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Enum member std.traits.isBoolean

Detect whether T is a built-in boolean type or enum of boolean base type.

enum isBoolean(T) = __traits(isUnsigned, T) && is(T : bool);


static assert( isBoolean!bool);
enum EB : bool { a = true }
static assert( isBoolean!EB);

struct SubTypeOfBool
    bool val;
    alias val this;
static assert(!isBoolean!(SubTypeOfBool));


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


Boost License 1.0.