LANG.TYPE.IMPSC : Implicit Encoding in String Concatenation

JavaScript is not currently enabled, but is required for full CodeSonar manual search and browse functionality.

If you are viewing this file in your hub's Web GUI, enable JavaScript in your browser: you will also need it for GUI functionality.

If you opened this file directly from disk, your browser may be directly suppressing JavaScript functionality: certain browsers perform this suppression on local files (but not files delivered by web servers) for security reasons.

If you access the manual through the hub's Web GUI, the functionality will not be suppressed because the hub is a web server.
Alternatively, your browser may allow you to explicitly disable the security setting that suppresses functionality. See the CodeSonar FAQ for more information.

CodeSonar^® 9.2p0

CONFIDENTIAL

CodeSecure Inc

LANG.TYPE.IMPSC : Implicit Encoding in String Concatenation

Summary

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

Properties

Example

#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

Relevant Configuration File Parameters

The following configuration file parameters affect checks for this warning class.