30a6fcccee
Right now this introduces a simple mechanism to flip between the interpreters. Change-Id: I92ee920c53d76ab6b664ac671993a6d6426af61a Reviewed-on: https://cl.tvl.fyi/c/depot/+/2412 Reviewed-by: tazjin <mail@tazj.in> Tested-by: BuildkiteCI
25 lines
644 B
Rust
25 lines
644 B
Rust
use std::fmt;
|
|
use std::time::{SystemTime, UNIX_EPOCH};
|
|
|
|
use crate::errors::Error;
|
|
use crate::parser::Literal;
|
|
use crate::treewalk::interpreter::Value;
|
|
|
|
pub trait Builtin: fmt::Debug {
|
|
fn arity(&self) -> usize;
|
|
fn call(&self, args: Vec<Value>) -> Result<Value, Error>;
|
|
}
|
|
|
|
// Builtin to return the current timestamp.
|
|
#[derive(Debug)]
|
|
pub struct Clock {}
|
|
impl Builtin for Clock {
|
|
fn arity(&self) -> usize {
|
|
0
|
|
}
|
|
|
|
fn call(&self, _args: Vec<Value>) -> Result<Value, Error> {
|
|
let now = SystemTime::now().duration_since(UNIX_EPOCH).unwrap();
|
|
Ok(Value::Literal(Literal::Number(now.as_secs() as f64)))
|
|
}
|
|
}
|