Mercurial Hosting > luan
annotate src/luan/interp/LuaParser.java @ 26:409871b33355
CmdLine varArgs
git-svn-id: https://luan-java.googlecode.com/svn/trunk@27 21e917c8-12df-6dd8-5cb6-c86387c605b9
author | fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9> |
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date | Thu, 06 Dec 2012 10:17:27 +0000 |
parents | 0e406bd9ac7b |
children | df923e5835b2 |
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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 int index(String name) { |
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73 List<String> symbols = frame.symbols; |
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74 int i = symbols.size(); |
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75 while( --i >= 0 ) { |
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76 if( symbols.get(i).equals(name) ) |
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77 return i; |
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78 } |
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79 return -1; |
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80 } |
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81 |
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82 boolean popSymbols(int n) { |
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83 List<String> symbols = frame.symbols; |
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84 while( n-- > 0 ) { |
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85 symbols.remove(symbols.size()-1); |
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86 } |
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87 return true; |
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88 } |
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89 |
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90 boolean incLoops() { |
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91 frame.loops++; |
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92 return true; |
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93 } |
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94 |
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95 boolean decLoops() { |
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96 frame.loops--; |
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97 return true; |
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98 } |
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99 |
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100 |
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101 public Rule Target() { |
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102 return Sequence( |
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103 Spaces(), |
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104 FirstOf( |
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105 Sequence( ExpList(), EOI ), |
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106 Sequence( |
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107 action( frame.isVarArg = true ), |
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108 Block(), |
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109 EOI, |
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110 push( new Chunk( (Stmt)pop(), frame.stackSize, 0, frame.isVarArg ) ) |
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111 ) |
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112 ) |
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113 ); |
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114 } |
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115 |
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116 Rule Block() { |
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117 Var<List<Stmt>> stmts = new Var<List<Stmt>>(new ArrayList<Stmt>()); |
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118 Var<Integer> stackStart = new Var<Integer>(symbolsSize()); |
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119 return Sequence( |
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120 Optional( Stmt(stmts) ), |
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121 ZeroOrMore( |
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122 StmtSep(), |
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123 Optional( Stmt(stmts) ) |
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124 ), |
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125 push( newBlock(stmts.get(),stackStart.get()) ) |
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126 ); |
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127 } |
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128 |
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129 Stmt newBlock(List<Stmt> stmts,int stackStart) { |
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130 int stackEnd = symbolsSize(); |
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131 popSymbols( stackEnd - stackStart ); |
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132 if( stmts.isEmpty() ) |
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133 return Stmt.EMPTY; |
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134 if( stmts.size()==1 && stackStart==stackEnd ) |
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135 return stmts.get(0); |
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136 return new Block( stmts.toArray(new Stmt[0]), stackStart, stackEnd ); |
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137 } |
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138 |
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139 Rule StmtSep() { |
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140 return Sequence( |
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141 FirstOf( |
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142 ';', |
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143 Sequence( |
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144 Optional( "--", ZeroOrMore(NoneOf("\r\n")) ), |
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145 EndOfLine() |
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146 ) |
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147 ), |
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148 Spaces() |
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149 ); |
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150 } |
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151 |
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152 Rule EndOfLine() { |
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153 return FirstOf("\r\n", '\r', '\n'); |
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154 } |
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155 |
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156 Rule Stmt(Var<List<Stmt>> stmts) { |
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157 return FirstOf( |
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158 LocalStmt(stmts), |
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159 Sequence( |
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160 FirstOf( |
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161 ReturnStmt(), |
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162 FunctionStmt(), |
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163 LocalFunctionStmt(), |
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164 BreakStmt(), |
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165 GenericForStmt(), |
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166 NumericForStmt(), |
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167 DoStmt(), |
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168 WhileStmt(), |
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169 RepeatStmt(), |
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170 IfStmt(), |
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171 SetStmt(), |
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172 ExpressionsStmt() |
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173 ), |
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174 stmts.get().add( (Stmt)pop() ) |
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175 ) |
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176 ); |
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177 } |
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178 |
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179 Rule ReturnStmt() { |
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180 return Sequence( |
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181 Keyword("return"), Expressions(), |
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182 push( new ReturnStmt( (Expressions)pop() ) ) |
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183 ); |
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184 } |
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185 |
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186 Rule FunctionStmt() { |
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187 return Sequence( |
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188 Keyword("function"), FnName(), Function(), |
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189 push( new SetStmt( (Settable)pop(1), expr(pop()) ) ) |
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190 ); |
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191 } |
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192 |
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193 Rule FnName() { |
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194 return Sequence( |
