Mercurial Hosting > luan
annotate src/luan/interp/LuaParser.java @ 28:df923e5835b2
fix local initial assignment
git-svn-id: https://luan-java.googlecode.com/svn/trunk@29 21e917c8-12df-6dd8-5cb6-c86387c605b9
author | fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9> |
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date | Fri, 07 Dec 2012 05:49:17 +0000 |
parents | 409871b33355 |
children | 8d8f4f5caef4 |
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1 package luan.interp; |
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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 org.parboiled.BaseParser; |
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10 import org.parboiled.Parboiled; |
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11 import org.parboiled.Rule; |
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12 import org.parboiled.parserunners.ReportingParseRunner; |
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13 import org.parboiled.support.ParsingResult; |
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14 import org.parboiled.support.Var; |
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15 import org.parboiled.support.StringVar; |
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16 import org.parboiled.support.StringBuilderVar; |
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17 import org.parboiled.support.ValueStack; |
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18 import org.parboiled.errors.ErrorUtils; |
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19 import luan.Lua; |
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20 import luan.LuaNumber; |
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21 import luan.LuaState; |
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22 |
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23 |
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24 public class LuaParser extends BaseParser<Object> { |
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25 |
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26 static final class Frame { |
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27 final Frame parent; |
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28 final List<String> symbols = new ArrayList<String>(); |
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29 int stackSize = 0; |
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30 int loops = 0; |
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31 boolean isVarArg = false; |
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32 |
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33 Frame(Frame parent) { |
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34 this.parent = parent; |
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35 } |
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36 } |
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37 |
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38 int nEquals; |
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39 int parens = 0; |
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40 Frame frame = new Frame(null); |
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41 |
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42 boolean nEquals(int n) { |
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43 nEquals = n; |
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44 return true; |
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45 } |
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46 |
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47 boolean incParens() { |
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48 parens++; |
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49 return true; |
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50 } |
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51 |
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52 boolean decParens() { |
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53 parens--; |
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54 return true; |
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55 } |
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56 |
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57 List<String> symbols() { |
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58 return frame.symbols; |
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59 } |
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60 |
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61 int symbolsSize() { |
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62 return frame.symbols.size(); |
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63 } |
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64 |
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65 boolean addSymbol(String name) { |
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66 frame.symbols.add(name); |
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67 if( frame.stackSize < symbolsSize() ) |
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68 frame.stackSize = symbolsSize(); |
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69 return true; |
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70 } |
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71 |
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72 boolean addSymbols(List<String> names) { |
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73 frame.symbols.addAll(names); |
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74 if( frame.stackSize < symbolsSize() ) |
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75 frame.stackSize = symbolsSize(); |
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76 return true; |
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77 } |
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78 |
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79 int index(String name) { |
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80 List<String> symbols = frame.symbols; |
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81 int i = symbols.size(); |
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82 while( --i >= 0 ) { |
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83 if( symbols.get(i).equals(name) ) |
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84 return i; |
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85 } |
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86 return -1; |
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87 } |
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88 |
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89 boolean popSymbols(int n) { |
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90 List<String> symbols = frame.symbols; |
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91 while( n-- > 0 ) { |
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92 symbols.remove(symbols.size()-1); |
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93 } |
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94 return true; |
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95 } |
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96 |
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97 boolean incLoops() { |
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98 frame.loops++; |
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99 return true; |
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100 } |
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101 |
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102 boolean decLoops() { |
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103 frame.loops--; |
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104 return true; |
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105 } |
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106 |
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107 |
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108 public Rule Target() { |
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109 return Sequence( |
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110 Spaces(), |
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111 FirstOf( |
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112 Sequence( ExpList(), EOI ), |
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113 Sequence( |
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114 action( frame.isVarArg = true ), |
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115 Block(), |
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116 EOI, |
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117 push( new Chunk( (Stmt)pop(), frame.stackSize, 0, frame.isVarArg ) ) |
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118 ) |
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119 ) |
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120 ); |
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121 } |
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122 |
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123 Rule Block() { |
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124 Var<List<Stmt>> stmts = new Var<List<Stmt>>(new ArrayList<Stmt>()); |
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125 Var<Integer> stackStart = new Var<Integer>(symbolsSize()); |
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126 return Sequence( |
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127 Optional( Stmt(stmts) ), |
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128 ZeroOrMore( |
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129 StmtSep(), |
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130 Optional( Stmt(stmts) ) |
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131 ), |
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132 push( newBlock(stmts.get(),stackStart.get()) ) |
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133 ); |
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134 } |
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135 |
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136 Stmt newBlock(List<Stmt> stmts,int stackStart) { |
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137 int stackEnd = symbolsSize(); |
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138 popSymbols( stackEnd - stackStart ); |
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139 if( stmts.isEmpty() ) |
