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https://github.com/nushell/nushell
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3e6e3a207c
* Put parse_definition related funcs into own module
* Add failing lexer test
* Implement Parsing of definition signature
This commit applied changes how the signature of a function is parsed. Before
there was a little bit of "quick-and-dirty" string-matching/parsing involved.
Now, a signature is a little bit more properly parsed.
The grammar of a definition signature understood by these parsing-functions is
as follows:
`[ (parameter | flag | <eol>)* ]`
where
parameter is:
`name (<:> type)? (<,> | <eol> | (#Comment <eol>))?`
flag is:
`--name (-shortform)? (<:> type)? (<,> | <eol> | (#Comment <eol>))?`
(Note: After the last item no <,> has to come.)
Note: It is now possible to pass comments to flags and parameters
Example:
[
d:int # The required d parameter
--x (-x):string # The all powerful x flag
--y (-y):int # The accompanying y flag
]
(Sadly there seems to be a bug (Or is this expected behaviour?) in the lexer, because of which `--x(-x)` would
be treated as one baseline token and is therefore not correctly recognized as 2. For
now a space has to be inserted)
During the implementation of the module, 2 question arose:
Should flag/parameter names be allowed to be type names?
Example case:
```shell
def f [ string ] { echo $string }
```
Currently an error is thrown
* Fix clippy lints
* Remove wrong comment
* Add spacing
* Add Cargo.lock
31 lines
886 B
TOML
31 lines
886 B
TOML
[package]
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authors = ["The Nu Project Contributors"]
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description = "Nushell parser"
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edition = "2018"
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license = "MIT"
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name = "nu-parser"
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version = "0.25.1"
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# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
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[dependencies]
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bigdecimal = {version = "0.2.0", features = ["serde"]}
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codespan-reporting = "0.11.0"
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derive-new = "0.5.8"
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indexmap = {version = "1.6.1", features = ["serde-1"]}
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log = "0.4.11"
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num-bigint = {version = "0.3.1", features = ["serde"]}
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num-traits = "0.2.14"
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serde = "1.0.118"
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shellexpand = "2.1.0"
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derive_is_enum_variant = "0.1.1"
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nu-errors = {version = "0.25.1", path = "../nu-errors"}
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nu-protocol = {version = "0.25.1", path = "../nu-protocol"}
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nu-source = {version = "0.25.1", path = "../nu-source"}
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nu-test-support = {version = "0.25.1", path = "../nu-test-support"}
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dunce = "1.0.1"
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[features]
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stable = []
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trace = []
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