holm/nushell
1
1
Fork 0
forked from extern/nushell
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Declare input and output types of commands (#6796)

Browse Source 
* Add failing test that list of ints and floats is List<Number>

* Start defining subtype relation

* Make it possible to declare input and output types for commands

- Enforce them in tests

* Declare input and output types of commands

* Add formatted signatures to `help commands` table

* Revert SyntaxShape::Table -> Type::Table change

* Revert unnecessary derive(Hash) on SyntaxShape

Co-authored-by: JT <547158+jntrnr@users.noreply.github.com>
This commit is contained in:
Dan Davison
2022-11-09 16:55:05 -05:00
committed by GitHub
parent f878276de7
commit df94052180
238 changed files with 2315 additions and 756 deletions
Download Patch File Download Diff File Expand all files Collapse all files

30
crates/nu-command/src/math/min.rs
View File

@ -2,7 +2,7 @@ use crate::math::reducers::{reducer_for, Reduce};
use crate::math::utils::run_with_function;
use nu_protocol::ast::Call;
use nu_protocol::engine::{Command, EngineState, Stack};
use nu_protocol::{Category, Example, PipelineData, ShellError, Signature, Span, Value};
use nu_protocol::{Category, Example, PipelineData, ShellError, Signature, Span, Type, Value};
#[derive(Clone)]
pub struct SubCommand;
@ -13,7 +13,12 @@ impl Command for SubCommand {
}
fn signature(&self) -> Signature {
Signature::build("math min").category(Category::Math)
Signature::build("math min")
.input_output_types(vec![
(Type::List(Box::new(Type::Number)), Type::Number),
(Type::Table(vec![]), Type::Record(vec![])),
])
.category(Category::Math)
}
fn usage(&self) -> &str {
@ -35,11 +40,22 @@ impl Command for SubCommand {
}
fn examples(&self) -> Vec<Example> {
vec![Example {
description: "Get the minimum of a list of numbers",
example: "[-50 100 25] | math min",
result: Some(Value::test_int(-50)),
}]
vec![
Example {
description: "Compute the minimum of a list of numbers",
example: "[-50 100 25] | math min",
result: Some(Value::test_int(-50)),
},
Example {
description: "Compute the minima of the columns of a table",
example: "[{a: 1 b: 3} {a: 2 b: -1}] | math min",
result: Some(Value::Record {
cols: vec!["a".to_string(), "b".to_string()],
vals: vec![Value::test_int(1), Value::test_int(-1)],
span: Span::test_data(),
}),
},
]
}
}