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comparison test/expression.x @ 318:e84047f29c78

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Add burg and yacc initial attempts
author Windel Bouwman
date Tue, 31 Dec 2013 12:38:15 +0100
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317:e30a77ae359b 318:e84047f29c78
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2 %tokens '+' number '(' ')' '*'
3 %%
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5 input: expression {return $1};
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7 expression: term { return $1 }
8 | expression '+' term {};
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10 term: factor { return $1 }
11 | term '*' factor { return $1 * $3 };
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13 factor: '(' expression ')'
14 | number {return $1.val};
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