LANG.TYPE.IMPSC : Implicit Encoding in String Concatenation

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CodeSonar^® 9.2p0

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LANG.TYPE.IMPSC : Implicit Encoding in String Concatenation

要旨

Some, but not all, of the string literals in a concatenation operation have implicit encoding.

プロパティ

例

#include <string>
using namespace std::string_literals;

const wchar_t * bad1 =   "Hello" L"World";  // 'Implicit Encoding in String Concatenation' warning issued here
const wchar_t * bad2 =  L"Hello"  "World";  // 'Implicit Encoding in String Concatenation' warning issued here

const char * good1 =  "Hello" "World";                   // ok: no explicit encoding
const wchar_t * good2 =  L"Hello" L"World";              // ok: same explicit encoding

// User-defined suffixes do not denote an encoding.
std::string     good3 =  "abc"  "def"s;                  // ok: no explicit encoding
std::wstring    good4 = L"abc" L"def"s;                  // ok: same explicit encoding
std::wstring bad3 = "Hello"s L"World"s;     // 'Implicit Encoding in String Concatenation' warning issued here

// The R prefix denotes a raw string, not an encoding.
const char *    good5 =  "abc" R"(def)";                // ok: no explicit encoding
const wchar_t * good6 = L"abc" LR"(def)";               // ok: same explicit encoding
const wchar_t * bad4 = "Hello" LR"(World)"; // 'Implicit Encoding in String Concatenation' warning issued here

関連のある設定ファイルパラメータ

設定ファイルの以下のパラメータがこのワーニングクラスのチェックに影響します。