Is there any function from std that is used to combine enums during comptime?
#Combine two enums during comptime
karmic tapir
karmic tapir
That was my hunch, working on an implementation.
@slender cobalt Btw, do you know if enum entries are allowed to hold the same value this would be valid, why?
const foo = enum(u8) {
bar = 255,
BAR = 255,
}
Ok error shows when I run, not with zls.
slender cobalt
zls doesn't show compile errors, only ast-check errors
blissful marsh
I made some notes for the combine_enums.zig file you posted in #zig yesterday.
- at comptime use @compileError instead of returning an error
- don't need to hash names, the compiler will make sure they're unique
- non exhaustive (is_exhaustive == false) means the enum can have non-named values. just set it to true indicating that the resulting enum can't have unnamed values.
- instead of main() with asserts, use a test block with std.testing.expectEqualStrings for field names and std.testing.expectEqual for values
- use if instead of switch for simple greater than comparison
if (len > 255) @compileError("Supports up to 255 for combined field lengths.");
var fields: [len]std.builtin.Type.EnumField = undefined;
@memcpy(fields[0..a_fields.len], a_fields);
for (0..b_fields.len) |i| {
fields[a_fields.len + i] = .{ .name = b_fields[i].name, .value = a_fields.len + i };
}
return @Type(.{ .Enum = .{
.tag_type = u8,
.fields = &fields,
.decls = &.{},
.is_exhaustive = true,
} });
@karmic tapir ☝️
karmic tapir
@blissful marsh I sent you the file I have been working on, I wish for feedback whenever you have time over.
blissful marsh
<@398569422035615744> I sent you the file I have been working on, I wish for fee...
I answered here. No reason for dm. Let me know if you have any questions.
blissful marsh
i still don't see any reason for hashing. just search previously assigned fields.
also, decls must always be empty so no reason for that code.
karmic tapir
ok I will improve it