |
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730 if( exp != null ) |
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731 return parser.success(exp); |
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732 exp = Literal(in); |
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733 if( exp != null ) |
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734 return parser.success(exp); |
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735 return parser.failure(null); |
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736 } |
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737 |
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738 private Expr FunctionExpr(In in) throws ParseException { |
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739 if( !Keyword("function",in) ) |
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740 return null; |
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741 return RequiredFunction(in); |
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742 } |
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743 |
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744 private FnDef RequiredFunction(In in) throws ParseException { |
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745 int start = parser.begin(); |
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746 RequiredMatch('('); |
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747 In inParens = in.parens(); |
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748 Spaces(inParens); |
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749 frame = new Frame(frame); |
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750 List<String> names = NameList(in); |
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751 if( names != null ) { |
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752 addSymbols(names); |
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753 if( parser.match(',') ) { |
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754 Spaces(inParens); |
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755 if( !parser.match("...") ) |
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756 throw parser.exception(); |
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757 frame.isVarArg = true; |
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758 } |
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759 } else if( parser.match("...") ) { |
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760 Spaces(inParens); |
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761 frame.isVarArg = true; |
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762 } |
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763 RequiredMatch(')'); |
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764 Spaces(in); |
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765 Stmt block = RequiredBlock(); |
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766 RequiredKeyword("end",in); |
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767 FnDef fnDef = newFnDef(start,block); |
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768 frame = frame.parent; |
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769 return parser.success(fnDef); |
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770 } |
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771 |
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772 private VarArgs VarArgs(In in) throws ParseException { |
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773 int start = parser.begin(); |
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774 if( !frame.isVarArg || !parser.match("...") ) |
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775 return parser.failure(null); |
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776 Spaces(in); |
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777 return parser.success( new VarArgs(se(start)) ); |
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778 } |
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779 |
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780 private Expr TableExpr(In in) throws ParseException { |
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781 int start = parser.begin(); |
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782 if( !parser.match('{') ) |
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783 return parser.failure(null); |
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784 In inParens = in.parens(); |
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785 Spaces(inParens); |
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786 List<TableExpr.Field> fields = new ArrayList<TableExpr.Field>(); |
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787 List<Expressions> builder = new ArrayList<Expressions>(); |
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788 while( Field(fields,builder,in) && FieldSep(inParens) ); |
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789 Spaces(inParens); |
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790 if( !parser.match('}') ) |
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791 throw parser.exception("Expected table element or '}'"); |
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792 return parser.success( new TableExpr( se(start), fields.toArray(new TableExpr.Field[0]), ExpList.build(builder) ) ); |
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793 } |
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794 |
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795 private boolean FieldSep(In in) throws ParseException { |
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796 if( !parser.anyOf(",;") ) |
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797 return false; |
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798 Spaces(in); |
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799 return true; |
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800 } |
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801 |
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802 private boolean Field(List<TableExpr.Field> fields,List<Expressions> builder,In in) throws ParseException { |
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803 parser.begin(); |
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804 Expr exp = SubExpr(in); |
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805 if( exp==null ) |
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806 exp = NameExpr(in); |
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807 if( exp!=null && parser.match('=') ) { |
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808 Spaces(in); |
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809 fields.add( new TableExpr.Field( exp, required(expr(Expr(in))) ) ); |
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810 return parser.success(); |
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811 } |
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812 parser.rollback(); |
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813 Expressions exprs = Expr(in); |
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814 if( exprs != null ) { |
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815 builder.add(exprs); |
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816 return parser.success(); |
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817 } |
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818 return parser.failure(); |
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819 } |
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820 |
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821 private Expressions VarExp(In in) throws ParseException { |
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822 Var var = VarZ(in); |
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823 return var==null ? null : var.expr(); |
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824 } |
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825 |
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826 private Var VarZ(In in) throws ParseException { |
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827 int start = parser.begin(); |
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828 Var var = VarStart(in); |
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829 if( var==null ) |
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830 return parser.failure(null); |
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831 Var var2; |
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832 while( (var2=Var2(in,start,var.expr())) != null ) { |
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833 var = var2; |
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834 } |
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835 return parser.success(var); |
