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Function std.ascii.isUpper

Prototype

bool isUpper(
  dchar c
) pure nothrow @nogc @safe;

Parameters

NameDescription
c The character to test.

Returns

Whether c is an uppercase ASCII letter (A..Z).

Example

assert( isUpper('A'));
assert(!isUpper('a'));
assert(!isUpper('#'));

// N.B.: does not return true for non-ASCII Unicode uppercase letters
assert(!isUpper('á'));
assert(!isUpper('Á'));

Authors

Walter Bright and Jonathan M Davis

License

Boost License 1.0.

Comments