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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.
Declaration
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