I'd like to keep my keywords in a struct:

```
typedef const char* label;
const struct keywords_t
{
    label init;
    label moveUnit;
} keywords;

```

But I'd like to be able to check whether a keyword is valid with a for loop, so I tried to initialize the struct like this:

```
const label allowed_keywords[] =
{
    "INIT",
    "MOVE"
};

const struct keywords_t keywords =
{
    allowed_keywords[0],
    allowed_keywords[1]
};

```

This gives me an 

```
error: initializer element is not constant

```

What am I doing wrong? The whole array is constant, though.