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140 return Stmt.EMPTY; |
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141 if( stmts.size()==1 && stackStart==stackEnd ) |
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142 return stmts.get(0); |
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143 return new Block( stmts.toArray(new Stmt[0]), stackStart, stackEnd ); |
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144 } |
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145 |
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146 Rule StmtSep() { |
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147 return Sequence( |
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148 FirstOf( |
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149 ';', |
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150 Sequence( |
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151 Optional( "--", ZeroOrMore(NoneOf("\r\n")) ), |
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152 EndOfLine() |
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153 ) |
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154 ), |
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155 Spaces() |
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156 ); |
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157 } |
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158 |
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159 Rule EndOfLine() { |
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160 return FirstOf("\r\n", '\r', '\n'); |
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161 } |
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162 |
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163 Rule Stmt(Var<List<Stmt>> stmts) { |
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164 return FirstOf( |
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165 LocalStmt(stmts), |
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166 Sequence( |
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167 FirstOf( |
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168 ReturnStmt(), |
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169 FunctionStmt(), |
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170 LocalFunctionStmt(), |
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171 BreakStmt(), |
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172 GenericForStmt(), |
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173 NumericForStmt(), |
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174 DoStmt(), |
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175 WhileStmt(), |
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176 RepeatStmt(), |
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177 IfStmt(), |
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178 SetStmt(), |
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179 ExpressionsStmt() |
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180 ), |
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181 stmts.get().add( (Stmt)pop() ) |
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182 ) |
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183 ); |
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184 } |
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185 |
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186 Rule ReturnStmt() { |
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187 return Sequence( |
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188 Keyword("return"), Expressions(), |
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189 push( new ReturnStmt( (Expressions)pop() ) ) |
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190 ); |
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191 } |
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192 |
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193 Rule FunctionStmt() { |
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194 return Sequence( |
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195 Keyword("function"), FnName(), Function(), |
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196 push( new SetStmt( (Settable)pop(1), expr(pop()) ) ) |
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197 ); |
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198 } |
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199 |
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200 Rule FnName() { |
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201 return Sequence( |
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202 push(null), // marker |
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203 Name(), |
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204 ZeroOrMore( |
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205 '.', Spaces(), |
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206 makeVarExp(), |
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207 NameExpr() |
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208 ), |
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209 makeSettableVar() |
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210 ); |
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211 } |
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212 |
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213 Rule LocalFunctionStmt() { |
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214 return Sequence( |
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215 Keyword("local"), Keyword("function"), |
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216 Name(), |
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217 addSymbol( (String)pop() ), |
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218 Function(), |
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219 push( new SetStmt( new SetLocalVar(symbolsSize()-1), expr(pop()) ) ) |
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220 ); |
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221 } |
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222 |
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223 Rule BreakStmt() { |
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224 return Sequence( |
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225 Keyword("break"), |
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226 frame.loops > 0, |
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227 push( new BreakStmt() ) |
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228 ); |
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229 } |
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230 |
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231 Rule GenericForStmt() { |
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232 Var<Integer> stackStart = new Var<Integer>(symbolsSize()); |
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233 Var<List<String>> names = new Var<List<String>>(new ArrayList<String>()); |
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234 return Sequence( |
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235 Keyword("for"), NameList(names), Keyword("in"), Expr(), Keyword("do"), |
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236 addSymbols(names.get()), |
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237 LoopBlock(), Keyword("end"), |
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238 push( new GenericForStmt( stackStart.get(), symbolsSize() - stackStart.get(), expr(pop(1)), (Stmt)pop() ) ), |
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239 popSymbols( symbolsSize() - stackStart.get() ) |
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240 ); |
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241 } |
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242 |
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243 Rule NumericForStmt() { |
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244 return Sequence( |
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245 Keyword("for"), Name(), '=', Spaces(), Expr(), ',', Spaces(), Expr(), |
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246 push( new ConstExpr(new LuaNumber(1)) ), // default step |
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247 Optional( |
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248 ',', Spaces(), |
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249 drop(), |
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250 Expr() |
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251 ), |
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252 addSymbol( (String)pop(3) ), // add "for" var to symbols |
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253 Keyword("do"), LoopBlock(), Keyword("end"), |
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254 push( new NumericForStmt( symbolsSize()-1, expr(pop(3)), expr(pop(2)), expr(pop(1)), (Stmt)pop() ) ), |
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255 popSymbols(1) |
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256 ); |
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257 } |
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258 |
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259 Rule DoStmt() { |
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260 return Sequence( |
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261 Keyword("do"), Block(), Keyword("end") |
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262 ); |
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263 } |
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264 |
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265 Rule LocalStmt(Var<List<Stmt>> stmts) { |
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266 Var<List<String>> names = new Var<List<String>>(new ArrayList<String>()); |
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267 return Sequence( |
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268 Keyword("local"), NameList(names), |
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269 Optional( |
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270 '=', Spaces(), ExpList(), |
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271 stmts.get().add( newSetLocalStmt(names.get().size()) ) |
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272 ), |
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273 addSymbols(names.get()) |
