avoid using a temporary object when inserting into a container

lib/checkio.cpp

@@ -141,11 +141,11 @@ void CheckIO::checkFileUsage()
 
         if (var->isLocal()) {
             if (var->nameToken()->strAt(1) == "(") // initialize by calling "ctor"
-                filepointers.insert(std::make_pair(var->declarationId(), Filepointer(OpenMode::UNKNOWN_OM)));
+                filepointers.emplace(var->declarationId(), Filepointer(OpenMode::UNKNOWN_OM));
             else
-                filepointers.insert(std::make_pair(var->declarationId(), Filepointer(OpenMode::CLOSED)));
+                filepointers.emplace(var->declarationId(), Filepointer(OpenMode::CLOSED));
         } else {
-            filepointers.insert(std::make_pair(var->declarationId(), Filepointer(OpenMode::UNKNOWN_OM)));
+            filepointers.emplace(var->declarationId(), Filepointer(OpenMode::UNKNOWN_OM));
             // TODO: If all fopen calls we find open the file in the same type, we can set Filepointer::mode
         }
     }
@@ -281,9 +281,8 @@ void CheckIO::checkFileUsage()
                 if (!fileTok || !fileTok->varId() || fileTok->strAt(1) == "[")
                     continue;
 
-                if (filepointers.find(fileTok->varId()) == filepointers.end()) { // function call indicates: Its a File
-                    filepointers.insert(std::make_pair(fileTok->varId(), Filepointer(OpenMode::UNKNOWN_OM)));
-                }
+                // function call indicates: Its a File
+                filepointers.emplace(fileTok->varId(), Filepointer(OpenMode::UNKNOWN_OM));
 
                 Filepointer& f = filepointers[fileTok->varId()];
 

lib/checkother.cpp

@@ -2472,8 +2472,8 @@ void CheckOther::checkInvalidFree()
             // Keep track of which variables were assigned addresses to newly-allocated memory
             if ((tok->isCpp() && Token::Match(tok, "%var% = new")) ||
                 (Token::Match(tok, "%var% = %name% (") && mSettings->library.getAllocFuncInfo(tok->tokAt(2)))) {
-                allocation.insert(std::make_pair(tok->varId(), tok->strAt(2)));
-                inconclusive.insert(std::make_pair(tok->varId(), false));
+                allocation.emplace(tok->varId(), tok->strAt(2));
+                inconclusive.emplace(tok->varId(), false);
             }
 
             // If a previously-allocated pointer is incremented or decremented, any subsequent

lib/checkstl.cpp

@@ -984,7 +984,7 @@ namespace {
             void add(const Reference& r) {
                 if (!r.tok)
                     return;
-                expressions.insert(std::make_pair(r.tok->exprId(), r));
+                expressions.emplace(r.tok->exprId(), r);
             }
 
             std::vector<Reference> invalidTokens() const {

lib/checkunusedvar.cpp

@@ -263,7 +263,7 @@ void Variables::addVar(const Variable *var,
                        bool write_)
 {
     if (var->declarationId() > 0) {
-        mVarUsage.insert(std::make_pair(var->declarationId(), VariableUsage(var, type, false, write_, false)));
+        mVarUsage.emplace(var->declarationId(), VariableUsage(var, type, false, write_, false));
     }
 }
 

lib/clangimport.cpp

@@ -234,26 +234,26 @@ namespace clangimport {
 
         void enumDecl(const std::string &addr, Token *nameToken, Enumerator *enumerator) {
             Decl decl(nameToken, enumerator);
-            mDeclMap.insert(std::pair<std::string, Decl>(addr, decl));
+            mDeclMap.emplace(addr, decl);
             nameToken->enumerator(enumerator);
             notFound(addr);
         }
 
         void funcDecl(const std::string &addr, Token *nameToken, Function *function) {
             Decl decl(nameToken, function);
-            mDeclMap.insert(std::pair<std::string, Decl>(addr, decl));
+            mDeclMap.emplace(addr, decl);
             nameToken->function(function);
             notFound(addr);
         }
 
         void scopeDecl(const std::string &addr, Scope *scope) {
             Decl decl(scope);
-            mDeclMap.insert(std::pair<std::string, Decl>(addr, decl));
+            mDeclMap.emplace(addr, decl);
         }
 
         void varDecl(const std::string &addr, Token *def, Variable *var) {
             Decl decl(def, var);
-            mDeclMap.insert(std::pair<std::string, Decl>(addr, decl));
+            mDeclMap.emplace(addr, decl);
             def->varId(++mVarId);
             def->variable(var);
             if (def->valueType())

lib/symboldatabase.cpp

@@ -1250,13 +1250,13 @@ void SymbolDatabase::fixVarId(VarIdMap & varIds, const Token * vartok, Token * m
             mVariableList.push_back(membervar);
         } else
             mVariableList[membertok->varId()] = membervar;
-        varIds.insert(std::make_pair(vartok->varId(), memberId));
+        varIds.emplace(vartok->varId(), memberId);
         varId = varIds.find(vartok->varId());
     }
     MemberIdMap::const_iterator memberId = varId->second.find(membervar->nameToken()->varId());
     if (memberId == varId->second.cend()) {
         if (membertok->varId() == 0) {
-            varId->second.insert(std::make_pair(membervar->nameToken()->varId(), mTokenizer.newVarId()));
+            varId->second.emplace(membervar->nameToken()->varId(), mTokenizer.newVarId());
             mVariableList.push_back(membervar);
             memberId = varId->second.find(membervar->nameToken()->varId());
         } else

lib/symboldatabase.h

@@ -1162,7 +1162,7 @@ class CPPCHECKLIB Scope {
 
         const Function * back = &functionList.back();
 
-        functionMap.insert(make_pair(back->tokenDef->str(), back));
+        functionMap.emplace(back->tokenDef->str(), back);
     }
 
     AccessControl defaultAccess() const;

lib/templatesimplifier.cpp

@@ -780,12 +780,12 @@ void TemplateSimplifier::getTemplateInstantiations()
 
     for (const auto & decl : mTemplateDeclarations) {
         if (decl.isFunction())
-            functionNameMap.insert(std::make_pair(decl.name(), &decl));
+            functionNameMap.emplace(decl.name(), &decl);
     }
 
     for (const auto & decl : mTemplateForwardDeclarations) {
         if (decl.isFunction())
-            functionNameMap.insert(std::make_pair(decl.name(), &decl));
+            functionNameMap.emplace(decl.name(), &decl);
     }
 
     const Token *skip = nullptr;

lib/valueflow.cpp

@@ -5933,7 +5933,7 @@ static void valueFlowUninit(TokenList& tokenlist, ErrorLogger& errorLogger, cons
                     Token* tok2 = p.first;
                     const ValueFlow::Value& v = p.second;
                     // Try to insert into map
-                    auto pp = partialReads.insert(std::make_pair(tok2, v));
+                    auto pp = partialReads.emplace(tok2, v);
                     ValueFlow::Value& v2 = pp.first->second;
                     const bool inserted = pp.second;
                     // Merge the two values if it is already in map