• MarisaLovesUsAll (10/10) Aug 31 2014 How to compare two types? Will I use T.stringof instead of this?
• Adam D. Ruppe (9/9) Aug 31 2014 There's two ways:
• bearophile (5/9) Aug 31 2014 And what about:
• Adam D. Ruppe (3/4) Aug 31 2014 You could, but since it is static info you might as well use
• Adam D. Ruppe (2/2) Aug 31 2014 typeof() always gets the static type, typeid() is needed if you
• MarisaLovesUsAll (1/1) Sep 01 2014 Thanks for the answers!

"MarisaLovesUsAll" <marisalovesusall gmail.com> writes:

How to compare two types? Will I use T.stringof instead of this?

void main()
{
	if(One is Two) {} //Error: type One is not an expression
                           //Error: type Two is not an expression
}

class One {}
class Two {}

Regards,
MarisaLovesUsAll

"Adam D. Ruppe" <destructionator gmail.com> writes:

There's two ways:

static if(is(One == Two)) {

}


That compares the static types in a form of conditional 
compilation. http://dlang.org/expression.html#IsExpression

If you want to compare the runtime type of a class object, you 
can do:

if(typeid(obj_one) == typeid(obj_two))

that should tell you if they are the same dynamic class type.

"bearophile" <bearophileHUGS lycos.com> writes:

Adam D. Ruppe:

 If you want to compare the runtime type of a class object, you 
 can do:

 if(typeid(obj_one) == typeid(obj_two))

 that should tell you if they are the same dynamic class type.

And what about:

if (is(typeof(obj_one) == typeof(obj_two)))

Bye,
bearophile

"Adam D. Ruppe" <destructionator gmail.com> writes:

On Sunday, 31 August 2014 at 23:53:31 UTC, bearophile wrote:
 if (is(typeof(obj_one) == typeof(obj_two)))

You could, but since it is static info you might as well use 
static if.

"Adam D. Ruppe" <destructionator gmail.com> writes:

typeof() always gets the static type, typeid() is needed if you
want the dynamic type.

"MarisaLovesUsAll" <marisalovesusall gmail.com> writes:

Thanks for the answers!