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annotate python/burg.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
parents
children 8d07a4254f04
rev   line source
318
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2 from tree import Tree
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3 %tokens ':' ';' '(' ')' ',' template id number '%%' header
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5 %%
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7 rule: id ':' tree template cost { self.add_rule($1, $3, $4, $5) };
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9 cost: number { return number.val };
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11 tree: id { return Tree($1) }
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12 | id '(' tree ')' { return Tree($1, $3) }
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13 | id '(' tree ',' tree ')' { return Tree($1, $3, $5) };
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