use core::marker::PhantomData;
use core::mem;
#[cfg(not(test))]
+#[cfg(stage0)]
use core::num::Float;
use core::ops::Bound::{Excluded, Included, Unbounded};
use core::ops::{Index, IndexMut, RangeBounds};
#![feature(cfg_target_has_atomic)]
#![feature(concat_idents)]
#![feature(const_fn)]
+#![feature(core_float)]
#![feature(custom_attribute)]
#![feature(doc_cfg)]
#![feature(doc_spotlight)]
use intrinsics;
use mem;
use num::Float;
+#[cfg(not(stage0))] use num::FpCategory;
use num::FpCategory as Fp;
/// The radix or base of the internal representation of `f32`.
unsafe { mem::transmute(v) }
}
}
+
+// FIXME: remove (inline) this macro and the Float trait
+// when updating to a bootstrap compiler that has the new lang items.
+#[cfg_attr(stage0, macro_export)]
+#[unstable(feature = "core_float", issue = "32110")]
+macro_rules! f32_core_methods { () => {
+ /// Returns `true` if this value is `NaN` and false otherwise.
+ ///
+ /// ```
+ /// use std::f32;
+ ///
+ /// let nan = f32::NAN;
+ /// let f = 7.0_f32;
+ ///
+ /// assert!(nan.is_nan());
+ /// assert!(!f.is_nan());
+ /// ```
+ #[stable(feature = "rust1", since = "1.0.0")]
+ #[inline]
+ pub fn is_nan(self) -> bool { Float::is_nan(self) }
+
+ /// Returns `true` if this value is positive infinity or negative infinity and
+ /// false otherwise.
+ ///
+ /// ```
+ /// use std::f32;
+ ///
+ /// let f = 7.0f32;
+ /// let inf = f32::INFINITY;
+ /// let neg_inf = f32::NEG_INFINITY;
+ /// let nan = f32::NAN;
+ ///
+ /// assert!(!f.is_infinite());
+ /// assert!(!nan.is_infinite());
+ ///
+ /// assert!(inf.is_infinite());
+ /// assert!(neg_inf.is_infinite());
+ /// ```
+ #[stable(feature = "rust1", since = "1.0.0")]
+ #[inline]
+ pub fn is_infinite(self) -> bool { Float::is_infinite(self) }
+
+ /// Returns `true` if this number is neither infinite nor `NaN`.
+ ///
+ /// ```
+ /// use std::f32;
+ ///
+ /// let f = 7.0f32;
+ /// let inf = f32::INFINITY;
+ /// let neg_inf = f32::NEG_INFINITY;
+ /// let nan = f32::NAN;
+ ///
+ /// assert!(f.is_finite());
+ ///
+ /// assert!(!nan.is_finite());
+ /// assert!(!inf.is_finite());
+ /// assert!(!neg_inf.is_finite());
+ /// ```
+ #[stable(feature = "rust1", since = "1.0.0")]
+ #[inline]
+ pub fn is_finite(self) -> bool { Float::is_finite(self) }
+
+ /// Returns `true` if the number is neither zero, infinite,
+ /// [subnormal][subnormal], or `NaN`.
+ ///
+ /// ```
+ /// use std::f32;
+ ///
+ /// let min = f32::MIN_POSITIVE; // 1.17549435e-38f32
+ /// let max = f32::MAX;
+ /// let lower_than_min = 1.0e-40_f32;
+ /// let zero = 0.0_f32;
+ ///
+ /// assert!(min.is_normal());
+ /// assert!(max.is_normal());
+ ///
+ /// assert!(!zero.is_normal());
+ /// assert!(!f32::NAN.is_normal());
+ /// assert!(!f32::INFINITY.is_normal());
+ /// // Values between `0` and `min` are Subnormal.
+ /// assert!(!lower_than_min.is_normal());
+ /// ```
+ /// [subnormal]: https://en.wikipedia.org/wiki/Denormal_number
+ #[stable(feature = "rust1", since = "1.0.0")]
+ #[inline]
+ pub fn is_normal(self) -> bool { Float::is_normal(self) }
+
+ /// Returns the floating point category of the number. If only one property
+ /// is going to be tested, it is generally faster to use the specific
+ /// predicate instead.
+ ///
+ /// ```
+ /// use std::num::FpCategory;
+ /// use std::f32;
+ ///
+ /// let num = 12.4_f32;
+ /// let inf = f32::INFINITY;
+ ///
+ /// assert_eq!(num.classify(), FpCategory::Normal);
+ /// assert_eq!(inf.classify(), FpCategory::Infinite);
+ /// ```
+ #[stable(feature = "rust1", since = "1.0.0")]
+ #[inline]
+ pub fn classify(self) -> FpCategory { Float::classify(self) }
+
+ /// Returns `true` if and only if `self` has a positive sign, including `+0.0`, `NaN`s with
+ /// positive sign bit and positive infinity.
+ ///
+ /// ```
+ /// let f = 7.0_f32;
+ /// let g = -7.0_f32;
+ ///
+ /// assert!(f.is_sign_positive());
+ /// assert!(!g.is_sign_positive());
+ /// ```
+ #[stable(feature = "rust1", since = "1.0.0")]
+ #[inline]
+ pub fn is_sign_positive(self) -> bool { Float::is_sign_positive(self) }
+
+ /// Returns `true` if and only if `self` has a negative sign, including `-0.0`, `NaN`s with
+ /// negative sign bit and negative infinity.
+ ///
+ /// ```
+ /// let f = 7.0f32;
+ /// let g = -7.0f32;
+ ///
+ /// assert!(!f.is_sign_negative());
+ /// assert!(g.is_sign_negative());
+ /// ```
+ #[stable(feature = "rust1", since = "1.0.0")]
+ #[inline]
+ pub fn is_sign_negative(self) -> bool { Float::is_sign_negative(self) }
+
+ /// Takes the reciprocal (inverse) of a number, `1/x`.
