Regular-Expresso Changeset

Changeset - f0b3b1bd87f4

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Laman - 10 months ago 2024-06-29 17:06:32

a basic command line interface

2 files changed with 50 insertions and 2 deletions:

regexp.py

src/main.rs

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regexp.py

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 import math
 import itertools
 import argparse
 from abc import abstractmethod
 from collections import deque
@@ @@ -380,7 +381,7 @@ class RegexpDFA: @@
 		return (rules, end_states)
-if __name__ == "__main__":
+def test():
 	tests = ["", "a", "ab", "aabb", "abab", "abcd", "abcbcdbcd"]
 	for pattern in ["a(b|c)", "a*b*", "(ab)*", "a((bc)*d)*", "(a|b)*a(a|b)(a|b)(a|b)", "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz"]:
 		print("#", pattern)
@@ @@ -393,3 +394,30 @@ if __name__ == "__main__": @@
 		for t in tests:
 			print(t, r.match(t))
 		print()
 if __name__ == "__main__":
 	parser = argparse.ArgumentParser()
 	subparsers = parser.add_subparsers()
 	test_parser = subparsers.add_parser("test")
 	test_parser.set_defaults(name="test")
 	match_parser = subparsers.add_parser("match")
 	match_parser.add_argument("pattern")
 	match_parser.add_argument("string")
 	match_parser.set_defaults(name="match")
 	args = parser.parse_args()
 	if args.name == "test":
 		test()
 	elif args.name == "match":
 		try:
 			r = RegexpDFA.create(args.pattern).reduce().normalize()
 		except ParsingError as e:
 			print("Failed to parse the regexp:")
 			print(e)
 		print(r.match(args.string))
 	else:
 		parser.print_help()
@@ \ No newline at end of file @@

src/main.rs

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 use std::env;
 use regexp::Regexp;
-fn main() {
+fn test() {
 	let tests = ["", "a", "ab", "aabb", "abab", "abcd", "abcbcdbcd"];
 	for pattern in ["a(b|c)", "a*b*", "(ab)*", "a((bc)*d)*", "(a|b)*a(a|b)(a|b)(a|b)", "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz"] {
 		println!("# {pattern}");
@@ @@ -17,3 +18,22 @@ fn main() { @@
 		println!();
+	}
+}
 fn main() {
 	let args: Vec<String> = env::args().collect();
 	match args[1].as_str() {
 		"test" => test(),
 		"match" => {
 			let r = match Regexp::new(&args[2].to_string()) {
 				Ok(r1) => r1.determinize().reduce().normalize(),
 				Err(e) => {
 					panic!("ERROR: {e}");
+				}
 			};
 			println!("{}", r.eval(args[3].to_string()));
+		}
 		s => {
 			println!("An unknown command: \"{s}\". Use \"match\" or \"test\".")
+		}
+	}
+}

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