Add argparse 0.2.2 as a dependency

This patch adds the crate rust-argparse [0] in version 0.2.2 as a
dependency, as discussed in issue #4.

[0]  https://github.com/tailhook/rust-argparse

Import subrepo argparse/:argparse at 0de60a5e6d9ee1a3570d6089afd3ccd6ed7480c5

1 files changed, 51 insertions, 0 deletions

diff --git a/argparse/src/test_enum.rs b/argparse/src/test_enum.rs
new file mode 100644
index 0000000..5205738
--- /dev/null
+++ b/argparse/src/test_enum.rs
@@ -0,0 +1,51 @@
+use std::str::FromStr;
+
+use parser::ArgumentParser;
+use super::Store;
+use test_parser::{check_ok};
+
+use self::Greeting::{Hello, Hi, NoGreeting};
+
+
+#[derive(PartialEq, Eq, Debug)]
+enum Greeting {
+    Hello,
+    Hi,
+    NoGreeting,
+}
+
+impl FromStr for Greeting {
+    type Err = ();
+    fn from_str(src: &str) -> Result<Greeting, ()> {
+        return match src {
+            "hello" => Ok(Hello),
+            "hi" => Ok(Hi),
+            _ => Err(()),
+        };
+    }
+}
+
+fn parse_enum(args: &[&str]) -> Greeting {
+    let mut val = NoGreeting;
+    {
+        let mut ap = ArgumentParser::new();
+        ap.refer(&mut val)
+          .add_option(&["-g"], Store,
+            "Greeting");
+        check_ok(&ap, args);
+    }
+    return val;
+}
+
+#[test]
+fn test_parse_enum() {
+    assert_eq!(parse_enum(&["./argparse_test"]), NoGreeting);
+    assert_eq!(parse_enum(&["./argparse_test", "-ghello"]), Hello);
+    assert_eq!(parse_enum(&["./argparse_test", "-ghi"]), Hi);
+}
+
+#[test]
+#[should_panic]
+fn test_parse_error() {
+    parse_enum(&["./argparse_test", "-ghell"]);
+}