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836 } |
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837 |
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838 private Var Var2(In in,int start,Expressions exp1) throws ParseException { |
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839 parser.begin(); |
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840 Var var = VarExt(in,start,exp1); |
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841 if( var != null ) |
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842 return parser.success(var); |
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843 if( parser.match("->") ) { |
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844 Spaces(in); |
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845 List<Expressions> builder = new ArrayList<Expressions>(); |
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846 builder.add(exp1); |
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847 Expr exp2 = expr(RequiredVarExpB(in)); |
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848 FnCall fnCall = required(Args( in, start, exp2, builder )); |
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849 return parser.success(exprVar(fnCall)); |
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850 } |
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851 FnCall fnCall = Args( in, start, expr(exp1), new ArrayList<Expressions>() ); |
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852 if( fnCall != null ) |
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853 return parser.success(exprVar(fnCall)); |
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854 return parser.failure(null); |
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855 } |
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856 |
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857 private Expressions RequiredVarExpB(In in) throws ParseException { |
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858 int start = parser.begin(); |
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859 Var var = required(VarStart(in)); |
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860 Var var2; |
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861 while( (var2=VarExt(in,start,var.expr())) != null ) { |
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862 var = var2; |
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863 } |
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864 return parser.success(var.expr()); |
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865 } |
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866 |
154
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867 private Var VarExt(In in,int start,Expressions exp1) throws ParseException { |
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868 parser.begin(); |
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869 Expr exp2 = SubExpr(in); |
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870 if( exp2 != null ) |
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871 return parser.success(indexVar(start,expr(exp1),exp2)); |
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872 if( parser.match('.') ) { |
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873 Spaces(in); |
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874 exp2 = NameExpr(in); |
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875 if( exp2!=null ) |
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876 return parser.success(indexVar(start,expr(exp1),exp2)); |
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877 } |
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878 return parser.failure(null); |
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879 } |
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880 |
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881 private Var VarStart(In in) throws ParseException { |
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882 int start = parser.begin(); |
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883 if( parser.match('(') ) { |
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884 In inParens = in.parens(); |
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885 Spaces(inParens); |
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886 Expr exp = expr(RequiredExpr(inParens)); |
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887 RequiredMatch(')'); |
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888 Spaces(in); |
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889 return parser.success(exprVar(exp)); |
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890 } |
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891 String name = Name(in); |
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892 if( name != null ) |
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893 return parser.success(nameVar(start,name)); |
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894 return parser.failure(null); |
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895 } |
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896 |
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897 private Expr env() { |
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898 int index = stackIndex(_ENV); |
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899 if( index != -1 ) |
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900 return new GetLocalVar(null,index); |
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901 index = upValueIndex(_ENV); |
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902 if( index != -1 ) |
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903 return new GetUpVar(null,index); |
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904 throw new RuntimeException("_ENV not found"); |
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905 } |
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906 |
104
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907 private interface Var { |
154
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908 public Expressions expr(); |
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909 public Settable settable(); |
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910 } |
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911 |
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912 private Var nameVar(final int start,final String name) { |
157
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913 return nameVar(se(start),name); |
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914 } |
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915 |
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916 private Var nameVar(final LuanSource.Element se,final String name) { |
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917 return new Var() { |
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918 |
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919 public Expr expr() { |
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920 int index = stackIndex(name); |
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921 if( index != -1 ) |
157
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922 return new GetLocalVar(se,index); |
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923 index = upValueIndex(name); |
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924 if( index != -1 ) |
157
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925 return new GetUpVar(se,index); |
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926 return new IndexExpr( se, env(), new ConstExpr(name) ); |
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927 } |
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928 |
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929 public Settable settable() { |
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930 int index = stackIndex(name); |
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931 if( index != -1 ) |
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932 return new SetLocalVar(index); |
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933 index = upValueIndex(name); |
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934 if( index != -1 ) |
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935 return new SetUpVar(index); |
157
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936 return new SetTableEntry( se, env(), new ConstExpr(name) ); |
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937 } |
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938 }; |
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939 } |
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940 |
154
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941 private Var exprVar(final Expressions expr) { |
104
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942 return new Var() { |
