mirror of https://github.com/vitalif/lime
59 lines
1.7 KiB
Plaintext
59 lines
1.7 KiB
Plaintext
# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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# This is the grammar for all other grammar files that will work with the
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# Lime LALR(1) Context-Free Grammar Parser Generator.
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# You can read this to get an idea how things work, but this file is not
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# actually used in the system. Rather, it's an implementation guide for the
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# file "lime.bootstrap".
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%class lime_metaparser
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%start grammar
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grammar
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= {$$ = new lime();}
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| grammar/$ pragma/p toklist/t stop {$$->pragma($p, $t);}
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| grammar/$ rewrite/r stop {$r->update($$);}
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.
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rewrite
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= sym/s '=' rhs/r {$$ = new lime_rewrite($s); $$->add_rhs($r);}
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| rewrite/$ '|' rhs/r {$$->add_rhs($r);}
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.
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slot
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= action/a {$$ = new lime_action($a, NULL);}
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| action/a lambda/l {$$ = new lime_action($a, $l);}
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| sym/s {$$ = new lime_glyph($s, NULL);}
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| sym/s lambda/l {$$ = new lime_glyph($s, $l);}
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| lit/l {$$ = new lime_glyph($l, NULL);}
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.
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rhs
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= {$$ = new lime_rhs();}
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| rhs/$ slot/s {$$->add($s);}
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.
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action = '{' code/$ '}' .
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toklist = {$$=array();}
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| toklist/$ sym/s {$$[] = $s;}
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| toklist/$ lit/l {$$[] = $l;}
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.
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code = {}
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| code/$ php/p {$$.=$p;}
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| code/$ '{' code/c '}' {$$.='{'.$c.'}';}
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.
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