0b7d987699
@kha I have added support for opaque constants to the old C++ frontend, and made sure the new frontend can still parse `library/init/core.lean`. The kernel should enforce that opaque constants are really opaque, and the following example should fail ``` constant x : nat := 0 theorem foo : x = 0 := rfl ``` If it doesn't, it is a bug. Here are some remaining issues: 1- `environment.mk_empty` is currently an axiom because we cannot create an inhabitant of an opaque type. A possible solution is to use `option environment` instead of `environment`. 2- There is no support for opaque constants in the new frontend. However, I modified it to handle axioms, and fixed the literal values with decl_cmd_kind. I tried to mark some of my changes with comments, but it is probably much easier for you to just check the commit change list. 3- I did not add any support for automatically constructing `e` at `constant x : t := e`. I think we can do this later after we replace the old frontend with the new one. BTW, it took only a few minutes to provide the inhabitants manually. |
||
|---|---|---|
| .. | ||
| control | ||
| data | ||
| lean | ||
| coe.lean | ||
| core.lean | ||
| default.lean | ||
| env_ext.lean | ||
| fix.lean | ||
| function.lean | ||
| init.md | ||
| io.lean | ||
| platform.lean | ||
| util.lean | ||
| wf.lean | ||