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195 push(null), // marker |
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196 Name(), |
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197 ZeroOrMore( |
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198 '.', Spaces(), |
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199 makeVarExp(), |
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200 NameExpr() |
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201 ), |
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202 makeSettableVar() |
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203 ); |
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204 } |
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205 |
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206 Rule LocalFunctionStmt() { |
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207 return Sequence( |
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208 Keyword("local"), Keyword("function"), LocalName(), Function(), |
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209 push( new SetStmt( new SetLocalVar(symbolsSize()-1), expr(pop()) ) ) |
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210 ); |
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211 } |
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212 |
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213 Rule BreakStmt() { |
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214 return Sequence( |
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215 Keyword("break"), |
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216 frame.loops > 0, |
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217 push( new BreakStmt() ) |
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218 ); |
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219 } |
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220 |
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221 Rule GenericForStmt() { |
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222 Var<Integer> stackStart = new Var<Integer>(symbolsSize()); |
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223 return Sequence( |
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224 Keyword("for"), NameList(), Keyword("in"), Expr(), Keyword("do"), LoopBlock(), Keyword("end"), |
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225 push( new GenericForStmt( stackStart.get(), symbolsSize() - stackStart.get(), expr(pop(1)), (Stmt)pop() ) ), |
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226 popSymbols( symbolsSize() - stackStart.get() ) |
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227 ); |
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228 } |
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229 |
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230 Rule NumericForStmt() { |
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231 return Sequence( |
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232 Keyword("for"), Name(), '=', Spaces(), Expr(), ',', Spaces(), Expr(), |
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233 push( new ConstExpr(new LuaNumber(1)) ), // default step |
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234 Optional( |
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235 ',', Spaces(), |
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236 drop(), |
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237 Expr() |
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238 ), |
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239 addSymbol( (String)pop(3) ), // add "for" var to symbols |
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240 Keyword("do"), LoopBlock(), Keyword("end"), |
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241 push( new NumericForStmt( symbolsSize()-1, expr(pop(3)), expr(pop(2)), expr(pop(1)), (Stmt)pop() ) ), |
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242 popSymbols(1) |
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243 ); |
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244 } |
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245 |
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246 Rule DoStmt() { |
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247 return Sequence( |
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248 Keyword("do"), Block(), Keyword("end") |
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249 ); |
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250 } |
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251 |
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252 Rule LocalStmt(Var<List<Stmt>> stmts) { |
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253 Var<Integer> stackStart = new Var<Integer>(symbolsSize()); |
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254 return Sequence( |
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255 Keyword("local"), NameList(), |
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256 Optional( |
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257 '=', Spaces(), ExpList(), |
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258 stmts.get().add( newSetLocalStmt(stackStart.get()) ) |
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259 ) |
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260 ); |
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261 } |
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262 |
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263 Rule NameList() { |
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264 return Sequence( |
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265 LocalName(), |
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266 ZeroOrMore( |
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267 ',', Spaces(), LocalName() |
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268 ) |
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269 ); |
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270 } |
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271 |
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272 Rule LocalName() { |
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273 return Sequence( |
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274 Name(), |
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275 addSymbol( (String)pop() ) |
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276 ); |
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277 } |
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278 |
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279 SetStmt newSetLocalStmt(int stackStart) { |
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280 Expressions values = (Expressions)pop(); |
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281 SetLocalVar[] vars = new SetLocalVar[symbolsSize()-stackStart]; |
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282 for( int i=0; i<vars.length; i++ ) { |
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283 vars[i] = new SetLocalVar(stackStart+i); |
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284 } |
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285 return new SetStmt( vars, values ); |
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286 } |
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287 |
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288 Rule WhileStmt() { |
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289 return Sequence( |
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290 Keyword("while"), Expr(), Keyword("do"), LoopBlock(), Keyword("end"), |
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291 push( new WhileStmt( expr(pop(1)), (Stmt)pop() ) ) |
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292 ); |
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293 } |
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294 |
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295 Rule RepeatStmt() { |
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296 return Sequence( |
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297 Keyword("repeat"), LoopBlock(), Keyword("until"), Expr(), |
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298 push( new RepeatStmt( (Stmt)pop(1), expr(pop()) ) ) |
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299 ); |
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300 } |
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301 |
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302 Rule LoopBlock() { |
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303 return Sequence( incLoops(), Block(), decLoops() ); |
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304 } |
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305 |
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306 Rule IfStmt() { |
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307 Var<Integer> n = new Var<Integer>(1); |
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308 return Sequence( |
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309 Keyword("if"), Expr(), Keyword("then"), Block(), |
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310 push(Stmt.EMPTY), |
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311 ZeroOrMore( |
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312 Keyword("elseif"), drop(), Expr(), Keyword("then"), Block(), |
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313 push(Stmt.EMPTY), |
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314 n.set(n.get()+1) |
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315 ), |
