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std: methodise str::capacity

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This commit is contained in:
Huon Wilson 2013-06-11 21:43:29 +10:00
parent 3ac00a9489
commit 12750c8893
1 changed files with 12 additions and 12 deletions
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24
src/libstd/str.rs
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@ -1094,18 +1094,6 @@ pub fn subslice_offset(outer: &str, inner: &str) -> uint {
}
}
/**
* Returns the number of single-byte characters the string can hold without
* reallocating
*/
pub fn capacity(s: &const ~str) -> uint {
let buf: &const ~[u8] = unsafe { cast::transmute(s) };
let vcap = vec::capacity(buf);
assert!(vcap > 0u);
vcap - 1u
}
/// Escape each char in `s` with char::escape_default.
pub fn escape_default(s: &str) -> ~str {
let mut out: ~str = ~"";
@ -2020,6 +2008,7 @@ pub trait OwnedStr {
fn append(&self, rhs: &str) -> ~str; // FIXME #4850: this should consume self.
fn reserve(&mut self, n: uint);
fn reserve_at_least(&mut self, n: uint);
fn capacity(&self) -> uint;
fn as_bytes_with_null_consume(self) -> ~[u8];
}
@ -2212,6 +2201,17 @@ impl OwnedStr for ~str {
self.reserve(uint::next_power_of_two(n + 1u) - 1u)
}
/**
* Returns the number of single-byte characters the string can hold without
* reallocating
*/
fn capacity(&self) -> uint {
let buf: &const ~[u8] = unsafe { cast::transmute(self) };
let vcap = vec::capacity(buf);
assert!(vcap > 0u);
vcap - 1u
}
/// Convert to a vector of bytes. This does not allocate a new
/// string, and includes the null terminator.
#[inline]