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|
%{
#include <stdint.h>
#include <stdio.h>
#include <bu/string.h>
typedef void *yyscan_t;
%}
%locations
%define api.pure
%debug
%error-verbose
%parse-param { yyscan_t yyscanner }
%lex-param { yysacn_t yyscanner }
%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, 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 tokFunction
%token tokSituation
%token tokSetup
%token tokEnter
%token tokWhile
%token tokFor
%token tokEach
%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"
%right tokNot
%right '=' tokPlusAssign tokMinusAssign tokTimesAssign tokDivideAssign
%right tokLtEq tokGtEq tokCmp
%left tokIn
%left '(' ')' '[' ']'
%left '*' '/'
%left '-' '+'
%%
input: gameDecl bodyDecl
;
gameDecl: tokGame '{' gameExprList '}'
;
gameExprList:
| gameExprList cmpltGameExpr
;
cmpltGameExpr: gameExpr ';'
| commandDecl
;
gameExpr: tokIdent '=' expr
;
bodyDecl:
| bodyDecl situation
| bodyDecl function
;
situation: tokSituation tokSituationName { printf("Read situtaion: %s\n", (*$2).getStr() ); } '{' situationMembers '}'
;
situationMembers:
| situationMembers situationModeFunc
| situationMembers commandDecl
;
situationModeFunc: situationMode '{' cmpltExprList '}'
;
situationMode: tokSetup
| tokEnter
;
function: tokFunction tokIdent '(' ')' '{' '}'
;
cmpltExprList:
| cmpltExprList cmpltExpr
;
cmpltExpr: expr ';'
| tokGoto '(' expr ')' ';'
| tokIf expr tokThen '{' cmpltExprList '}' ifnext
;
ifnext:
| tokElse '{' cmpltExprList '}'
| tokElse tokIf '{' cmpltExprList '}' ifnext
;
varRef: tokIdent
| tokPlayer '.' tokIdent
| tokSituation '.' tokIdent
;
expr: tokInt
| tokFloat
| tokString
| tokBool
| tokNull
| tokIdent '(' listValues ')'
| varRef
| varRef '=' expr
| varRef tokPlusAssign expr
| varRef tokMinusAssign expr
| varRef tokTimesAssign expr
| varRef tokDivideAssign expr
| tokSituationName
| expr '+' expr
| expr '-' expr
| expr '/' expr
| expr '*' expr
| expr tokIn expr
| '(' expr ')'
| expr '[' expr ']'
| '[' ']'
| '[' listValues ']'
| '{' '}'
| '{' dictValues '}'
| tokNot expr
;
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;
}
|
