8 Commits

Author	SHA1	Message	Date
Edwin Brady	ad632d825d	Remove linearity subtyping ... It's disappointing to have to do this, but I think necessary because various issue reports have shown it to be unsound (at least as far as inference goes) and, at the very least, confusing. This patch brings us back to the basic rules of QTT. On the one hand, this makes the 1 multiplicity less useful, because it means we can't flag arguments as being used exactly once which would be useful for optimisation purposes as well as precision in the type. On the other hand, it removes some complexity (and a hack) from unification, and has the advantage of being correct! Also, I still consider the 1 multiplicity an experiment. We can still do interesting things like protocol state tracking, which is my primary motivation at least. Ideally, if the 1 multiplicity is going to be more generall useful, we'll need some kind of way of doing multiplicity polymorphism in the future. I don't think subtyping is the way (I've pretty much always come to regret adding some form of subtyping). Fixes #73 (and maybe some others).	2020-12-27 19:58:35 +00:00
Yu Zhang	08a35d694c	Improving error messages (#786) ... Co-authored-by: Guillaume ALLAIS <guillaume.allais@ens-lyon.org>	2020-11-26 11:35:55 +00:00
Giuseppe Lomurno	607352a191	Error suggestions	2020-08-18 19:25:36 +01:00
Giuseppe Lomurno	6298a6741d	Adds bounds to compiler parser ... - Added primitive to compiler parser for precise text boundaries - Reworked parser with the new primitive	2020-08-18 19:25:36 +01:00
Giuseppe Lomurno	5e9837828a	Implementations and errors ... - Added initial implementations for terms and values - Error messages converted to pretty printer - Colorization for error messages - Color and console width option both as command line and repl command	2020-08-18 19:25:36 +01:00
Giuseppe Lomurno	df4f990b3c	PTerm and error intial prettyprinting	2020-08-18 19:25:36 +01:00
Giuseppe Lomurno	e9d46a2650	Fixed tests	2020-06-11 22:46:36 +02:00
Edwin Brady	a972778eab	Add test script ... They don't all pass yet, for minor reasons. Coming shortly... Unfortunately the startup overhead for chez is really noticeable here!	2020-05-19 18:25:18 +01:00