Apply modernize-use-emplace.

libsolidity/ast/ASTJsonImporter.cpp

@@ -495,7 +495,7 @@ ASTPointer<UserDefinedTypeName> ASTJsonImporter::createUserDefinedTypeName(Json:
 	string nameString = member(_node, "name").asString();
 	boost::algorithm::split(strs, nameString, boost::is_any_of("."));
 	for (string s: strs)
-		namePath.push_back(ASTString(s));
+		namePath.emplace_back(s);
 	return createASTNode<UserDefinedTypeName>(
 		_node,
 		namePath

libsolidity/codegen/ABIFunctions.cpp

@@ -843,7 +843,7 @@ string ABIFunctions::abiEncodingFunctionStruct(
 			if (dynamicMember)
 				solAssert(dynamic, "");
 
-			members.push_back({});
+			members.emplace_back();
 			members.back()["preprocess"] = "";
 
 			switch (_from.location())
@@ -1336,7 +1336,7 @@ string ABIFunctions::abiDecodingFunctionStruct(StructType const& _type, bool _fr
 			memberTempl("memoryOffset", toCompactHexWithPrefix(_type.memoryOffsetOfMember(member.name)));
 			memberTempl("abiDecode", abiDecodingFunction(*member.type, _fromMemory, false));
 
-			members.push_back({});
+			members.emplace_back();
 			members.back()["decode"] = memberTempl.render();
 			members.back()["memberName"] = member.name;
 			headPos += decodingType->calldataHeadSize();

libsolidity/codegen/ir/IRGenerator.cpp

@@ -339,7 +339,7 @@ string IRGenerator::dispatchRoutine(ContractDefinition const& _contract)
 	vector<map<string, string>> functions;
 	for (auto const& function: _contract.interfaceFunctions())
 	{
-		functions.push_back({});
+		functions.emplace_back();
 		map<string, string>& templ = functions.back();
 		templ["functionSelector"] = "0x" + function.first.hex();
 		FunctionTypePointer const& type = function.second;

libsolidity/formal/EncodingContext.cpp

@@ -232,7 +232,7 @@ void EncodingContext::pushSolver()
 	if (m_accumulateAssertions)
 		m_assertions.push_back(assertions());
 	else
-		m_assertions.push_back(smt::Expression(true));
+		m_assertions.emplace_back(true);
 }
 
 void EncodingContext::popSolver()

libsolidity/interface/StandardCompiler.cpp

@@ -200,7 +200,7 @@ bool isArtifactRequested(Json::Value const& _outputSelection, string const& _fil
 			/// for Contract-level targets try both contract name and wildcard
 			vector<string> contracts{ _contract };
 			if (!_contract.empty())
-				contracts.push_back("*");
+				contracts.emplace_back("*");
 			for (auto const& contract: contracts)
 				if (
 					_outputSelection[file].isMember(contract) &&