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316 Optional( |
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317 Keyword("else"), drop(), Block() |
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318 ), |
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319 Keyword("end"), |
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320 buildIfStmt(n.get()) |
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321 ); |
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322 } |
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323 |
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324 boolean buildIfStmt(int n) { |
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325 while( n-- > 0 ) { |
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326 Stmt elseStmt = (Stmt)pop(); |
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327 Stmt thenStmt = (Stmt)pop(); |
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328 Expr cnd = expr(pop()); |
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329 push( new IfStmt(cnd,thenStmt,elseStmt) ); |
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330 } |
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331 return true; |
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332 } |
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333 |
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334 Rule SetStmt() { |
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335 return Sequence( |
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336 VarList(), |
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337 '=', Spaces(), |
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338 ExpList(), |
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339 push( newSetStmt() ) |
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340 ); |
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341 } |
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342 |
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343 Rule ExpressionsStmt() { |
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344 return Sequence( |
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345 ExpList(), |
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346 push( new ExpressionsStmt((Expressions)pop()) ) |
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347 ); |
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348 } |
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349 |
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350 SetStmt newSetStmt() { |
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351 Expressions values = (Expressions)pop(); |
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352 @SuppressWarnings("unchecked") |
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353 List<Settable> vars = (List<Settable>)pop(); |
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354 return new SetStmt( vars.toArray(new Settable[0]), values ); |
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355 } |
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356 |
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357 Rule VarList() { |
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358 Var<List<Settable>> vars = new Var<List<Settable>>(new ArrayList<Settable>()); |
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359 return Sequence( |
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360 SettableVar(), |
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361 vars.get().add( (Settable)pop() ), |
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362 ZeroOrMore( |
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363 ',', Spaces(), SettableVar(), |
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364 vars.get().add( (Settable)pop() ) |
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365 ), |
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366 push(vars.get()) |
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367 ); |
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368 } |
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369 |
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370 Rule SettableVar() { |
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371 return Sequence( Var(), makeSettableVar() ); |
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372 } |
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373 |
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374 boolean makeSettableVar() { |
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375 Object obj2 = pop(); |
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376 if( obj2==null ) |
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377 return false; |
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378 Object obj1 = pop(); |
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379 if( obj1==null ) { |
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380 String name = (String)obj2; |
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381 int index = index(name); |
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382 if( index == -1 ) { |
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383 push( new SetTableEntry( EnvExpr.INSTANCE, new ConstExpr(name) ) ); |
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384 } else { |
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385 push( new SetLocalVar(index) ); |
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386 } |
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387 } else { |
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388 Expr key = expr(obj2); |
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389 Expr table = expr(obj1); |
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390 push( new SetTableEntry(table,key) ); |
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391 } |
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392 return true; |
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393 } |
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394 |
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395 Rule Expr() { |
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396 return FirstOf( |
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397 VarArgs(), |
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398 OrExpr() |
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399 ); |
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400 } |
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401 |
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402 Rule OrExpr() { |
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403 return Sequence( |
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404 AndExpr(), |
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405 ZeroOrMore( "or", Spaces(), AndExpr(), push( new OrExpr(expr(pop(1)),expr(pop())) ) ) |
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406 ); |
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407 } |
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408 |
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409 Rule AndExpr() { |
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410 return Sequence( |
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411 RelExpr(), |
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412 ZeroOrMore( "and", Spaces(), RelExpr(), push( new AndExpr(expr(pop(1)),expr(pop())) ) ) |
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413 ); |
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414 } |
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415 |
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416 Rule RelExpr() { |
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417 return Sequence( |
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418 ConcatExpr(), |
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419 ZeroOrMore( |
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420 FirstOf( |
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421 Sequence( "==", Spaces(), ConcatExpr(), push( new EqExpr(expr(pop(1)),expr(pop())) ) ), |
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422 Sequence( "~=", Spaces(), ConcatExpr(), push( new NotExpr(new EqExpr(expr(pop(1)),expr(pop()))) ) ), |
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423 Sequence( "<=", Spaces(), ConcatExpr(), push( new LeExpr(expr(pop(1)),expr(pop())) ) ), |
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424 Sequence( ">=", Spaces(), ConcatExpr(), push( new LeExpr(expr(pop()),expr(pop())) ) ), |
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425 Sequence( "<", Spaces(), ConcatExpr(), push( new LtExpr(expr(pop(1)),expr(pop())) ) ), |
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426 Sequence( ">", Spaces(), ConcatExpr(), push( new LtExpr(expr(pop()),expr(pop())) ) ) |
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427 ) |
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428 ) |
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429 ); |
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430 } |
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431 |
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432 Rule ConcatExpr() { |
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433 return Sequence( |
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434 SumExpr(), |
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435 Optional( "..", Spaces(), ConcatExpr(), push( new ConcatExpr(expr(pop(1)),expr(pop())) ) ) |
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436 ); |
