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Cache Regex's

This commit is contained in:
Mark Rousskov 2019-06-21 12:04:27 -04:00
parent 2b6371dbfb
commit 5f1da8e533
3 changed files with 16 additions and 3 deletions
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1
Cargo.lock
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@ -3801,6 +3801,7 @@ dependencies = [
name = "tidy"
version = "0.1.0"
dependencies = [
"lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
"regex 1.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
"serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
"serde_json 1.0.33 (registry+https://github.com/rust-lang/crates.io-index)",

1
src/tools/tidy/Cargo.toml
View File

@ -8,3 +8,4 @@ edition = "2018"
regex = "1"
serde = { version = "1.0.8", features = ["derive"] }
serde_json = "1.0.2"
lazy_static = "1"

17
src/tools/tidy/src/features.rs
View File

@ -15,7 +15,7 @@ use std::fs::{self, File};
use std::io::prelude::*;
use std::path::Path;
use regex::{Regex, escape};
use regex::Regex;
mod version;
use version::Version;
@ -159,8 +159,19 @@ fn format_features<'a>(features: &'a Features, family: &'a str) -> impl Iterator
}
fn find_attr_val<'a>(line: &'a str, attr: &str) -> Option<&'a str> {
let r = Regex::new(&format!(r#"{}\s*=\s*"([^"]*)""#, escape(attr)))
.expect("malformed regex for find_attr_val");
lazy_static::lazy_static! {
static ref ISSUE: Regex = Regex::new(r#"issue\s*=\s*"([^"]*)""#).unwrap();
static ref FEATURE: Regex = Regex::new(r#"feature\s*=\s*"([^"]*)""#).unwrap();
static ref SINCE: Regex = Regex::new(r#"since\s*=\s*"([^"]*)""#).unwrap();
}
let r = match attr {
"issue" => &*ISSUE,
"feature" => &*FEATURE,
"since" => &*SINCE,
_ => unimplemented!("{} not handled", attr),
};
r.captures(line)
.and_then(|c| c.get(1))
.map(|m| m.as_str())