可能的编译器故障而在MSVC12（VS2013）用指定的初始化 [英] Possible compiler bug in MSVC12 (VS2013) with designated initializer

问题描述

使用VS2013更新2中，我无意中发现了一些奇怪的错误消息：

Using VS2013 Update 2, I've stumbled on some strange error message :

// test.c
int main(void)
{
    struct foo {
        int i;
        float f;
    };

    struct bar {
        unsigned u;
        struct foo foo;
        double d;
    };

    struct foo some_foo = {
        .i = 1,
        .f = 2.0
    };

    struct bar some_bar = {
        .u = 3,

// error C2440 : 'initializing' : cannot convert from 'foo' to 'int'
        .foo = some_foo,

        .d = 4.0
    };

// Works fine
    some_bar.foo = some_foo;

    return 0;
}

GCC和锵接受它。

Both GCC and Clang accept it.

我缺少的东西，还是在这片code的公开编译器错误？

Am I missing something or does this piece of code exposes a compiler bug ?

编辑：复制：<一href=\"https://stackoverflow.com/questions/23707402/initializing-struct-within-another-struct-using-designated-initializer-causes-co\">Initializing使用指定的初始化导致另一个结构内结构编译错误在Visual Studio 2013

推荐答案

这是一个<一个href=\"http://www.beta.microsoft.com/VisualStudio/feedback/details/805981/msvc-2013-c99-designated-initializers-cannot-initialize-unions-within-structs\"相对=nofollow>已知的bug 。据说这是固定在MSVC的下一个版本。

It is a known bug. It is said to be fixed in the next version of MSVC.

编辑：不幸的是，错误仍在present在VS14 CTP 4

Unfortunately, the bug is still present in VS14 CTP 4.

编辑：此bug已被固定在VS2015 CTP 5

This bug has been fixed in VS2015 CTP 5.

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