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437 } |
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438 |
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439 Rule SumExpr() { |
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440 return Sequence( |
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441 TermExpr(), |
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442 ZeroOrMore( |
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443 FirstOf( |
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444 Sequence( '+', Spaces(), TermExpr(), push( new AddExpr(expr(pop(1)),expr(pop())) ) ), |
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445 Sequence( '-', TestNot('-'), Spaces(), TermExpr(), push( new SubExpr(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 } |
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450 |
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451 Rule TermExpr() { |
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452 return Sequence( |
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453 UnaryExpr(), |
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454 ZeroOrMore( |
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455 FirstOf( |
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456 Sequence( '*', Spaces(), UnaryExpr(), push( new MulExpr(expr(pop(1)),expr(pop())) ) ), |
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457 Sequence( '/', Spaces(), UnaryExpr(), push( new DivExpr(expr(pop(1)),expr(pop())) ) ), |
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458 Sequence( '%', Spaces(), UnaryExpr(), push( new ModExpr(expr(pop(1)),expr(pop())) ) ) |
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459 ) |
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460 ) |
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461 ); |
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462 } |
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463 |
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464 Rule UnaryExpr() { |
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465 return FirstOf( |
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466 Sequence( '#', Spaces(), PowExpr(), push( new LenExpr(expr(pop())) ) ), |
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467 Sequence( '-', TestNot('-'), Spaces(), PowExpr(), push( new UnmExpr(expr(pop())) ) ), |
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468 Sequence( "not", Spaces(), PowExpr(), push( new NotExpr(expr(pop())) ) ), |
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469 PowExpr() |
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470 ); |
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471 } |
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472 |
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473 Rule PowExpr() { |
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474 return Sequence( |
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475 SingleExpr(), |
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476 Optional( '^', Spaces(), PowExpr(), push( new PowExpr(expr(pop(1)),expr(pop())) ) ) |
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477 ); |
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478 } |
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479 |
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480 Rule SingleExpr() { |
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481 return FirstOf( |
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482 FunctionExpr(), |
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483 TableExpr(), |
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484 VarExp(), |
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485 LiteralExpr() |
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486 ); |
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487 } |
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488 |
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489 Rule FunctionExpr() { |
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490 return Sequence( "function", Spaces(), Function() ); |
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491 } |
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492 |
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493 Rule Function() { |
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494 return Sequence( |
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495 action( frame = new Frame(frame) ), |
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496 '(', incParens(), Spaces(), |
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497 Optional( |
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498 FirstOf( |
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499 Sequence( NameList(), Optional( ',', Spaces(), VarArgName() ) ), |
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500 VarArgName() |
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501 ) |
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502 ), |
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503 ')', decParens(), Spaces(), Block(), Keyword("end"), |
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504 push( new Chunk( (Stmt)pop(), frame.stackSize, symbolsSize(), frame.isVarArg ) ), |
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505 action( frame = frame.parent ) |
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506 ); |
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507 } |
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508 |
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509 Rule VarArgName() { |
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510 return Sequence( |
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511 "...", Spaces(), |
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512 action( frame.isVarArg = true ) |
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513 ); |
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514 } |
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515 |
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516 Rule VarArgs() { |
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517 return Sequence( |
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518 "...", Spaces(), |
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519 frame.isVarArg, |
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520 push( VarArgs.INSTANCE ) |
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521 ); |
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522 } |
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523 |
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524 Rule TableExpr() { |
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525 Var<List<TableExpr.Field>> fields = new Var<List<TableExpr.Field>>(new ArrayList<TableExpr.Field>()); |
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526 Var<ExpList.Builder> builder = new Var<ExpList.Builder>(new ExpList.Builder()); |
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527 return Sequence( |
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528 '{', incParens(), Spaces(), |
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529 Optional( |
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530 Field(fields,builder), |
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531 ZeroOrMore( |
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532 FieldSep(), |
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533 Field(fields,builder) |
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534 ), |
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535 Optional( FieldSep() ) |
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536 ), |
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537 '}', decParens(), |
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538 Spaces(), |
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539 push( new TableExpr( fields.get().toArray(new TableExpr.Field[0]), builder.get().build() ) ) |
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540 ); |
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541 } |
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542 |
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543 Rule FieldSep() { |
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544 return Sequence( AnyOf(",;"), Spaces() ); |
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545 } |
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546 |
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547 Rule Field(Var<List<TableExpr.Field>> fields,Var<ExpList.Builder> builder) { |
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548 return FirstOf( |
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549 Sequence( |
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550 FirstOf( SubExpr(), NameExpr() ), |
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551 '=', Spaces(), Expr(), |
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552 fields.get().add( new TableExpr.Field( expr(pop(1)), expr(pop()) ) ) |
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553 ), |
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554 Sequence( |
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555 Expr(), |
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556 addToExpList(builder.get()) |
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557 ) |
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558 ); |
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559 } |
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560 |
