Merge pull request #39 from blaenk/from_str

provides a simple implementation of FromStr for Pattern

Author: alexcrichton

src/lib.rs

@@ -33,6 +33,7 @@ use std::fs;
 use std::io::prelude::*;
 use std::io;
 use std::path::{self, Path, PathBuf, Component};
+use std::str::FromStr;
 
 use PatternToken::{Char, AnyChar, AnySequence, AnyRecursiveSequence, AnyWithin};
 use PatternToken::AnyExcept;
@@ -399,6 +400,14 @@ impl fmt::Display for Pattern {
     }
 }
 
+impl FromStr for Pattern {
+    type Err = PatternError;
+
+    fn from_str(s: &str) -> Result<Pattern, PatternError> {
+        Pattern::new(s)
+    }
+}
+
 #[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
 enum PatternToken {
     Char(char),
@@ -913,6 +922,12 @@ mod test {
     use std::path::Path;
     use super::{glob, Pattern, MatchOptions};
 
+    #[test]
+    fn test_pattern_from_str() {
+        assert!("a*b".parse::<Pattern>().unwrap().matches("a_b"));
+        assert!("a/**b".parse::<Pattern>().unwrap_err().pos == 4);
+    }
+
     #[test]
     fn test_wildcard_errors() {
         assert!(Pattern::new("a/**b").unwrap_err().pos == 4);