import std.stdio;

​

enum SymbolKindEnum {

    S_YYEMPTY = -2,  /* No symbol.  */

    S_YYEOF = 0,     /* "end of file"  */

    S_YYerror = 1,   /* error  */

    /* ... */

    S_input = 14,    /* input  */

    S_line = 15,     /* line  */

    S_exp = 16,      /* exp  */

}

​

string toString(SymbolKindEnum kind) pure @nogc

{

    final switch (kind) with(SymbolKindEnum) {

        case S_YYEMPTY:

            assert(false, "Tried representing no symbol as a string.");

        case S_YYEOF:

            return `"end of file"`;

        case S_YYerror:

            return `error`;

        /*...*/

        case S_input:

            return `input`;

        case S_line:

            return `line`;

        case S_exp:

            return `exp`;

    }

}

​

void main()

{

    auto kind = SymbolKindEnum.S_YYEOF;

    writeln(kind.toString); // "end of file"

}

​