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version 2.106.0

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Function std.encoding.canEncode

Returns true iff it is possible to represent the specified codepoint in the encoding.

bool canEncode(E) (
  dchar c
);

The type of encoding cannot be deduced. Therefore, it is necessary to explicitly specify the encoding type.

Standards

Unicode 5.0, ASCII, ISO-8859-1, ISO-8859-2, WINDOWS-1250, WINDOWS-1251, WINDOWS-1252

Example

assert( canEncode!(Latin1Char)('A'));
assert( canEncode!(Latin2Char)('A'));
assert(!canEncode!(AsciiChar)('\u00A0'));
assert( canEncode!(Latin1Char)('\u00A0'));
assert( canEncode!(Latin2Char)('\u00A0'));
assert( canEncode!(Windows1250Char)('\u20AC'));
assert(!canEncode!(Windows1250Char)('\u20AD'));
assert(!canEncode!(Windows1250Char)('\uFFFD'));
assert( canEncode!(Windows1251Char)('\u0402'));
assert(!canEncode!(Windows1251Char)('\u20AD'));
assert(!canEncode!(Windows1251Char)('\uFFFD'));
assert( canEncode!(Windows1252Char)('\u20AC'));
assert(!canEncode!(Windows1252Char)('\u20AD'));
assert(!canEncode!(Windows1252Char)('\uFFFD'));
assert(!canEncode!(char)(cast(dchar) 0x110000));

Example

How to check an entire string 

import std.algorithm.searching : find;
import std.utf : byDchar;

assert("The quick brown fox"
    .byDchar
    .find!(x => !canEncode!AsciiChar(x))
    .empty);

Authors

Janice Caron

License

Boost License 1.0.