metamodel for late attributes

[tombentley]

class Example() {
    shared late Integer i;
}
print(type(`Example.i`));

prints com.redhat.ceylon.compiler.java.runtime.metamodel::AppliedAttribute<example::Example,ceylon.language::Integer,Nothing>, so the Setter type parameter of Attribute is Nothing. This means I cannot call set() on the bound Value<Integer,Nothing> I obtain from that Attriibute.

If I try to use setIfAssignable() I get an exception "Value is not mutable".

This makes late attributes pretty much unusable from the metamodel.

[jvasileff]

Some way of assigning to non-variable late attributes will be necessary in order to implement dependency injection in Ceylon. Constructor injection isn't always an option.

[jvasileff]

And I suppose without ceylon/ceylon-compiler#2153, attribute-injection would be my preferred form of injection :).

[FroMage]

Moving to 1.3.