+ ///
+ /// ```
+ /// use std::f32;
+ ///
+ /// let x = 2.0_f32;
+ /// let abs_difference = (x.recip() - (1.0/x)).abs();
+ ///
+ /// assert!(abs_difference <= f32::EPSILON);
+ /// ```
+ #[stable(feature = "rust1", since = "1.0.0")]
+ #[inline]
+ pub fn recip(self) -> f32 { Float::recip(self) }
+
+ /// Converts radians to degrees.
+ ///
+ /// ```
+ /// use std::f32::{self, consts};
+ ///
+ /// let angle = consts::PI;
+ ///
+ /// let abs_difference = (angle.to_degrees() - 180.0).abs();
+ ///
+ /// assert!(abs_difference <= f32::EPSILON);
+ /// ```
+ #[stable(feature = "f32_deg_rad_conversions", since="1.7.0")]
+ #[inline]
+ pub fn to_degrees(self) -> f32 { Float::to_degrees(self) }
+
+ /// Converts degrees to radians.
+ ///
+ /// ```
+ /// use std::f32::{self, consts};
+ ///
+ /// let angle = 180.0f32;
+ ///
+ /// let abs_difference = (angle.to_radians() - consts::PI).abs();
+ ///
+ /// assert!(abs_difference <= f32::EPSILON);
+ /// ```
+ #[stable(feature = "f32_deg_rad_conversions", since="1.7.0")]
+ #[inline]
+ pub fn to_radians(self) -> f32 { Float::to_radians(self) }
+
+ /// Returns the maximum of the two numbers.
+ ///
+ /// ```
+ /// let x = 1.0f32;
+ /// let y = 2.0f32;
+ ///
+ /// assert_eq!(x.max(y), y);
+ /// ```
+ ///
+ /// If one of the arguments is NaN, then the other argument is returned.
+ #[stable(feature = "rust1", since = "1.0.0")]
+ #[inline]
+ pub fn max(self, other: f32) -> f32 {
+ Float::max(self, other)
+ }
+
+ /// Returns the minimum of the two numbers.
+ ///
+ /// ```
+ /// let x = 1.0f32;
+ /// let y = 2.0f32;
+ ///
+ /// assert_eq!(x.min(y), x);
+ /// ```
+ ///
+ /// If one of the arguments is NaN, then the other argument is returned.
+ #[stable(feature = "rust1", since = "1.0.0")]
+ #[inline]
+ pub fn min(self, other: f32) -> f32 {
+ Float::min(self, other)
+ }
+
+ /// Raw transmutation to `u32`.
+ ///
+ /// This is currently identical to `transmute::<f32, u32>(self)` on all platforms.
+ ///
+ /// See `from_bits` for some discussion of the portability of this operation
+ /// (there are almost no issues).
+ ///
+ /// Note that this function is distinct from `as` casting, which attempts to
+ /// preserve the *numeric* value, and not the bitwise value.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// assert_ne!((1f32).to_bits(), 1f32 as u32); // to_bits() is not casting!
+ /// assert_eq!((12.5f32).to_bits(), 0x41480000);
+ ///
+ /// ```
+ #[stable(feature = "float_bits_conv", since = "1.20.0")]
+ #[inline]
+ pub fn to_bits(self) -> u32 {
+ Float::to_bits(self)
+ }
+
+ /// Raw transmutation from `u32`.
+ ///
+ /// This is currently identical to `transmute::<u32, f32>(v)` on all platforms.
+ /// It turns out this is incredibly portable, for two reasons:
+ ///
+ /// * Floats and Ints have the same endianness on all supported platforms.
+ /// * IEEE-754 very precisely specifies the bit layout of floats.
+ ///
+ /// However there is one caveat: prior to the 2008 version of IEEE-754, how
+ /// to interpret the NaN signaling bit wasn't actually specified. Most platforms
+ /// (notably x86 and ARM) picked the interpretation that was ultimately
+ /// standardized in 2008, but some didn't (notably MIPS). As a result, all
+ /// signaling NaNs on MIPS are quiet NaNs on x86, and vice-versa.
+ ///
+ /// Rather than trying to preserve signaling-ness cross-platform, this
+ /// implementation favours preserving the exact bits. This means that
+ /// any payloads encoded in NaNs will be preserved even if the result of
+ /// this method is sent over the network from an x86 machine to a MIPS one.
+ ///
+ /// If the results of this method are only manipulated by the same
+ /// architecture that produced them, then there is no portability concern.
+ ///
+ /// If the input isn't NaN, then there is no portability concern.
+ ///
+ /// If you don't care about signalingness (very likely), then there is no
+ /// portability concern.
+ ///
+ /// Note that this function is distinct from `as` casting, which attempts to
+ /// preserve the *numeric* value, and not the bitwise value.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use std::f32;
+ /// let v = f32::from_bits(0x41480000);
+ /// let difference = (v - 12.5).abs();
+ /// assert!(difference <= 1e-5);
+ /// ```
+ #[stable(feature = "float_bits_conv", since = "1.20.0")]
+ #[inline]
+ pub fn from_bits(v: u32) -> Self {
+ Float::from_bits(v)
+ }
+}}
+
+#[lang = "f32"]
+#[cfg(not(test))]
+#[cfg(not(stage0))]
+impl f32 {
+ f32_core_methods!();
+}
use intrinsics;
use mem;
-use num::FpCategory as Fp;
use num::Float;
+#[cfg(not(stage0))] use num::FpCategory;
+use num::FpCategory as Fp;
/// The radix or base of the internal representation of `f64`.
#[stable(feature = "rust1", since = "1.0.0")]
unsafe { mem::transmute(v) }
}
}
+
+// FIXME: remove (inline) this macro and the Float trait
+// when updating to a bootstrap compiler that has the new lang items.
+#[cfg_attr(stage0, macro_export)]
+#[unstable(feature = "core_float", issue = "32110")]
+macro_rules! f64_core_methods { () => {
+ /// Returns `true` if this value is `NaN` and false otherwise.
