C/C++ 枚举值映射字符串（宏实现）

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直接映射枚举值名称

#ifndef COLOR_H
#define COLOR_H

#define DEF_COLORS \
    X(RED)         \
    X(ORANGE)      \
    X(YELLOW)      \
    X(GREEN)       \
    X(CYAN)        \
    X(BLUE)        \
    X(PURPLE)

enum Color {
#define X(name) name,
    DEF_COLORS
#undef X
    color_count
};

const char* ColorToStr(Color c) {
    switch (c) {
#define X(name)  case name : return #name;
        DEF_COLORS
#undef X
    default:
        return "";
    }
}

#endif /* COLOR_H */

映射指定字符串

#ifndef COLOR_H
#define COLOR_H

#define DEF_COLORS  \
    X(RED, "红")    \
    X(ORANGE, "橙") \
    X(YELLOW, "黄") \
    X(GREEN, "绿")  \
    X(CYAN, "青")   \
    X(BLUE, "蓝")   \
    X(PURPLE, "紫")

enum Color {
#define X(name, str) name,
    DEF_COLORS
#undef X
        color_count
};

const char* ColorToStr(Color c) {
    switch (c) {
#define X(name, str) case name : return str;
        DEF_COLORS
#undef X
    default:
        return "";
    }
}

#endif /* COLOR_H */

测试代码

#include <iostream>
#include "color.h"

int main() {
    for (size_t i = 0; i < size_t(Color::color_count); i++) {
        std::cout << ColorToStr(Color(i)) << std::endl;
    }
    return 0;
}

---

参考：

• https://stackoverflow.com/questions/201593/is-there-a-simple-way-to-convert-c-enum-to-string
• https://belaycpp.com/2021/08/24/best-ways-to-convert-an-enum-to-a-string/

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