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561 static Expr expr(Object obj) { |
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562 if( obj instanceof Expressions ) |
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563 return new ExpressionsExpr((Expressions)obj); |
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564 return (Expr)obj; |
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565 } |
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566 |
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567 Rule VarExp() { |
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568 return Sequence( |
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569 Var(), |
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570 makeVarExp() |
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571 ); |
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572 } |
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573 |
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574 Rule Var() { |
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575 return Sequence( |
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576 FirstOf( |
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577 Sequence( |
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578 '(', incParens(), Spaces(), Expr(), ')', decParens(), Spaces(), |
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579 push(expr(pop())), |
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580 push(null) // marker |
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581 ), |
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582 Sequence( |
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583 push(null), // marker |
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584 Name() |
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585 ) |
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586 ), |
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587 ZeroOrMore( |
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588 makeVarExp(), |
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589 FirstOf( |
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590 SubExpr(), |
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591 Sequence( '.', Spaces(), NameExpr() ), |
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592 Sequence( |
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593 Args(), |
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594 push(null) // marker |
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595 ) |
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596 ) |
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597 ) |
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598 ); |
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599 } |
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600 |
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601 boolean makeVarExp() { |
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602 Object obj2 = pop(); |
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603 if( obj2==null ) |
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604 return true; |
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605 Object obj1 = pop(); |
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606 if( obj1==null ) { |
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607 String name = (String)obj2; |
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608 int index = index(name); |
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609 if( index == -1 ) { |
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610 return push( new GetExpr( EnvExpr.INSTANCE, new ConstExpr(name) ) ); |
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611 } else { |
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612 return push( new GetLocalVar(index) ); |
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613 } |
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614 } |
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615 return push( new GetExpr( expr(obj1), expr(obj2) ) ); |
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616 } |
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617 |
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618 // function should be on top of the stack |
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619 Rule Args() { |
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620 return Sequence( |
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621 FirstOf( |
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622 Sequence( |
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623 '(', incParens(), Spaces(), Expressions(), ')', decParens(), Spaces() |
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624 ), |
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625 Sequence( |
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626 TableExpr(), |
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627 push( new ExpList.SingleExpList(expr(pop())) ) |
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628 ), |
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629 Sequence( |
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630 StringLiteral(), Spaces(), |
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631 push( new ExpList.SingleExpList(new ConstExpr(pop())) ) |
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632 ) |
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633 ), |
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634 push( new FnCall( expr(pop(1)), (Expressions)pop() ) ) |
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635 ); |
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636 } |
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637 |
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638 Rule Expressions() { |
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639 return FirstOf( |
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640 ExpList(), |
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641 push( ExpList.emptyExpList ) |
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642 ); |
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643 } |
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644 |
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645 Rule ExpList() { |
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646 Var<ExpList.Builder> builder = new Var<ExpList.Builder>(new ExpList.Builder()); |
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647 return Sequence( |
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648 Expr(), |
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649 addToExpList(builder.get()), |
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650 ZeroOrMore( |
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651 ',', Spaces(), Expr(), |
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652 addToExpList(builder.get()) |
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653 ), |
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654 push( builder.get().build() ) |
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655 ); |
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656 } |
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657 |
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658 boolean addToExpList(ExpList.Builder bld) { |
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659 Object obj = pop(); |
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660 if( obj instanceof Expressions ) { |
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661 bld.add( (Expressions)obj ); |
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662 } else { |
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663 bld.add( (Expr)obj ); |
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664 } |
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665 return true; |
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666 } |
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667 |
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668 Rule SubExpr() { |
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669 return Sequence( '[', incParens(), Spaces(), Expr(), ']', decParens(), Spaces() ); |
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670 } |
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671 |
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672 Rule NameExpr() { |
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673 return Sequence( |
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674 Name(), |
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675 push( new ConstExpr((String)pop()) ) |
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676 ); |
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677 } |
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678 |
9
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679 Rule Name() { |
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680 return Sequence( |
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681 Sequence( |
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682 NameFirstChar(), |
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683 ZeroOrMore( NameChar() ) |
9
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684 ), |
17
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685 !keywords.contains(match()), |
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686 push(match()), |
9
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687 Spaces() |
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688 ); |
