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Versions: 7
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Stored size: 1.71 KB
Contents
%%
spec
: declaration_list '%%' grammar EOF
{$$ = $1; $$.bnf = $3; return $$;}
| declaration_list '%%' grammar '%%' EOF
{$$ = $1; $$.bnf = $3; return $$;}
;
declaration_list
: declaration_list declaration
{$$ = $1; yy.addDeclaration($$, $2);}
|
<$$ = {};>
;
declaration
: START id
<$$ = {start: $2};>
| operator
<$$ = {operator: $1};>
;
operator
: associativity token_list
{$$ = [$1]; $$.push.apply($$, $2);}
;
associativity
: LEFT
{$$ = 'left';}
| RIGHT
{$$ = 'right';}
| NONASSOC
{$$ = 'nonassoc';}
;
token_list
: token_list symbol
{$$ = $1; $$.push($2);}
| symbol
{$$ = [$1];}
;
grammar
: production_list
{$$ = $1;}
;
production_list
: production_list production
{$$ = $1; $$[$2[0]] = $2[1];}
| production
<$$ = {}; $$[$1[0]] = $1[1];>
;
production
: id ':' handle_list ';'
{$$ = [$1, $3];}
;
handle_list
: handle_list '|' handle_action
{$$ = $1; $$.push($3);}
| handle_action
{$$ = [$1];}
;
handle_action
: handle action prec
{$$ = [($1.length ? $1.join(' ') : '')];
if($2) $$.push($2);
if($3) $$.push($3);
if ($$.length === 1) $$ = $$[0];
}
;
handle
: handle symbol
{$$ = $1; $$.push($2)}
|
{$$ = [];}
;
prec
: PREC symbol
<$$ = {prec: $2};>
|
{$$ = null;}
;
symbol
: id
{$$ = $1;}
| STRING
{$$ = yytext;}
;
id
: ID
{$$ = yytext;}
;
action
: ACTION
{$$ = yytext;}
|
{$$ = '';}
;
Version data entries
7 entries across 7 versions & 1 rubygems