LANG.STRUCT.SE.ASSIGN : Too Many Side Effects in Assignment

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C and C++

LANG.STRUCT.SE.ASSIGN : Too Many Side Effects in Assignment

要旨

An assignment operation has two or more additional side effects (beyond the side effect of the assignment itself).

プロパティ

クラス名

Too Many Side Effects in Assignment

日本語クラス名

Too Many Side Effects in Assignment

クラス分類

スタイル (style)

ニーモニック

LANG.STRUCT.SE.ASSIGN

カテゴリー

JSF++	JSF++:204	A single operation with side-effects shall only be used in certain contexts.
JPL	JPL:19	Do not use expressions with side effects.

対応言語

C および C++ で利用可能です。

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="Too Many Side Effects in Assignment"

注：非正規化された AST を継続して使用した場合、使用ディスク容量が増加し解析時間が長くなる可能性があります。

例

extern int x, y;

extern int f(int);            /* Functions are assumed to have side effects unless
                               * SIDE_EFFECT_FREE_FUNCTIONS specifies otherwise */
extern int iArr[10];

void assignment_rhs(void){
    x += f(x);                                  /* only one additional side effect */
    y = x+=2;                                   /* only one additional side effect */
    iArr[x++]=f(y);      /* 'Too Many Side Effects in Assignment' warning issued here
                          * - 2 additional side effects */
    y *= (x++ + y++);    /* 'Too Many Side Effects in Assignment' warning issued here
                          * - 2 additional side effects */
    x = (x+=2) * (y-=3); /* 'Too Many Side Effects in Assignment' warning issued here
                          * - 2 additional side effects */
}

LANG.STRUCT.SE.ASSIGN : Too Many Side Effects in Assignment

要旨

プロパティ

例

関連のある設定ファイルパラメータ