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Alias std.traits.ReturnType
Get the type of the return value from a function,
a pointer to function, a delegate, a struct
with an opCall, a pointer to a struct with an opCall,
or a class with an opCall
. Please note that ref
is not part of a type, but the attribute of the function
(see template functionAttributes
).
Note: To reduce template instantiations, consider instead using
typeof(() { return func(args); } ())
if the argument types are known or
static if (is(typeof(func) Ret == return))
if only that basic test is needed.Example
int foo();
ReturnType!foo x; // x is declared as int
Authors
Walter Bright,
Tomasz Stachowiak (isExpressions
),
Andrei Alexandrescu,
Shin Fujishiro,
Robert Clipsham,
David Nadlinger,
Kenji Hara,
Shoichi Kato
License
Copyright © 1999-2025 by the D Language Foundation | Page generated by ddox.