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274 ); |
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275 } |
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276 |
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277 Rule NameList(Var<List<String>> names) { |
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278 return Sequence( |
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279 Name(), |
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280 names.get().add( (String)pop() ), |
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281 ZeroOrMore( |
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282 ',', Spaces(), Name(), |
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283 names.get().add( (String)pop() ) |
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284 ) |
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285 ); |
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286 } |
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287 |
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288 SetStmt newSetLocalStmt(int nVars) { |
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289 Expressions values = (Expressions)pop(); |
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290 SetLocalVar[] vars = new SetLocalVar[nVars]; |
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291 int stackStart = symbolsSize(); |
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292 for( int i=0; i<vars.length; i++ ) { |
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293 vars[i] = new SetLocalVar(stackStart+i); |
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294 } |
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295 return new SetStmt( vars, values ); |
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296 } |
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297 |
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298 Rule WhileStmt() { |
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299 return Sequence( |
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300 Keyword("while"), Expr(), Keyword("do"), LoopBlock(), Keyword("end"), |
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301 push( new WhileStmt( expr(pop(1)), (Stmt)pop() ) ) |
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302 ); |
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303 } |
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304 |
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305 Rule RepeatStmt() { |
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306 return Sequence( |
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307 Keyword("repeat"), LoopBlock(), Keyword("until"), Expr(), |
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308 push( new RepeatStmt( (Stmt)pop(1), expr(pop()) ) ) |
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309 ); |
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310 } |
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311 |
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312 Rule LoopBlock() { |
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313 return Sequence( incLoops(), Block(), decLoops() ); |
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314 } |
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315 |
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316 Rule IfStmt() { |
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317 Var<Integer> n = new Var<Integer>(1); |
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318 return Sequence( |
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319 Keyword("if"), Expr(), Keyword("then"), Block(), |
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320 push(Stmt.EMPTY), |
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321 ZeroOrMore( |
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322 Keyword("elseif"), drop(), Expr(), Keyword("then"), Block(), |
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323 push(Stmt.EMPTY), |
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324 n.set(n.get()+1) |
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325 ), |
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326 Optional( |
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327 Keyword("else"), drop(), Block() |
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328 ), |
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329 Keyword("end"), |
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330 buildIfStmt(n.get()) |
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331 ); |
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332 } |
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333 |
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334 boolean buildIfStmt(int n) { |
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335 while( n-- > 0 ) { |
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336 Stmt elseStmt = (Stmt)pop(); |
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337 Stmt thenStmt = (Stmt)pop(); |
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338 Expr cnd = expr(pop()); |
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339 push( new IfStmt(cnd,thenStmt,elseStmt) ); |
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340 } |
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341 return true; |
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342 } |
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343 |
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344 Rule SetStmt() { |
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345 return Sequence( |
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346 VarList(), |
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347 '=', Spaces(), |
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348 ExpList(), |
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349 push( newSetStmt() ) |
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350 ); |
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351 } |
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352 |
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353 Rule ExpressionsStmt() { |
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354 return Sequence( |
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355 ExpList(), |
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356 push( new ExpressionsStmt((Expressions)pop()) ) |
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357 ); |
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358 } |
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359 |
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360 SetStmt newSetStmt() { |
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361 Expressions values = (Expressions)pop(); |
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362 @SuppressWarnings("unchecked") |
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363 List<Settable> vars = (List<Settable>)pop(); |
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364 return new SetStmt( vars.toArray(new Settable[0]), values ); |
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365 } |
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366 |
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367 Rule VarList() { |
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368 Var<List<Settable>> vars = new Var<List<Settable>>(new ArrayList<Settable>()); |
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369 return Sequence( |
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370 SettableVar(), |
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371 vars.get().add( (Settable)pop() ), |
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372 ZeroOrMore( |
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373 ',', Spaces(), SettableVar(), |
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374 vars.get().add( (Settable)pop() ) |
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375 ), |
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376 push(vars.get()) |
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377 ); |
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378 } |
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379 |
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380 Rule SettableVar() { |
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381 return Sequence( Var(), makeSettableVar() ); |
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382 } |
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383 |
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384 boolean makeSettableVar() { |
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385 Object obj2 = pop(); |
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386 if( obj2==null ) |
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387 return false; |
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388 Object obj1 = pop(); |
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389 if( obj1==null ) { |
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390 String name = (String)obj2; |
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391 int index = index(name); |
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392 if( index == -1 ) { |
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393 push( new SetTableEntry( EnvExpr.INSTANCE, new ConstExpr(name) ) ); |
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394 } else { |
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395 push( new SetLocalVar(index) ); |
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396 } |
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397 } else { |
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398 Expr key = expr(obj2); |
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399 Expr table = expr(obj1); |
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400 push( new SetTableEntry(table,key) ); |
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401 } |
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402 return true; |
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403 } |
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404 |
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405 Rule Expr() { |
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406 return FirstOf( |
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407 VarArgs(), |
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408 OrExpr() |
