Re: This is probably trivial or impossible Code Introspection...

[Ali Çehreli via Digitalmars-d-learn]

On 09/19/2015 10:21 PM, WhatMeWorry wrote:
On Saturday, 19 September 2015 at 19:54:45 UTC, Adam D. Ruppe wrote:
On Saturday, 19 September 2015 at 19:52:56 UTC, WhatMeWorry wrote:
So I've got type and value of each member, but I want their actual
names?

http://dlang.org/phobos/std_traits.html#FieldNameTuple

You can also do something like `foo.tupleof[idx]["foo.".length .. $]`
for an individual thing but the phobos one should be the nicest.


Thanks.  But now I have an even more fundamental problem.  I keep
getting a FieldNameTuple is not defined.  But I've clearly got the
import statement.  I even copied the example from Phobos verbatim:

import std.traits;

struct S { int x; float y; }
static assert(FieldNameTuple!S == TypeTuple!("x", "y"));

But I still get the error.

Error: template instance FieldNameTuple!S template 'FieldNameTuple' is
not defined

I've been working for hours on this stupid thing.

This compiles and passes the assert for me with v2.068.2-b1:

import std.traits;
import std.meta;

struct S { int x; float y; }
static assert(FieldNameTuple!S == AliasSeq!("x", "y"));

void main()
{}

(std.meta.AliasSeq is the new name for std.typetuple.TypeTuple but 
TypeTuple still works.)

Ali