diff options
Diffstat (limited to 'c_parser/src/c_parser.y')
| -rw-r--r-- | c_parser/src/c_parser.y | 28 |
1 files changed, 19 insertions, 9 deletions
diff --git a/c_parser/src/c_parser.y b/c_parser/src/c_parser.y index 9c65dfd..5b3af36 100644 --- a/c_parser/src/c_parser.y +++ b/c_parser/src/c_parser.y @@ -20,15 +20,15 @@ void yyerror(const char *); } %token T_TYPE_SPEC T_TYPE_QUAL T_STRG_SPEC T_IDENTIFIER -%token T_SC T_CMA T_EQ T_LRB T_RRB T_LCB T_RCB T_EQUALITY +%token T_SC T_CMA T_EQ T_LRB T_RRB T_LCB T_RCB T_EQUALITY T_RETURN %token T_INT_CONST %token T_IF T_ELSE %type <stmnt> EXT_DEF EXT_DECLARATION %type <stmnt> FUNC_DEF PARAMETER_LIST PARAMETER PARAM_DECLARATOR %type <stmnt> DECLARATION_LIST DECLARATION DECLARATION_SPEC DECLARATION_SPEC_T INIT_DECLARATOR INIT_DECLARATOR_LIST DECLARATOR INITIALIZER -%type <stmnt> STATEMENT_LIST STATEMENT COMPOUND_STATEMENT COMPOUND_STATEMENT_2 SELECTION_STATEMENT -%type <stmnt> EXPRESSION EQUALITY_EXPRESSION +%type <stmnt> STATEMENT_LIST STATEMENT COMPOUND_STATEMENT COMPOUND_STATEMENT_2 SELECTION_STATEMENT SELECTION_STATEMENT_2 EXPRESSION_STATEMENT +%type <stmnt> EXPRESSION EQUALITY_EXPRESSION RETURN_EXPRESSION // %type <number> // T_CONSTANT %type <string> T_IDENTIFIER //T_OPERATOR @@ -103,7 +103,8 @@ STATEMENT_LIST : STATEMENT { $$ = new ast_StatementList($1); } ; STATEMENT : COMPOUND_STATEMENT { $$ = $1; } - | SELECTION_STATEMENT { ; } + | SELECTION_STATEMENT { $$ = $1; } + | EXPRESSION_STATEMENT { $$ = $1; } ; COMPOUND_STATEMENT : T_LCB COMPOUND_STATEMENT_2 { $$ = $2; } @@ -115,17 +116,26 @@ COMPOUND_STATEMENT_2 : T_RCB { $$ = new ast_CompoundStatement; } | STATEMENT_LIST T_RCB { $$ = new ast_CompoundStatement($1); } ; -SELECTION_STATEMENT : T_IF T_LRB EXPRESSION T_RRB STATEMENT SELECTION_STATEMENT_2 { ; } +SELECTION_STATEMENT : T_IF T_LRB EXPRESSION T_RRB STATEMENT SELECTION_STATEMENT_2 { $$ = new ast_SelectionStatement($5, $6); } +; + +SELECTION_STATEMENT_2 : %empty { $$ = new ast_SelectionStatement(); } + | T_ELSE STATEMENT { $$ = $2; } +; -SELECTION_STATEMENT_2 : %empty { ; } - | T_ELSE STATEMENT { ; } +EXPRESSION_STATEMENT : EXPRESSION T_SC { $$ = $1; } +; // Expressions -EXPRESSION : EQUALITY_EXPRESSION { ; } +EXPRESSION : EQUALITY_EXPRESSION { $$ = $1; } + | RETURN_EXPRESSION { $$ = $1; } +; + +EQUALITY_EXPRESSION : T_IDENTIFIER T_EQUALITY T_IDENTIFIER { $$ = new ast_Variable(*$1); } ; -EQUALITY_EXPRESSION : T_IDENTIFIER T_EQUALITY T_IDENTIFIER { ; } +RETURN_EXPRESSION : T_RETURN T_IDENTIFIER { $$ = new ast_ReturnExpression(*$2); } ; %% |