Re: Introspecting a Module with Traits, allMembers
The others have already given some answers, I just want to point out that the (free) sample chapter of my D book covers this topic too: http://www.packtpub.com/discover-advantages-of-programming-in-d-cookbook/book Scanning a whole module and getting everything out takes a few tricks that I talk about in there.
Re: Introspecting a Module with Traits, allMembers
On Wednesday, 9 July 2014 at 20:52:29 UTC, Maxime Chevalier-Boisvert wrote: It's a bit of a hack, but it works. Is there any way to create some sort of alias for __traits(getMember, ir.ops, memberName) so that I don't have to write it out in full twice? Made some attempts but only got the compiler to complain. alias Alias(alias Sym) = Sym; alias member = Alias!(__traits(getMember, ir.ops, memberName); It does not work with normal alias because of grammar limitation afaik.
Re: Introspecting a Module with Traits, allMembers
I got the following code to do what I want:
static this()
{
void addOp(ref Opcode op)
{
assert (
op.mnem !in iir,
"duplicate op name " ~ op.mnem
);
iir[op.mnem] = &op;
}
foreach (memberName; __traits(allMembers, ir.ops))
{
static if (__traits(compiles, addOp(__traits(getMember,
ir.ops, memberName
{
writeln(memberName);
addOp(__traits(getMember, ir.ops, memberName));
}
}
}
It's a bit of a hack, but it works. Is there any way to create
some sort of alias for __traits(getMember, ir.ops, memberName) so
that I don't have to write it out in full twice? Made some
attempts but only got the compiler to complain.
Re: Introspecting a Module with Traits, allMembers
On Wednesday, 9 July 2014 at 20:07:57 UTC, NCrashed wrote:
On Wednesday, 9 July 2014 at 20:04:47 UTC, Maxime
Chevalier-Boisvert wrote:
auto members = [__traits(allMembers, "ir.ir")];
pragma(msg, members);
Have you tried without quotes?
pragma(msg, __traits(allMembers, ir.ir));
Did need to write it without the quotes, and to add "enum" to
force compile-time evaluation. It's actually ir.ops that I wanted
to list the members of. Got the following snippet to work:
static this()
{
enum members = [__traits(allMembers, ir.ops)];
pragma(msg, members);
}
Prints:
["object", "ir", "jit", "OpArg", "OpInfo", "Opcode", "GET_ARG",
"SET_STR", "MAKE_VALUE", "GET_WORD", "GET_TYPE", "IS_I32", ...]
Re: Introspecting a Module with Traits, allMembers
On Wednesday, 9 July 2014 at 20:07:57 UTC, NCrashed wrote: Produces: ir/iir.d(85): Error: argument has no members If module name is ir.iir: pragma(msg, __traits(allMembers, ir.iir));
Re: Introspecting a Module with Traits, allMembers
On Wednesday, 9 July 2014 at 20:04:47 UTC, Maxime Chevalier-Boisvert wrote: auto members = [__traits(allMembers, "ir.ir")]; pragma(msg, members); Have you tried without quotes? pragma(msg, __traits(allMembers, ir.ir));
Re: Introspecting a Module with Traits, allMembers
On Wed, 09 Jul 2014 20:07:56 +, NCrashed wrote: > On Wednesday, 9 July 2014 at 20:04:47 UTC, Maxime Chevalier-Boisvert > wrote: >> auto members = [__traits(allMembers, "ir.ir")]; >> pragma(msg, members); > > Have you tried without quotes? > pragma(msg, __traits(allMembers, ir.ir)); Also, looks like it should be "ir.iir"
