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Fixing #18659

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Changes the radix multiplier to start at -0.0 instead of -1.0
when reading strings that start with '-'.
This commit is contained in:
juxiliary 2014-11-06 20:25:13 +10:00
parent 8ed288edb2
commit 18c328da27
1 changed files with 17 additions and 1 deletions
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18
src/libstd/num/strconv.rs
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@ -451,7 +451,7 @@ pub fn from_str_radix_float<T: Float>(src: &str, radix: uint) -> Option<T> {
};
// The significand to accumulate
let mut sig = if is_positive { _0 } else { -_1 };
let mut sig = if is_positive { _0 } else { -_0 };
// Necessary to detect overflow
let mut prev_sig = sig;
let mut cs = src.chars().enumerate();
@ -647,6 +647,22 @@ mod test {
let fe : Option<f32> = from_str_radix_float("1e40", 10);
assert_eq!(fe, Some(Float::infinity()))
}
#[test]
fn test_from_str_radix_float() {
let x1 : Option<f64> = from_str_radix_float("-123.456", 10);
assert_eq!(x1, Some(-123.456));
let x2 : Option<f32> = from_str_radix_float("123.456", 10);
assert_eq!(x2, Some(123.456));
let x3 : Option<f32> = from_str_radix_float("-0.0", 10);
assert_eq!(x3, Some(-0.0));
let x4 : Option<f32> = from_str_radix_float("0.0", 10);
assert_eq!(x4, Some(0.0));
let x4 : Option<f32> = from_str_radix_float("1.0", 10);
assert_eq!(x4, Some(1.0));
let x5 : Option<f32> = from_str_radix_float("-1.0", 10);
assert_eq!(x5, Some(-1.0));
}
}
#[cfg(test)]