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943 |
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944 public Expressions expr() { |
104
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945 return expr; |
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946 } |
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947 |
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948 public Settable settable() { |
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949 return null; |
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950 } |
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951 }; |
11
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952 } |
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953 |
104
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954 private Var indexVar(final int start,final Expr table,final Expr key) { |
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955 return new Var() { |
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956 |
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957 public Expr expr() { |
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958 return new IndexExpr( se(start), table, key ); |
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959 } |
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960 |
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961 public Settable settable() { |
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962 return new SetTableEntry(se(start),table,key); |
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963 } |
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964 }; |
9
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965 } |
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966 |
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967 private FnCall Args(In in,int start,Expr fn,List<Expressions> builder) throws ParseException { |
104
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968 parser.begin(); |
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969 return args(in,builder) |
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970 ? parser.success( new FnCall( se(start), fn, ExpList.build(builder) ) ) |
107
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971 : parser.failure((FnCall)null); |
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972 } |
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973 |
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974 private boolean args(In in,List<Expressions> builder) throws ParseException { |
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975 if( parser.match('(') ) { |
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976 In inParens = in.parens(); |
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977 Spaces(inParens); |
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978 ExpList(inParens,builder); // optional |
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979 if( !parser.match(')') ) |
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980 throw parser.exception("Expression or ')' expected"); |
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981 Spaces(in); |
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982 return true; |
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983 } |
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984 Expr exp = TableExpr(in); |
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985 if( exp != null ) { |
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986 builder.add(exp); |
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987 return true; |
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988 } |
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989 String s = StringLiteral(in); |
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990 if( s != null ) { |
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991 builder.add( new ConstExpr(s) ); |
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992 return true; |
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993 } |
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994 Expressions exps = TemplateExpressions(in); |
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995 if( exps != null ) { |
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996 builder.add(exps); |
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997 return true; |
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998 } |
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999 return false; |
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1000 } |
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1001 |
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1002 private Expressions ExpList(In in) throws ParseException { |
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1003 List<Expressions> builder = new ArrayList<Expressions>(); |
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1004 return ExpList(in,builder) ? ExpList.build(builder) : null; |
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1005 } |
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1006 |
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1007 private boolean ExpList(In in,List<Expressions> builder) throws ParseException { |
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1008 parser.begin(); |
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1009 Expressions exp = TemplateExpressions(in); |
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1010 if( exp != null ) { |
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1011 builder.add(exp); |
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1012 return parser.success(); |
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1013 } |
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1014 exp = Expr(in); |
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1015 if( exp==null ) |
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1016 return parser.failure(); |
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1017 builder.add(exp); |
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1018 while( parser.match(',') ) { |
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1019 Spaces(in); |
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1020 exp = TemplateExpressions(in); |
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1021 if( exp != null ) { |
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1022 builder.add(exp); |
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1023 return parser.success(); |
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1024 } |
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1025 builder.add( RequiredExpr(in) ); |
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1026 } |
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1027 return parser.success(); |
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1028 } |
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1029 |
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1030 private Expr SubExpr(In in) throws ParseException { |
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1031 parser.begin(); |
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1032 if( !parser.match('[') ) |
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1033 return parser.failure(null); |
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1034 In inParens = in.parens(); |
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1035 Spaces(inParens); |
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1036 Expr exp = expr(RequiredExpr(inParens)); |
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1037 RequiredMatch(']'); |
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1038 Spaces(in); |
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1039 return parser.success(exp); |
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1040 } |
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1041 |
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1042 private Expr NameExpr(In in) throws ParseException { |
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1043 String name = Name(in); |
104
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1044 return name==null ? null : new ConstExpr(name); |
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1045 } |
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1046 |
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1047 private String RequiredName(In in) throws ParseException { |
104
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1048 parser.begin(); |
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1049 String name = Name(in); |
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1050 if( name==null ) |
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1051 throw parser.exception("Name expected"); |
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1052 return parser.success(name); |
