forked from extern/nushell
86 lines
2.2 KiB
Rust
86 lines
2.2 KiB
Rust
|
use crate::commands::math::utils::run_with_numerical_functions_on_stream;
|
||
|
use crate::commands::WholeStreamCommand;
|
||
|
use crate::prelude::*;
|
||
|
use nu_errors::ShellError;
|
||
|
use nu_protocol::{Signature, UntaggedValue, Value};
|
||
|
|
||
|
pub struct SubCommand;
|
||
|
|
||
|
#[async_trait]
|
||
|
impl WholeStreamCommand for SubCommand {
|
||
|
fn name(&self) -> &str {
|
||
|
"math round"
|
||
|
}
|
||
|
|
||
|
fn signature(&self) -> Signature {
|
||
|
Signature::build("math round")
|
||
|
}
|
||
|
|
||
|
fn usage(&self) -> &str {
|
||
|
"Applies the round function to a list of numbers"
|
||
|
}
|
||
|
|
||
|
async fn run(
|
||
|
&self,
|
||
|
args: CommandArgs,
|
||
|
registry: &CommandRegistry,
|
||
|
) -> Result<OutputStream, ShellError> {
|
||
|
run_with_numerical_functions_on_stream(
|
||
|
RunnableContext {
|
||
|
input: args.input,
|
||
|
registry: registry.clone(),
|
||
|
shell_manager: args.shell_manager,
|
||
|
host: args.host,
|
||
|
ctrl_c: args.ctrl_c,
|
||
|
current_errors: args.current_errors,
|
||
|
name: args.call_info.name_tag,
|
||
|
raw_input: args.raw_input,
|
||
|
},
|
||
|
round_big_int,
|
||
|
round_big_decimal,
|
||
|
round_default,
|
||
|
)
|
||
|
.await
|
||
|
}
|
||
|
|
||
|
fn examples(&self) -> Vec<Example> {
|
||
|
vec![Example {
|
||
|
description: "Apply the round function to a list of numbers",
|
||
|
example: "echo [1.5 2.3 -3.1] | math round",
|
||
|
result: Some(vec![
|
||
|
UntaggedValue::int(2).into(),
|
||
|
UntaggedValue::int(2).into(),
|
||
|
UntaggedValue::int(-3).into(),
|
||
|
]),
|
||
|
}]
|
||
|
}
|
||
|
}
|
||
|
|
||
|
fn round_big_int(val: BigInt) -> Value {
|
||
|
UntaggedValue::int(val).into()
|
||
|
}
|
||
|
|
||
|
fn round_big_decimal(val: BigDecimal) -> Value {
|
||
|
let (rounded, _) = val.round(0).as_bigint_and_exponent();
|
||
|
UntaggedValue::int(rounded).into()
|
||
|
}
|
||
|
|
||
|
fn round_default(_: UntaggedValue) -> Value {
|
||
|
UntaggedValue::Error(ShellError::unexpected(
|
||
|
"Only numerical values are supported",
|
||
|
))
|
||
|
.into()
|
||
|
}
|
||
|
#[cfg(test)]
|
||
|
mod tests {
|
||
|
use super::ShellError;
|
||
|
use super::SubCommand;
|
||
|
|
||
|
#[test]
|
||
|
fn examples_work_as_expected() -> Result<(), ShellError> {
|
||
|
use crate::examples::test as test_examples;
|
||
|
|
||
|
Ok(test_examples(SubCommand {})?)
|
||
|
}
|
||
|
}
|