Re: 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!