This prevents display of shadowed names from case blocks/where clauses
that are now unusable. It does mean that constraint arguments aren't
displayed, unless given an explicit name - this may not be good, since
we might want to know which constraints are in scope, so it may yet need
a little tweaking.
They're global, and so we don't reset per file, so we might get
duplicates, so it's much quicker to store as a map even though we'd
expect few of them overall.
Gets the OS info from the host compiler, which we'll need to be careful
with when bootstrapping (since maybe we'll distribute generated chez or
racket as a starting point for bootstrapping...)
It's a big patch, but the summary is that it's okay to use a pattern in
an erased position if either:
- the pattern can also be solved by unification (this is the same as
'dot patterns' for matching on non-constructor forms)
- the argument position is detaggable w.r.t. non-erased arguments, which
means we can tell which pattern it is without pattern matching
The second case, in particular, means we can still pattern match on
proof terms which turn out to be irrelevant, especially Refl.
Fixes#178
This changes the behaviour of 'auto' implicits so that by default they
return the first result, rather than checking for unique results. This
is consistent with Idris 1. However, we still want to check for
uniqueness somtimes (for example, with interface search, which should
reject overlapping results) so the 'uniqueSearch' option means that any
auto implicit search for the type should check uniqueness of results.
Fixes#169
This is further progress towards a metaprogramming system in a form
similar to Elaborator Reflection or Template Haskell, but trying to
avoid leaking too many implementation details of the elaborator itself.
Also include proof the tail-recursive versions are extensionally equivalent to the non-tail-recursive one
I'm a bit worried that some of those proofs came through, as
visibility modifiers should get in the way. If they cause problems at
some future point, just delete/comment them out.
This is the result of running the command:
$ find . -name '*.idr' -type f -exec sed -i -E 's/\s+$//' {} +
I confirmed before running it that this would not affect any markdown
formatting in documentation comments.
These functions use the NonEmpty predicate type in order to prove
that the operation will be valid.
Implementations copied from Idris1's Prelude.List module, except without
expanding the auto implicit argument.
