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Fix fmt UTF-8 characters as fill (#18533)

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Co-authored-by: Jacob Young <jacobly0@users.noreply.github.com>
This commit is contained in:
vinnichase
2024-01-14 04:47:03 +01:00
committed by GitHub
parent b723296e1f
commit 279607cae5
3 changed files with 88 additions and 34 deletions
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lib/std/unicode.zig
+20
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@@ -69,6 +69,19 @@ pub fn utf8Encode(c: u21, out: []u8) !u3 {
return length;
}
pub inline fn utf8EncodeComptime(comptime c: u21) [
utf8CodepointSequenceLength(c) catch |err|
@compileError(@errorName(err))
]u8 {
comptime var result: [
utf8CodepointSequenceLength(c) catch
unreachable
]u8 = undefined;
comptime assert((utf8Encode(c, &result) catch |err|
@compileError(@errorName(err))) == result.len);
return result;
}
const Utf8DecodeError = Utf8Decode2Error || Utf8Decode3Error || Utf8Decode4Error;
/// Decodes the UTF-8 codepoint encoded in the given slice of bytes.
@@ -525,6 +538,13 @@ fn testUtf8Encode() !void {
try testing.expect(array[3] == 0b10001000);
}
test "utf8 encode comptime" {
try testing.expectEqualSlices(u8, "€", &utf8EncodeComptime('€'));
try testing.expectEqualSlices(u8, "$", &utf8EncodeComptime('$'));
try testing.expectEqualSlices(u8, "¢", &utf8EncodeComptime('¢'));
try testing.expectEqualSlices(u8, "𐍈", &utf8EncodeComptime('𐍈'));
}
test "utf8 encode error" {
try comptime testUtf8EncodeError();
try testUtf8EncodeError();