Closes#1185.
This mostly reverts "Add support for multi-`let` (#675)" /
8a5bfaa3b9.
Also:
* Add fields for Src
This is useful for to make 'Note's less noisy during debugging:
first srcText expr
Fixes#973
The formatter was behaving inconsistently for multi-line strings
depending on whether or not they were at the top level or nested as
a subexpression. For example, the same multi-line string would be
rendered in multi-line form if it was at the top level and rendered
compactly if nested within another expression.
The root cause was that the pretty-printing logic was missing a top-level
`Pretty.group` call (which is the function responsible for enabling
compact representations if they fit), which this change fixes.
Related to: https://github.com/dhall-lang/dhall-haskell/issues/1039
We'll probably never see indices that exceed the space of an `Int` and
the interpreter would probably not be able to handle 9223372036854775807
nested binders anyway.
... as standardized in https://github.com/dhall-lang/dhall-lang/pull/438
This also adds `dhall-json` support for empty alternatives
In particular, this translates empty alternatives to strings encoding the alternative name
```haskell
-- ./example.dhall
let Role = < Wizard | Fighter | Rogue >
in [ Role.Wizard, Role.Fighter ]
```
```
$ dhall-to-json <<< './example.dhall'
["Wizard","Fighter"]
```
Fixes#832 832
This includes two changes:
* Fix a missing newline at the end of `dhall format` output when not using
the `--inplace` option
* Better align ASCII output
Fixes https://github.com/dhall-lang/dhall-lang/issues/267
According to the standard, Unicode characters up to `0x10FFFF` do not
require escaping. See:
33cab24f8e/standard/dhall.abnf (L192)
... so we can preserve them when pretty-printing Dhall expressions.
Note that the current code still does not comply with the standard for Unicode
characters beyond `0x10FFFF`, but I'll defer fixing that to a subsequent
change.
The motivation for this change is:
* To catch build failures in downstream packages whenever we make a breaking
change to the `dhall` API
* To reduce the amount of work I need in order to cut a release for all of
these packages
* To better share Nix/CI-related logic between the projects
Note that I have not yet migrated `dhall-nix` in. I'm waiting for
https://github.com/dhall-lang/dhall-nix/issues/17 to be fixed since
`dhall-nix` is incompatible with later versions of `megaparsec` due to
`hnix`.
