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* An attribute set update operator (//). E.g.,

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{x=1; y=2; z=3;} // {y=4;}  =>  {x=1; y=4; z=3;}
This commit is contained in:
Eelco Dolstra 2004-02-04 16:49:51 +00:00
parent 6d46e647ba
commit 9d25466b34
3 changed files with 19 additions and 0 deletions
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2
src/libexpr/parser.y
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@ -42,6 +42,7 @@ void yyerror(YYLTYPE * loc, yyscan_t scanner, void * data, char * s)
%left OR
%left AND
%nonassoc EQ NEQ
%right UPDATE
%left NEG
%%
@ -69,6 +70,7 @@ expr_op
| expr_op AND expr_op { $$ = ATmake("OpAnd(<term>, <term>)", $1, $3); }
| expr_op OR expr_op { $$ = ATmake("OpOr(<term>, <term>)", $1, $3); }
| expr_op IMPL expr_op { $$ = ATmake("OpImpl(<term>, <term>)", $1, $3); }
| expr_op UPDATE expr_op { $$ = ATmake("OpUpdate(<term>, <term>)", $1, $3); }
| expr_app
;