Moved all curnel code into curnel/, and split the two kernel modules
into separate files. Now the trusted core and the module/#lang stuff are
in separate files. The #lang is now reprovided by "cur.rkt", which
should also provide core agnostic sugar.
* Various style fixes
* Standardize the proof state interface/naming a little.
* Reorganized base.rkt; now easier to read
* Fixed some mismatch code/documentation
* Renamed "basic" to "standard"; basic was too close to base, and not
really helpful.
* Added the Sartactics library, provides a sassy wrapper around the basic
tactics.
* Added prefix-in, although it probably only works for macros
* Better syntax for define-tactic
elim tests now use the correct API, but typing is a problem without ≡
while typing. I think I could strongly normalize types and such while
typing checking...
Cur can now type check elim without a discriminant. Unfortunately, this
breaks the API of elim. Fortunately, the typing rule for elim is easier
to understand, and it is easier to partially apply elim.
These fixes are merged because properly testing the latter requires
having the former, while properly implementing the former is made
simpler by having the latter.
Fixed handling of names/substitution
===
* Added capture-avoiding substitution. Closes#7
* Added equivalence during typing checking, including α-equivalence and
limited β-equivalence. Closes#8
* Exposed better typing-check reflection features to allow typing
checking modulo equivalence.
* Tweaked QED macro to use new type-checking reflection feature.
Fixed inductive families
===
The implementation of inductive families is now based on the theoretical
models of inductive families, rather than an ad-hoc non-dependent
pattern matcher.
* Removed case and fix from Cur and Curnel. They are replaced by elim,
the generic eliminator for inductive families. Closes#5. Since fix is
no more, also closes#2.
* Elimination of false works! Closes#4.
* Changed uses of case to elim in Curnel
* Changed uses of case* in Cur to use eliminators. Breaks case* API.
* Fixed Coq generator to use eliminators
* Fixed Latex generator