+ ///
+ /// ```
+ /// use std::f64;
+ ///
+ /// let nan = f64::NAN;
+ /// let f = 7.0_f64;
+ ///
+ /// assert!(nan.is_nan());
+ /// assert!(!f.is_nan());
+ /// ```
+ #[stable(feature = "rust1", since = "1.0.0")]
+ #[inline]
+ pub fn is_nan(self) -> bool { Float::is_nan(self) }
+
+ /// Returns `true` if this value is positive infinity or negative infinity and
+ /// false otherwise.
+ ///
+ /// ```
+ /// use std::f64;
+ ///
+ /// let f = 7.0f64;
+ /// let inf = f64::INFINITY;
+ /// let neg_inf = f64::NEG_INFINITY;
+ /// let nan = f64::NAN;
+ ///
+ /// assert!(!f.is_infinite());
+ /// assert!(!nan.is_infinite());
+ ///
+ /// assert!(inf.is_infinite());
+ /// assert!(neg_inf.is_infinite());
+ /// ```
+ #[stable(feature = "rust1", since = "1.0.0")]
+ #[inline]
+ pub fn is_infinite(self) -> bool { Float::is_infinite(self) }
+
+ /// Returns `true` if this number is neither infinite nor `NaN`.
+ ///
+ /// ```
+ /// use std::f64;
+ ///
+ /// let f = 7.0f64;
+ /// let inf: f64 = f64::INFINITY;
+ /// let neg_inf: f64 = f64::NEG_INFINITY;
+ /// let nan: f64 = f64::NAN;
+ ///
+ /// assert!(f.is_finite());
+ ///
+ /// assert!(!nan.is_finite());
+ /// assert!(!inf.is_finite());
+ /// assert!(!neg_inf.is_finite());
+ /// ```
+ #[stable(feature = "rust1", since = "1.0.0")]
+ #[inline]
+ pub fn is_finite(self) -> bool { Float::is_finite(self) }
+
+ /// Returns `true` if the number is neither zero, infinite,
+ /// [subnormal][subnormal], or `NaN`.
+ ///
+ /// ```
+ /// use std::f64;
+ ///
+ /// let min = f64::MIN_POSITIVE; // 2.2250738585072014e-308f64
+ /// let max = f64::MAX;
+ /// let lower_than_min = 1.0e-308_f64;
+ /// let zero = 0.0f64;
+ ///
+ /// assert!(min.is_normal());
+ /// assert!(max.is_normal());
+ ///
+ /// assert!(!zero.is_normal());
+ /// assert!(!f64::NAN.is_normal());
+ /// assert!(!f64::INFINITY.is_normal());
+ /// // Values between `0` and `min` are Subnormal.
+ /// assert!(!lower_than_min.is_normal());
+ /// ```
+ /// [subnormal]: https://en.wikipedia.org/wiki/Denormal_number
+ #[stable(feature = "rust1", since = "1.0.0")]
+ #[inline]
+ pub fn is_normal(self) -> bool { Float::is_normal(self) }
+
+ /// Returns the floating point category of the number. If only one property
+ /// is going to be tested, it is generally faster to use the specific
+ /// predicate instead.
+ ///
+ /// ```
+ /// use std::num::FpCategory;
+ /// use std::f64;
+ ///
+ /// let num = 12.4_f64;
+ /// let inf = f64::INFINITY;
+ ///
+ /// assert_eq!(num.classify(), FpCategory::Normal);
+ /// assert_eq!(inf.classify(), FpCategory::Infinite);
+ /// ```
+ #[stable(feature = "rust1", since = "1.0.0")]
+ #[inline]
+ pub fn classify(self) -> FpCategory { Float::classify(self) }
+
+ /// Returns `true` if and only if `self` has a positive sign, including `+0.0`, `NaN`s with
+ /// positive sign bit and positive infinity.
+ ///
+ /// ```
+ /// let f = 7.0_f64;
+ /// let g = -7.0_f64;
+ ///
+ /// assert!(f.is_sign_positive());
+ /// assert!(!g.is_sign_positive());
+ /// ```
+ #[stable(feature = "rust1", since = "1.0.0")]
+ #[inline]
+ pub fn is_sign_positive(self) -> bool { Float::is_sign_positive(self) }
+
+ #[stable(feature = "rust1", since = "1.0.0")]
+ #[rustc_deprecated(since = "1.0.0", reason = "renamed to is_sign_positive")]
+ #[inline]
+ #[doc(hidden)]
+ pub fn is_positive(self) -> bool { Float::is_sign_positive(self) }
+
+ /// Returns `true` if and only if `self` has a negative sign, including `-0.0`, `NaN`s with
+ /// negative sign bit and negative infinity.
+ ///
+ /// ```
+ /// let f = 7.0_f64;
+ /// let g = -7.0_f64;
+ ///
+ /// assert!(!f.is_sign_negative());
+ /// assert!(g.is_sign_negative());
+ /// ```
+ #[stable(feature = "rust1", since = "1.0.0")]
+ #[inline]
+ pub fn is_sign_negative(self) -> bool { Float::is_sign_negative(self) }
+
+ #[stable(feature = "rust1", since = "1.0.0")]
+ #[rustc_deprecated(since = "1.0.0", reason = "renamed to is_sign_negative")]
+ #[inline]
+ #[doc(hidden)]
+ pub fn is_negative(self) -> bool { Float::is_sign_negative(self) }
+
+ /// Takes the reciprocal (inverse) of a number, `1/x`.
+ ///
+ /// ```
+ /// let x = 2.0_f64;
+ /// let abs_difference = (x.recip() - (1.0/x)).abs();
+ ///
+ /// assert!(abs_difference < 1e-10);
+ /// ```
+ #[stable(feature = "rust1", since = "1.0.0")]
+ #[inline]
+ pub fn recip(self) -> f64 { Float::recip(self) }
+
+ /// Converts radians to degrees.