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409 ); |
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410 } |
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411 |
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412 Rule OrExpr() { |
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413 return Sequence( |
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414 AndExpr(), |
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415 ZeroOrMore( "or", Spaces(), AndExpr(), push( new OrExpr(expr(pop(1)),expr(pop())) ) ) |
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416 ); |
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417 } |
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418 |
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419 Rule AndExpr() { |
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420 return Sequence( |
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421 RelExpr(), |
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422 ZeroOrMore( "and", Spaces(), RelExpr(), push( new AndExpr(expr(pop(1)),expr(pop())) ) ) |
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423 ); |
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424 } |
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425 |
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426 Rule RelExpr() { |
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427 return Sequence( |
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428 ConcatExpr(), |
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429 ZeroOrMore( |
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430 FirstOf( |
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431 Sequence( "==", Spaces(), ConcatExpr(), push( new EqExpr(expr(pop(1)),expr(pop())) ) ), |
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432 Sequence( "~=", Spaces(), ConcatExpr(), push( new NotExpr(new EqExpr(expr(pop(1)),expr(pop()))) ) ), |
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433 Sequence( "<=", Spaces(), ConcatExpr(), push( new LeExpr(expr(pop(1)),expr(pop())) ) ), |
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434 Sequence( ">=", Spaces(), ConcatExpr(), push( new LeExpr(expr(pop()),expr(pop())) ) ), |
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435 Sequence( "<", Spaces(), ConcatExpr(), push( new LtExpr(expr(pop(1)),expr(pop())) ) ), |
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436 Sequence( ">", Spaces(), ConcatExpr(), push( new LtExpr(expr(pop()),expr(pop())) ) ) |
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437 ) |
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438 ) |
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439 ); |
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440 } |
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441 |
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442 Rule ConcatExpr() { |
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443 return Sequence( |
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444 SumExpr(), |
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445 Optional( "..", Spaces(), ConcatExpr(), push( new ConcatExpr(expr(pop(1)),expr(pop())) ) ) |
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446 ); |
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447 } |
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448 |
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449 Rule SumExpr() { |
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450 return Sequence( |
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451 TermExpr(), |
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452 ZeroOrMore( |
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453 FirstOf( |
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454 Sequence( '+', Spaces(), TermExpr(), push( new AddExpr(expr(pop(1)),expr(pop())) ) ), |
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455 Sequence( '-', TestNot('-'), Spaces(), TermExpr(), push( new SubExpr(expr(pop(1)),expr(pop())) ) ) |
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456 ) |
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457 ) |
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458 ); |
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459 } |
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460 |
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461 Rule TermExpr() { |
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462 return Sequence( |
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463 UnaryExpr(), |
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464 ZeroOrMore( |
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465 FirstOf( |
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466 Sequence( '*', Spaces(), UnaryExpr(), push( new MulExpr(expr(pop(1)),expr(pop())) ) ), |
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467 Sequence( '/', Spaces(), UnaryExpr(), push( new DivExpr(expr(pop(1)),expr(pop())) ) ), |
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468 Sequence( '%', Spaces(), UnaryExpr(), push( new ModExpr(expr(pop(1)),expr(pop())) ) ) |
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469 ) |
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470 ) |
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471 ); |
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472 } |
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473 |
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474 Rule UnaryExpr() { |
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475 return FirstOf( |
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476 Sequence( '#', Spaces(), PowExpr(), push( new LenExpr(expr(pop())) ) ), |
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477 Sequence( '-', TestNot('-'), Spaces(), PowExpr(), push( new UnmExpr(expr(pop())) ) ), |
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478 Sequence( "not", Spaces(), PowExpr(), push( new NotExpr(expr(pop())) ) ), |
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479 PowExpr() |
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480 ); |
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481 } |
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482 |
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483 Rule PowExpr() { |
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484 return Sequence( |
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485 SingleExpr(), |
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486 Optional( '^', Spaces(), PowExpr(), push( new PowExpr(expr(pop(1)),expr(pop())) ) ) |
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487 ); |
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488 } |
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489 |
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490 Rule SingleExpr() { |
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491 return FirstOf( |
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492 FunctionExpr(), |
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493 TableExpr(), |
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494 VarExp(), |
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495 LiteralExpr() |
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496 ); |
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497 } |
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498 |
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499 Rule FunctionExpr() { |
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500 return Sequence( "function", Spaces(), Function() ); |
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501 } |
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502 |
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503 Rule Function() { |
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504 Var<List<String>> names = new Var<List<String>>(new ArrayList<String>()); |
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505 return Sequence( |
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506 action( frame = new Frame(frame) ), |
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507 '(', incParens(), Spaces(), |
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508 Optional( |
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509 FirstOf( |
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510 Sequence( |
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511 NameList(names), addSymbols(names.get()), |
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512 Optional( ',', Spaces(), VarArgName() ) |
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513 ), |
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514 VarArgName() |
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515 ) |
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516 ), |
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517 ')', decParens(), Spaces(), Block(), Keyword("end"), |
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518 push( new Chunk( (Stmt)pop(), frame.stackSize, symbolsSize(), frame.isVarArg ) ), |
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519 action( frame = frame.parent ) |
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520 ); |
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521 } |
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522 |
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523 Rule VarArgName() { |
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524 return Sequence( |
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525 "...", Spaces(), |
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526 action( frame.isVarArg = true ) |
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527 ); |
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528 } |
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529 |
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530 Rule VarArgs() { |
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531 return Sequence( |
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532 "...", Spaces(), |
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533 frame.isVarArg, |
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534 push( VarArgs.INSTANCE ) |
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535 ); |
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536 } |
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537 |
