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Re-implement Tag metaprogramming utility

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kayomn 2023-04-23 13:40:49 +01:00
parent a7605c6ffa
commit d1110d8683
1 changed files with 8 additions and 0 deletions
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8
source/coral/io.zig
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@ -84,6 +84,14 @@ pub const Reader = struct {
} }
}; };
pub fn Tag(comptime Element: type) type {
return switch (@typeInfo(Element)) {
.Enum => |info| info.tag_type,
.Union => |info| info.tag_type orelse @compileError(@typeName(Element) ++ " has no tag type"),
else => @compileError("expected enum or union type, found '" ++ @typeName(Element) ++ "'"),
};
}
pub const WriteError = error{ pub const WriteError = error{
IoUnavailable, IoUnavailable,
}; };