nushell/crates/nu-cli/src/print.rs

58 lines
1.4 KiB
Rust

use nu_engine::CallExt;
use nu_protocol::ast::Call;
use nu_protocol::engine::{Command, EngineState, Stack};
use nu_protocol::{
Category, Example, IntoPipelineData, PipelineData, ShellError, Signature, SyntaxShape, Value,
};
#[derive(Clone)]
pub struct Print;
impl Command for Print {
fn name(&self) -> &str {
"print"
}
fn signature(&self) -> Signature {
Signature::build("print")
.rest("rest", SyntaxShape::Any, "the values to print")
.category(Category::Strings)
}
fn usage(&self) -> &str {
"Prints the values given"
}
fn run(
&self,
engine_state: &EngineState,
stack: &mut Stack,
call: &Call,
_input: PipelineData,
) -> Result<PipelineData, ShellError> {
let args: Vec<Value> = call.rest(engine_state, stack, 0)?;
let head = call.head;
for arg in args {
crate::util::print_pipeline_data(arg.into_pipeline_data(), engine_state, stack)?;
}
Ok(PipelineData::new(head))
}
fn examples(&self) -> Vec<Example> {
vec![
Example {
description: "Print 'hello world'",
example: r#"print "hello world""#,
result: None,
},
Example {
description: "Print the sum of 2 and 3",
example: r#"print (2 + 3)"#,
result: None,
},
]
}
}