104 lines
1.6 KiB
Plaintext
104 lines
1.6 KiB
Plaintext
/* $XConsortium: OL_DataExpr.y /main/2 1996/11/11 11:51:54 drk $ */
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%{
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#include <stdio.h>
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#include "ExprList.h"
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#include "Expression.h"
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#include "ContentType.h"
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extern int yylex();
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extern void yyerror( char *str );
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extern ContentType *CurrentContentPtr;
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%}
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%union {
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int name;
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char *string;
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Expression *eptr;
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}
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%token <name> Reference
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%token <name> Id
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%token <string> Literal
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%token Content
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%token Concat
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%token Attr
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%token FirstOf
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%type <eptr> Expr
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%type <eptr> ExprList
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%start ValList
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%%
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ValList : ExprList
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{
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CurrentContentPtr->init($1);
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}
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;
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ExprList : Expr
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{
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$$ = $1;
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}
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| Expr ',' ExprList
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{
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$1->next = $3;
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$$ = $1;
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}
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;
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Expr : Id
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{
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Expression *expr = new Expression( GENERIC_ID, $1);
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$$ = expr;
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}
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| Content
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{
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Expression *expr = new Expression( CONTENT );
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$$ = expr;
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}
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| Concat '(' ExprList ')'
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{
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ExprList *elist = new ExprList( $3 );
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Expression *expr = new Expression( CONCAT, -1, elist);
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$$ = expr;
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}
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| Attr '(' Id ')'
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{
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Expression *expr = new Expression( REFERENCE, $3);
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$$ = expr;
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}
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| FirstOf '(' ExprList ')'
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{
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ExprList *elist = new ExprList ( $3 );
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Expression *expr = new Expression( FIRSTOF, -1, elist );
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$$ = expr;
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}
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| Literal
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{
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Expression *expr = new Expression( LITERAL, -1, $1 );
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$$ = expr;
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}
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| Reference
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{
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Expression *expr = new Expression( REFERENCE, $1 );
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$$ = expr;
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}
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;
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%%
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