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1053 } |
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1054 |
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1055 private String Name(In in) throws ParseException { |
104
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1056 int start = parser.begin(); |
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1057 if( !NameFirstChar() ) |
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1058 return parser.failure(null); |
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1059 while( NameChar() ); |
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1060 String match = parser.textFrom(start); |
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1061 if( keywords.contains(match) ) |
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1062 return parser.failure(null); |
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1063 Spaces(in); |
104
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1064 return parser.success(match); |
17
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1065 } |
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1066 |
104
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1067 private boolean NameChar() { |
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1068 return NameFirstChar() || Digit(); |
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1069 } |
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1070 |
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1071 private boolean NameFirstChar() { |
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1072 return parser.inCharRange('a', 'z') || parser.inCharRange('A', 'Z') || parser.match('_'); |
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1073 } |
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1074 |
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1075 private void RequiredMatch(char c) throws ParseException { |
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1076 if( !parser.match(c) ) |
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1077 throw parser.exception("'"+c+"' expected"); |
9
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1078 } |
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1079 |
104
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1080 private void RequiredMatch(String s) throws ParseException { |
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1081 if( !parser.match(s) ) |
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1082 throw parser.exception("'"+s+"' expected"); |
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1083 } |
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1084 |
129
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1085 private void RequiredKeyword(String keyword,In in) throws ParseException { |
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1086 if( !Keyword(keyword,in) ) |
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1087 throw parser.exception("'"+keyword+"' expected"); |
9
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1088 } |
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1089 |
129
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1090 private boolean Keyword(String keyword,In in) throws ParseException { |
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1091 parser.begin(); |
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1092 if( !parser.match(keyword) || NameChar() ) |
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1093 return parser.failure(); |
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1094 Spaces(in); |
104
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1095 return parser.success(); |
12
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1096 } |
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1097 |
104
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1098 private static final Set<String> keywords = new HashSet<String>(Arrays.asList( |
12
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1099 "and", |
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1100 "break", |
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1101 "catch", |
12
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1102 "do", |
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1103 "else", |
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1104 "elseif", |
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1105 "end", |
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1106 "false", |
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1107 "for", |
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1108 "function", |
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1109 "goto", |
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1110 "if", |
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1111 "import", |
12
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1112 "in", |
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1113 "local", |
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1114 "nil", |
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1115 "not", |
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1116 "or", |
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1117 "repeat", |
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1118 "return", |
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1119 "then", |
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1120 "true", |
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1121 "try", |
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1122 "until", |
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1123 "while" |
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1124 )); |
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1125 |
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1126 private Expr Literal(In in) throws ParseException { |
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1127 if( NilLiteral(in) ) |
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1128 return new ConstExpr(null); |
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1129 Boolean b = BooleanLiteral(in); |
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1130 if( b != null ) |
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1131 return new ConstExpr(b); |
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1132 Number n = NumberLiteral(in); |
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1133 if( n != null ) |
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1134 return new ConstExpr(n); |
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1135 String s = StringLiteral(in); |
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1136 if( s != null ) |
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1137 return new ConstExpr(s); |
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1138 return null; |
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1139 } |
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1140 |
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1141 private boolean NilLiteral(In in) throws ParseException { |
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1142 return Keyword("nil",in); |
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1143 } |
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1144 |
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1145 private Boolean BooleanLiteral(In in) throws ParseException { |
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1146 if( Keyword("true",in) ) |
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1147 return true; |
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1148 if( Keyword("false",in) ) |
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1149 return false; |
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1150 return null; |
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1151 } |
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1152 |
129
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1153 private Number NumberLiteral(In in) throws ParseException { |
104
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1154 parser.begin(); |
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1155 Number n; |
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1156 if( parser.matchIgnoreCase("0x") ) { |
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1157 n = HexNumber(); |
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1158 } else { |
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1159 n = DecNumber(); |
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1160 } |
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1161 if( n==null || NameChar() ) |
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1162 return parser.failure(null); |
129
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1163 Spaces(in); |
104
