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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);


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) {} 


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


Boost License 1.0.