为什么锵警告：''和;＆放大器;'内部'||'`？ [英] Why does Clang warn: `'&&' within '||'`?

问题描述

我的理解是括号没有什么区别，因此没有任何理由认为锵提醒这是一个默认值（不是改善code-清晰度等）？我preFER不添加，因为我不喜欢加入code为code的缘故括号。

 的src / websocket.c：420：43：警告：'和;＆放大器;'内部'||' [-Wlogical-OP-括号]
        如果（RV == 0安培;＆安培; N = 0 || RV == -1放大器;！＆放大器;错误号== ECONNRESET）{
                              ~~ ^ ~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~
SRC / websocket.c：420：43：注意：周围的地方括号'和;＆放大器;'前pression到
      关闭此警告
        如果（RV == 0安培;＆安培; N = 0 || RV == -1放大器;！＆放大器;错误号== ECONNRESET）{
                                 ~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~
 

解决方案

的自然倾向是读它从左到右，而且很容易忘记操作precedence。这就是说，它只是一个警告，如果你知道你在做什么，你自己的风格允许，随意燮preSS它。

My understanding is the parentheses make no difference, so is there any reason (other than to "improve" code-clarity) that Clang warns this as a default? I prefer not to add the parentheses as I dislike adding code for code’s sake.

src/websocket.c:420:43: warning: '&&' within '||' [-Wlogical-op-parentheses]
        if (rv == 0 && N != 0 || rv == -1 && errno == ECONNRESET) {
                              ~~ ~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
src/websocket.c:420:43: note: place parentheses around the '&&' expression to
      silence this warning
        if (rv == 0 && N != 0 || rv == -1 && errno == ECONNRESET) {
                                 ~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

解决方案

The natural tendency is to read it left to right, and it's easy to forget the operator precedence. That said, it's just a warning, and if you know what you're doing and your own style allows it, feel free to suppress it.

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