Commit Graph

13 Commits

Author SHA1 Message Date
Jonathan Turner
14817ef229 Subcrate versions 2019-12-18 05:18:10 +13:00
Jonathan Turner
98233dcec1 Subcrate versions 2019-12-18 05:09:53 +13:00
Yehuda Katz
57af9b5040 Add Range and start Signature support
This commit contains two improvements:

- Support for a Range syntax (and a corresponding Range value)
- Work towards a signature syntax

Implementing the Range syntax resulted in cleaning up how operators in
the core syntax works. There are now two kinds of infix operators

- tight operators (`.` and `..`)
- loose operators

Tight operators may not be interspersed (`$it.left..$it.right` is a
syntax error). Loose operators require whitespace on both sides of the
operator, and can be arbitrarily interspersed. Precedence is left to
right in the core syntax.

Note that delimited syntax (like `( ... )` or `[ ... ]`) is a single
token node in the core syntax. A single token node can be parsed from
beginning to end in a context-free manner.

The rule for `.` is `<token node>.<member>`. The rule for `..` is
`<token node>..<token node>`.

Loose operators all have the same syntactic rule: `<token
node><space><loose op><space><token node>`.

The second aspect of this pull request is the beginning of support for a
signature syntax. Before implementing signatures, a necessary
prerequisite is for the core syntax to support multi-line programs.

That work establishes a few things:

- `;` and newlines are handled in the core grammar, and both count as
  "separators"
- line comments begin with `#` and continue until the end of the line

In this commit, multi-token productions in the core grammar can use
separators interchangably with spaces. However, I think we will
ultimately want a different rule preventing separators from occurring
before an infix operator, so that the end of a line is always
unambiguous. This would avoid gratuitous differences between modules and
repl usage.

We already effectively have this rule, because otherwise `x<newline> |
y` would be a single pipeline, but of course that wouldn't work.
2019-12-11 16:41:07 -08:00
Jonathan Turner
9f702fe01a Move the remainder of the plugins to crates 2019-12-10 07:39:51 +13:00
Jonathan Turner
91784218c0 Upgrade some dependencies 2019-12-09 06:56:21 +13:00
Thibaut Brandscheid
683f4c35d9 Fix more Clippy warnings
cargo clippy -- -W clippy::correctness
2019-12-07 21:04:58 +01:00
Jonathan Turner
38b7a3e32b WIP move post/fetch to plugins 2019-12-07 16:46:05 +13:00
Jonathan Turner
d12c16a331 Extract ps and sys subcrates. Move helper methods to UntaggedValue 2019-12-05 08:52:31 +13:00
Jonathan Turner
1fcf671ca4 Re-enable the textview plugin, now its own crate 2019-12-04 19:38:40 +13:00
Jonathan Turner
efc879b955 Add new line primitive, bump version, allow bare filepaths 2019-12-03 19:44:59 +13:00
Yehuda Katz
87dbd3d5ac Extract build.rs 2019-12-02 13:14:51 -08:00
Yehuda Katz
4115634bfc Try to re-apply #1039 2019-12-02 11:02:58 -08:00
Yehuda Katz
e4226def16 Extract core stuff into own crates
This commit extracts five new crates:

- nu-source, which contains the core source-code handling logic in Nu,
  including Text, Span, and also the pretty.rs-based debug logic
- nu-parser, which is the parser and expander logic
- nu-protocol, which is the bulk of the types and basic conveniences
  used by plugins
- nu-errors, which contains ShellError, ParseError and error handling
  conveniences
- nu-textview, which is the textview plugin extracted into a crate

One of the major consequences of this refactor is that it's no longer
possible to `impl X for Spanned<Y>` outside of the `nu-source` crate, so
a lot of types became more concrete (Value became a concrete type
instead of Spanned<Value>, for example).

This also turned a number of inherent methods in the main nu crate into
plain functions (impl Value {} became a bunch of functions in the
`value` namespace in `crate::data::value`).
2019-12-02 10:54:12 -08:00