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@ -242,40 +242,6 @@ impl f32 {
@@ -242,40 +242,6 @@ impl f32 {
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#[inline] |
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pub fn classify(self) -> FpCategory { num::Float::classify(self) } |
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/// Returns the mantissa, base 2 exponent, and sign as integers, respectively.
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/// The original number can be recovered by `sign * mantissa * 2 ^ exponent`.
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/// The floating point encoding is documented in the [Reference][floating-point].
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///
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/// ```
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/// #![feature(float_extras)]
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///
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/// use std::f32;
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///
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/// let num = 2.0f32;
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///
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/// // (8388608, -22, 1)
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/// let (mantissa, exponent, sign) = num.integer_decode();
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/// let sign_f = sign as f32;
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/// let mantissa_f = mantissa as f32;
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/// let exponent_f = num.powf(exponent as f32);
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///
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/// // 1 * 8388608 * 2^(-22) == 2
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/// let abs_difference = (sign_f * mantissa_f * exponent_f - num).abs();
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///
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/// assert!(abs_difference <= f32::EPSILON);
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/// ```
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/// [floating-point]: ../reference.html#machine-types
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#[unstable(feature = "float_extras", reason = "signature is undecided",
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issue = "27752")] |
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#[rustc_deprecated(since = "1.11.0",
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reason = "never really came to fruition and easily \ |
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implementable outside the standard library")] |
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#[inline] |
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#[allow(deprecated)] |
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pub fn integer_decode(self) -> (u64, i16, i8) { |
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num::Float::integer_decode(self) |
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} |
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/// Returns the largest integer less than or equal to a number.
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///
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/// ```
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