• Andrey Zherikov (4/4) Mar 08 2021 What am I doing wrong?
• Adam D. Ruppe (4/5) Mar 08 2021 try
• Andrey Zherikov (7/10) Mar 09 2021 Thanks!
• Adam D. Ruppe (5/7) Mar 09 2021 I actually don't know. The docs do say that function pointers
• Kyle Ingraham (3/15) Mar 09 2021 Does Unqual help here?:
• Boris Carvajal (4/16) Mar 09 2021 Not quite straightforward, but "void function()" is actually a
• Andrey Zherikov (2/22) Mar 09 2021 That's a trick! Thank you!

Andrey Zherikov <andrey.zherikov gmail.com> writes:

What am I doing wrong?

void f() {}

writeln(typeof(f).stringof);   // prints "void()"

writeln(is(f == function));    // prints "false"

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

On Tuesday, 9 March 2021 at 02:50:11 UTC, Andrey Zherikov wrote:
 writeln(is(f == function));    // prints "false"

try

is(typeof(f) == function)

it is kinda weird but that's the trick

Andrey Zherikov <andrey.zherikov gmail.com> writes:

On Tuesday, 9 March 2021 at 02:57:46 UTC, Adam D. Ruppe wrote:
 try

 is(typeof(f) == function)

 it is kinda weird but that's the trick

Thanks!
Should it work for in this case as well?

alias f = (){};

writeln(typeof(f).stringof);        // prints "void function() 
pure nothrow  nogc  safe"

writeln(is(typeof(f) == function)); // prints "false"

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

On Tuesday, 9 March 2021 at 11:58:45 UTC, Andrey Zherikov wrote:
 Should it work for in this case as well?

 alias f = (){};

I actually don't know. The docs do say that function pointers 
work differently - they match `is(typeof(f) == return)` but it 
isn't clear if it would match == function.

You'd certainly think it would... but idk.

Kyle Ingraham <kyle kyleingraham.com> writes:

On Tuesday, 9 March 2021 at 11:58:45 UTC, Andrey Zherikov wrote:
 On Tuesday, 9 March 2021 at 02:57:46 UTC, Adam D. Ruppe wrote:
 try

 is(typeof(f) == function)

 it is kinda weird but that's the trick

 Thanks!
 Should it work for in this case as well?

 alias f = (){};

 writeln(typeof(f).stringof);        // prints "void function() 
 pure nothrow  nogc  safe"

 writeln(is(typeof(f) == function)); // prints "false"

Does Unqual help here?: 
https://dlang.org/phobos/std_traits.html#Unqual

Boris Carvajal <boris2.9 gmail.com> writes:

On Tuesday, 9 March 2021 at 11:58:45 UTC, Andrey Zherikov wrote:
 On Tuesday, 9 March 2021 at 02:57:46 UTC, Adam D. Ruppe wrote:
 try

 is(typeof(f) == function)

 it is kinda weird but that's the trick

 Thanks!
 Should it work for in this case as well?

 alias f = (){};

 writeln(typeof(f).stringof);        // prints "void function() 
 pure nothrow  nogc  safe"

 writeln(is(typeof(f) == function)); // prints "false"

Not quite straightforward, but "void function()" is actually a 
pointer to function, you need to dereference it first:

is(typeof(*f) == function)

Andrey Zherikov <andrey.zherikov gmail.com> writes:

On Tuesday, 9 March 2021 at 18:53:06 UTC, Boris Carvajal wrote:
 On Tuesday, 9 March 2021 at 11:58:45 UTC, Andrey Zherikov wrote:
 On Tuesday, 9 March 2021 at 02:57:46 UTC, Adam D. Ruppe wrote:
 try

 is(typeof(f) == function)

 it is kinda weird but that's the trick

 Thanks!
 Should it work for in this case as well?

 alias f = (){};

 writeln(typeof(f).stringof);        // prints "void function() 
 pure nothrow  nogc  safe"

 writeln(is(typeof(f) == function)); // prints "false"

 Not quite straightforward, but "void function()" is actually a 
 pointer to function, you need to dereference it first:

 is(typeof(*f) == function)

That's a trick! Thank you!