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Check whether the given Unicode code point is valid.
bool isValidDchar (
) pure nothrow @nogc @safe;
|c||code point to check|
true if and only if
c is a valid Unicode code point
'\uFFFF' are considered valid by
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));
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