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Alias `std.traits.ForeachType`

Returns the inferred type of the loop variable when a variable of type T is iterated over using a foreach loop with a single loop variable and automatically inferred return type. Note that this may not be the same as std.range.ElementType!Range in the case of narrow strings, or if T has both opApply and a range interface.


						
				alias ForeachType(T)
				 = ReturnType!(typeof((inoutintx=0){foreach(elem;T.init){returnelem;}assert(0);}));

Example

static assert(is(ForeachType!(uint[]) == uint));
static assert(is(ForeachType!string == immutable(char)));
static assert(is(ForeachType!(string[string]) == string));
static assert(is(ForeachType!(inout(int)[]) == inout(int)));

Authors

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

License

Boost License 1.0.