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add mutability annotations to libcore

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This commit is contained in:
Niko Matsakis
2012-03-06 20:48:40 -08:00
parent 674587cfe5
commit 713006c7b6
22 changed files with 204 additions and 198 deletions
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32
src/libcore/float.rs
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@@ -49,14 +49,14 @@ exact - Whether to enforce the exact number of significant digits
*/
fn to_str_common(num: float, digits: uint, exact: bool) -> str {
if is_NaN(num) { ret "NaN"; }
let (num, accum) = if num < 0.0 { (-num, "-") } else { (num, "") };
let mut (num, accum) = if num < 0.0 { (-num, "-") } else { (num, "") };
let trunc = num as uint;
let frac = num - (trunc as float);
let mut frac = num - (trunc as float);
accum += uint::str(trunc);
if (frac < epsilon && !exact) || digits == 0u { ret accum; }
accum += ".";
let i = digits;
let epsilon = 1. / pow_with_uint(10u, i);
let mut i = digits;
let mut epsilon = 1. / pow_with_uint(10u, i);
while i > 0u && (frac >= epsilon || exact) {
frac *= 10.0;
epsilon *= 10.0;
@@ -132,13 +132,13 @@ Otherwise, some(n) where n is the floating-point
number represented by [num].
*/
fn from_str(num: str) -> option<float> {
let pos = 0u; //Current byte position in the string.
//Used to walk the string in O(n).
let len = str::len(num); //Length of the string, in bytes.
let mut pos = 0u; //Current byte position in the string.
//Used to walk the string in O(n).
let len = str::len(num); //Length of the string, in bytes.
if len == 0u { ret none; }
let total = 0f; //Accumulated result
let c = 'z'; //Latest char.
let mut total = 0f; //Accumulated result
let mut c = 'z'; //Latest char.
//The string must start with one of the following characters.
alt str::char_at(num, 0u) {
@@ -147,7 +147,7 @@ fn from_str(num: str) -> option<float> {
}
//Determine if first char is '-'/'+'. Set [pos] and [neg] accordingly.
let neg = false; //Sign of the result
let mut neg = false; //Sign of the result
alt str::char_at(num, 0u) {
'-' {
neg = true;
@@ -179,7 +179,7 @@ fn from_str(num: str) -> option<float> {
}
if c == '.' {//Examine decimal part
let decimal = 1f;
let mut decimal = 1f;
while(pos < len) {
let char_range = str::char_range_at(num, pos);
c = char_range.ch;
@@ -200,8 +200,8 @@ fn from_str(num: str) -> option<float> {
}
if (c == 'e') | (c == 'E') {//Examine exponent
let exponent = 0u;
let neg_exponent = false;
let mut exponent = 0u;
let mut neg_exponent = false;
if(pos < len) {
let char_range = str::char_range_at(num, pos);
c = char_range.ch;
@@ -275,9 +275,9 @@ fn pow_with_uint(base: uint, pow: uint) -> float {
}
ret 0.;
}
let my_pow = pow;
let total = 1f;
let multiplier = base as float;
let mut my_pow = pow;
let mut total = 1f;
let mut multiplier = base as float;
while (my_pow > 0u) {
if my_pow % 2u == 1u {
total = total * multiplier;