+ ///
+ /// ```
+ /// use std::f64::consts;
+ ///
+ /// let angle = consts::PI;
+ ///
+ /// let abs_difference = (angle.to_degrees() - 180.0).abs();
+ ///
+ /// assert!(abs_difference < 1e-10);
+ /// ```
+ #[stable(feature = "rust1", since = "1.0.0")]
+ #[inline]
+ pub fn to_degrees(self) -> f64 { Float::to_degrees(self) }
+
+ /// Converts degrees to radians.
+ ///
+ /// ```
+ /// use std::f64::consts;
+ ///
+ /// let angle = 180.0_f64;
+ ///
+ /// let abs_difference = (angle.to_radians() - consts::PI).abs();
+ ///
+ /// assert!(abs_difference < 1e-10);
+ /// ```
+ #[stable(feature = "rust1", since = "1.0.0")]
+ #[inline]
+ pub fn to_radians(self) -> f64 { Float::to_radians(self) }
+
+ /// Returns the maximum of the two numbers.
+ ///
+ /// ```
+ /// let x = 1.0_f64;
+ /// let y = 2.0_f64;
+ ///
+ /// assert_eq!(x.max(y), y);
+ /// ```
+ ///
+ /// If one of the arguments is NaN, then the other argument is returned.
+ #[stable(feature = "rust1", since = "1.0.0")]
+ #[inline]
+ pub fn max(self, other: f64) -> f64 {
+ Float::max(self, other)
+ }
+
+ /// Returns the minimum of the two numbers.
+ ///
+ /// ```
+ /// let x = 1.0_f64;
+ /// let y = 2.0_f64;
+ ///
+ /// assert_eq!(x.min(y), x);
+ /// ```
+ ///
+ /// If one of the arguments is NaN, then the other argument is returned.
+ #[stable(feature = "rust1", since = "1.0.0")]
+ #[inline]
+ pub fn min(self, other: f64) -> f64 {
+ Float::min(self, other)
+ }
+
+ /// Raw transmutation to `u64`.
+ ///
+ /// This is currently identical to `transmute::<f64, u64>(self)` on all platforms.
+ ///
+ /// See `from_bits` for some discussion of the portability of this operation
+ /// (there are almost no issues).
+ ///
+ /// Note that this function is distinct from `as` casting, which attempts to
+ /// preserve the *numeric* value, and not the bitwise value.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// assert!((1f64).to_bits() != 1f64 as u64); // to_bits() is not casting!
+ /// assert_eq!((12.5f64).to_bits(), 0x4029000000000000);
+ ///
+ /// ```
+ #[stable(feature = "float_bits_conv", since = "1.20.0")]
+ #[inline]
+ pub fn to_bits(self) -> u64 {
+ Float::to_bits(self)
+ }
+
+ /// Raw transmutation from `u64`.
+ ///
+ /// This is currently identical to `transmute::<u64, f64>(v)` on all platforms.
+ /// It turns out this is incredibly portable, for two reasons:
+ ///
+ /// * Floats and Ints have the same endianness on all supported platforms.
+ /// * IEEE-754 very precisely specifies the bit layout of floats.
+ ///
+ /// However there is one caveat: prior to the 2008 version of IEEE-754, how
+ /// to interpret the NaN signaling bit wasn't actually specified. Most platforms
+ /// (notably x86 and ARM) picked the interpretation that was ultimately
+ /// standardized in 2008, but some didn't (notably MIPS). As a result, all
+ /// signaling NaNs on MIPS are quiet NaNs on x86, and vice-versa.
+ ///
+ /// Rather than trying to preserve signaling-ness cross-platform, this
+ /// implementation favours preserving the exact bits. This means that
+ /// any payloads encoded in NaNs will be preserved even if the result of
+ /// this method is sent over the network from an x86 machine to a MIPS one.
+ ///
+ /// If the results of this method are only manipulated by the same
+ /// architecture that produced them, then there is no portability concern.
+ ///
+ /// If the input isn't NaN, then there is no portability concern.
+ ///
+ /// If you don't care about signalingness (very likely), then there is no
+ /// portability concern.
+ ///
+ /// Note that this function is distinct from `as` casting, which attempts to
+ /// preserve the *numeric* value, and not the bitwise value.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use std::f64;
+ /// let v = f64::from_bits(0x4029000000000000);
+ /// let difference = (v - 12.5).abs();
+ /// assert!(difference <= 1e-5);
+ /// ```
+ #[stable(feature = "float_bits_conv", since = "1.20.0")]
+ #[inline]
+ pub fn from_bits(v: u64) -> Self {
+ Float::from_bits(v)
+ }
+}}
+
+#[lang = "f64"]
+#[cfg(not(test))]
+#[cfg(not(stage0))]
+impl f64 {
+ f64_core_methods!();
+}
UsizeImplItem, "usize", usize_impl;
F32ImplItem, "f32", f32_impl;
F64ImplItem, "f64", f64_impl;
+ F32RuntimeImplItem, "f32_runtime", f32_runtime_impl;
+ F64RuntimeImplItem, "f64_runtime", f64_runtime_impl;
SizedTraitLangItem, "sized", sized_trait;
UnsizeTraitLangItem, "unsize", unsize_trait;
ty::TyFloat(ast::FloatTy::F32) => {
let lang_def_id = lang_items.f32_impl();
self.assemble_inherent_impl_for_primitive(lang_def_id);
+
+ let lang_def_id = lang_items.f32_runtime_impl();
+ self.assemble_inherent_impl_for_primitive(lang_def_id);
}
ty::TyFloat(ast::FloatTy::F64) => {
let lang_def_id = lang_items.f64_impl();
self.assemble_inherent_impl_for_primitive(lang_def_id);
+
+ let lang_def_id = lang_items.f64_runtime_impl();
+ self.assemble_inherent_impl_for_primitive(lang_def_id);
}
_ => {}
}
ty::TyFloat(ast::FloatTy::F32) => {
self.check_primitive_impl(def_id,
lang_items.f32_impl(),
- None,
+ lang_items.f32_runtime_impl(),
"f32",
"f32",
item.span);
ty::TyFloat(ast::FloatTy::F64) => {
self.check_primitive_impl(def_id,
lang_items.f64_impl(),
- None,
+ lang_items.f64_runtime_impl(),
"f64",
"f64",
item.span);
lang_items.u128_impl(),
lang_items.f32_impl(),
lang_items.f64_impl(),
+ lang_items.f32_runtime_impl(),
+ lang_items.f64_runtime_impl(),
lang_items.char_impl(),
lang_items.str_impl(),
lang_items.slice_impl(),
#![allow(missing_docs)]
#[cfg(not(test))]
-use core::num;
+use core::num::Float;
#[cfg(not(test))]
use intrinsics;
#[cfg(not(test))]
+#[cfg(stage0)]
use num::FpCategory;
#[cfg(not(test))]
use sys::cmath;
pub use core::f32::consts;
#[cfg(not(test))]
-#[lang = "f32"]
+#[cfg_attr(stage0, lang = "f32")]
+#[cfg_attr(not(stage0), lang = "f32_runtime")]
impl f32 {
- /// Returns `true` if this value is `NaN` and false otherwise.
