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|
%{
#include <stdint.h>
#include <stdio.h>
#include <bu/string.h>
#include "gamebuilder.h"
#include "astnode.h"
typedef void *yyscan_t;
%}
%locations
%define api.pure
%debug
%error-verbose
%parse-param { yyscan_t yyscanner }
%lex-param { yysacn_t yyscanner }
%parse-param { GameBuilder &bld }
%union {
int64_t iValue;
double dValue;
Bu::String *sValue;
bool bValue;
}
%{
int yylex( YYSTYPE *yylval, struct YYLTYPE *llocp, yyscan_t yyscanner );
void yyerror( YYLTYPE *llocp, yyscan_t yyscanner, GameBuilder &, const char *error )
{
printf("%d:%d-%d:%d: %s\n",
llocp->first_line, llocp->first_column,
llocp->last_line, llocp->last_column, error
);
}
%}
%token tokGame
%token tokGlobal
%token tokFunction
%token tokSituation
%token tokSetup
%token tokEnter
%token tokAnd
%token tokOr
%token tokWhile
%token tokFor
%token tokEach
%token tokDo
%token tokIn
%token tokIf
%token tokThen
%token tokElse
%token tokNot
%token tokCommand
%token tokPlayer
%token tokLtEq
%token tokGtEq
%token tokCmp
%token tokPlusAssign
%token tokMinusAssign
%token tokTimesAssign
%token tokDivideAssign
%token <sValue> tokSituationName
%token <sValue> tokIdent
%token tokGoto
%token <sValue> tokString
%token <iValue> tokInt
%token <dValue> tokFloat
%token <bValue> tokBool
%token tokNull
%destructor { delete $$; printf("string deleted.\n"); } tokString tokSituationName
%token eos 0 "end of stream"
%left NOT
%right '=' tokPlusAssign tokMinusAssign tokTimesAssign tokDivideAssign
%left '-' '+'
%left '*' '/'
%left tokIn tokAnd tokOr
%right '<' '>' tokLtEq tokGtEq tokCmp
%left '(' ')' '[' ']'
%left NEG
%%
input: gameDecls globalDecl bodyDecl
;
gameDecls:
| gameDecls tokGame '.' tokIdent '=' literal ';' { bld.setGameParam( *($4) ); }
;
globalDecl:
| tokGlobal '{' globalExprList '}'
;
globalExprList:
| globalExprList cmpltGlobalExpr
;
cmpltGlobalExpr: globalExpr ';'
| commandDecl
;
globalExpr: tokIdent '=' expr
;
bodyDecl:
| bodyDecl situation
| bodyDecl function
;
situation: tokSituation tokSituationName { bld.beginSituation( *($2) ); } '{' situationMembers '}' { bld.endSituation(); }
;
situationMembers:
| situationMembers situationModeFunc
| situationMembers commandDecl
;
situationModeFunc: situationMode '{' cmpltExprList '}'
;
situationMode: tokSetup
| tokEnter
;
function: tokFunction tokIdent { bld.beginFunction( *($2) ); } '(' funcParamList ')' '{' cmpltExprList '}' { bld.endFunction(); }
;
funcParamList:
| tokIdent { bld.addParam( *($1) ); } funcParamListEx
;
funcParamListEx:
| funcParamListEx ',' tokIdent { bld.addParam( *($3) ); }
;
cmpltExprList:
| cmpltExprList cmpltExpr
;
cmpltExpr: expr ';'
| tokGoto '(' expr ')' ';'
| ifbase
| tokFor tokEach forIterator tokIn expr tokDo '{' cmpltExprList '}'
| tokWhile {
bld.addNode( AstNode::tWhile );
bld.addNode( AstNode::tScope );
} expr {
bld.closeNode();
bld.addNode( AstNode::tScope );
} tokDo '{' cmpltExprList '}' {
bld.closeNode(); bld.closeNode();
}
;
forIterator: tokIdent
| tokIdent ':' tokIdent
ifbase: tokIf {
bld.addNode( AstNode::tIf );
bld.addNode( AstNode::tScope );
} expr {
bld.closeNode();
bld.addNode( AstNode::tScope );
} tokThen '{' cmpltExprList '}' {
bld.closeNode();
} ifnext {
bld.closeNode();
}
;
ifnext:
| tokElse { bld.addNode( AstNode::tScope ); } '{' cmpltExprList '}' {
bld.closeNode();
}
| tokElse { bld.addNode( AstNode::tScope ); } ifbase
;
varRef: tokIdent { bld.addVarRef( *($1) ); }
| tokPlayer '.' tokIdent
| tokGlobal '.' tokIdent
| tokSituation '.' tokIdent
;
literal: tokInt { bld.addLiteral( Variable( $1 ) ); }
| tokFloat { bld.addLiteral( Variable( $1 ) ); }
| tokString { bld.addLiteral( Variable( *($1) ) ); }
| tokBool { bld.addLiteral( Variable( $1 ) ); }
| tokNull { bld.addLiteral( Variable( Variable::tNull ) ); }
| tokSituationName { bld.addLiteral( Variable::newSituationName( *($1) ) ); }
;
expr: literal
| tokIdent '(' listValues ')'
| varRef
| varRef '=' expr { bld.addNode( AstNode::tStore ); }
| varRef tokPlusAssign expr { bld.addNode( AstNode::tPlusStore ); }
| varRef tokMinusAssign expr { bld.addNode( AstNode::tMinusStore ); }
| varRef tokTimesAssign expr { bld.addNode( AstNode::tMultiplyStore ); }
| varRef tokDivideAssign expr { bld.addNode( AstNode::tDivideStore ); }
| expr '+' expr { bld.addNode( AstNode::tPlus ); }
| expr '-' expr { bld.addNode( AstNode::tMinus ); }
| expr '/' expr { bld.addNode( AstNode::tDivide ); }
| expr '*' expr { bld.addNode( AstNode::tMultiply ); }
| expr tokAnd expr { bld.addNode( AstNode::tAnd ); }
| expr tokOr expr { bld.addNode( AstNode::tOr ); }
| expr tokIn expr { bld.addNode( AstNode::tIn ); }
| expr tokCmp expr { bld.addNode( AstNode::tComp ); }
| expr '<' expr { bld.addNode( AstNode::tCompLt ); }
| expr '>' expr { bld.addNode( AstNode::tCompGt ); }
| expr tokLtEq expr { bld.addNode( AstNode::tCompLtEq ); }
| expr tokGtEq expr { bld.addNode( AstNode::tCompGtEq ); }
| '(' expr ')'
| expr '[' expr ']'
| '[' ']'
| '[' listValues ']'
| '{' '}'
| '{' dictValues '}'
| tokNot expr %prec NOT { bld.addNode( AstNode::tNot ); }
| '-' expr %prec NEG { bld.addNode( AstNode::tNegate ); }
;
listValues: expr
| listValues ',' expr
;
dictValues: expr ':' expr
| dictValues ',' expr ':' expr
;
commandDecl: tokCommand ':' tokString commandParamList '{' cmpltExprList '}'
;
commandParamList:
| commandParamList tokString
| commandParamList tokIdent
;
%%
/*
void yylex_init( yyscan_t * );
void yylex_destroy( yyscan_t );
int main()
{
yyscan_t scanner;
yylex_init ( &scanner );
yyparse( scanner );
yylex_destroy ( scanner );
return 0;
}
*/
|
