Refactoring: use init list, redundant init (#5552)

Author: chrchr-github

lib/checkclass.cpp

@@ -2586,8 +2586,7 @@ void CheckClass::checkConstError(const Token *tok, const std::string &classname,
 
 void CheckClass::checkConstError2(const Token *tok1, const Token *tok2, const std::string &classname, const std::string &funcname, bool suggestStatic)
 {
-    std::list<const Token *> toks;
-    toks.push_back(tok1);
+    std::list<const Token *> toks{ tok1 };
     if (tok2)
         toks.push_back(tok2);
     if (!suggestStatic)

lib/checkstl.cpp

@@ -2707,7 +2707,7 @@ namespace {
         const Token* bodyTok = nullptr;
         const Token* loopVar = nullptr;
         const Settings* settings = nullptr;
-        std::set<nonneg int> varsChanged = {};
+        std::set<nonneg int> varsChanged;
 
         explicit LoopAnalyzer(const Token* tok, const Settings* psettings)
             : bodyTok(tok->next()->link()->next()), settings(psettings)

lib/checkstring.cpp

@@ -73,8 +73,7 @@ void CheckString::stringLiteralWrite()
 
 void CheckString::stringLiteralWriteError(const Token *tok, const Token *strValue)
 {
-    std::list<const Token *> callstack;
-    callstack.push_back(tok);
+    std::list<const Token*> callstack{ tok };
     if (strValue)
         callstack.push_back(strValue);
 

lib/infer.cpp

@@ -49,10 +49,8 @@ static const ValueFlow::Value* getCompareValue(const std::list<ValueFlow::Value>
 }
 
 struct Interval {
-    std::vector<MathLib::bigint> minvalue = {};
-    std::vector<MathLib::bigint> maxvalue = {};
-    std::vector<const ValueFlow::Value*> minRef = {};
-    std::vector<const ValueFlow::Value*> maxRef = {};
+    std::vector<MathLib::bigint> minvalue, maxvalue;
+    std::vector<const ValueFlow::Value*> minRef, maxRef;
 
     std::string str() const
     {

lib/platform.cpp

@@ -193,11 +193,12 @@ bool Platform::loadFromFile(const char exename[], const std::string &filename, b
 {
     // TODO: only append .xml if missing
     // TODO: use native separators
-    std::vector<std::string> filenames;
-    filenames.push_back(filename);
-    filenames.push_back(filename + ".xml");
-    filenames.push_back("platforms/" + filename);
-    filenames.push_back("platforms/" + filename + ".xml");
+    std::vector<std::string> filenames{
+        filename,
+        filename + ".xml",
+        "platforms/" + filename,
+        "platforms/" + filename + ".xml"
+    };
     if (exename && (std::string::npos != Path::fromNativeSeparators(exename).find('/'))) {
         filenames.push_back(Path::getPathFromFilename(Path::fromNativeSeparators(exename)) + filename);
         filenames.push_back(Path::getPathFromFilename(Path::fromNativeSeparators(exename)) + "platforms/" + filename);

lib/tokenize.cpp

@@ -1131,15 +1131,13 @@ void Tokenizer::simplifyTypedef()
 
 void Tokenizer::simplifyTypedefCpp()
 {
-    std::vector<Space> spaceInfo;
     bool isNamespace = false;
-    std::string className;
-    std::string fullClassName;
+    std::string className, fullClassName;
     bool hasClass = false;
     bool goback = false;
 
     // add global namespace
-    spaceInfo.emplace_back(/*Space{}*/);
+    std::vector<Space> spaceInfo(1);
 
     // Convert "using a::b;" to corresponding typedef statements
     simplifyUsingToTypedef();
@@ -5013,8 +5011,7 @@ void Tokenizer::setVarIdPass2()
         const std::string &scopeName(getScopeName(scopeInfo));
         const std::string scopeName2(scopeName.empty() ? std::string() : (scopeName + " :: "));
 
-        std::list<const Token *> classnameTokens;
-        classnameTokens.push_back(tok->next());
+        std::list<const Token*> classnameTokens{ tok->next() };
         Token* tokStart = tok->tokAt(2);
         while (Token::Match(tokStart, ":: %name%") || tokStart->str() == "<") {
             if (tokStart->str() == "<") {

lib/valueflow.cpp

@@ -1775,7 +1775,7 @@ static void valueFlowRightShift(TokenList &tokenList, const Settings* settings)
 
 static std::vector<MathLib::bigint> minUnsignedValue(const Token* tok, int depth = 8)
 {
-    std::vector<MathLib::bigint> result = {};
+    std::vector<MathLib::bigint> result;
     if (!tok)
         return result;
     if (depth < 0)
@@ -4942,7 +4942,7 @@ static void valueFlowLifetime(TokenList &tokenlist, ErrorLogger *errorLogger, co
                 continue;
             }
 
-            std::vector<const Token*> toks = {};
+            std::vector<const Token*> toks;
             if (tok->isUnaryOp("*") || parent->originalName() == "->") {
                 for (const ValueFlow::Value& v : tok->values()) {
                     if (!v.isLocalLifetimeValue())
@@ -9180,7 +9180,7 @@ struct ValueFlowState {
     SymbolDatabase& symboldatabase;
     ErrorLogger* errorLogger = nullptr;
     const Settings* settings = nullptr;
-    std::set<const Scope*> skippedFunctions = {};
+    std::set<const Scope*> skippedFunctions;
 };
 
 struct ValueFlowPass {