[−][src]Trait num_traits::cast::ToPrimitive
A generic trait for converting a value to a number.
Required methods
fn to_i64(&self) -> Option<i64>
Converts the value of self
to an i64
. If the value cannot be
represented by an i64
, then None
is returned.
fn to_u64(&self) -> Option<u64>
Converts the value of self
to a u64
. If the value cannot be
represented by a u64
, then None
is returned.
Provided methods
fn to_isize(&self) -> Option<isize>
Converts the value of self
to an isize
. If the value cannot be
represented by an isize
, then None
is returned.
fn to_i8(&self) -> Option<i8>
Converts the value of self
to an i8
. If the value cannot be
represented by an i8
, then None
is returned.
fn to_i16(&self) -> Option<i16>
Converts the value of self
to an i16
. If the value cannot be
represented by an i16
, then None
is returned.
fn to_i32(&self) -> Option<i32>
Converts the value of self
to an i32
. If the value cannot be
represented by an i32
, then None
is returned.
fn to_i128(&self) -> Option<i128>
Converts the value of self
to an i128
. If the value cannot be
represented by an i128
(i64
under the default implementation), then
None
is returned.
This method is only available with feature i128
enabled on Rust >= 1.26.
The default implementation converts through to_i64()
. Types implementing
this trait should override this method if they can represent a greater range.
fn to_usize(&self) -> Option<usize>
Converts the value of self
to a usize
. If the value cannot be
represented by a usize
, then None
is returned.
fn to_u8(&self) -> Option<u8>
Converts the value of self
to a u8
. If the value cannot be
represented by a u8
, then None
is returned.
fn to_u16(&self) -> Option<u16>
Converts the value of self
to a u16
. If the value cannot be
represented by a u16
, then None
is returned.
fn to_u32(&self) -> Option<u32>
Converts the value of self
to a u32
. If the value cannot be
represented by a u32
, then None
is returned.
fn to_u128(&self) -> Option<u128>
Converts the value of self
to a u128
. If the value cannot be
represented by a u128
(u64
under the default implementation), then
None
is returned.
This method is only available with feature i128
enabled on Rust >= 1.26.
The default implementation converts through to_u64()
. Types implementing
this trait should override this method if they can represent a greater range.
fn to_f32(&self) -> Option<f32>
Converts the value of self
to an f32
. If the value cannot be
represented by an f32
, then None
is returned.
fn to_f64(&self) -> Option<f64>
Converts the value of self
to an f64
. If the value cannot be
represented by an f64
, then None
is returned.