Commit Graph

30 Commits

Author SHA1 Message Date
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
efc879b955 Add new line primitive, bump version, allow bare filepaths 2019-12-03 19:44:59 +13:00
Yehuda Katz
a1e21828d6 Fix tests 2019-12-02 11:02:57 -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
Yehuda Katz
f70c6d5d48 Extract nu_source into a crate
This commit extracts Tag, Span, Text, as well as source-related debug
facilities into a new crate called nu_source.

This change is much bigger than one might have expected because the
previous code relied heavily on implementing inherent methods on
`Tagged<T>` and `Spanned<T>`, which is no longer possible.

As a result, this change creates more concrete types instead of using
`Tagged<T>`. One notable example: Tagged<Value> became Value, and Value
became UntaggedValue.

This change clarifies the intent of the code in many places, but it does
make it a big change.
2019-11-25 07:37:33 -08:00
Yehuda Katz
cdb0eeafa2 --no-edit 2019-11-21 14:22:32 -08:00
Jonathan Turner
6231367bc8 Make duration its own primitive 2019-11-17 18:48:48 +13:00
Jonathan Turner
193b00764b
Stream support (#812)
* Moves off of draining between filters. Instead, the sink will pull on the stream, and will drain element-wise. This moves the whole stream to being lazy.
* Adds ctrl-c support and connects it into some of the key points where we pull on the stream. If a ctrl-c is detect, we immediately halt pulling on the stream and return to the prompt.
* Moves away from having a SourceMap where anchor locations are stored. Now AnchorLocation is kept directly in the Tag.
* To make this possible, split tag and span. Span is largely used in the parser and is copyable. Tag is now no longer copyable.
2019-10-13 17:12:43 +13:00
est31
9891e5ab81 Use async-stream crate to replace most async_stream_block invocations 2019-09-26 02:39:20 +02:00
Yehuda Katz
ab915f1c44 Revert "Revert "Migrate most uses of the Span concept to Tag""
This reverts commit bee7c5639c.
2019-09-14 11:30:24 -05:00
Jonathan Turner
189877e4dd Improve help and make binary a primitive 2019-09-13 06:29:16 +12:00
Jonathan Turner
bee7c5639c
Revert "Migrate most uses of the Span concept to Tag" 2019-09-11 19:53:05 +12:00
Yehuda Katz
58b7800172 Migrate most uses of the Span concept to Tag
Also migrate mv, rm and commands like that to taking a
SyntaxType::Pattern instead of a SyntaxType::Path for their first
argument.
2019-09-10 20:41:03 -07:00
Yehuda Katz
b15bb2c667 Added glob patterns to the syntax shapes
Bare words now represent literal file names, and globs are a different
syntax shape called "Pattern". This allows commands like `cp` to ask for
a pattern as a source and a literal file as a target.

This also means that attempting to pass a glob to a command that expects
a literal path will produce an error.
2019-09-10 09:00:50 -07:00
Jonathan Turner
dcd97b6346 Move internal terminology to tables/rows 2019-09-06 04:23:42 +12:00
Jonathan Turner
0a9897c5ca Move us away from mixing OOP and spreadsheet to just spreadsheet 2019-09-05 04:29:49 +12:00
Jonathan Turner
479f0a566e Covert to_* commands to work on whole table 2019-09-04 18:48:40 +12:00
Yehuda Katz
8a29c9e6ab Migrated numerics to BigInt/BigDecimal
This commit migrates Value's numeric types to BigInt and BigDecimal. The
basic idea is that overflow errors aren't great in a shell environment,
and not really necessary.

The main immediate consequence is that new errors can occur when
serializing Nu values to other formats. You can see this in changes to
the various serialization formats (JSON, TOML, etc.). There's a new
`CoerceInto` trait that uses the `ToPrimitive` trait from `num_traits`
to attempt to coerce a `BigNum` or `BigDecimal` into a target type, and
produces a `RangeError` (kind of `ShellError`) if the coercion fails.

Another possible future consequence is that certain performance-critical
numeric operations might be too slow. If that happens, we can introduce
specialized numeric types to help improve the performance of those
situations, based on the real-world experience.
2019-09-01 21:00:30 -07:00
Andrés N. Robalino
ca0c6eaf58 This commit introduces a basic help feature. We can go to it
with the `help` command to explore and list all commands available.

Enter will also try to see if the location to be entered is an existing
Nu command, if it is it will let you inspect the command under `help`.

This provides baseline needed so we can iterate on it.
2019-08-31 19:06:11 -05:00
Yehuda Katz
138b5af82b Basic support for decimal numbers
This commit is more substantial than it looks: there was basically no
real support for decimals before, and that impacted values all the way
through.

I also made Size contain a decimal instead of an integer (`1.6kb` is a
reasonable thing to type), which impacted a bunch of code.

The biggest impact of this commit is that it creates many more possible
ways for valid nu types to fail to serialize as toml, json, etc. which
typically can't support the full range of Decimal (or Bigint, which I
also think we should support). This commit makes to-toml fallible, and a
similar effort is necessary for the rest of the serializations.

We also need to figure out how to clearly communicate to users what has
happened, but failing to serialize to toml seems clearly superior to me
than weird errors in basic math operations.
2019-08-30 21:05:32 -07:00
Odin Dutton
d71206ed9e Implement WholeStreamCommand for all remaining commands 2019-08-19 15:16:39 +10:00
Jonathan Turner
aadacc2d36 Merge master 2019-08-09 16:51:21 +12:00
Jonathan Turner
ae5b781159 More touchups to errors 2019-08-06 15:03:13 +12:00
Jonathan Turner
99671b8ffc Move more parts to tags and away from spans 2019-08-05 20:54:29 +12:00
Jonathan Turner
462f783fac initial change to Tagged<Value> 2019-08-01 13:58:42 +12:00
Jonathan Turner
a09361698e Update plugin protocol for begin, and create new sys plugin 2019-07-27 19:45:00 +12:00
Yehuda Katz
5a8e041a48 Tests pass! 2019-07-23 15:22:11 -07:00
Jonathan Turner
15507f00fc Introduce CallInfo, which abstracts args, name_span, and source_map 2019-07-20 14:27:10 +12:00
Jonathan Turner
2ed46046bd Cleanup for upcoming release 2019-07-17 07:10:25 +12:00
Jonathan Turner
b07e1ccbf7 Add missing file 2019-07-16 16:05:38 +12:00