- ///
- /// ```
- /// use std::f32;
- ///
- /// let nan = f32::NAN;
- /// let f = 7.0_f32;
- ///
- /// assert!(nan.is_nan());
- /// assert!(!f.is_nan());
- /// ```
- #[stable(feature = "rust1", since = "1.0.0")]
- #[inline]
- pub fn is_nan(self) -> bool { num::Float::is_nan(self) }
-
- /// Returns `true` if this value is positive infinity or negative infinity and
- /// false otherwise.
- ///
- /// ```
- /// use std::f32;
- ///
- /// let f = 7.0f32;
- /// let inf = f32::INFINITY;
- /// let neg_inf = f32::NEG_INFINITY;
- /// let nan = f32::NAN;
- ///
- /// assert!(!f.is_infinite());
- /// assert!(!nan.is_infinite());
- ///
- /// assert!(inf.is_infinite());
- /// assert!(neg_inf.is_infinite());
- /// ```
- #[stable(feature = "rust1", since = "1.0.0")]
- #[inline]
- pub fn is_infinite(self) -> bool { num::Float::is_infinite(self) }
-
- /// Returns `true` if this number is neither infinite nor `NaN`.
- ///
- /// ```
- /// use std::f32;
- ///
- /// let f = 7.0f32;
- /// let inf = f32::INFINITY;
- /// let neg_inf = f32::NEG_INFINITY;
- /// let nan = f32::NAN;
- ///
- /// assert!(f.is_finite());
- ///
- /// assert!(!nan.is_finite());
- /// assert!(!inf.is_finite());
- /// assert!(!neg_inf.is_finite());
- /// ```
- #[stable(feature = "rust1", since = "1.0.0")]
- #[inline]
- pub fn is_finite(self) -> bool { num::Float::is_finite(self) }
-
- /// Returns `true` if the number is neither zero, infinite,
- /// [subnormal][subnormal], or `NaN`.
- ///
- /// ```
- /// use std::f32;
- ///
- /// let min = f32::MIN_POSITIVE; // 1.17549435e-38f32
- /// let max = f32::MAX;
- /// let lower_than_min = 1.0e-40_f32;
- /// let zero = 0.0_f32;
- ///
- /// assert!(min.is_normal());
- /// assert!(max.is_normal());
- ///
- /// assert!(!zero.is_normal());
- /// assert!(!f32::NAN.is_normal());
- /// assert!(!f32::INFINITY.is_normal());
- /// // Values between `0` and `min` are Subnormal.
- /// assert!(!lower_than_min.is_normal());
- /// ```
- /// [subnormal]: https://en.wikipedia.org/wiki/Denormal_number
- #[stable(feature = "rust1", since = "1.0.0")]
- #[inline]
- pub fn is_normal(self) -> bool { num::Float::is_normal(self) }
-
- /// Returns the floating point category of the number. If only one property
- /// is going to be tested, it is generally faster to use the specific
- /// predicate instead.
- ///
- /// ```
- /// use std::num::FpCategory;
- /// use std::f32;
- ///
- /// let num = 12.4_f32;
- /// let inf = f32::INFINITY;
- ///
- /// assert_eq!(num.classify(), FpCategory::Normal);
- /// assert_eq!(inf.classify(), FpCategory::Infinite);
- /// ```
- #[stable(feature = "rust1", since = "1.0.0")]
- #[inline]
- pub fn classify(self) -> FpCategory { num::Float::classify(self) }
+ #[cfg(stage0)]
+ f32_core_methods!();
/// Returns the largest integer less than or equal to a number.
///
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
- pub fn abs(self) -> f32 { num::Float::abs(self) }
+ pub fn abs(self) -> f32 { Float::abs(self) }
/// Returns a number that represents the sign of `self`.
///
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
- pub fn signum(self) -> f32 { num::Float::signum(self) }
-
- /// Returns `true` if and only if `self` has a positive sign, including `+0.0`, `NaN`s with
- /// positive sign bit and positive infinity.
- ///
- /// ```
- /// let f = 7.0_f32;
- /// let g = -7.0_f32;
- ///
- /// assert!(f.is_sign_positive());
- /// assert!(!g.is_sign_positive());
- /// ```
- #[stable(feature = "rust1", since = "1.0.0")]
- #[inline]
- pub fn is_sign_positive(self) -> bool { num::Float::is_sign_positive(self) }
-
- /// Returns `true` if and only if `self` has a negative sign, including `-0.0`, `NaN`s with
- /// negative sign bit and negative infinity.
