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Function std.ascii.toUpper
Converts an ASCII letter to uppercase.
Prototype
auto toUpper(C)( C c ) if (is(C : dchar));
Parameters
| Name | Description |
|---|---|
| c | Any type which 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. |
Returns
The corresponding uppercase letter, if clowercase ASCII
character, otherwise c
Example
assert(toUpper('a') == 'A');
assert(toUpper('A') == 'A');
assert(toUpper('#') == '#');
// N.B.: Non-ASCII Unicode lowercase letters are not converted.
assert(toUpper('á') == 'á');
Authors
Walter Bright and Jonathan M Davis