alias for regular expressions

[Thunderbird via Digitalmars-d-learn]

On Monday, 14 September 2015 at 07:11:38 UTC, Meta wrote:
> On Sunday, 13 September 2015 at 19:52:20 UTC, Thunderbird wrote:
>> Thanks for your quick reply :)
>
> To expand on that, alias in D is nothing like the C macro 
> preprocessor. D specifically disallows tricks like `#define 
> true false`. In D, aliases are just another name for a symbol. 
> Ex:
>
> struct Test
> {
>     int n;
>     float f;
> }
>
> alias IntFloat = Test; //IntFloat is just another name for Test
>
> Test t = Test(0, 1.0);
> IntFloat inf = IntFloat(0, 1.0);
>
> //Test and IntFloat are NOT separate types.
> //Use std.typecons.Typedef for that
> assert(t == inf);
> assert(is(typeof(t) == typeof(inf));

Thanks for elaborating!