Fix #12733 FP constParameterReference with nested init list (#6406)

Author: chrchr-github

lib/tokenize.cpp

@@ -4611,8 +4611,9 @@ void Tokenizer::setVarIdPass1()
                         if (!(scopeStack.top().isStructInit || tok->strAt(-1) == "="))
                             variableMap.enterScope();
                     }
+                    const bool isStructInit = scopeStack.top().isStructInit || tok->strAt(-1) == "=" || (initlist && !Token::Match(tok->tokAt(-1), "[)}]"));
+                    scopeStack.emplace(isExecutable, isStructInit, isEnumStart(tok), variableMap.getVarId());
                     initlist = false;
-                    scopeStack.emplace(isExecutable, scopeStack.top().isStructInit || tok->strAt(-1) == "=", isEnumStart(tok), variableMap.getVarId());
                 } else { /* if (tok->str() == "}") */
                     bool isNamespace = false;
                     for (const Token *tok1 = tok->link()->previous(); tok1 && tok1->isName(); tok1 = tok1->previous()) {

test/testvarid.cpp

@@ -2520,6 +2520,16 @@ class TestVarID : public TestFixture {
                       "5: A :: A ( const Matrix & m@3 ) throw ( e ) : work@1 ( 0 )\n"
                       "6: { }\n",
                       tokenize(code10));
+
+        const char code11[] = "struct S {\n" // #12733
+                              "    explicit S(int& r) : a{ int{ 1 } }, b{ r } {}\n"
+                              "    int a, &b;\n"
+                              "};";
+        ASSERT_EQUALS("1: struct S {\n"
+                      "2: explicit S ( int & r@1 ) : a@2 { int { 1 } } , b@3 { r@1 } { }\n"
+                      "3: int a@2 ; int & b@3 ;\n"
+                      "4: } ;\n",
+                      tokenize(code11));
     }
 
     void varid_initListWithBaseTemplate() {