- ///
- /// ```
- /// let f = 7.0f32;
- /// let g = -7.0f32;
- ///
- /// assert!(!f.is_sign_negative());
- /// assert!(g.is_sign_negative());
- /// ```
- #[stable(feature = "rust1", since = "1.0.0")]
- #[inline]
- pub fn is_sign_negative(self) -> bool { num::Float::is_sign_negative(self) }
+ pub fn signum(self) -> f32 { Float::signum(self) }
/// Fused multiply-add. Computes `(self * a) + b` with only one rounding
/// error. This produces a more accurate result with better performance than
}
- /// Takes the reciprocal (inverse) of a number, `1/x`.
- ///
- /// ```
- /// use std::f32;
- ///
- /// let x = 2.0_f32;
- /// let abs_difference = (x.recip() - (1.0/x)).abs();
- ///
- /// assert!(abs_difference <= f32::EPSILON);
- /// ```
- #[stable(feature = "rust1", since = "1.0.0")]
- #[inline]
- pub fn recip(self) -> f32 { num::Float::recip(self) }
-
/// Raises a number to an integer power.
///
/// Using this function is generally faster than using `powf`
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
- pub fn powi(self, n: i32) -> f32 { num::Float::powi(self, n) }
+ pub fn powi(self, n: i32) -> f32 { Float::powi(self, n) }
/// Raises a number to a floating point power.
///
return unsafe { intrinsics::log10f32(self) };
}
- /// Converts radians to degrees.
- ///
- /// ```
- /// use std::f32::{self, consts};
- ///
- /// let angle = consts::PI;
- ///
- /// let abs_difference = (angle.to_degrees() - 180.0).abs();
- ///
- /// assert!(abs_difference <= f32::EPSILON);
- /// ```
- #[stable(feature = "f32_deg_rad_conversions", since="1.7.0")]
- #[inline]
- pub fn to_degrees(self) -> f32 { num::Float::to_degrees(self) }
-
- /// Converts degrees to radians.
- ///
- /// ```
- /// use std::f32::{self, consts};
- ///
- /// let angle = 180.0f32;
- ///
- /// let abs_difference = (angle.to_radians() - consts::PI).abs();
- ///
- /// assert!(abs_difference <= f32::EPSILON);
- /// ```
- #[stable(feature = "f32_deg_rad_conversions", since="1.7.0")]
- #[inline]
- pub fn to_radians(self) -> f32 { num::Float::to_radians(self) }
-
- /// Returns the maximum of the two numbers.
- ///
- /// ```
- /// let x = 1.0f32;
- /// let y = 2.0f32;
- ///
- /// assert_eq!(x.max(y), y);
- /// ```
- ///
- /// If one of the arguments is NaN, then the other argument is returned.
- #[stable(feature = "rust1", since = "1.0.0")]
- #[inline]
- pub fn max(self, other: f32) -> f32 {
- num::Float::max(self, other)
- }
-
- /// Returns the minimum of the two numbers.
- ///
- /// ```
- /// let x = 1.0f32;
- /// let y = 2.0f32;
- ///
- /// assert_eq!(x.min(y), x);
- /// ```
- ///
- /// If one of the arguments is NaN, then the other argument is returned.
- #[stable(feature = "rust1", since = "1.0.0")]
- #[inline]
- pub fn min(self, other: f32) -> f32 {
- num::Float::min(self, other)
- }
-
/// The positive difference of two numbers.
///
/// * If `self <= other`: `0:0`
pub fn atanh(self) -> f32 {
0.5 * ((2.0 * self) / (1.0 - self)).ln_1p()
}
-
- /// Raw transmutation to `u32`.
- ///
- /// This is currently identical to `transmute::<f32, u32>(self)` on all platforms.
- ///
- /// See `from_bits` for some discussion of the portability of this operation
- /// (there are almost no issues).
- ///
- /// Note that this function is distinct from `as` casting, which attempts to
- /// preserve the *numeric* value, and not the bitwise value.
- ///
- /// # Examples
- ///
- /// ```
- /// assert_ne!((1f32).to_bits(), 1f32 as u32); // to_bits() is not casting!
- /// assert_eq!((12.5f32).to_bits(), 0x41480000);
- ///
- /// ```
- #[stable(feature = "float_bits_conv", since = "1.20.0")]
- #[inline]
- pub fn to_bits(self) -> u32 {
- num::Float::to_bits(self)
- }
-
- /// Raw transmutation from `u32`.
- ///
- /// This is currently identical to `transmute::<u32, f32>(v)` on all platforms.
- /// It turns out this is incredibly portable, for two reasons:
- ///
- /// * Floats and Ints have the same endianness on all supported platforms.
- /// * IEEE-754 very precisely specifies the bit layout of floats.
- ///
- /// However there is one caveat: prior to the 2008 version of IEEE-754, how
- /// to interpret the NaN signaling bit wasn't actually specified. Most platforms
- /// (notably x86 and ARM) picked the interpretation that was ultimately
- /// standardized in 2008, but some didn't (notably MIPS). As a result, all
- /// signaling NaNs on MIPS are quiet NaNs on x86, and vice-versa.
- ///
- /// Rather than trying to preserve signaling-ness cross-platform, this
- /// implementation favours preserving the exact bits. This means that
- /// any payloads encoded in NaNs will be preserved even if the result of
- /// this method is sent over the network from an x86 machine to a MIPS one.
- ///
- /// If the results of this method are only manipulated by the same
- /// architecture that produced them, then there is no portability concern.
- ///
- /// If the input isn't NaN, then there is no portability concern.
- ///
- /// If you don't care about signalingness (very likely), then there is no
- /// portability concern.
- ///
- /// Note that this function is distinct from `as` casting, which attempts to
- /// preserve the *numeric* value, and not the bitwise value.