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538 Rule TableExpr() { |
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539 Var<List<TableExpr.Field>> fields = new Var<List<TableExpr.Field>>(new ArrayList<TableExpr.Field>()); |
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540 Var<ExpList.Builder> builder = new Var<ExpList.Builder>(new ExpList.Builder()); |
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541 return Sequence( |
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542 '{', incParens(), Spaces(), |
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543 Optional( |
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544 Field(fields,builder), |
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545 ZeroOrMore( |
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546 FieldSep(), |
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547 Field(fields,builder) |
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548 ), |
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549 Optional( FieldSep() ) |
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550 ), |
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551 '}', decParens(), |
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552 Spaces(), |
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553 push( new TableExpr( fields.get().toArray(new TableExpr.Field[0]), builder.get().build() ) ) |
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554 ); |
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555 } |
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556 |
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557 Rule FieldSep() { |
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558 return Sequence( AnyOf(",;"), Spaces() ); |
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559 } |
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560 |
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561 Rule Field(Var<List<TableExpr.Field>> fields,Var<ExpList.Builder> builder) { |
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562 return FirstOf( |
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563 Sequence( |
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564 FirstOf( SubExpr(), NameExpr() ), |
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565 '=', Spaces(), Expr(), |
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566 fields.get().add( new TableExpr.Field( expr(pop(1)), expr(pop()) ) ) |
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567 ), |
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568 Sequence( |
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569 Expr(), |
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570 addToExpList(builder.get()) |
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571 ) |
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572 ); |
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573 } |
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574 |
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575 static Expr expr(Object obj) { |
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576 if( obj instanceof Expressions ) |
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577 return new ExpressionsExpr((Expressions)obj); |
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578 return (Expr)obj; |
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579 } |
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580 |
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581 Rule VarExp() { |
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582 return Sequence( |
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583 Var(), |
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584 makeVarExp() |
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585 ); |
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586 } |
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587 |
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588 Rule Var() { |
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589 return Sequence( |
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590 FirstOf( |
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591 Sequence( |
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592 '(', incParens(), Spaces(), Expr(), ')', decParens(), Spaces(), |
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593 push(expr(pop())), |
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594 push(null) // marker |
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595 ), |
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596 Sequence( |
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597 push(null), // marker |
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598 Name() |
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599 ) |
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600 ), |
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601 ZeroOrMore( |
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602 makeVarExp(), |
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603 FirstOf( |
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604 SubExpr(), |
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605 Sequence( '.', Spaces(), NameExpr() ), |
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606 Sequence( |
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607 Args(), |
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608 push(null) // marker |
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609 ) |
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610 ) |
9
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611 ) |
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612 ); |
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613 } |
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614 |
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615 boolean makeVarExp() { |
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616 Object obj2 = pop(); |
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617 if( obj2==null ) |
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618 return true; |
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619 Object obj1 = pop(); |
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620 if( obj1==null ) { |
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621 String name = (String)obj2; |
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622 int index = index(name); |
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623 if( index == -1 ) { |
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624 return push( new GetExpr( EnvExpr.INSTANCE, new ConstExpr(name) ) ); |
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625 } else { |
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626 return push( new GetLocalVar(index) ); |
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627 } |
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628 } |
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629 return push( new GetExpr( expr(obj1), expr(obj2) ) ); |
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630 } |
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631 |
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632 // function should be on top of the stack |
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633 Rule Args() { |
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634 return Sequence( |
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635 FirstOf( |
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636 Sequence( |
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637 '(', incParens(), Spaces(), Expressions(), ')', decParens(), Spaces() |
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638 ), |
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639 Sequence( |
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640 TableExpr(), |
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641 push( new ExpList.SingleExpList(expr(pop())) ) |
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642 ), |
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643 Sequence( |
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644 StringLiteral(), Spaces(), |
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645 push( new ExpList.SingleExpList(new ConstExpr(pop())) ) |
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646 ) |
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647 ), |
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648 push( new FnCall( expr(pop(1)), (Expressions)pop() ) ) |
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649 ); |
9
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650 } |
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651 |
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652 Rule Expressions() { |
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653 return FirstOf( |
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654 ExpList(), |
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655 push( ExpList.emptyExpList ) |
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656 ); |
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657 } |
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658 |
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659 Rule ExpList() { |
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660 Var<ExpList.Builder> builder = new Var<ExpList.Builder>(new ExpList.Builder()); |
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661 return Sequence( |
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662 Expr(), |
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663 addToExpList(builder.get()), |
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664 ZeroOrMore( |
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665 ',', Spaces(), Expr(), |
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666 addToExpList(builder.get()) |
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667 ), |
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668 push( builder.get().build() ) |
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669 ); |
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670 } |
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671 |
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672 boolean addToExpList(ExpList.Builder bld) { |
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673 Object obj = pop(); |
