Fix #397 (Debracket macro not expanded) (#398)

Author: danmar

simplecpp.cpp

@@ -2046,13 +2046,19 @@ namespace simplecpp {
                     calledMacro.expand(&temp, loc, tok, macros, expandedmacros);
                     return recursiveExpandToken(output, temp, loc, tok, macros, expandedmacros2, parametertokens);
                 }
-                if (!sameline(tok, tok->next) || tok->next->op != '(') {
+                if (!sameline(tok, tok->next)) {
                     output->push_back(newMacroToken(tok->str(), loc, true, tok));
                     return tok->next;
                 }
                 TokenList tokens(files);
                 tokens.push_back(new Token(*tok));
-                const Token * const tok2 = appendTokens(&tokens, loc, tok->next, macros, expandedmacros, parametertokens);
+                const Token * tok2 = nullptr;
+                if (tok->next->op == '(')
+                    tok2 = appendTokens(&tokens, loc, tok->next, macros, expandedmacros, parametertokens);
+                else if (expandArg(&tokens, tok->next, loc, macros, expandedmacros, parametertokens)) {
+                    if (tokens.cfront()->next && tokens.cfront()->next->op == '(')
+                        tok2 = tok->next;
+                }
                 if (!tok2) {
                     output->push_back(newMacroToken(tok->str(), loc, true, tok));
                     return tok->next;

test.cpp

@@ -821,6 +821,20 @@ static void define_define_20() // #384 arg contains comma
     ASSERT_EQUALS("\n\n\n\n\n\na = 1", preprocess(code));
 }
 
+static void define_define_21() // #397 DEBRACKET macro
+{
+    const char code1[] = "#define A(val) B val\n"
+                         "#define B(val) val\n"
+                         "A((2))\n";
+    ASSERT_EQUALS("\n\n2", preprocess(code1));
+
+    const char code2[] = "#define x (2)\n"
+                         "#define A B x\n"
+                         "#define B(val) val\n"
+                         "A\n";
+    ASSERT_EQUALS("\n\n\nB ( 2 )", preprocess(code2));
+}
+
 static void define_va_args_1()
 {
     const char code[] = "#define A(fmt...) dostuff(fmt)\n"
@@ -2999,6 +3013,7 @@ int main(int argc, char **argv)
     TEST_CASE(define_define_18);
     TEST_CASE(define_define_19);
     TEST_CASE(define_define_20); // 384 arg contains comma
+    TEST_CASE(define_define_21);
     TEST_CASE(define_va_args_1);
     TEST_CASE(define_va_args_2);
     TEST_CASE(define_va_args_3);