On Tuesday, 8 October 2013 at 13:45:42 UTC, Dicebot wrote:
On Tuesday, 8 October 2013 at 12:45:48 UTC, Andrea Fontana
wrote:
I have a number of functions like:
@MyUda("...")
void test();
And I want to check them (at compile time, of course) to
generate the right calls.
Is there a way to get a list of them? Using traits/reflection?
In specific module or in whole program?
Anyway, full answer:
1) For a given module it is very easy
```
foreach(name; __traits(allMembers, moduleName))
{
mixin ("alias symbol = " ~ name ~ ";");
static if (is(symbol == function))
{
alias UDAs = __traits(getAttributes, symbol);
foreach (UDA; UDAs)
{
static if (is(typeof(UDA) == MyUda))
// proceed as you wish
}
}
}
```
2)
To get all transitively accessible modules you need to use some
`.stringof` magic. Imported modules / packages are also listed in
`allMembers` tuple but only way to find those is to check if
`symbol.stringof` starts with "package " or "module " and then
call `__traits(allMembers, symbol) recursively.
Some of Phobos functions already do this and this should have
probably been generalized but not progress there so far, at least
one I am aware of.
