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Enum std.traits.member isNarrowString
Detect whether type T is a narrow string.
All arrays that use char, wchar, and their qualified versions are narrow strings. (Those include string and wstring).
Declaration
enum isNarrowString(T) = (is(T : const(char[])) || is(T : const(wchar[]))) && !isAggregateType!T && !isStaticArray!T;
Authors
Walter Bright,
Tomasz Stachowiak (isExpressions