Trait option_operations::mul::OptionCheckedMul

pub trait OptionCheckedMul<Rhs = Self, InnerRhs = Rhs> {
    type Output;

    // Required method
    fn opt_checked_mul(self, rhs: Rhs) -> Result<Option<Self::Output>, Error>;
}

Trait for values and Options checked multiplication.

Implementing this trait leads to the following auto-implementations:

• OptionCheckedMul<Option<InnerRhs>> for T.
• OptionCheckedMul<Rhs> for Option<T>.
• OptionCheckedMul<Option<InnerRhs>> for Option<T>.
• … and some variants with references.

Note that since the std library doesn’t define any CheckedMul trait, users must provide the base implementation for the inner type.

Required Associated Types

type Output

The resulting inner type after applying the multiplication.

Required Methods

fn opt_checked_mul(self, rhs: Rhs) -> Result<Option<Self::Output>, Error>

Computes the checked multiplication.

• Returns Ok(Some(result)) if result could be computed.
• Returns Ok(None) if at least one argument is None.
• Returns Err(Error::Overflow) if an overflow occured.

Implementations on Foreign Types

impl OptionCheckedMul for i8

type Output = i8

fn opt_checked_mul(self, rhs: Self) -> Result<Option<Self::Output>, Error>

impl OptionCheckedMul for i16

type Output = i16

fn opt_checked_mul(self, rhs: Self) -> Result<Option<Self::Output>, Error>

impl OptionCheckedMul for i32

type Output = i32

fn opt_checked_mul(self, rhs: Self) -> Result<Option<Self::Output>, Error>

impl OptionCheckedMul for i64

type Output = i64

fn opt_checked_mul(self, rhs: Self) -> Result<Option<Self::Output>, Error>

impl OptionCheckedMul for i128

type Output = i128

fn opt_checked_mul(self, rhs: Self) -> Result<Option<Self::Output>, Error>

impl OptionCheckedMul for u8

type Output = u8

fn opt_checked_mul(self, rhs: Self) -> Result<Option<Self::Output>, Error>

impl OptionCheckedMul for u16

type Output = u16

fn opt_checked_mul(self, rhs: Self) -> Result<Option<Self::Output>, Error>

impl OptionCheckedMul for u32

type Output = u32

fn opt_checked_mul(self, rhs: Self) -> Result<Option<Self::Output>, Error>

impl OptionCheckedMul for u64

type Output = u64

fn opt_checked_mul(self, rhs: Self) -> Result<Option<Self::Output>, Error>

impl OptionCheckedMul for u128

type Output = u128

fn opt_checked_mul(self, rhs: Self) -> Result<Option<Self::Output>, Error>

impl OptionCheckedMul<u32> for Duration

type Output = Duration

fn opt_checked_mul(self, rhs: u32) -> Result<Option<Self::Output>, Error>

impl<T, InnerRhs> OptionCheckedMul<&Option<InnerRhs>, InnerRhs> for Option<T>

where T: OptionOperations + OptionCheckedMul<InnerRhs>, InnerRhs: Copy,

type Output = <T as OptionCheckedMul<InnerRhs>>::Output

fn opt_checked_mul( self, rhs: &Option<InnerRhs>, ) -> Result<Option<Self::Output>, Error>

impl<T, InnerRhs> OptionCheckedMul<Option<InnerRhs>, InnerRhs> for Option<T>

where T: OptionOperations + OptionCheckedMul<InnerRhs>,

type Output = <T as OptionCheckedMul<InnerRhs>>::Output

fn opt_checked_mul( self, rhs: Option<InnerRhs>, ) -> Result<Option<Self::Output>, Error>

impl<T, Rhs> OptionCheckedMul<Rhs> for Option<T>

where T: OptionOperations + OptionCheckedMul<Rhs>,

type Output = <T as OptionCheckedMul<Rhs>>::Output

fn opt_checked_mul(self, rhs: Rhs) -> Result<Option<Self::Output>, Error>

Implementors

impl<T, InnerRhs> OptionCheckedMul<&Option<InnerRhs>, InnerRhs> for T

where T: OptionOperations + OptionCheckedMul<InnerRhs>, InnerRhs: Copy,

type Output = <T as OptionCheckedMul<InnerRhs>>::Output

impl<T, InnerRhs> OptionCheckedMul<Option<InnerRhs>, InnerRhs> for T

where T: OptionOperations + OptionCheckedMul<InnerRhs>,

type Output = <T as OptionCheckedMul<InnerRhs>>::Output