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;
    }
}