Mercurial > lcfOS
view python/burg.x @ 321:8c569fbe60e4
Load yacc and burg dynamic
author | Windel Bouwman |
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date | Sun, 19 Jan 2014 18:48:45 +0100 |
parents | 8d07a4254f04 |
children | 44f336460c2a |
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%tokens ':' ';' '(' ')' ',' template id number '%%' '%terminal' %% burgdef: directives '%%' rules; directives: | directives directive; directive: termdef; termdef: '%terminal' termids; termids: | termids termid; termid: id { self.system.add_terminal($1.val) }; rules: | rules rule; rule: id ':' tree cost template { self.system.add_rule($1.val, $3, $4, $5.val) }; cost: number { return $1.val }; tree: id { return self.system.tree($1.val) } | id '(' tree ')' { return self.system.tree($1.val, $3) } | id '(' tree ',' tree ')' { return self.system.tree($1.val, $3, $5) };