comparison rust/hg-core/src/matchers.rs @ 44784:83c97c0bd319

rust-matchers: add timing tracing to regex compilation

This might be useful to diagnose later performance issues or just to show
the difference between engines.

Differential Revision: https://phab.mercurial-scm.org/D8498

44778:cfe86fbc722e

use std::collections::HashSet;
use std::fmt::{Display, Error, Formatter};
use std::iter::FromIterator;
use std::ops::Deref;
use std::path::{Path, PathBuf};

#[derive(Debug, PartialEq)]
pub enum VisitChildrenSet<'a> {
    /// Don't visit anything
    Empty,

/// Returns a function that matches an `HgPath` against the given regex
/// pattern.
///
/// This can fail when the pattern is invalid or not supported by the
/// underlying engine `Re2`, for instance anything with back-references.
fn re_matcher(
    pattern: &[u8],
) -> PatternResult<impl Fn(&HgPath) -> bool + Sync> {
    let regex = Re2::new(pattern);
    let regex = regex.map_err(|e| PatternError::UnsupportedSyntax(e))?;

/// pattern.
///
/// This can fail when the pattern is invalid or not supported by the
/// underlying engine (the `regex` crate), for instance anything with
/// back-references.
fn re_matcher(
    pattern: &[u8],
) -> PatternResult<impl Fn(&HgPath) -> bool + Sync> {
    use std::io::Write;

44784:83c97c0bd319

use std::collections::HashSet;
use std::fmt::{Display, Error, Formatter};
use std::iter::FromIterator;
use std::ops::Deref;
use std::path::{Path, PathBuf};

use micro_timer::timed;

#[derive(Debug, PartialEq)]
pub enum VisitChildrenSet<'a> {
    /// Don't visit anything
    Empty,

/// Returns a function that matches an `HgPath` against the given regex
/// pattern.
///
/// This can fail when the pattern is invalid or not supported by the
/// underlying engine `Re2`, for instance anything with back-references.
#[timed]
fn re_matcher(
    pattern: &[u8],
) -> PatternResult<impl Fn(&HgPath) -> bool + Sync> {
    let regex = Re2::new(pattern);
    let regex = regex.map_err(|e| PatternError::UnsupportedSyntax(e))?;

/// pattern.
///
/// This can fail when the pattern is invalid or not supported by the
/// underlying engine (the `regex` crate), for instance anything with
/// back-references.
#[timed]
fn re_matcher(
    pattern: &[u8],
) -> PatternResult<impl Fn(&HgPath) -> bool + Sync> {
    use std::io::Write;