@tclem and I found ourselves wanting an arrow-like combinator that
promotes a given function to a Matcher. While I think an Arrow
instance is going a little overboard, there's no harm in adding a
'purely' function, the naming of which is commensurate with the
rewriting DSL.
This also renames the module, since there's not anything really
abstract about matching (indeed, it is quite concrete).
This looks like a big patch, but it's very straightforward: no
behavior has changed.
After the umpteenth time spent hitting a compile error because I
passed a `FilePath` rather than a `File` to `readBlobFromPath`, I
decided to finally make the needed refactors to Semantic.IO, and to
split off the `File` type and `Files` effect. This patch:
* adds the `MonadIO` class to `Prologue`'s export list
* moves `File` into `Data.File`
* moves `Handle` into `Data.Handle`
* moves `Files` into `Semantic.Task.Files`
* moves functions for reading blobs into `Data.Blob`
* keeps general IO helpers in Semantic.IO
* renames `readFile` to `readBlobFromFile`
* renames `readBlobFromPath` to `readBlobFromFile'`
This should have a positive effect on compile times and ease of
navigation throughout the codebase.
Prefixes on data constructors are generally an antipattern in Haskell:
if you're concerned about name collisions, have clients use qualified
imports for whatever modules they need. As such, this removes the T-
prefixes from the `Token` and `Context` types. This also renames
Context to Scope, which is a more exact and readable name.