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1164 return parser.success(n); |
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1165 } |
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1166 |
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1167 private Number DecNumber() { |
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1168 int start = parser.begin(); |
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1169 if( Int() ) { |
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1170 if( parser.match('.') ) |
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1171 Int(); // optional |
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1172 } else if( parser.match('.') && Int() ) { |
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1173 // ok |
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1174 } else |
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1175 return parser.failure(null); |
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1176 Exponent(); // optional |
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1177 return parser.success(Double.valueOf(parser.textFrom(start))); |
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1178 } |
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1179 |
104
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1180 private boolean Exponent() { |
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1181 parser.begin(); |
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1182 if( !parser.matchIgnoreCase("e") ) |
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1183 return parser.failure(); |
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1184 parser.anyOf("+-"); // optional |
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1185 if( !Int() ) |
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1186 return parser.failure(); |
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1187 return parser.success(); |
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1188 } |
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1189 |
104
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1190 private boolean Int() { |
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1191 if( !Digit() ) |
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1192 return false; |
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1193 while( Digit() ); |
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1194 return true; |
5
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1195 } |
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1196 |
104
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1197 private boolean Digit() { |
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1198 return parser.inCharRange('0', '9'); |
16
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1199 } |
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1200 |
104
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1201 private Number HexNumber() { |
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1202 int start = parser.begin(); |
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1203 double n; |
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1204 if( HexInt() ) { |
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1205 n = (double)Long.parseLong(parser.textFrom(start),16); |
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1206 if( parser.match('.') ) { |
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1207 start = parser.currentIndex(); |
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1208 if( HexInt() ) { |
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1209 String dec = parser.textFrom(start); |
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1210 n += (double)Long.parseLong(dec,16) / Math.pow(16,dec.length()); |
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1211 } |
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1212 } |
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1213 } else if( parser.match('.') && HexInt() ) { |
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1214 String dec = parser.textFrom(start+1); |
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1215 n = (double)Long.parseLong(dec,16) / Math.pow(16,dec.length()); |
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1216 } else { |
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1217 return parser.failure(null); |
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1218 } |
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1219 if( parser.matchIgnoreCase("p") ) { |
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1220 parser.anyOf("+-"); // optional |
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1221 start = parser.currentIndex(); |
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1222 if( !HexInt() ) |
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1223 return parser.failure(null); |
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1224 n *= Math.pow(2,(double)Long.parseLong(parser.textFrom(start))); |
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1225 } |
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1226 return parser.success(Double.valueOf(n)); |
16
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1227 } |
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1228 |
104
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1229 private boolean HexInt() { |
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1230 if( !HexDigit() ) |
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1231 return false; |
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1232 while( HexDigit() ); |
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1233 return true; |
16
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1234 } |
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1235 |
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1236 |
104
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1237 private boolean HexDigit() { |
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1238 return Digit() || parser.anyOf("abcdefABCDEF"); |
6
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1239 } |
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1240 |
129
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1241 private String StringLiteral(In in) throws ParseException { |
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1242 String s; |
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1243 if( (s=QuotedString('"'))==null |
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1244 && (s=QuotedString('\''))==null |
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1245 && (s=LongString())==null |
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1246 ) |
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1247 return null; |
129
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1248 Spaces(in); |
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1249 return s; |
16
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1250 } |
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1251 |
104
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1252 private String LongString() throws ParseException { |
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1253 parser.begin(); |
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1254 if( !parser.match('[') ) |
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1255 return parser.failure(null); |
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1256 int start = parser.currentIndex(); |
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1257 while( parser.match('=') ); |
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1258 int nEquals = parser.currentIndex() - start; |
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1259 if( !parser.match('[') ) |
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1260 return parser.failure(null); |
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1261 EndOfLine(); |
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1262 start = parser.currentIndex(); |
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1263 while( !LongBracketsEnd(nEquals) ) { |
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1264 if( !parser.anyChar() ) |
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1265 throw parser.exception("Unclosed long string"); |
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1266 } |
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1267 String s = parser.text.substring( start, parser.currentIndex() - nEquals - 2 ); |
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1268 return parser.success(s); |
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1269 } |
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1270 |
104
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1271 private String QuotedString(char quote) throws ParseException { |
