pub const Alias = struct {
    global: Global.Index,
    thread_local: ThreadLocal = .default,
    aliasee: Constant = .no_init,

    pub const Index = enum(u32) {
        none = std.math.maxInt(u32),
        _,

        pub fn ptr(self: Index, builder: *Builder) *Alias {
            return &builder.aliases.items[@intFromEnum(self)];
        }

        pub fn ptrConst(self: Index, builder: *const Builder) *const Alias {
            return &builder.aliases.items[@intFromEnum(self)];
        }

        pub fn name(self: Index, builder: *const Builder) StrtabString {
            return self.ptrConst(builder).global.name(builder);
        }

        pub fn rename(self: Index, new_name: StrtabString, builder: *Builder) Allocator.Error!void {
            return self.ptrConst(builder).global.rename(new_name, builder);
        }

        pub fn typeOf(self: Index, builder: *const Builder) Type {
            return self.ptrConst(builder).global.typeOf(builder);
        }

        pub fn toConst(self: Index, builder: *const Builder) Constant {
            return self.ptrConst(builder).global.toConst();
        }

        pub fn toValue(self: Index, builder: *const Builder) Value {
            return self.toConst(builder).toValue();
        }

        pub fn getAliasee(self: Index, builder: *const Builder) Global.Index {
            const aliasee = self.ptrConst(builder).aliasee.getBase(builder);
            assert(aliasee != .none);
            return aliasee;
        }

        pub fn setAliasee(self: Index, aliasee: Constant, builder: *Builder) void {
            self.ptr(builder).aliasee = aliasee;
        }
    };
}