On 12/28/2015 04:28 PM, Walter Bright wrote:
>
https://www.reddit.com/r/programming/comments/3ykko7/implementing_a_programming_language_in_d_lexical/
Although the author does not use many D idioms, I've just learned
(re-learned?) anonymous enums from that code.
I've realized that with a nested anonymous enum, there is no need to
(and no way of) mentioning the enum type inside a user-defined type.
This can simplify the implementation:
struct S {
enum { value }
void foo() {
// Look ma, no type:
assert(value == 0);
}
}
void main() {
// Properly name-spaced outside of the struct:
assert(S.value == 0);
}
As can be seen, the users of the struct still have to name-space the
enum value as S.value. There is no need for an additional enum type for
example like S.MyEnum.value.
Ali
