Our template emission strategy is broken

deadalnix via Digitalmars-d digitalmars-d at puremagic.com
Thu Nov 12 17:14:23 PST 2015

On Friday, 13 November 2015 at 00:58:57 UTC, Walter Bright wrote:
> On 11/12/2015 2:58 PM, deadalnix wrote:
>> You can have a template that
>> do mixin without creating loop because then you pass it down 
>> identifiers that
>> won't resolve.
> My brain seg faulted trying to parse that.

module a;

struct S(E) {
     import std.bitfield;
         bool, "flag", 1,
         T, "myT", SizeOf!T,
         uint, "", 32 - SizeOf!T - 1,

module b;

enum MyEnum { Val1, Val2, Val3 }

import a;
alias UsefulStruct = S!MyEnum; // Boom, MyEnum is undefined

Now you end up having to tie stupid node into your code, like 
adding all user of library X as import in library X. Which sucks, 
but is forced by the language design.

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