- ///
- /// # Examples
- ///
- /// ```
- /// use std::f32;
- /// let v = f32::from_bits(0x41480000);
- /// let difference = (v - 12.5).abs();
- /// assert!(difference <= 1e-5);
- /// ```
- #[stable(feature = "float_bits_conv", since = "1.20.0")]
- #[inline]
- pub fn from_bits(v: u32) -> Self {
- num::Float::from_bits(v)
- }
}
#[cfg(test)]
#![allow(missing_docs)]
#[cfg(not(test))]
-use core::num;
+use core::num::Float;
#[cfg(not(test))]
use intrinsics;
#[cfg(not(test))]
+#[cfg(stage0)]
use num::FpCategory;
#[cfg(not(test))]
use sys::cmath;
pub use core::f64::consts;
#[cfg(not(test))]
-#[lang = "f64"]
+#[cfg_attr(stage0, lang = "f64")]
+#[cfg_attr(not(stage0), lang = "f64_runtime")]
impl f64 {
- /// Returns `true` if this value is `NaN` and false otherwise.
- ///
- /// ```
- /// use std::f64;
- ///
- /// let nan = f64::NAN;
- /// let f = 7.0_f64;
- ///
- /// assert!(nan.is_nan());
- /// assert!(!f.is_nan());
- /// ```
- #[stable(feature = "rust1", since = "1.0.0")]
- #[inline]
- pub fn is_nan(self) -> bool { num::Float::is_nan(self) }
-
- /// Returns `true` if this value is positive infinity or negative infinity and
- /// false otherwise.
- ///
- /// ```
- /// use std::f64;
- ///
- /// let f = 7.0f64;
- /// let inf = f64::INFINITY;
- /// let neg_inf = f64::NEG_INFINITY;
- /// let nan = f64::NAN;
- ///
- /// assert!(!f.is_infinite());
- /// assert!(!nan.is_infinite());
- ///
- /// assert!(inf.is_infinite());
- /// assert!(neg_inf.is_infinite());
- /// ```
- #[stable(feature = "rust1", since = "1.0.0")]
- #[inline]
- pub fn is_infinite(self) -> bool { num::Float::is_infinite(self) }
-
- /// Returns `true` if this number is neither infinite nor `NaN`.
- ///
- /// ```
- /// use std::f64;
- ///
- /// let f = 7.0f64;
- /// let inf: f64 = f64::INFINITY;
- /// let neg_inf: f64 = f64::NEG_INFINITY;
- /// let nan: f64 = f64::NAN;
- ///
- /// assert!(f.is_finite());
- ///
- /// assert!(!nan.is_finite());
- /// assert!(!inf.is_finite());
- /// assert!(!neg_inf.is_finite());
- /// ```
- #[stable(feature = "rust1", since = "1.0.0")]
- #[inline]
- pub fn is_finite(self) -> bool { num::Float::is_finite(self) }
-
- /// Returns `true` if the number is neither zero, infinite,
- /// [subnormal][subnormal], or `NaN`.
- ///
- /// ```
- /// use std::f64;
- ///
- /// let min = f64::MIN_POSITIVE; // 2.2250738585072014e-308f64
- /// let max = f64::MAX;
- /// let lower_than_min = 1.0e-308_f64;
- /// let zero = 0.0f64;
- ///
- /// assert!(min.is_normal());
- /// assert!(max.is_normal());
- ///
- /// assert!(!zero.is_normal());
- /// assert!(!f64::NAN.is_normal());
- /// assert!(!f64::INFINITY.is_normal());
- /// // Values between `0` and `min` are Subnormal.
- /// assert!(!lower_than_min.is_normal());
- /// ```
- /// [subnormal]: https://en.wikipedia.org/wiki/Denormal_number
- #[stable(feature = "rust1", since = "1.0.0")]
- #[inline]
- pub fn is_normal(self) -> bool { num::Float::is_normal(self) }
-
- /// Returns the floating point category of the number. If only one property
- /// is going to be tested, it is generally faster to use the specific
- /// predicate instead.
- ///
- /// ```
- /// use std::num::FpCategory;
- /// use std::f64;
- ///
- /// let num = 12.4_f64;
- /// let inf = f64::INFINITY;
- ///
- /// assert_eq!(num.classify(), FpCategory::Normal);
- /// assert_eq!(inf.classify(), FpCategory::Infinite);
- /// ```
- #[stable(feature = "rust1", since = "1.0.0")]
- #[inline]
- pub fn classify(self) -> FpCategory { num::Float::classify(self) }
+ #[cfg(stage0)]
+ f64_core_methods!();
/// Returns the largest integer less than or equal to a number.
///
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
- pub fn abs(self) -> f64 { num::Float::abs(self) }
+ pub fn abs(self) -> f64 { Float::abs(self) }
/// Returns a number that represents the sign of `self`.
///
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
- pub fn signum(self) -> f64 { num::Float::signum(self) }
-
- /// Returns `true` if and only if `self` has a positive sign, including `+0.0`, `NaN`s with
- /// positive sign bit and positive infinity.
- ///
- /// ```
- /// let f = 7.0_f64;
- /// let g = -7.0_f64;
- ///
- /// assert!(f.is_sign_positive());
- /// assert!(!g.is_sign_positive());
- /// ```
- #[stable(feature = "rust1", since = "1.0.0")]
- #[inline]
- pub fn is_sign_positive(self) -> bool { num::Float::is_sign_positive(self) }
-
- #[stable(feature = "rust1", since = "1.0.0")]
- #[rustc_deprecated(since = "1.0.0", reason = "renamed to is_sign_positive")]
- #[inline]
- pub fn is_positive(self) -> bool { num::Float::is_sign_positive(self) }
-
- /// Returns `true` if and only if `self` has a negative sign, including `-0.0`, `NaN`s with
- /// negative sign bit and negative infinity.