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689 } |
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690 |
17
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691 Rule NameChar() { |
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692 return FirstOf( NameFirstChar(), Digit() ); |
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693 } |
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694 |
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695 Rule NameFirstChar() { |
9
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696 return FirstOf( |
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697 CharRange('a', 'z'), |
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698 CharRange('A', 'Z'), |
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699 '_' |
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|
700 ); |
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701 } |
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702 |
17
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703 Rule Keyword(String keyword) { |
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704 return Sequence( |
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705 keyword, |
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706 TestNot( NameChar() ), |
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707 Spaces() |
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708 ); |
12
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709 } |
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|
710 |
17
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711 static final Set<String> keywords = new HashSet<String>(Arrays.asList( |
12
9cea1aea5eef
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712 "and", |
9cea1aea5eef
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713 "break", |
9cea1aea5eef
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714 "do", |
9cea1aea5eef
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715 "else", |
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716 "elseif", |
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|
717 "end", |
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718 "false", |
9cea1aea5eef
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|
719 "for", |
9cea1aea5eef
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|
720 "function", |
9cea1aea5eef
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721 "goto", |
9cea1aea5eef
CmdLine can run files
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722 "if", |
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|
723 "in", |
9cea1aea5eef
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724 "local", |
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|
725 "nil", |
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726 "not", |
9cea1aea5eef
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727 "or", |
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|
728 "repeat", |
9cea1aea5eef
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|
729 "return", |
9cea1aea5eef
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changeset
|
730 "then", |
9cea1aea5eef
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|
731 "true", |
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changeset
|
732 "until", |
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|
733 "while" |
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|
734 )); |
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changeset
|
735 |
7
bca8fc5d928b
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|
736 Rule LiteralExpr() { |
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|
737 return Sequence( |
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|
738 Literal(), Spaces(), |
5
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|
739 push(new ConstExpr(pop())) |
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|
740 ); |
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741 } |
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changeset
|
742 |
7
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|
743 Rule Literal() { |
5
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|
744 return FirstOf( |
7
bca8fc5d928b
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
6
diff
changeset
|
745 NilLiteral(), |
bca8fc5d928b
work on expressions
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
6
diff
changeset
|
746 BooleanLiteral(), |
bca8fc5d928b
work on expressions
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
6
diff
changeset
|
747 NumberLiteral(), |
bca8fc5d928b
work on expressions
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
6
diff
changeset
|
748 StringLiteral() |
5
9ef0fd711101
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parents:
diff
changeset
|
749 ); |
9ef0fd711101
start LuaParser
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parents:
diff
changeset
|
750 } |
9ef0fd711101
start LuaParser
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff
changeset
|
751 |
7
bca8fc5d928b
work on expressions
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
6
diff
changeset
|
752 Rule NilLiteral() { |
bca8fc5d928b
work on expressions
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
6
diff
changeset
|
753 return Sequence( "nil", push(null) ); |
bca8fc5d928b
work on expressions
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
6
diff
changeset
|
754 } |
bca8fc5d928b
work on expressions
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
6
diff
changeset
|
755 |
bca8fc5d928b
work on expressions
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
6
diff
changeset
|
756 Rule BooleanLiteral() { |
bca8fc5d928b
work on expressions
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
6
diff
changeset
|
757 return FirstOf( |
bca8fc5d928b
work on expressions
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
6
diff
changeset
|
758 Sequence( "true", push(true) ), |
bca8fc5d928b
work on expressions
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
6
diff
changeset
|
759 Sequence( "false", push(false) ) |
5
9ef0fd711101
start LuaParser
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parents:
diff
changeset
|
760 ); |
9ef0fd711101
start LuaParser
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff
changeset
|
761 } |
9ef0fd711101
start LuaParser
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff
changeset
|
762 |
7
bca8fc5d928b
work on expressions
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
6
diff
changeset
|
763 Rule NumberLiteral() { |
5
9ef0fd711101
start LuaParser
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff
changeset
|
764 return Sequence( |
6
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parents:
5
diff
changeset
|
765 Number(), |
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parents:
5
diff
changeset
|
766 push(new LuaNumber((Double)pop())) |
5
9ef0fd711101
start LuaParser
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff
changeset
|
767 ); |
9ef0fd711101
start LuaParser
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff
changeset
|
768 } |
9ef0fd711101
start LuaParser
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff
changeset
|
769 |
6
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more parsing
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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diff
changeset
|
770 Rule Number() { |
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more parsing
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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diff
changeset
|
771 return FirstOf( |
a315783c9524
more parsing
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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diff
changeset
|
772 Sequence( |
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more parsing
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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diff
changeset
|
773 IgnoreCase("0x"), |
16
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
15
diff
changeset
|
774 HexNumber() |
6
a315783c9524
more parsing
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
5
diff
changeset
|
775 ), |
a315783c9524
more parsing
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
5
diff
changeset
|
776 Sequence( |
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more parsing
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
5
diff
changeset
|
777 DecNumber(), |
a315783c9524
more parsing
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parents:
5
diff
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|
778 push(Double.parseDouble(match())) |
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more parsing
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parents:
5
diff
changeset
|
779 ) |
5
9ef0fd711101
start LuaParser
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff
changeset
|
780 ); |
9ef0fd711101
start LuaParser
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff
changeset
|
781 } |
9ef0fd711101
start LuaParser
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff
changeset
|
782 |
6
a315783c9524
more parsing
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
5
diff
changeset
|
783 Rule DecNumber() { |
5
9ef0fd711101
start LuaParser
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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changeset
|
784 return FirstOf( |
9ef0fd711101
start LuaParser
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff
changeset
|
785 Sequence( |
9ef0fd711101
start LuaParser
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff
changeset
|