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674 if( obj instanceof Expressions ) { |
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675 bld.add( (Expressions)obj ); |
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676 } else { |
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677 bld.add( (Expr)obj ); |
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678 } |
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679 return true; |
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680 } |
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681 |
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682 Rule SubExpr() { |
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683 return Sequence( '[', incParens(), Spaces(), Expr(), ']', decParens(), Spaces() ); |
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684 } |
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685 |
17
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686 Rule NameExpr() { |
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687 return Sequence( |
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688 Name(), |
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689 push( new ConstExpr((String)pop()) ) |
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690 ); |
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691 } |
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692 |
9
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693 Rule Name() { |
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694 return Sequence( |
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695 Sequence( |
17
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696 NameFirstChar(), |
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697 ZeroOrMore( NameChar() ) |
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698 ), |
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699 !keywords.contains(match()), |
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700 push(match()), |
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701 Spaces() |
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702 ); |
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703 } |
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704 |
17
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705 Rule NameChar() { |
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706 return FirstOf( NameFirstChar(), Digit() ); |
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707 } |
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708 |
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709 Rule NameFirstChar() { |
9
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710 return FirstOf( |
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711 CharRange('a', 'z'), |
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712 CharRange('A', 'Z'), |
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713 '_' |
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714 ); |
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715 } |
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716 |
17
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717 Rule Keyword(String keyword) { |
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718 return Sequence( |
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719 keyword, |
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720 TestNot( NameChar() ), |
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721 Spaces() |
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722 ); |
12
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723 } |
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724 |
17
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725 static final Set<String> keywords = new HashSet<String>(Arrays.asList( |
12
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726 "and", |
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727 "break", |
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728 "do", |
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729 "else", |
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730 "elseif", |
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731 "end", |
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732 "false", |
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733 "for", |
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734 "function", |
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735 "goto", |
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736 "if", |
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737 "in", |
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738 "local", |
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739 "nil", |
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740 "not", |
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741 "or", |
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742 "repeat", |
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743 "return", |
9cea1aea5eef
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
11
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|
744 "then", |
9cea1aea5eef
CmdLine can run files
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
11
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changeset
|
745 "true", |
9cea1aea5eef
CmdLine can run files
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
11
diff
changeset
|
746 "until", |
9cea1aea5eef
CmdLine can run files
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
11
diff
changeset
|
747 "while" |
9cea1aea5eef
CmdLine can run files
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
11
diff
changeset
|
748 )); |
9cea1aea5eef
CmdLine can run files
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
11
diff
changeset
|
749 |
7
bca8fc5d928b
work on expressions
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
6
diff
changeset
|
750 Rule LiteralExpr() { |
bca8fc5d928b
work on expressions
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
6
diff
changeset
|
751 return Sequence( |
bca8fc5d928b
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
6
diff
changeset
|
752 Literal(), Spaces(), |
5
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parents:
diff
changeset
|
753 push(new ConstExpr(pop())) |
9ef0fd711101
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parents:
diff
changeset
|
754 ); |
9ef0fd711101
start LuaParser
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff
changeset
|
755 } |
9ef0fd711101
start LuaParser
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parents:
diff
changeset
|
756 |
7
bca8fc5d928b
work on expressions
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
6
diff
changeset
|
757 Rule Literal() { |
5
9ef0fd711101
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parents:
diff
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|
758 return FirstOf( |
7
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parents:
6
diff
changeset
|
759 NilLiteral(), |
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parents:
6
diff
changeset
|
760 BooleanLiteral(), |
bca8fc5d928b
work on expressions
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
6
diff
changeset
|
761 NumberLiteral(), |
bca8fc5d928b
work on expressions
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parents:
6
diff
changeset
|
762 StringLiteral() |
5
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parents:
diff
changeset
|
763 ); |
9ef0fd711101
start LuaParser
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parents:
diff
changeset
|
764 } |
9ef0fd711101
start LuaParser
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parents:
diff
changeset
|
765 |
7
bca8fc5d928b
work on expressions
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
6
diff
changeset
|
766 Rule NilLiteral() { |
bca8fc5d928b
work on expressions
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
6
diff
changeset
|
767 return Sequence( "nil", push(null) ); |
bca8fc5d928b
work on expressions
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
6
diff
changeset
|
768 } |
bca8fc5d928b
work on expressions
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
6
diff
changeset
|
769 |
bca8fc5d928b
work on expressions
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
6
diff
changeset
|
770 Rule BooleanLiteral() { |
bca8fc5d928b
work on expressions
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
6
diff
changeset
|
771 return FirstOf( |
bca8fc5d928b
work on expressions
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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diff
changeset
|
772 Sequence( "true", push(true) ), |
bca8fc5d928b
work on expressions
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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diff
changeset
|
773 Sequence( "false", push(false) ) |
5
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parents:
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changeset
|
774 ); |
9ef0fd711101
start LuaParser
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parents:
diff
changeset
|
775 } |
9ef0fd711101
start LuaParser
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff
changeset
|
776 |
7
bca8fc5d928b
work on expressions
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
6
diff
changeset
|
777 Rule NumberLiteral() { |
5
9ef0fd711101
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parents:
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|
778 return Sequence( |
6
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parents:
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|
779 Number(), |
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more parsing
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parents:
5
diff
changeset
|
780 push(new LuaNumber((Double)pop())) |
5
9ef0fd711101
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parents:
diff
changeset
|
781 ); |
9ef0fd711101
start LuaParser
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parents:
diff
changeset
|
782 } |
9ef0fd711101
start LuaParser
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff
changeset
|
783 |
6
a315783c9524
more parsing
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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diff
changeset
|
784 Rule Number() { |
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more parsing
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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|
