Re: accessing your scope for template metaprogramming ?

[bearophile]

Sean Cavanaugh:

> Is there any way to access the your current scope?  For instance the 
> following pseudocode is what I am after more or less:
> 
> 
> class Foo
> {
>alias byte function(int) BarCompatibleInterface;
> 
>byte Bar(int)
>{
>  static assert(is(typeof(localscope) == function));

You have just invented another purpose for something like a _function_, that 
refers to the current function that I have originally desired to solve this 
different problem.

See my Comments 1 and 2 here:
http://d.puremagic.com/issues/show_bug.cgi?id=5140

Bye,
bearophile

accessing your scope for template metaprogramming ?

[Sean Cavanaugh]

Is there any way to access the your current scope?  For instance the 
following pseudocode is what I am after more or less:



class Foo
{
  alias byte function(int) BarCompatibleInterface;

  byte Bar(int)
  {
static assert(is(typeof(localscope) == function));

static assert(is(std.traits.ReturnType!(localscope) == 
std.traits.ReturnType!(BarCompatibleInterface));


static assert(is(std.traits.ParameterTypeTuple!(localscope) == 
std.traits.ParameterTypeTuple!(BarCompatibleInterface));


static assert(is(typeof(localscope.outer) == class));

static assert(is(typeof(localscope.outer.outer) == module));
  }
}


My desire for this is to help the compiler generate better error 
messages from compilation of string mixins, as they could access the 
function and/or class they are in and give a better error message from 
within a static assert() construct.