使用Qt缺少转换警告(Missing conversion warning using Qt)

使用Qt缺少转换警告(Missing conversion warning using Qt)

以下代码生成警告：

warning C4244: 'initializing': conversion from 'int64_t' to 'int', possible loss of data

使用CL 19（带-W3 ）。

#include <inttypes.h> #include <climits> int main() { int64_t a = INT_MAX; int b = a+1; }

但是，只要我包含任何与Qt相关的内容，

#include <QApplication>

警告消失了。 但我希望这些警告显示给我自己的文件。 这个Qt是否隐藏了自己的警告泄漏到我的来源？ 我可以避免吗？

The code below generates a warning:

warning C4244: 'initializing': conversion from 'int64_t' to 'int', possible loss of data

using CL 19 (with -W3).

#include <inttypes.h> #include <climits> int main() { int64_t a = INT_MAX; int b = a+1; }

However it seems as soon as I include anything Qt related like:

#include <QApplication>

the warning goes away. But I want those warnings to show for my own files. Is this Qt hiding its own warnings leaking into my source ? And can I avoid it ?

最满意答案

qglobal.h禁用了一堆过于冗长的警告，它几乎包含在任何Qt头中（间接）。 相关代码在这里 。

要重新启用它们， 请将QT_CC_WARNINGS添加到您的定义中 （在qmake项目中， DEFINES += QT_CC_WARNINGS ）。 我很确定这会触发Qt标头的警告......

A bunch of overly verbose warnings get disabled by qglobal.h, which is included (indirectly) by virtually any Qt header. Relevant code is here.

To reenable them, add QT_CC_WARNINGS to your defines (in a qmake project, DEFINES += QT_CC_WARNINGS). I'm pretty sure this will trigger warnings from Qt headers...