The title explains it enough I thnk. I don't want to use a for loop with @intCast tho, as it seems not efficent. So I wanted to ask if there is a more efficent way?
#Cast a []const u8 to []const u21
elder siren
Maybe std.ArrayListUnmanaged has a method to do the cast, because what I am doing is:
try line.appendSlice(allocator, s);```
where s is the []const u8 and line a std.ArrayList(u21)
glacial mantle
there is no cast that applies here because u8 and u21 are different sizes
and what exactly are you looking for here, because u21 is a very strange integer
elder siren
and what exactly are you looking for here, because u21 is a very strange integer
@as(u21, @intCast(c))
where c = u8
elder siren
and what exactly are you looking for here, because u21 is a very strange integer
unicode character
glacial mantle
and the []const u8 is UTF8?
elder siren
and the `[]const u8` is UTF8?
uhhhh not sure
glacial mantle
because what you likely want here is a unicode iterator; the slice of u8 and the slice of unicode codepoints are very likely different lengths
because utf-8 is a multi-byte encoding
elder siren
no []const u8 is a single line of file
var split = std.mem.splitScalar(u8, data, '\n');
while (split.next()) |s| {
var line = Line{};
errdefer line.deinit(allocator);
try line.appendSlice(allocator, s);
try tab.lines.append(line);
}```and the file is using what encoding?
elder siren
oh wait I think I get what you're saying
glacial mantle
because the encoding determines how each codepoint is encoded in those bytes
elder siren
because the encoding determines how each codepoint is encoded in those bytes
yeah...
var iter = std.unicode.Utf8Iterator{ .bytes = s, .i = 0 };
while (iter.nextCodepoint()) |unicode_char| {
try line.append(allocator, unicode_char);
}
try tab.lines.append(line);
like this?
where s is []const u8
glacial mantle
you're intended to obtain a Utf8Iterator from a Utf8View
but otherwise yes
because Utf8Iterator requires validated utf8
elder siren
because Utf8Iterator requires validated utf8
hmmm okay
elder siren
because Utf8Iterator requires validated utf8
so
var view = try std.unicode.Utf8View.init(s);
var iter = view.iterator()
view can be const, but yes
elder siren
@glacial mantle sorry for the ping, but is there a way to convert []const u21 to []u8?
glacial mantle
utf8Encode
glacial mantle
usually in this form: https://github.com/ziglang/zig/blob/master/lib/std/unicode.zig#L866-L869