786 Int(), |
7
bca8fc5d928b
work on expressions
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
6
diff
changeset
|
787 Optional( '.', Optional(Int()) ), |
11
b7d7069fee58
add assignment statement and CmdLine
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
9
diff
changeset
|
788 Exponent() |
5
9ef0fd711101
start LuaParser
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff
changeset
|
789 ), |
11
b7d7069fee58
add assignment statement and CmdLine
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
9
diff
changeset
|
790 Sequence( '.', Int(), Exponent() ) |
5
9ef0fd711101
start LuaParser
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff
changeset
|
791 ); |
9ef0fd711101
start LuaParser
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff
changeset
|
792 } |
9ef0fd711101
start LuaParser
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff
changeset
|
793 |
11
b7d7069fee58
add assignment statement and CmdLine
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
9
diff
changeset
|
794 Rule Exponent() { |
5
9ef0fd711101
start LuaParser
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff
changeset
|
795 return Optional( |
9ef0fd711101
start LuaParser
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff
changeset
|
796 IgnoreCase('e'), |
9ef0fd711101
start LuaParser
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff
changeset
|
797 Optional(AnyOf("+-")), |
9ef0fd711101
start LuaParser
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parents:
diff
changeset
|
798 Int() |
9ef0fd711101
start LuaParser
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parents:
diff
changeset
|
799 ); |
9ef0fd711101
start LuaParser
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff
changeset
|
800 } |
9ef0fd711101
start LuaParser
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff
changeset
|
801 |
6
a315783c9524
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parents:
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changeset
|
802 Rule Int() { |
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parents:
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changeset
|
803 return OneOrMore(Digit()); |
a315783c9524
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parents:
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changeset
|
804 } |
a315783c9524
more parsing
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parents:
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diff
changeset
|
805 |
16
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
15
diff
changeset
|
806 Rule Digit() { |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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diff
changeset
|
807 return CharRange('0', '9'); |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
15
diff
changeset
|
808 } |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
15
diff
changeset
|
809 |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
15
diff
changeset
|
810 Rule HexNumber() { |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
15
diff
changeset
|
811 return FirstOf( |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
15
diff
changeset
|
812 Sequence( |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
15
diff
changeset
|
813 HexInt(), |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
15
diff
changeset
|
814 push( (double)Long.parseLong(match(),16) ), |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
15
diff
changeset
|
815 Optional( '.', Optional(HexDec()) ), |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
15
diff
changeset
|
816 HexExponent() |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
15
diff
changeset
|
817 ), |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
15
diff
changeset
|
818 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
|
819 ); |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
15
diff
changeset
|
820 } |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
15
diff
changeset
|
821 |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
15
diff
changeset
|
822 Rule HexDec() { |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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diff
changeset
|
823 return Sequence( |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
15
diff
changeset
|
824 HexInt(), |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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diff
changeset
|
825 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
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|
826 ); |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
15
diff
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|
827 } |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
15
diff
changeset
|
828 |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
15
diff
changeset
|
829 Rule HexExponent() { |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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diff
changeset
|
830 return Optional( |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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diff
changeset
|
831 IgnoreCase('p'), |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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diff
changeset
|
832 Sequence( |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
15
diff
changeset
|
833 Optional(AnyOf("+-")), |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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diff
changeset
|
834 HexInt() |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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 push( (Double)pop() * Math.pow(2,(double)Long.parseLong(match())) ) |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
15
diff
changeset
|
837 ); |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
15
diff
changeset
|
838 } |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
15
diff
changeset
|
839 |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
15
diff
changeset
|
840 Rule HexInt() { |
2a30281ef47c
finish number literals;
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parents:
15
diff
changeset
|
841 return OneOrMore(Digit()); |
2a30281ef47c
finish number literals;
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842 } |
2a30281ef47c
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parents:
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843 |
2a30281ef47c
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844 |
6
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845 Rule HexDigit() { |
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846 return FirstOf( |
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847 Digit(), |
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848 AnyOf("abcdefABCDEF") |
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849 ); |
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850 } |
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851 |
7
bca8fc5d928b
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852 Rule StringLiteral() { |
6
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853 return FirstOf( |
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854 QuotedString('"'), |
16
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|
855 QuotedString('\''), |
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856 LongString() |
2a30281ef47c
finish number literals;
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|
857 ); |
2a30281ef47c
finish number literals;
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parents:
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858 } |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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859 |
2a30281ef47c
finish number literals;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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diff
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|
860 Rule LongString() { |
2a30281ef47c
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861 return Sequence( |
17
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|
862 '[', |
16
2a30281ef47c
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parents:
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863 ZeroOrMore('='), |
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finish number literals;
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864 nEquals(matchLength()), |
2a30281ef47c
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parents:
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865 '[', |
2a30281ef47c
finish number literals;
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866 ZeroOrMore( |
2a30281ef47c
finish number literals;
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|
867 TestNot(LongBracketsEnd()), |
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868 ANY |
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|
869 ), |
2a30281ef47c
finish number literals;
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870 push( match() ), |
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871 LongBracketsEnd() |
6
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872 ); |
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873 } |
5
9ef0fd711101
start LuaParser
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874 |
6
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875 Rule QuotedString(char quote) { |
17
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876 StringBuilderVar buf = new StringBuilderVar(); |
6
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877 return Sequence( |
7
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878 quote, |
