Last change
on this file since 1 was
1,
checked in by lnalod, 15 years ago
|
Initial import of YAO sources
|
File size:
732 bytes
|
Rev | Line | |
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[1] | 1 | import java.io.*; |
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| 2 | import antlr.CommonAST; |
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| 3 | import antlr.collections.AST; |
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| 4 | import antlr.DumpASTVisitor; |
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| 5 | |
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| 6 | class Calc { |
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| 7 | public static void main(String[] args) { |
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| 8 | try { |
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| 9 | CalcLexer lexer = new CalcLexer(new DataInputStream(System.in)); |
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| 10 | CalcParser parser = new CalcParser(lexer); |
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| 11 | // Parse the input expression |
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| 12 | parser.expr(); |
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| 13 | CommonAST t = (CommonAST)parser.getAST(); |
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| 14 | // Print the resulting tree out in LISP notation |
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| 15 | System.out.println(t.toStringList()); |
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| 16 | CalcTreeWalker walker = new CalcTreeWalker(); |
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| 17 | // Traverse the tree created by the parser |
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| 18 | walker.expr(t); |
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| 19 | t = (CommonAST)walker.getAST(); |
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| 20 | System.out.println(t.toStringList()); |
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| 21 | } catch(Exception e) { |
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| 22 | System.err.println("exception: "+e); |
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| 23 | } |
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| 24 | } |
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| 25 | } |
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