Introduced new model for resolution result: tree of ResolvedAtoms.
Moved all postprocessing for arguments to front-end module.
Do not create freshDescriptor -- use freshTypeSubstitutor directly.
Removed Candidates for variables+invoke.
Add lazy way for argument analysis -- do not analyze all arguments
if we have subtyping error in first argument, but if we want report
all errors, then all arguments checks will be performed.
Future improvements:
- optimize constraint system usage inside ResolutionCandidate
- improve constraint system API
- improve diagnostic handlers
Stanislav Erokhin
cb1270836c