body.compile_to_c(v)
var e = v.register(result.as(not null))
v.add_instr("once_value_{i} = {e};")
+ v.add_instr("register_static_object(&once_value_{i});")
if res.stype.is_nullable then v.add_instr("once_bool_{i} = true;")
v.unindent
v.add_instr("} else {e} = once_value_{i};")