Fix #12660 (Tokenizer::setVarId: varid is wrongly set for argument name that shadows method name) (#6347)

Author: danmar

lib/tokenize.cpp

@@ -99,6 +99,10 @@ const Token * Tokenizer::isFunctionHead(const Token *tok, const std::string &end
         return nullptr;
     if (tok->str() == "(")
         tok = tok->link();
+    if (tok->str() != ")")
+        return nullptr;
+    if (!tok->isCpp() && !Token::Match(tok->link()->previous(), "%name%|)"))
+        return nullptr;
     if (Token::Match(tok, ") ;|{|[")) {
         tok = tok->next();
         while (tok && tok->str() == "[" && tok->link()) {
@@ -131,7 +135,8 @@ const Token * Tokenizer::isFunctionHead(const Token *tok, const std::string &end
             tok = tok->next();
         if (Token::Match(tok, "= 0|default|delete ;"))
             tok = tok->tokAt(2);
-
+        if (tok && tok->str() == ":" && !Token::Match(tok->next(), "%name%|::"))
+            return nullptr;
         return (tok && endsWith.find(tok->str()) != std::string::npos) ? tok : nullptr;
     }
     return nullptr;

test/testvarid.cpp

@@ -101,6 +101,7 @@ class TestVarID : public TestFixture {
         TEST_CASE(varid67); // #11711 - NOT function pointer
         TEST_CASE(varid68); // #11740 - switch (str_chars(&strOut)[0])
         TEST_CASE(varid69);
+        TEST_CASE(varid70); // #12660 - function
         TEST_CASE(varid_for_1);
         TEST_CASE(varid_for_2);
         TEST_CASE(varid_cpp_keywords_in_c_code);
@@ -1270,6 +1271,29 @@ class TestVarID : public TestFixture {
         ASSERT_EQUALS(expected1, tokenize(code1, true));
     }
 
+    void varid70() {
+        // isFunctionHead
+        const char code1[] = "int x = 1 ? (1 << 0) : 0;\n"
+                             "void foo(bool init);\n"
+                             "void init();\n";
+        const char expected1[] = "1: int x@1 ; x@1 = 1 ? ( 1 << 0 ) : 0 ;\n"
+                                 "2: void foo ( bool init@2 ) ;\n"
+                                 "3: void init ( ) ;\n";
+        ASSERT_EQUALS(expected1, tokenize(code1, true));
+
+        const char code2[] = "int x = 1 ? f(1 << 0) : 0;\n"
+                             "void foo(bool init);\n"
+                             "void init();\n";
+        const char expected2[] = "1: int x@1 ; x@1 = 1 ? f ( 1 << 0 ) : 0 ;\n"
+                                 "2: void foo ( bool init@2 ) ;\n"
+                                 "3: void init ( ) ;\n";
+        ASSERT_EQUALS(expected2, tokenize(code2, true));
+
+        const char code3[] = "extern void (*arr[10])(uint32_t some);\n";
+        const char expected3[] = "1: extern void ( * arr@1 [ 10 ] ) ( uint32_t some@2 ) ;\n";
+        ASSERT_EQUALS(expected3, tokenize(code3, true));
+    }
+
     void varid_for_1() {
         const char code[] = "void foo(int a, int b) {\n"
                             "  for (int a=1,b=2;;) {}\n"