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Shave off one more string append in a rare case.

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This commit is contained in:
Graydon Hoare 2012-06-04 18:44:41 -07:00
parent a542258277
commit 5f904d278f
1 changed files with 6 additions and 5 deletions
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11
src/libcore/int-template.rs
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@ -89,11 +89,12 @@ fn parse_buf(buf: [u8], radix: uint) -> option<T> {
fn from_str(s: str) -> option<T> { parse_buf(str::bytes(s), 10u) } fn from_str(s: str) -> option<T> { parse_buf(str::bytes(s), 10u) }
#[doc = "Convert to a string in a given base"] #[doc = "Convert to a string in a given base"]
fn to_str(n: T, radix: uint) -> str { fn to_str(n: T, radix: uint) -> str unsafe {
assert (0u < radix && radix <= 16u); to_str_bytes(n, radix) {|slice|
ret if n < 0 as T { vec::unpack_slice(slice) {|p, len|
"-" + uint::to_str(-n as uint, radix) str::unsafe::from_buf_len(p, len)
} else { uint::to_str(n as uint, radix) }; }
}
} }
fn to_str_bytes<U>(n: T, radix: uint, f: fn([u8]/&) -> U) -> U { fn to_str_bytes<U>(n: T, radix: uint, f: fn([u8]/&) -> U) -> U {