add asm statements/expressions

src/main.cc

@@ -48,7 +48,7 @@ int main(int argc, char * argv[])
     /* Clean up temporary files. */
     if (preprocessed_fname_created)
     {
-        unlink(preprocessed_fname);
+        //unlink(preprocessed_fname);
     }
 
     return 0;

src/parser/parser.l

@@ -123,6 +123,8 @@ sizeof              return SIZEOF;
 
 __attribute__       return ATTRIBUTE;
 __restrict          return RESTRICT;
+asm                 return ASM;
+__asm__             return ASM;
 
 L?'[^\\]'           return CHAR_CONST;
 L?'\\.'             return CHAR_CONST;

src/parser/parser.yc

@@ -114,6 +114,7 @@ int yylex(YYSTYPE *, YYLTYPE *);
 %token TYPE_NAME;
 %token ATTRIBUTE;
 %token RESTRICT;
+%token ASM;
 
 %start translation_unit
 
@@ -516,6 +517,7 @@ statement
     | selection_statement
     | iteration_statement
     | jump_statement
+    | asm_statement
     ;
 
 labeled_statement
@@ -567,6 +569,29 @@ jump_statement
     | RETURN expression SEMICOLON
     ;
 
+asm_statement
+    : asm_expression SEMICOLON
+    ;
+
+asm_expression
+    : ASM LPAREN string_literals asm_operands RPAREN
+    ;
+
+asm_operands
+    :
+    | asm_operand
+    | asm_operands asm_operand
+    ;
+
+asm_operand
+    : COLON primary_expressions
+    ;
+
+primary_expressions
+    : primary_expression
+    | primary_expressions primary_expression
+    ;
+
 translation_unit
     : external_declaration
     | translation_unit external_declaration
@@ -588,6 +613,8 @@ attributes
     : { $$ = nullptr; }
     | attribute_spec
     | attributes attribute_spec
+    | asm_expression
+    | attributes asm_expression
     ;
 
 attribute_spec