53 Commits

Author	SHA1	Message	Date
Joe Groff	61c674b82f	SILGen: Include refined protocol conformances in witness tables. ... When a type conforms to a protocol that refines another protocol, emit the witness table for the base protocol, and drop a reference into the witness table for the derived protocol. Keep track of what conformances we've already emitted so we don't emit redundant witness tables when types conform redundantly to base protocols or have multiple references to a base protocol via a refinement diamond. Swift SVN r11263	2013-12-13 19:23:22 +00:00
Joe Groff	88e5dece28	SILGen: Implement a visitor to produce witness tables. ... Walk the ProtocolConformances of type and extension decls to produce SILWitnessTables for them. Work out the type of the witness function by applying substitutions from the witness map and lowering it at the abstraction level of the requirement, then emit a symbol for the witness function (but don't emit the body of the witness function just yet). Swift SVN r11143	2013-12-11 21:40:44 +00:00
Joe Groff	2a7de8f495	Introduce a SILWitnessTable class. ... We will generate these in SILGen when we see a NormalProtocolConformance, to provide a mapping of method requirements to witnesses for types. Swift SVN r10900	2013-12-06 01:32:36 +00:00