Function utf16CodepointSequenceLength [src]

Returns how many code units the UTF-16 representation would require for the given codepoint.

Prototype

pub fn utf16CodepointSequenceLength(c: u21) !u2

Parameters

c: u21

Example

 test utf16CodepointSequenceLength {
    try testing.expectEqual(@as(u2, 1), try utf16CodepointSequenceLength('a'));
    try testing.expectEqual(@as(u2, 1), try utf16CodepointSequenceLength(0xFFFF));
    try testing.expectEqual(@as(u2, 2), try utf16CodepointSequenceLength(0x10000));
    try testing.expectEqual(@as(u2, 2), try utf16CodepointSequenceLength(0x10FFFF));
    try testing.expectError(error.CodepointTooLarge, utf16CodepointSequenceLength(0x110000));
}

Source

  pub fn utf16CodepointSequenceLength(c: u21) !u2 {
    if (c <= 0xFFFF) return 1;
    if (c <= 0x10FFFF) return 2;
    return error.CodepointTooLarge;
}  