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Function std.utf.isValidDchar

Check whether the given Unicode code point is valid.

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


c code point to check


true if and only if c is a valid Unicode code point


'\uFFFE' and '\uFFFF' are considered valid by isValidDchar, as they are permitted for internal use by an application, but they are not allowed for interchange by the Unicode standard.


assert( isValidDchar(cast(dchar) 0x41));
assert( isValidDchar(cast(dchar) 0x00));
assert(!isValidDchar(cast(dchar) 0xD800));
assert(!isValidDchar(cast(dchar) 0x11FFFF));


Walter Bright and Jonathan M Davis


Boost License 1.0.