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collections: impl Deref for Vec/String #18443

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Merged
merged 1 commit into from
Oct 31, 2014
Merged

collections: impl Deref for Vec/String #18443

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69 changes: 0 additions & 69 deletions src/libcollections/str.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1677,40 +1677,6 @@ mod tests {
assert_eq!(pos, p.len());
}

#[test]
fn test_split_char_iterator() {
let data = "\nMäry häd ä little lämb\nLittle lämb\n";

let split: Vec<&str> = data.split(' ').collect();
assert_eq!( split, vec!["\nMäry", "häd", "ä", "little", "lämb\nLittle", "lämb\n"]);

let mut rsplit: Vec<&str> = data.split(' ').rev().collect();
rsplit.reverse();
assert_eq!(rsplit, vec!["\nMäry", "häd", "ä", "little", "lämb\nLittle", "lämb\n"]);

let split: Vec<&str> = data.split(|c: char| c == ' ').collect();
assert_eq!( split, vec!["\nMäry", "häd", "ä", "little", "lämb\nLittle", "lämb\n"]);

let mut rsplit: Vec<&str> = data.split(|c: char| c == ' ').rev().collect();
rsplit.reverse();
assert_eq!(rsplit, vec!["\nMäry", "häd", "ä", "little", "lämb\nLittle", "lämb\n"]);

// Unicode
let split: Vec<&str> = data.split('ä').collect();
assert_eq!( split, vec!["\nM", "ry h", "d ", " little l", "mb\nLittle l", "mb\n"]);

let mut rsplit: Vec<&str> = data.split('ä').rev().collect();
rsplit.reverse();
assert_eq!(rsplit, vec!["\nM", "ry h", "d ", " little l", "mb\nLittle l", "mb\n"]);

let split: Vec<&str> = data.split(|c: char| c == 'ä').collect();
assert_eq!( split, vec!["\nM", "ry h", "d ", " little l", "mb\nLittle l", "mb\n"]);

let mut rsplit: Vec<&str> = data.split(|c: char| c == 'ä').rev().collect();
rsplit.reverse();
assert_eq!(rsplit, vec!["\nM", "ry h", "d ", " little l", "mb\nLittle l", "mb\n"]);
}

#[test]
fn test_splitn_char_iterator() {
let data = "\nMäry häd ä little lämb\nLittle lämb\n";
Expand All @@ -1729,28 +1695,6 @@ mod tests {
assert_eq!(split, vec!["\nM", "ry h", "d ", " little lämb\nLittle lämb\n"]);
}

#[test]
fn test_rsplitn_char_iterator() {
let data = "\nMäry häd ä little lämb\nLittle lämb\n";

let mut split: Vec<&str> = data.rsplitn(3, ' ').collect();
split.reverse();
assert_eq!(split, vec!["\nMäry häd ä", "little", "lämb\nLittle", "lämb\n"]);

let mut split: Vec<&str> = data.rsplitn(3, |c: char| c == ' ').collect();
split.reverse();
assert_eq!(split, vec!["\nMäry häd ä", "little", "lämb\nLittle", "lämb\n"]);

// Unicode
let mut split: Vec<&str> = data.rsplitn(3, 'ä').collect();
split.reverse();
assert_eq!(split, vec!["\nMäry häd ", " little l", "mb\nLittle l", "mb\n"]);

let mut split: Vec<&str> = data.rsplitn(3, |c: char| c == 'ä').collect();
split.reverse();
assert_eq!(split, vec!["\nMäry häd ", " little l", "mb\nLittle l", "mb\n"]);
}

#[test]
fn test_split_char_iterator_no_trailing() {
let data = "\nMäry häd ä little lämb\nLittle lämb\n";
Expand All @@ -1762,19 +1706,6 @@ mod tests {
assert_eq!(split, vec!["", "Märy häd ä little lämb", "Little lämb"]);
}

#[test]
fn test_rev_split_char_iterator_no_trailing() {
let data = "\nMäry häd ä little lämb\nLittle lämb\n";

let mut split: Vec<&str> = data.split('\n').rev().collect();
split.reverse();
assert_eq!(split, vec!["", "Märy häd ä little lämb", "Little lämb", ""]);

let mut split: Vec<&str> = data.split_terminator('\n').rev().collect();
split.reverse();
assert_eq!(split, vec!["", "Märy häd ä little lämb", "Little lämb"]);
}

#[test]
fn test_words() {
let data = "\n \tMäry häd\tä little lämb\nLittle lämb\n";
Expand Down
5 changes: 5 additions & 0 deletions src/libcollections/string.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -744,6 +744,11 @@ impl ops::Slice<uint, str> for String {
}
}

#[experimental = "waiting on Deref stabilization"]
impl ops::Deref<str> for String {
fn deref<'a>(&'a self) -> &'a str { self.as_slice() }
}

/// Wrapper type providing a `&String` reference via `Deref`.
#[experimental]
pub struct DerefString<'a> {
Expand Down
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