C++核心準(zhǔn)則ES.73:如果沒有明顯的循環(huán)變量,while語句要好于for語句

ES.73: Prefer a?while-statement to a?for-statement when there is no obvious loop variable

ES.73:如果沒有明顯的循環(huán)變量，while語句要好于for語句

Reason（原因）

Readability.

可讀性

Example（示例）

int events = 0;
for (; wait_for_event(); ++events) {  // bad, confusing
    // ...
}

The "event loop" is misleading because the?events?counter has nothing to do with the loop condition (wait_for_event()). Better

因?yàn)閑vent計(jì)數(shù)和循環(huán)條件（wait_for_event()）沒有任何關(guān)系，“event loop”實(shí)際上是一種誤導(dǎo)。較好的寫法是：

int events = 0;
while (wait_for_event()) {      // better
    ++events;
    // ...
}

Enforcement（實(shí)施建議）

Flag actions in?for-initializers and?for-increments that do not relate to the?for-condition.

如果循環(huán)變量初始化和增量操作中的操作和循環(huán)條件沒有任何關(guān)系，進(jìn)行提示。

原文鏈接

https://github.com/isocpp/CppCoreGuidelines/blob/master/CppCoreGuidelines.md#es73-prefer-a-while-statement-to-a-for-statement-when-there-is-no-obvious-loop-variable

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