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
1.6 KiB
Rust
65 lines
1.6 KiB
Rust
use nu_protocol::ast::Call;
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use nu_protocol::engine::{Command, EngineState, Stack};
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use nu_protocol::{
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Category, Example, IntoPipelineData, PipelineData, ShellError, Signature, Type, Value,
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};
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#[allow(clippy::excessive_precision)]
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/// The golden ratio (φ)
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pub const PHI: f64 = 1.618033988749894848204586834365638118_f64;
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#[derive(Clone)]
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pub struct SubCommand;
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impl Command for SubCommand {
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fn name(&self) -> &str {
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"math phi"
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}
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fn signature(&self) -> Signature {
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Signature::build("math phi")
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.input_output_types(vec![(Type::Any, Type::Float)])
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.category(Category::Math)
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}
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fn usage(&self) -> &str {
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"Returns the golden ratio φ. ( (1 + sqrt(5) ) / 2 )"
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}
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fn search_terms(&self) -> Vec<&str> {
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vec!["golden", "ratio", "constant"]
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}
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#[allow(clippy::approx_constant)]
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fn examples(&self) -> Vec<Example> {
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vec![Example {
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example: "math phi | math round --precision 3",
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description: "Get the first two decimal digits of φ",
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result: Some(Value::test_float(1.618)),
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}]
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}
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fn run(
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&self,
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_engine_state: &EngineState,
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_stack: &mut Stack,
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call: &Call,
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_input: PipelineData,
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) -> Result<PipelineData, ShellError> {
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// TODO: replace with std::f64::consts::PHI when available https://github.com/rust-lang/rust/issues/103883
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Ok(Value::float(PHI, call.head).into_pipeline_data())
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}
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}
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#[cfg(test)]
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mod test {
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use super::*;
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#[test]
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fn test_examples() {
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use crate::test_examples;
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test_examples(SubCommand {})
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}
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}
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