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Converts an ASCII letter to uppercase.
auto toUpper(C) (
if (is(C : dchar));
|c|| Any type which implicitly converts to |
writeln(toUpper('a')); // 'A' writeln(toUpper('A')); // 'A' writeln(toUpper('#')); // '#' // N.B.: Non-ASCII Unicode lowercase letters are not converted. writeln(toUpper('á')); // 'á'