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| CodeSonar® 9.2p0 | CONFIDENTIAL | CodeSecure Inc |
A use of reinterpret_cast, which can lead to undefined behavior.
The following will not trigger a warning of this class, because their behavior is well defined.
| Exception case 1 |
reinterpret_cast<T
*>(p) where
|
|---|---|
| Exception case 2 |
reinterpret_cast<T>(p) where
|
| クラス名 | Cast: reinterpret_cast | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 日本語クラス名 | Cast: reinterpret_cast | ||||||||||||
| クラス分類 | スタイル (style) | ||||||||||||
| ニーモニック | LANG.CAST.REINTERPRET | ||||||||||||
| カテゴリー |
|
||||||||||||
| 対応言語 | C++ のみ利用可能です。 C は利用できません。 |
||||||||||||
| 有効/無効設定 | このワーニングクラスのチェックはデフォルトで無効になっており、プロジェクトには非正規の C向けAST
が必要になります。有効にするにはプロジェクト設定ファイル (configuration file) に以下の WARNING_FILTER ルールと
RETAIN_UNNORMALIZED_C_AST 設定を追加してください。
RETAIN_UNNORMALIZED_C_AST = Yes WARNING_FILTER += allow class="Cast: reinterpret_cast" |
#include <cstdint>
class Base {
};
class Derived : public Base {
};
void reinterpret_cast_examples(Base *b, float *f, char c)
{
reinterpret_cast<int *>(f); // 'Cast: reinterpret_cast' warning issued here
reinterpret_cast<Derived *>(b); // 'Cast: reinterpret_cast' warning issued here;
// use static_cast instead
reinterpret_cast<void *>(b); // ok: casting a pointer to void*
// (exception case 1)
reinterpret_cast<void *>(c); // 'Cast: reinterpret_cast' warning issued here
// - exception case 1 applies only when casting a pointer
reinterpret_cast<std::uintptr_t>(b); // ok: casting a pointer to an integer type
// large enough represent a pointer value
// (exception case 2)
// Exception case 2 applies only when casting a pointer.
// The following reinterpret_cast expression is commented out
// because it typically causes a parse error instead of triggering a warning.
// reinterpret_cast<std::uintptr_t>(c);
}
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。
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