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Implement Default trait for OsString/OsStr #32404

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merged 3 commits into from
Mar 23, 2016
Merged

Implement Default trait for OsString/OsStr #32404

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08eaf07
Implement Default for OsString
WiSaGaN Mar 21, 2016
aa5afb0
Implement Default for OsStr
WiSaGaN Mar 21, 2016
b5b1d06
Fix Default for OsString/OsStr
WiSaGaN Mar 21, 2016
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28 changes: 28 additions & 0 deletions src/libstd/ffi/os_str.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -173,6 +173,14 @@ impl ops::Deref for OsString {
}
}

#[stable(feature = "osstring_default", since = "1.9.0")]
impl Default for OsString {
#[inline]
fn default() -> OsString {
OsString::new()
}
}

#[stable(feature = "rust1", since = "1.0.0")]
impl Debug for OsString {
fn fmt(&self, formatter: &mut fmt::Formatter) -> Result<(), fmt::Error> {
Expand Down Expand Up @@ -302,6 +310,14 @@ impl OsStr {
}
}

#[stable(feature = "osstring_default", since = "1.9.0")]
impl<'a> Default for &'a OsStr {
#[inline]
fn default() -> &'a OsStr {
OsStr::new("")
}
}

#[stable(feature = "rust1", since = "1.0.0")]
impl PartialEq for OsStr {
fn eq(&self, other: &OsStr) -> bool {
Expand Down Expand Up @@ -554,6 +570,12 @@ mod tests {
assert!(os_string.capacity() >= 33)
}

#[test]
fn test_os_string_default() {
let os_string: OsString = Default::default();
assert_eq!("", &os_string);
}

#[test]
fn test_os_str_is_empty() {
let mut os_string = OsString::new();
Expand All @@ -577,4 +599,10 @@ mod tests {
os_string.clear();
assert_eq!(0, os_string.len());
}

#[test]
fn test_os_str_default() {
let os_str: &OsStr = Default::default();
assert_eq!("", os_str);
}
}