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Enum member std.traits.isSomeFunction

Detect whether symbol or type T is a function, a function pointer or a delegate.

enum isSomeFunction(alias T) = is(T == return) || is(typeof(T) == return) || is(typeof(&T) == return);


T The type to check


A bool


static real func(ref int) { return 0; }
static void prop() @property { }
class C
    real method(ref int) { return 0; }
    real prop() @property { return 0; }
auto c = new C;
auto fp = &func;
auto dg = &c.method;

static assert( isSomeFunction!func);
static assert( isSomeFunction!prop);
static assert( isSomeFunction!(C.method));
static assert( isSomeFunction!(C.prop));
static assert( isSomeFunction!(c.prop));
static assert( isSomeFunction!fp);
static assert( isSomeFunction!dg);

real val;
static assert(!isSomeFunction!int);
static assert(!isSomeFunction!val);


Walter Bright, Tomasz Stachowiak (isExpressions), Andrei Alexandrescu, Shin Fujishiro, Robert Clipsham, David Nadlinger, Kenji Hara, Shoichi Kato


Boost License 1.0.