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Diffstat (limited to 'vendor/regex/examples/shootout-regex-dna.rs')
-rw-r--r-- | vendor/regex/examples/shootout-regex-dna.rs | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/vendor/regex/examples/shootout-regex-dna.rs b/vendor/regex/examples/shootout-regex-dna.rs new file mode 100644 index 000000000..b96518e4c --- /dev/null +++ b/vendor/regex/examples/shootout-regex-dna.rs @@ -0,0 +1,68 @@ +// The Computer Language Benchmarks Game +// https://benchmarksgame-team.pages.debian.net/benchmarksgame/ +// +// contributed by the Rust Project Developers +// contributed by TeXitoi +// contributed by BurntSushi + +use std::io::{self, Read}; +use std::sync::Arc; +use std::thread; + +macro_rules! regex { + ($re:expr) => { + ::regex::Regex::new($re).unwrap() + }; +} + +fn main() { + let mut seq = String::with_capacity(51 * (1 << 20)); + io::stdin().read_to_string(&mut seq).unwrap(); + let ilen = seq.len(); + + seq = regex!(">[^\n]*\n|\n").replace_all(&seq, "").into_owned(); + let clen = seq.len(); + let seq_arc = Arc::new(seq.clone()); + + let variants = vec![ + regex!("agggtaaa|tttaccct"), + regex!("[cgt]gggtaaa|tttaccc[acg]"), + regex!("a[act]ggtaaa|tttacc[agt]t"), + regex!("ag[act]gtaaa|tttac[agt]ct"), + regex!("agg[act]taaa|ttta[agt]cct"), + regex!("aggg[acg]aaa|ttt[cgt]ccct"), + regex!("agggt[cgt]aa|tt[acg]accct"), + regex!("agggta[cgt]a|t[acg]taccct"), + regex!("agggtaa[cgt]|[acg]ttaccct"), + ]; + let mut counts = vec![]; + for variant in variants { + let seq = seq_arc.clone(); + let restr = variant.to_string(); + let future = thread::spawn(move || variant.find_iter(&seq).count()); + counts.push((restr, future)); + } + + let substs = vec![ + (regex!("B"), "(c|g|t)"), + (regex!("D"), "(a|g|t)"), + (regex!("H"), "(a|c|t)"), + (regex!("K"), "(g|t)"), + (regex!("M"), "(a|c)"), + (regex!("N"), "(a|c|g|t)"), + (regex!("R"), "(a|g)"), + (regex!("S"), "(c|g)"), + (regex!("V"), "(a|c|g)"), + (regex!("W"), "(a|t)"), + (regex!("Y"), "(c|t)"), + ]; + let mut seq = seq; + for (re, replacement) in substs { + seq = re.replace_all(&seq, replacement).into_owned(); + } + + for (variant, count) in counts { + println!("{} {}", variant, count.join().unwrap()); + } + println!("\n{}\n{}\n{}", ilen, clen, seq.len()); +} |