@Override
public Type typecheck(Environment env, Optional<Type> expected) {
Environment outerEnv =
env.lookupBinding("oev", TSLBlock.OuterTypecheckBinding.class)
.map(oeb -> oeb.getStore())
.orElse(Environment.getEmptyEnvironment());
Type exnType = exn.typecheck(outerEnv, expected);
cached = Optional.of(exnType);
return exnType;
}
public ExtensionResolver(EnvironmentResolver env, Binding binding) {
this.env = env;
this.iEnv = Environment.getEmptyEnvironment().extend(binding);
}