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Function std.ascii.toLower

Converts an ASCII letter to lowercase.

auto toLower(C) (
  C c
if (is(C : dchar));


c A character of any type that implicitly converts to dchar. In the case where it's a built-in type, or an enum of a built-in type, Unqual!(OriginalType!C) is returned, whereas if it's a user-defined type, dchar is returned.


The corresponding lowercase letter, if c is an uppercase ASCII character, otherwise c itself.


writeln(toLower('a')); // 'a'
writeln(toLower('A')); // 'a'
writeln(toLower('#')); // '#'

// N.B.: Non-ASCII Unicode uppercase letters are not converted.
writeln(toLower('Á')); // 'Á'


Walter Bright and Jonathan M Davis


Boost License 1.0.