nushell/crates/nu-cli/src/validation.rs
Reilly Wood 5664ee7bda
Remove engine_state clones in REPL eval (#7713)
A small but easy optimization for `evaluate_repl()`: clone
`engine_state` 1x instead of 3x.

This reduces time spent in a simple REPL eval (`enter` key pressed with
no command text) by about 10%, as measured in
[Superluminal](https://superluminal.eu/).
2023-01-10 17:22:32 -08:00

21 lines
652 B
Rust

use nu_parser::{parse, ParseError};
use nu_protocol::engine::{EngineState, StateWorkingSet};
use reedline::{ValidationResult, Validator};
use std::sync::Arc;
pub struct NuValidator {
pub engine_state: Arc<EngineState>,
}
impl Validator for NuValidator {
fn validate(&self, line: &str) -> ValidationResult {
let mut working_set = StateWorkingSet::new(&self.engine_state);
let (_, err) = parse(&mut working_set, None, line.as_bytes(), false, &[]);
if matches!(err, Some(ParseError::UnexpectedEof(..))) {
ValidationResult::Incomplete
} else {
ValidationResult::Complete
}
}
}