6
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879 ZeroOrMore( |
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880 FirstOf( |
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881 Sequence( |
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882 NoneOf("\\\n"+quote), |
17
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883 buf.append(matchedChar()) |
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884 ), |
17
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|
885 EscSeq(buf) |
6
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886 ) |
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|
887 ), |
7
bca8fc5d928b
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diff
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|
888 quote, |
17
09d41f7490a8
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889 push( buf.getString() ) |
6
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890 ); |
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891 } |
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892 |
17
09d41f7490a8
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893 Rule EscSeq(StringBuilderVar buf) { |
6
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894 return Sequence( |
7
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895 '\\', |
6
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896 FirstOf( |
17
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897 Sequence( 'a', buf.append('\u0007') ), |
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898 Sequence( 'b', buf.append('\b') ), |
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|
899 Sequence( 'f', buf.append('\f') ), |
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|
900 Sequence( 'n', buf.append('\n') ), |
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parents:
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|
901 Sequence( 'r', buf.append('\r') ), |
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|
902 Sequence( 't', buf.append('\t') ), |
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903 Sequence( 'v', buf.append('\u000b') ), |
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diff
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|
904 Sequence( '\\', buf.append('\\') ), |
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|
905 Sequence( '"', buf.append('"') ), |
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parents:
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diff
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|
906 Sequence( '\'', buf.append('\'') ), |
7
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|
907 Sequence( |
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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|
908 'x', |
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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diff
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|
909 Sequence( HexDigit(), HexDigit() ), |
17
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add local variables
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diff
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|
910 buf.append( (char)Integer.parseInt(match(),16) ) |
7
bca8fc5d928b
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|
911 ), |
bca8fc5d928b
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|
912 Sequence( |
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|
913 Sequence( |
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diff
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|
914 Digit(), |
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diff
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|
915 Optional( |
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diff
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|
916 Digit(), |
bca8fc5d928b
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diff
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|
917 Optional( |
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diff
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|
918 Digit() |
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diff
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|
919 ) |
bca8fc5d928b
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|
920 ) |
bca8fc5d928b
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diff
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|
921 ), |
17
09d41f7490a8
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|
922 buf.append( (char)Integer.parseInt(match()) ) |
7
bca8fc5d928b
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923 ) |
6
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924 ) |
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925 ); |
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926 } |
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927 |
12
9cea1aea5eef
CmdLine can run files
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diff
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|
928 Rule Spaces() { |
14
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929 return ZeroOrMore( |
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whitespace handling;
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930 FirstOf( |
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|
931 AnyOf(" \t"), |
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932 Comment(), |
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|
933 Sequence( '\\', EndOfLine() ), |
16
2a30281ef47c
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934 Sequence( AnyOf("\r\n"), parens > 0 ) |
14
2ddf85634d20
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|
935 ) |
2ddf85634d20
whitespace handling;
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parents:
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|
936 ); |
2ddf85634d20
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937 } |
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938 |
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|
939 Rule Comment() { |
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940 return Sequence( |
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941 "--[", |
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942 ZeroOrMore('='), |
16
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943 nEquals(matchLength()), |
14
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944 '[', |
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945 ZeroOrMore( |
16
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946 TestNot(LongBracketsEnd()), |
14
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947 ANY |
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948 ), |
16
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949 LongBracketsEnd() |
14
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950 ); |
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951 } |
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952 |
16
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953 Rule LongBracketsEnd() { |
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954 return Sequence( ']', ZeroOrMore('='), nEquals==matchLength(), ']' ); |
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955 } |
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956 |
18
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957 static boolean action(Object obj) { |
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958 return true; |
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959 } |
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960 |
12
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961 // for debugging |
14
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962 boolean print(Object o) { |
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963 System.out.println(o); |
12
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964 return true; |
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965 } |
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966 |
5
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967 // for testing |
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968 public static void main(String[] args) throws Exception { |
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969 LuaParser parser = Parboiled.createParser(LuaParser.class); |
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970 while( true ) { |
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971 String input = new Scanner(System.in).nextLine(); |
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972 ParsingResult<?> result = new ReportingParseRunner(parser.Target()).run(input); |
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973 if( result.hasErrors() ) { |
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974 System.out.println("Parse Errors:\n" + ErrorUtils.printParseErrors(result)); |
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975 } else { |
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976 Expr expr = expr(result.resultValue); |
5
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977 LuaState lua = new LuaState(); |
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978 Object val = expr.eval(lua); |
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979 System.out.println("Result: "+Lua.toString(val)); |
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980 } |
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981 } |
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982 } |
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983 } |