错误:C++ 中不允许使用类型名称

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问题描述

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当我编译我的代码时，VC++ 返回一个错误，如上所述.受影响的行是 (brushes){5.6, 214.0 , 13.0}

When I compiled my code, VC++ returns an error, as stated above. The affected line is (brushes){5.6, 214.0 , 13.0}

更具体地说，这里是受影响的代码块

More specifically, here is the affected code block

const  brushes palette[] = {
    (brushes){5.6, 214.0 , 13.0},
    (brushes){200.0, 211.0, 12.0}
};

这段代码在 Linux 中编译得很好，那么为什么 VC++ 会发生这种情况?

This code compiles fine in Linux, so why is this happening for VC++?

画笔的定义:

typedef union {
    struct {
        double c;
        double m;
        double y;
    } t;
double v[3];
} brushes;

推荐答案

您使用的 C99 结构(第 6.5.2.5 节复合文字)不受 MS VC 支持，但 GCC 支持.

You are using a C99 construct (§6.5.2.5 Compound Literals) which is not supported by MS VC, but which is supported by GCC.

您应该能够通过删除 (brushes) 符号来编译代码:

You should be able to get the code to compile on both by dropping the (brushes) notation:

const  brushes palette[] = {
    { {   5.6, 214.0, 13.0 } },
    { { 200.0, 211.0, 12.0 } },
};

这将初始化 union 的第一个成员，即 brushes.这适用于 GCC；我相信它也应该与 MSVC 一起使用.

This will initialize the first member of the union that is brushes. This works with GCC; it should work with MSVC too, I believe.

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