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Enum std.traits.member isInstanceOf
Returns true if T is an instance of the template S.
Declaration
enum isInstanceOf(alias S, T) = is(T == S!Args, Args...);
Example
static struct Foo(T...) { }
static struct Bar(T...) { }
static struct Doo(T) { }
static struct ABC(int x) { }
static assert(isInstanceOf!(Foo, Foo!int));
static assert(!isInstanceOf!(Foo, Bar!int));
static assert(!isInstanceOf!(Foo, int));
static assert(isInstanceOf!(Doo, Doo!int));
static assert(isInstanceOf!(ABC, ABC!1));
static assert(!__traits(compiles, isInstanceOf!(Foo, Foo)));
Authors
Walter Bright,
Tomasz Stachowiak (isExpressions