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|
%{
#include <stdio.h>
#include "ast.h"
%}
%union {
int intval;
char *strval;
struct CNode *cnode;
}
%token IDENTIFIER INT_CONST CHAR_CONST STR_CONST
%token KW_VOID KW_CHAR KW_INT KW_STRUCT KW_UNION KW_IF KW_ELSE KW_WHILE
%token KW_FOR KW_CONT KW_BREAK KW_RET KW_SIZEOF
%token OPT_OR OPT_AND OPT_EQ OPT_NE OPT_LE OPT_GE OPT_SHL OPT_SHR OPT_INC OPT_DEC OPT_PTR
%token ASS_MUL ASS_DIV ASS_MOD ASS_ADD ASS_SUB ASS_SHL ASS_SHR ASS_AND ASS_XOR ASS_OR
%token UNKNOWN
%type<intval> INT_CONST CHAR_CONST
%type<strval> IDENTIFIER STR_CONST
%type<intval> assignment_operator equality_operator relational_operator shift_operator additive_operator multiplicative_operator unary_operator
%type<cnode> expression assignment_expression constant_expression
%type<cnode> logical_or_expression logical_and_expression inclusive_or_expression exclusive_or_expression and_expression equality_expression relational_expression shift_expression additive_expression multiplicative_expression cast_expression type_name
%type<cnode>unary_expression postfix_expression identifier primary_expression arguments postfix type_specifier
%%
debug_top
: expression { ast_root = $1; }
expression
: assignment_expression
| expression ',' assignment_expression { $$ = cnode_create_exp(',', 2, $1, $3); }
assignment_expression
: logical_or_expression
| unary_expression assignment_operator assignment_expression { $$ = cnode_create_exp($2, 2, $1, $3); }
assignment_operator
: '=' { $$ = '='; }
| ASS_MUL { $$ = ASS_MUL; }
| ASS_DIV { $$ = ASS_DIV; }
| ASS_MOD { $$ = ASS_MOD; }
| ASS_ADD { $$ = ASS_ADD; }
| ASS_SUB { $$ = ASS_SUB; }
| ASS_SHL { $$ = ASS_SHL; }
| ASS_SHR { $$ = ASS_SHR; }
| ASS_AND { $$ = ASS_AND; }
| ASS_XOR { $$ = ASS_XOR; }
| ASS_OR { $$ = ASS_OR; }
constant_expression: logical_or_expression
logical_or_expression
: logical_and_expression
| logical_or_expression OPT_OR logical_and_expression { $$ = cnode_create_exp(OPT_OR, 2, $1, $3); }
logical_and_expression
: inclusive_or_expression
| logical_and_expression OPT_AND inclusive_or_expression { $$ = cnode_create_exp(OPT_AND, 2, $1, $3); }
inclusive_or_expression
: exclusive_or_expression
| inclusive_or_expression '|' exclusive_or_expression { $$ = cnode_create_exp('|', 2, $1, $3); }
exclusive_or_expression
: and_expression
| exclusive_or_expression '^' and_expression { $$ = cnode_create_exp('^', 2, $1, $3); }
and_expression
: equality_expression
| and_expression '&' equality_expression { $$ = cnode_create_exp('&', 2, $1, $3); }
equality_expression
: relational_expression
| equality_expression equality_operator relational_expression { $$ = cnode_create_exp($2, 2, $1, $3); }
equality_operator
: OPT_EQ { $$ = OPT_EQ; }
| OPT_NE { $$ = OPT_NE; }
relational_expression
: shift_expression
| relational_expression relational_operator shift_expression { $$ = cnode_create_exp($2, 2, $1, $3); }
relational_operator
: '<' { $$ = '<'; }
| '>' { $$ = '>'; }
| OPT_LE { $$ = OPT_LE; }
| OPT_GE { $$ = OPT_GE; }
shift_expression
: additive_expression
| shift_expression shift_operator additive_expression { $$ = cnode_create_exp($2, 2, $1, $3); }
shift_operator
: OPT_SHL { $$ = OPT_SHL; }
| OPT_SHR { $$ = OPT_SHR; }
additive_expression
: multiplicative_expression
| additive_expression additive_operator multiplicative_expression { $$ = cnode_create_exp($2, 2, $1, $3); }
additive_operator
: '+' { $$ = '+'; }
| '-' { $$ = '-'; }
multiplicative_expression
: cast_expression
| multiplicative_expression multiplicative_operator cast_expression { $$ = cnode_create_exp($2, 2, $1, $3); }
multiplicative_operator
: '*' { $$ = '*'; }
| '/' { $$ = '/'; }
| '%' { $$ = '%'; }
cast_expression
: unary_expression
| '(' type_name ')' cast_expression { $$ = cnode_create_exp(EXP_CAST, 2, $2, $4); }
type_name
: type_specifier
| type_name '*' { $$ = cnode_create_exp('*', 1, $1); }
unary_expression
: postfix_expression
| OPT_INC unary_expression { $$ = cnode_create_exp(OPT_INC, 1, $2); }
| OPT_DEC unary_expression { $$ = cnode_create_exp(OPT_DEC, 1, $2); }
| unary_operator cast_expression { $$ = cnode_create_exp($1, 1, $2); }
| KW_SIZEOF unary_expression { $$ = cnode_create_exp(KW_SIZEOF, 1, $2); }
| KW_SIZEOF '(' type_name ')' { $$ = cnode_create_exp(KW_SIZEOF, 1, $3); }
unary_operator
: '&' { $$ = '&'; }
| '*' { $$ = '*'; }
| '+' { $$ = '+'; }
| '-' { $$ = '-'; }
| '~' { $$ = '~'; }
| '!' { $$ = '!'; }
postfix_expression
: primary_expression
| postfix_expression postfix { $$ = cnode_create_exp(EXP_POSTFIX, 2, $1, $2); }
postfix
: '[' expression ']' { $$ = cnode_create_exp(POSTFIX_ARR, 1, $2); }
| '(' arguments ')' { $$ = cnode_create_exp(POSTFIX_CALL, 1, $2); }
| '(' ')' { $$ = cnode_create_exp(POSTFIX_CALL, 1, NULL); }
| '.' identifier { $$ = cnode_create_exp(POSTFIX_DOT, 1, $2); }
| OPT_PTR identifier { $$ = cnode_create_exp(POSTFIX_PTR, 1, $2); }
| OPT_INC { $$ = cnode_create_exp(OPT_INC, 0); }
| OPT_DEC { $$ = cnode_create_exp(OPT_DEC, 0); }
arguments
: assignment_expression
| arguments ',' assignment_expression { $$ = cnode_append($1, $3); }
primary_expression
: identifier
| INT_CONST { $$ = cnode_create_int_const($1); }
| CHAR_CONST { $$ = cnode_create_char_const($1); }
| STR_CONST { $$ = cnode_create_str_const($1); }
| '(' expression ')' { $$ = $2; }
identifier
: IDENTIFIER { $$ = cnode_create_identifier($1); }
type_specifier
: KW_VOID { $$ = cnode_create_type_spec(KW_VOID, 0); }
| KW_CHAR { $$ = cnode_create_type_spec(KW_CHAR, 0); }
| KW_INT { $$ = cnode_create_type_spec(KW_INT, 0); }
/* to be continue */
%%
int yywrap() {
return 1;
}
int yyerror(char *s) {
}
extern FILE *yyin;
void test_ast() {
yyparse();
if (ast_root)
cnode_debug_print(ast_root);
else
fprintf(stderr, "Syntax Error\n");
}
int main() {
int ret;
yyin = fopen("in", "r");
test_ast();
return 0;
}
|