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annotate test/expression.x @ 357:818be710e13d

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Added acceptance function to burg
author Windel Bouwman
date Fri, 14 Mar 2014 15:14:29 +0100
parents e84047f29c78
children
rev   line source
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e84047f29c78 Add burg and yacc initial attempts
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2 %tokens '+' number '(' ')' '*'
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3 %%
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5 input: expression {return $1};
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6
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7 expression: term { return $1 }
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8 | expression '+' term {};
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9
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10 term: factor { return $1 }
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11 | term '*' factor { return $1 * $3 };
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12
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13 factor: '(' expression ')'
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14 | number {return $1.val};
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