This PR adds an `--update` flag to the `tree-sitter test` command, which adds the ability to replace the _expected_ output in the corpus.txt with the _actual_ output produced by the parser, that is, we can now simply use this `--update` flag to write all the corresponding parser output back to the corpus.txt, and we just need to check the output without typing its actual sexp.
- use the same output format as `tree-sitter parse`, except there won't be any position information printed.
- the corpus.txt won't be touched if there's no difference between the _expected_ output and the _actual_ output in that file.
- if there're differences between _expected_ and _actual_, _expected_ will be replaced by _actual_ and the whole file will be reformatted, i.e., all the output sexp will be formatted just like the output from `tree-sitter parse` and all the delimiters `===`/`---` will be normalized as 80-column long.
- this flag also works with `--filter` flag.
This allows you to assert about fields in tests. But if your test
s-expression does *not* include fields, the fields will be stripped from
the regexp before comparison.
* Rename parse_str to parse and make it polymorphic.
* Rename parse_utf8 to parse_with, since it is now the callback-based
version of parse
* Add a parse_utf16 method analogous to parse
* Rename existing parse_utf16 method to parse_utf16_with
This brings in the changes from tree-sitter/rust-tree-sitter#5
* Structure `cli` crate as both a library and an executable, so that
benchmarks can import code from the crate.
* Import macros in the Rust 2018 style.
