Array Initialization with Named Initializers

C99 之後提供了 named initializers 功能. 在初始化 array 時, 可以透過 enumuraion constant 來設定 array 特定欄位的初始值. 但要注意的是, C++ 不支援此功能.

Named Initializer

舉個例子:

enum Color_t {
    RED,
    YELLOW,
    BLUE = 4
};

static const int Color2Number[] = {
        [RED] = 9,
        [YELLOW] = 11,
        [BLUE] = 2
};

Reference

• Array initialization with enum indices in C but not C++