#[non_exhaustive]pub enum Constant {
Log2,
Pi,
Euler,
Catalan,
}
Expand description
The available floating-point constants.
Examples
use rug::float::Constant;
use rug::Float;
let log2 = Float::with_val(53, Constant::Log2);
let pi = Float::with_val(53, Constant::Pi);
let euler = Float::with_val(53, Constant::Euler);
let catalan = Float::with_val(53, Constant::Catalan);
assert_eq!(log2.to_string_radix(10, Some(5)), "6.9315e-1");
assert_eq!(pi.to_string_radix(10, Some(5)), "3.1416");
assert_eq!(euler.to_string_radix(10, Some(5)), "5.7722e-1");
assert_eq!(catalan.to_string_radix(10, Some(5)), "9.1597e-1");
Variants (Non-exhaustive)§
This enum is marked as non-exhaustive
Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.
Log2
The logarithm of two, 0.693147…
Pi
The value of pi, π = 3.14159…
Euler
Euler’s constant, also known as the Euler-Mascheroni constant, γ = 0.577215…
Note that this is not Euler’s number e, which can be obtained using
one of the exp
functions.
Catalan
Catalan’s constant, 0.915965…
Trait Implementations§
source§impl AssignRound<&Constant> for Float
impl AssignRound<&Constant> for Float
source§impl AssignRound<Constant> for Float
impl AssignRound<Constant> for Float
source§impl Ord for Constant
impl Ord for Constant
source§impl PartialEq<Constant> for Constant
impl PartialEq<Constant> for Constant
source§impl PartialOrd<Constant> for Constant
impl PartialOrd<Constant> for Constant
1.0.0 · source§fn le(&self, other: &Rhs) -> bool
fn le(&self, other: &Rhs) -> bool
This method tests less than or equal to (for
self
and other
) and is used by the <=
operator. Read moreimpl Copy for Constant
impl Eq for Constant
impl StructuralEq for Constant
impl StructuralPartialEq for Constant
Auto Trait Implementations§
impl RefUnwindSafe for Constant
impl Send for Constant
impl Sync for Constant
impl Unpin for Constant
impl UnwindSafe for Constant
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
source§impl<T> CheckedAs for T
impl<T> CheckedAs for T
source§fn checked_as<Dst>(self) -> Option<Dst>where
T: CheckedCast<Dst>,
fn checked_as<Dst>(self) -> Option<Dst>where T: CheckedCast<Dst>,
Casts the value.
source§impl<Src, Dst> CheckedCastFrom<Src> for Dstwhere
Src: CheckedCast<Dst>,
impl<Src, Dst> CheckedCastFrom<Src> for Dstwhere Src: CheckedCast<Dst>,
source§fn checked_cast_from(src: Src) -> Option<Dst>
fn checked_cast_from(src: Src) -> Option<Dst>
Casts the value.
source§impl<T> OverflowingAs for T
impl<T> OverflowingAs for T
source§fn overflowing_as<Dst>(self) -> (Dst, bool)where
T: OverflowingCast<Dst>,
fn overflowing_as<Dst>(self) -> (Dst, bool)where T: OverflowingCast<Dst>,
Casts the value.
source§impl<Src, Dst> OverflowingCastFrom<Src> for Dstwhere
Src: OverflowingCast<Dst>,
impl<Src, Dst> OverflowingCastFrom<Src> for Dstwhere Src: OverflowingCast<Dst>,
source§fn overflowing_cast_from(src: Src) -> (Dst, bool)
fn overflowing_cast_from(src: Src) -> (Dst, bool)
Casts the value.
source§impl<T> SaturatingAs for T
impl<T> SaturatingAs for T
source§fn saturating_as<Dst>(self) -> Dstwhere
T: SaturatingCast<Dst>,
fn saturating_as<Dst>(self) -> Dstwhere T: SaturatingCast<Dst>,
Casts the value.
source§impl<Src, Dst> SaturatingCastFrom<Src> for Dstwhere
Src: SaturatingCast<Dst>,
impl<Src, Dst> SaturatingCastFrom<Src> for Dstwhere Src: SaturatingCast<Dst>,
source§fn saturating_cast_from(src: Src) -> Dst
fn saturating_cast_from(src: Src) -> Dst
Casts the value.
source§impl<T> UnwrappedAs for T
impl<T> UnwrappedAs for T
source§fn unwrapped_as<Dst>(self) -> Dstwhere
T: UnwrappedCast<Dst>,
fn unwrapped_as<Dst>(self) -> Dstwhere T: UnwrappedCast<Dst>,
Casts the value.
source§impl<Src, Dst> UnwrappedCastFrom<Src> for Dstwhere
Src: UnwrappedCast<Dst>,
impl<Src, Dst> UnwrappedCastFrom<Src> for Dstwhere Src: UnwrappedCast<Dst>,
source§fn unwrapped_cast_from(src: Src) -> Dst
fn unwrapped_cast_from(src: Src) -> Dst
Casts the value.
source§impl<T> WrappingAs for T
impl<T> WrappingAs for T
source§fn wrapping_as<Dst>(self) -> Dstwhere
T: WrappingCast<Dst>,
fn wrapping_as<Dst>(self) -> Dstwhere T: WrappingCast<Dst>,
Casts the value.
source§impl<Src, Dst> WrappingCastFrom<Src> for Dstwhere
Src: WrappingCast<Dst>,
impl<Src, Dst> WrappingCastFrom<Src> for Dstwhere Src: WrappingCast<Dst>,
source§fn wrapping_cast_from(src: Src) -> Dst
fn wrapping_cast_from(src: Src) -> Dst
Casts the value.