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Enum member std.traits.isAggregateType
Detect whether type T
is an aggregate type.
enum isAggregateType(T)
= is(T == struct) || is(T == union) || is(T == class) || is(T == interface);
Example
class C;
union U;
struct S;
interface I;
static assert( isAggregateType!C);
static assert( isAggregateType!U);
static assert( isAggregateType!S);
static assert( isAggregateType!I);
static assert(!isAggregateType!void);
static assert(!isAggregateType!string);
static assert(!isAggregateType!(int[]));
static assert(!isAggregateType!(C[string]));
static assert(!isAggregateType!(void delegate(int)));
}
/**
* Returns `true` if T can be iterated over using a `foreach` loop with
* a single loop variable of automatically inferred type, regardless of how
* the `foreach` loop is implemented. This includes ranges, structs/classes
* that define `opApply` with a single loop variable, and builtin dynamic,
* static and associative arrays.
*/
enum bool isIterable(T) = is(typeof({ foreach (elem; T .init) {}
Authors
Walter Bright,
Tomasz Stachowiak (isExpressions
),
Andrei Alexandrescu,
Shin Fujishiro,
Robert Clipsham,
David Nadlinger,
Kenji Hara,
Shoichi Kato
License
Copyright © 1999-2022 by the D Language Foundation | Page generated by ddox.