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1272 parser.begin(); |
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1273 if( !parser.match(quote) ) |
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1274 return parser.failure(null); |
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1275 StringBuilder buf = new StringBuilder(); |
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1276 while( !parser.match(quote) ) { |
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1277 Character c = EscSeq(); |
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1278 if( c != null ) { |
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1279 buf.append(c); |
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1280 } else { |
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1281 if( !parser.anyChar() ) |
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1282 throw parser.exception("Unclosed string"); |
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1283 buf.append(parser.lastChar()); |
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1284 } |
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1285 } |
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1286 return parser.success(buf.toString()); |
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1287 } |
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1288 |
104
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1289 private Character EscSeq() { |
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1290 parser.begin(); |
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1291 if( !parser.match('\\') ) |
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1292 return parser.failure(null); |
155
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1293 if( parser.match('a') ) return parser.success('\u0007'); |
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1294 if( parser.match('b') ) return parser.success('\b'); |
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1295 if( parser.match('f') ) return parser.success('\f'); |
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1296 if( parser.match('n') ) return parser.success('\n'); |
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1297 if( parser.match('r') ) return parser.success('\r'); |
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1298 if( parser.match('t') ) return parser.success('\t'); |
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1299 if( parser.match('v') ) return parser.success('\u000b'); |
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1300 if( parser.match('\\') ) return parser.success('\\'); |
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1301 if( parser.match('"') ) return parser.success('"'); |
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1302 if( parser.match('\'') ) return parser.success('\''); |
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1303 int start = parser.currentIndex(); |
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1304 if( parser.match('x') && HexDigit() && HexDigit() ) |
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1305 return parser.success((char)Integer.parseInt(parser.textFrom(start+1),16)); |
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1306 if( Digit() ) { |
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1307 if( Digit() ) Digit(); // optional |
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1308 return parser.success((char)Integer.parseInt(parser.textFrom(start))); |
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1309 } |
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1310 return parser.failure(null); |
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1311 } |
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1312 |
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1313 private void Spaces(In in) throws ParseException { |
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1314 while( parser.anyOf(" \t") || Comment() || ContinueOnNextLine() || in.parens && NewLine() ); |
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1315 } |
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1316 |
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1317 private boolean ContinueOnNextLine() { |
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1318 parser.begin(); |
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1319 return parser.match('\\') && EndOfLine() ? parser.success() : parser.failure(); |
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1320 } |
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1321 |
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1322 private boolean NewLine() { |
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1323 if( !EndOfLine() ) |
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1324 return false; |
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1325 if( parser.match("--") ) { |
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1326 while( parser.noneOf("\r\n") ); |
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1327 } |
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1328 return true; |
3971113699b8
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1329 } |
3971113699b8
add NumericForStmt
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1330 |
104
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remove parboiled and rewrite parser;
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1331 private boolean Comment() throws ParseException { |
754e6030c029
remove parboiled and rewrite parser;
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1332 parser.begin(); |
754e6030c029
remove parboiled and rewrite parser;
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1333 if( !parser.match("--[") ) |
754e6030c029
remove parboiled and rewrite parser;
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1334 return parser.failure(); |
754e6030c029
remove parboiled and rewrite parser;
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1335 int start = parser.currentIndex(); |
754e6030c029
remove parboiled and rewrite parser;
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1336 while( parser.match('=') ); |
754e6030c029
remove parboiled and rewrite parser;
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1337 int nEquals = parser.currentIndex() - start; |
754e6030c029
remove parboiled and rewrite parser;
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1338 if( !parser.match('[') ) |
754e6030c029
remove parboiled and rewrite parser;
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1339 return parser.failure(); |
754e6030c029
remove parboiled and rewrite parser;
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1340 while( !LongBracketsEnd(nEquals) ) { |
754e6030c029
remove parboiled and rewrite parser;
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1341 if( !parser.anyChar() ) |
754e6030c029
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1342 throw parser.exception("Unclosed comment"); |
754e6030c029
remove parboiled and rewrite parser;
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1343 } |
754e6030c029
remove parboiled and rewrite parser;
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1344 return parser.success(); |
754e6030c029
remove parboiled and rewrite parser;
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1345 } |
754e6030c029
remove parboiled and rewrite parser;
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1346 |
754e6030c029
remove parboiled and rewrite parser;
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1347 private boolean LongBracketsEnd(int nEquals) { |
754e6030c029
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1348 parser.begin(); |
754e6030c029
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1349 if( !parser.match(']') ) |
754e6030c029
remove parboiled and rewrite parser;
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1350 return parser.failure(); |
754e6030c029
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1351 while( nEquals-- > 0 ) { |
754e6030c029
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1352 if( !parser.match('=') ) |
754e6030c029
remove parboiled and rewrite parser;
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1353 return parser.failure(); |
754e6030c029
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1354 } |
754e6030c029
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1355 if( !parser.match(']') ) |
754e6030c029
remove parboiled and rewrite parser;
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1356 return parser.failure(); |
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1357 return parser.success(); |
12
9cea1aea5eef
CmdLine can run files
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1358 } |
9cea1aea5eef
CmdLine can run files
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1359 |
5
9ef0fd711101
start LuaParser
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1360 } |