Token::stringify; refactor in/out parameter to return value

lib/checkio.cpp

@@ -1938,9 +1938,7 @@ void CheckIO::argumentType(std::ostream& os, const ArgumentInfo * argInfo)
                     os << type->str() << "::";
                     type = type->tokAt(2);
                 }
-                std::string s;
-                type->stringify(s, false, true, false);
-                os << s;
+                os << type->stringify(false, true, false);
                 if (type->strAt(1) == "*" && !argInfo->element)
                     os << " *";
                 else if (argInfo->variableInfo && !argInfo->element && argInfo->variableInfo->isArray())
@@ -1957,10 +1955,7 @@ void CheckIO::argumentType(std::ostream& os, const ArgumentInfo * argInfo)
                 os << type->originalName();
                 if (type->strAt(1) == "*" || argInfo->address)
                     os << " *";
-                os << " {aka ";
-                std::string s;
-                type->stringify(s, false, true, false);
-                os << s;
+                os << " {aka " << type->stringify(false, true, false);
                 if (type->strAt(1) == "*" || argInfo->address)
                     os << " *";
                 os << "}";

lib/symboldatabase.cpp

@@ -3488,9 +3488,7 @@ void SymbolDatabase::printOut(const char *title) const
         if (scope->type == Scope::eEnum) {
             std::cout << "    enumType: ";
             if (scope->enumType) {
-                std::string s;
-                scope->enumType->stringify(s, false, true, false);
-                std::cout << s;
+                std::cout << scope->enumType->stringify(false, true, false);
             } else
                 std::cout << "int";
             std::cout << std::endl;

lib/token.cpp

@@ -1174,55 +1174,58 @@ void Token::printLines(int lines) const
     std::cout << stringifyList(stringifyOptions::forDebugExprId(), nullptr, end) << std::endl;
 }
 
-void Token::stringify(std::string& os, const stringifyOptions& options) const
+std::string Token::stringify(const stringifyOptions& options) const
 {
+    std::string ret;
     if (options.attributes) {
         if (isUnsigned())
-            os += "unsigned ";
+            ret += "unsigned ";
         else if (isSigned())
-            os += "signed ";
+            ret += "signed ";
         if (isComplex())
-            os += "_Complex ";
+            ret += "_Complex ";
         if (isLong()) {
             if (!(mTokType == eString || mTokType == eChar))
-                os += "long ";
+                ret += "long ";
         }
     }
     if (options.macro && isExpandedMacro())
-        os += '$';
+        ret += '$';
     if (isName() && mStr.find(' ') != std::string::npos) {
         for (char i : mStr) {
             if (i != ' ')
-                os += i;
+                ret += i;
         }
     } else if (mStr[0] != '\"' || mStr.find('\0') == std::string::npos)
-        os += mStr;
+        ret += mStr;
     else {
         for (char i : mStr) {
             if (i == '\0')
-                os += "\\0";
+                ret += "\\0";
             else
-                os += i;
+                ret += i;
         }
     }
     if (options.varid && mImpl->mVarId != 0) {
-        os += '@';
-        os += (options.idtype ? "var" : "");
-        os += std::to_string(mImpl->mVarId);
+        ret += '@';
+        ret += (options.idtype ? "var" : "");
+        ret += std::to_string(mImpl->mVarId);
     } else if (options.exprid && mImpl->mExprId != 0) {
-        os += '@';
-        os += (options.idtype ? "expr" : "");
-        os += std::to_string(mImpl->mExprId);
+        ret += '@';
+        ret += (options.idtype ? "expr" : "");
+        ret += std::to_string(mImpl->mExprId);
     }
+
+    return ret;
 }
 
-void Token::stringify(std::string& os, bool varid, bool attributes, bool macro) const
+std::string Token::stringify(bool varid, bool attributes, bool macro) const
 {
     stringifyOptions options;
     options.varid = varid;
     options.attributes = attributes;
     options.macro = macro;
-    stringify(os, options);
+    return stringify(options);
 }
 
 std::string Token::stringifyList(const stringifyOptions& options, const std::vector<std::string>* fileNames, const Token* end) const
@@ -1292,7 +1295,7 @@ std::string Token::stringifyList(const stringifyOptions& options, const std::vec
             lineNumber = tok->linenr();
         }
 
-        tok->stringify(ret, options); // print token
+        ret += tok->stringify(options); // print token
         if (tok->next() != end && (!options.linebreaks || (tok->next()->linenr() == tok->linenr() && tok->next()->fileIndex() == tok->fileIndex())))
             ret += ' ';
     }

lib/token.h

@@ -887,16 +887,15 @@ public:
         }
     };
 
-    void stringify(std::string& os, const stringifyOptions& options) const;
+    std::string stringify(const stringifyOptions& options) const;
 
     /**
      * Stringify a token
-     * @param os The result is shifted into that output stream
      * @param varid Print varids. (Style: "varname\@id")
      * @param attributes Print attributes of tokens like "unsigned" in front of it.
      * @param macro Prints $ in front of the token if it was expanded from a macro.
      */
-    void stringify(std::string& os, bool varid, bool attributes, bool macro) const;
+    std::string stringify(bool varid, bool attributes, bool macro) const;
 
     std::string stringifyList(const stringifyOptions& options, const std::vector<std::string>* fileNames = nullptr, const Token* end = nullptr) const;
     std::string stringifyList(const Token* end, bool attributes = true) const;