forked from extern/nushell
942c66a9f3
The following math commands are being moved to nu-cmd-extra * cos * cosh * egamma * phi * pi * sin * sinh * tan * tanh * tau For now I think we have most of the obvious commands moved over based on @sholderbach this should cover moving the "high school" commands.. >>Yeah I think this rough separation into "high school" math in extra and "middle school"/"programmer" math in the core makes a ton of sense. And to reference the @fdncred list from https://github.com/nushell/nushell/pull/9647#issuecomment-1629498812
65 lines
1.7 KiB
Rust
65 lines
1.7 KiB
Rust
use nu_protocol::ast::Call;
|
||
use nu_protocol::engine::{Command, EngineState, Stack};
|
||
use nu_protocol::{
|
||
Category, Example, IntoPipelineData, PipelineData, ShellError, Signature, Type, Value,
|
||
};
|
||
|
||
#[allow(clippy::excessive_precision)]
|
||
/// The Euler-Mascheroni constant (γ)
|
||
pub const EGAMMA: f64 = 0.577215664901532860606512090082402431_f64;
|
||
|
||
#[derive(Clone)]
|
||
pub struct SubCommand;
|
||
|
||
impl Command for SubCommand {
|
||
fn name(&self) -> &str {
|
||
"math egamma"
|
||
}
|
||
|
||
fn signature(&self) -> Signature {
|
||
Signature::build("math egamma")
|
||
.input_output_types(vec![(Type::Any, Type::Float)])
|
||
.category(Category::Math)
|
||
}
|
||
|
||
fn usage(&self) -> &str {
|
||
"Returns the Euler–Mascheroni constant γ. ( 1 | math egamma)."
|
||
}
|
||
|
||
fn search_terms(&self) -> Vec<&str> {
|
||
vec!["euler", "constant", "gamma"]
|
||
}
|
||
|
||
#[allow(clippy::approx_constant)]
|
||
fn examples(&self) -> Vec<Example> {
|
||
vec![Example {
|
||
example: "math egamma | math round --precision 3",
|
||
description: "Get the first three decimal digits of γ",
|
||
result: Some(Value::test_float(0.577)),
|
||
}]
|
||
}
|
||
|
||
fn run(
|
||
&self,
|
||
_engine_state: &EngineState,
|
||
_stack: &mut Stack,
|
||
call: &Call,
|
||
_input: PipelineData,
|
||
) -> Result<PipelineData, ShellError> {
|
||
// TODO: replace with std::f64::consts::EGAMMA when available https://github.com/rust-lang/rust/issues/103883
|
||
Ok(Value::float(EGAMMA, call.head).into_pipeline_data())
|
||
}
|
||
}
|
||
|
||
#[cfg(test)]
|
||
mod test {
|
||
use super::*;
|
||
|
||
#[test]
|
||
fn test_examples() {
|
||
use crate::test_examples;
|
||
|
||
test_examples(SubCommand {})
|
||
}
|
||
}
|