785 return FirstOf( |
a315783c9524
more parsing
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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diff
changeset
|
786 Sequence( |
a315783c9524
more parsing
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parents:
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diff
changeset
|
787 IgnoreCase("0x"), |
16
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
15
diff
changeset
|
788 HexNumber() |
6
a315783c9524
more parsing
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parents:
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diff
changeset
|
789 ), |
a315783c9524
more parsing
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parents:
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|
790 Sequence( |
a315783c9524
more parsing
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parents:
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diff
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|
791 DecNumber(), |
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more parsing
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parents:
5
diff
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|
792 push(Double.parseDouble(match())) |
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parents:
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diff
changeset
|
793 ) |
5
9ef0fd711101
start LuaParser
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parents:
diff
changeset
|
794 ); |
9ef0fd711101
start LuaParser
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parents:
diff
changeset
|
795 } |
9ef0fd711101
start LuaParser
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parents:
diff
changeset
|
796 |
6
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parents:
5
diff
changeset
|
797 Rule DecNumber() { |
5
9ef0fd711101
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parents:
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|
798 return FirstOf( |
9ef0fd711101
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parents:
diff
changeset
|
799 Sequence( |
9ef0fd711101
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parents:
diff
changeset
|
800 Int(), |
7
bca8fc5d928b
work on expressions
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parents:
6
diff
changeset
|
801 Optional( '.', Optional(Int()) ), |
11
b7d7069fee58
add assignment statement and CmdLine
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parents:
9
diff
changeset
|
802 Exponent() |
5
9ef0fd711101
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parents:
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changeset
|
803 ), |
11
b7d7069fee58
add assignment statement and CmdLine
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
9
diff
changeset
|
804 Sequence( '.', Int(), Exponent() ) |
5
9ef0fd711101
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changeset
|
805 ); |
9ef0fd711101
start LuaParser
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parents:
diff
changeset
|
806 } |
9ef0fd711101
start LuaParser
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parents:
diff
changeset
|
807 |
11
b7d7069fee58
add assignment statement and CmdLine
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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diff
changeset
|
808 Rule Exponent() { |
5
9ef0fd711101
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changeset
|
809 return Optional( |
9ef0fd711101
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parents:
diff
changeset
|
810 IgnoreCase('e'), |
9ef0fd711101
start LuaParser
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parents:
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changeset
|
811 Optional(AnyOf("+-")), |
9ef0fd711101
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parents:
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changeset
|
812 Int() |
9ef0fd711101
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parents:
diff
changeset
|
813 ); |
9ef0fd711101
start LuaParser
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parents:
diff
changeset
|
814 } |
9ef0fd711101
start LuaParser
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parents:
diff
changeset
|
815 |
6
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|
816 Rule Int() { |
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817 return OneOrMore(Digit()); |
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|
818 } |
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changeset
|
819 |
16
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
15
diff
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|
820 Rule Digit() { |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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|
821 return CharRange('0', '9'); |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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diff
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|
822 } |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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diff
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|
823 |
2a30281ef47c
finish number literals;
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parents:
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diff
changeset
|
824 Rule HexNumber() { |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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|
825 return FirstOf( |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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diff
changeset
|
826 Sequence( |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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diff
changeset
|
827 HexInt(), |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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diff
changeset
|
828 push( (double)Long.parseLong(match(),16) ), |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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diff
changeset
|
829 Optional( '.', Optional(HexDec()) ), |
2a30281ef47c
finish number literals;
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parents:
15
diff
changeset
|
830 HexExponent() |
2a30281ef47c
finish number literals;
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parents:
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diff
changeset
|
831 ), |
2a30281ef47c
finish number literals;
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parents:
15
diff
changeset
|
832 Sequence( push(0.0), '.', HexDec(), HexExponent() ) |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
15
diff
changeset
|
833 ); |
2a30281ef47c
finish number literals;
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parents:
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diff
changeset
|
834 } |
2a30281ef47c
finish number literals;
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parents:
15
diff
changeset
|
835 |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
15
diff
changeset
|
836 Rule HexDec() { |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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diff
changeset
|
837 return Sequence( |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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diff
changeset
|
838 HexInt(), |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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diff
changeset
|
839 push( (Double)pop() + (double)Long.parseLong(match(),16) / Math.pow(16,matchLength()) ) |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
15
diff
changeset
|
840 ); |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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841 } |
2a30281ef47c
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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|
842 |
2a30281ef47c
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843 Rule HexExponent() { |
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844 return Optional( |
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845 IgnoreCase('p'), |
2a30281ef47c
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846 Sequence( |
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847 Optional(AnyOf("+-")), |
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848 HexInt() |
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849 ), |
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850 push( (Double)pop() * Math.pow(2,(double)Long.parseLong(match())) ) |
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851 ); |
2a30281ef47c
finish number literals;
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852 } |
2a30281ef47c
finish number literals;
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853 |
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finish number literals;
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parents:
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854 Rule HexInt() { |
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855 return OneOrMore(Digit()); |
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856 } |
2a30281ef47c
finish number literals;
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parents:
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|
857 |
2a30281ef47c
finish number literals;
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parents:
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858 |
6
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859 Rule HexDigit() { |
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860 return FirstOf( |
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861 Digit(), |
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862 AnyOf("abcdefABCDEF") |
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863 ); |
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864 } |
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865 |
7
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866 Rule StringLiteral() { |
6
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867 return FirstOf( |
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868 QuotedString('"'), |
16
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|
869 QuotedString('\''), |
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870 LongString() |
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|
871 ); |
2a30281ef47c
finish number literals;
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872 } |