- ///
- /// ```
- /// let f = 7.0_f64;
- /// let g = -7.0_f64;
- ///
- /// assert!(!f.is_sign_negative());
- /// assert!(g.is_sign_negative());
- /// ```
- #[stable(feature = "rust1", since = "1.0.0")]
- #[inline]
- pub fn is_sign_negative(self) -> bool { num::Float::is_sign_negative(self) }
-
- #[stable(feature = "rust1", since = "1.0.0")]
- #[rustc_deprecated(since = "1.0.0", reason = "renamed to is_sign_negative")]
- #[inline]
- pub fn is_negative(self) -> bool { num::Float::is_sign_negative(self) }
+ pub fn signum(self) -> f64 { Float::signum(self) }
/// Fused multiply-add. Computes `(self * a) + b` with only one rounding
/// error. This produces a more accurate result with better performance than
}
}
- /// Takes the reciprocal (inverse) of a number, `1/x`.
- ///
- /// ```
- /// let x = 2.0_f64;
- /// let abs_difference = (x.recip() - (1.0/x)).abs();
- ///
- /// assert!(abs_difference < 1e-10);
- /// ```
- #[stable(feature = "rust1", since = "1.0.0")]
- #[inline]
- pub fn recip(self) -> f64 { num::Float::recip(self) }
-
/// Raises a number to an integer power.
///
/// Using this function is generally faster than using `powf`
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
- pub fn powi(self, n: i32) -> f64 { num::Float::powi(self, n) }
+ pub fn powi(self, n: i32) -> f64 { Float::powi(self, n) }
/// Raises a number to a floating point power.
///
self.log_wrapper(|n| { unsafe { intrinsics::log10f64(n) } })
}
- /// Converts radians to degrees.
- ///
- /// ```
- /// use std::f64::consts;
- ///
- /// let angle = consts::PI;
- ///
- /// let abs_difference = (angle.to_degrees() - 180.0).abs();
- ///
- /// assert!(abs_difference < 1e-10);
- /// ```
- #[stable(feature = "rust1", since = "1.0.0")]
- #[inline]
- pub fn to_degrees(self) -> f64 { num::Float::to_degrees(self) }
-
- /// Converts degrees to radians.
- ///
- /// ```
- /// use std::f64::consts;
- ///
- /// let angle = 180.0_f64;
- ///
- /// let abs_difference = (angle.to_radians() - consts::PI).abs();
- ///
- /// assert!(abs_difference < 1e-10);
- /// ```
- #[stable(feature = "rust1", since = "1.0.0")]
- #[inline]
- pub fn to_radians(self) -> f64 { num::Float::to_radians(self) }
-
- /// Returns the maximum of the two numbers.
- ///
- /// ```
- /// let x = 1.0_f64;
- /// let y = 2.0_f64;
- ///
- /// assert_eq!(x.max(y), y);
- /// ```
- ///
- /// If one of the arguments is NaN, then the other argument is returned.
- #[stable(feature = "rust1", since = "1.0.0")]
- #[inline]
- pub fn max(self, other: f64) -> f64 {
- num::Float::max(self, other)
- }
-
- /// Returns the minimum of the two numbers.
- ///
- /// ```
- /// let x = 1.0_f64;
- /// let y = 2.0_f64;
- ///
- /// assert_eq!(x.min(y), x);
- /// ```
- ///
- /// If one of the arguments is NaN, then the other argument is returned.
- #[stable(feature = "rust1", since = "1.0.0")]
- #[inline]
- pub fn min(self, other: f64) -> f64 {
- num::Float::min(self, other)
- }
-
/// The positive difference of two numbers.
///
/// * If `self <= other`: `0:0`
}
}
}
-
- /// Raw transmutation to `u64`.
- ///
- /// This is currently identical to `transmute::<f64, u64>(self)` on all platforms.
- ///
- /// See `from_bits` for some discussion of the portability of this operation
- /// (there are almost no issues).
- ///
- /// Note that this function is distinct from `as` casting, which attempts to
- /// preserve the *numeric* value, and not the bitwise value.
- ///
- /// # Examples
- ///
- /// ```
- /// assert!((1f64).to_bits() != 1f64 as u64); // to_bits() is not casting!
- /// assert_eq!((12.5f64).to_bits(), 0x4029000000000000);
- ///
- /// ```
- #[stable(feature = "float_bits_conv", since = "1.20.0")]
- #[inline]
- pub fn to_bits(self) -> u64 {
- num::Float::to_bits(self)
- }
-
- /// Raw transmutation from `u64`.
- ///
- /// This is currently identical to `transmute::<u64, f64>(v)` on all platforms.
- /// It turns out this is incredibly portable, for two reasons:
- ///
- /// * Floats and Ints have the same endianness on all supported platforms.
- /// * IEEE-754 very precisely specifies the bit layout of floats.
- ///
- /// However there is one caveat: prior to the 2008 version of IEEE-754, how
- /// to interpret the NaN signaling bit wasn't actually specified. Most platforms
- /// (notably x86 and ARM) picked the interpretation that was ultimately
- /// standardized in 2008, but some didn't (notably MIPS). As a result, all
- /// signaling NaNs on MIPS are quiet NaNs on x86, and vice-versa.
- ///
- /// Rather than trying to preserve signaling-ness cross-platform, this
- /// implementation favours preserving the exact bits. This means that
- /// any payloads encoded in NaNs will be preserved even if the result of
- /// this method is sent over the network from an x86 machine to a MIPS one.
- ///
- /// If the results of this method are only manipulated by the same
- /// architecture that produced them, then there is no portability concern.
- ///
- /// If the input isn't NaN, then there is no portability concern.
- ///
- /// If you don't care about signalingness (very likely), then there is no
- /// portability concern.
- ///
- /// Note that this function is distinct from `as` casting, which attempts to
- /// preserve the *numeric* value, and not the bitwise value.
- ///
- /// # Examples
- ///
- /// ```
- /// use std::f64;
- /// let v = f64::from_bits(0x4029000000000000);
- /// let difference = (v - 12.5).abs();
- /// assert!(difference <= 1e-5);
- /// ```
- #[stable(feature = "float_bits_conv", since = "1.20.0")]
- #[inline]
- pub fn from_bits(v: u64) -> Self {
- num::Float::from_bits(v)
- }
}
#[cfg(test)]
projects / rust.git / commitdiff