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add file_prefix method to std::path #85166

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Merged
merged 7 commits into from
Aug 22, 2021
Merged

add file_prefix method to std::path #85166

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3e2206a
add file_prefix method
mbhall88 May 11, 2021
b1d84f7
add missing windows tests
mbhall88 May 11, 2021
7465192
simplify logic for split_file_at_dot
mbhall88 Jun 15, 2021
a889529
add explicit hidden file name tests
mbhall88 Jun 15, 2021
fcb1ebf
change return signature for split_file_at_dot
mbhall88 Jun 24, 2021
1e759be
make docs clearer about how hidden files are dealt with
mbhall88 Jun 24, 2021
51cf318
remove unnecessary empty check
mbhall88 Aug 17, 2021
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remove unnecessary empty check
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@mbhall88
mbhall88 committed Aug 17, 2021
commit 51cf318dbcdd38d6a7478413513a72097d9622c3
4 changes: 1 addition & 3 deletions library/std/src/path.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -2217,9 +2217,7 @@ impl Path {
///
#[unstable(feature = "path_file_prefix", issue = "86319")]
pub fn file_prefix(&self) -> Option<&OsStr> {
self.file_name()
.map(split_file_at_dot)
.and_then(|(before, after)| if before.is_empty() { after } else { Some(before) })
self.file_name().map(split_file_at_dot).and_then(|(before, _after)| Some(before))
}

/// Extracts the extension of [`self.file_name`], if possible.
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4 changes: 4 additions & 0 deletions library/std/src/path/tests.rs
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Expand Up @@ -1127,6 +1127,8 @@ pub fn test_stem_ext() {

t!(".x.y.z", file_stem: Some(".x.y"), extension: Some("z"));

t!("..x.y.z", file_stem: Some("..x.y"), extension: Some("z"));

t!("", file_stem: None, extension: None);
}

Expand Down Expand Up @@ -1168,6 +1170,8 @@ pub fn test_prefix_ext() {

t!(".x.y.z", file_prefix: Some(".x"), extension: Some("z"));

t!("..x.y.z", file_prefix: Some("."), extension: Some("z"));

t!("", file_prefix: None, extension: None);
}

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