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873 |
2a30281ef47c
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874 Rule LongString() { |
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875 return Sequence( |
17
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876 '[', |
16
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|
877 ZeroOrMore('='), |
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|
878 nEquals(matchLength()), |
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879 '[', |
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finish number literals;
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|
880 ZeroOrMore( |
2a30281ef47c
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881 TestNot(LongBracketsEnd()), |
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|
882 ANY |
2a30281ef47c
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|
883 ), |
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|
884 push( match() ), |
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|
885 LongBracketsEnd() |
6
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886 ); |
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|
887 } |
5
9ef0fd711101
start LuaParser
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|
888 |
6
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|
889 Rule QuotedString(char quote) { |
17
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|
890 StringBuilderVar buf = new StringBuilderVar(); |
6
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891 return Sequence( |
7
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|
892 quote, |
6
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893 ZeroOrMore( |
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894 FirstOf( |
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895 Sequence( |
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896 NoneOf("\\\n"+quote), |
17
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897 buf.append(matchedChar()) |
6
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|
898 ), |
17
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|
899 EscSeq(buf) |
6
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900 ) |
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|
901 ), |
7
bca8fc5d928b
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|
902 quote, |
17
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|
903 push( buf.getString() ) |
6
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904 ); |
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|
905 } |
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|
906 |
17
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907 Rule EscSeq(StringBuilderVar buf) { |
6
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|
908 return Sequence( |
7
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|
909 '\\', |
6
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|
910 FirstOf( |
17
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|
911 Sequence( 'a', buf.append('\u0007') ), |
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|
912 Sequence( 'b', buf.append('\b') ), |
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|
913 Sequence( 'f', buf.append('\f') ), |
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|
914 Sequence( 'n', buf.append('\n') ), |
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|
915 Sequence( 'r', buf.append('\r') ), |
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|
916 Sequence( 't', buf.append('\t') ), |
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parents:
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|
917 Sequence( 'v', buf.append('\u000b') ), |
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parents:
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|
918 Sequence( '\\', buf.append('\\') ), |
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parents:
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|
919 Sequence( '"', buf.append('"') ), |
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parents:
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diff
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|
920 Sequence( '\'', buf.append('\'') ), |
7
bca8fc5d928b
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|
921 Sequence( |
bca8fc5d928b
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|
922 'x', |
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|
923 Sequence( HexDigit(), HexDigit() ), |
17
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parents:
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|
924 buf.append( (char)Integer.parseInt(match(),16) ) |
7
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|
925 ), |
bca8fc5d928b
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|
926 Sequence( |
bca8fc5d928b
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|
927 Sequence( |
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|
928 Digit(), |
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|
929 Optional( |
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|
930 Digit(), |
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|
931 Optional( |
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932 Digit() |
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933 ) |
bca8fc5d928b
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934 ) |
bca8fc5d928b
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935 ), |
17
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936 buf.append( (char)Integer.parseInt(match()) ) |
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|
937 ) |
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938 ) |
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939 ); |
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940 } |
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941 |
12
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942 Rule Spaces() { |
14
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943 return ZeroOrMore( |
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944 FirstOf( |
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945 AnyOf(" \t"), |
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946 Comment(), |
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947 Sequence( '\\', EndOfLine() ), |
16
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948 Sequence( AnyOf("\r\n"), parens > 0 ) |
14
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949 ) |
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950 ); |
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951 } |
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952 |
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953 Rule Comment() { |
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954 return Sequence( |
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955 "--[", |
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956 ZeroOrMore('='), |
16
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|
957 nEquals(matchLength()), |
14
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958 '[', |
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959 ZeroOrMore( |
16
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960 TestNot(LongBracketsEnd()), |
14
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|
961 ANY |
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962 ), |
16
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963 LongBracketsEnd() |
14
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|
964 ); |
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965 } |
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966 |
16
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967 Rule LongBracketsEnd() { |
2a30281ef47c
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968 return Sequence( ']', ZeroOrMore('='), nEquals==matchLength(), ']' ); |
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969 } |
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970 |
18
3971113699b8
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971 static boolean action(Object obj) { |
3971113699b8
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972 return true; |
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973 } |
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974 |
12
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975 // for debugging |
14
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|
976 boolean print(Object o) { |
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|
977 System.out.println(o); |
12
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978 return true; |
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979 } |
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980 |
5
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981 // for testing |
9ef0fd711101
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982 public static void main(String[] args) throws Exception { |
9ef0fd711101
start LuaParser
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983 LuaParser parser = Parboiled.createParser(LuaParser.class); |
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984 while( true ) { |
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985 String input = new Scanner(System.in).nextLine(); |
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|
986 ParsingResult<?> result = new ReportingParseRunner(parser.Target()).run(input); |
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987 if( result.hasErrors() ) { |
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988 System.out.println("Parse Errors:\n" + ErrorUtils.printParseErrors(result)); |
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|
989 } else { |
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diff
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990 Expr expr = expr(result.resultValue); |
5
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991 LuaState lua = new LuaState(); |
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992 Object val = expr.eval(lua); |
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changeset
|
993 System.out.println("Result: "+Lua.toString(val)); |
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|
994 } |
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|
995 } |
9ef0fd711101
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|
996 } |
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997 } |