Trait enum_primitive::cast::FromPrimitive
source · pub trait FromPrimitive: Sized {
// Required methods
fn from_i64(n: i64) -> Option<Self>;
fn from_u64(n: u64) -> Option<Self>;
// Provided methods
fn from_isize(n: isize) -> Option<Self> { ... }
fn from_i8(n: i8) -> Option<Self> { ... }
fn from_i16(n: i16) -> Option<Self> { ... }
fn from_i32(n: i32) -> Option<Self> { ... }
fn from_usize(n: usize) -> Option<Self> { ... }
fn from_u8(n: u8) -> Option<Self> { ... }
fn from_u16(n: u16) -> Option<Self> { ... }
fn from_u32(n: u32) -> Option<Self> { ... }
}
Expand description
A generic trait for converting a number to a value.
Required Methods§
Provided Methods§
sourcefn from_isize(n: isize) -> Option<Self>
fn from_isize(n: isize) -> Option<Self>
Convert an isize
to return an optional value of this type. If the
value cannot be represented by this value, then None
is returned.
sourcefn from_i8(n: i8) -> Option<Self>
fn from_i8(n: i8) -> Option<Self>
Convert an i8
to return an optional value of this type. If the
type cannot be represented by this value, then None
is returned.
sourcefn from_i16(n: i16) -> Option<Self>
fn from_i16(n: i16) -> Option<Self>
Convert an i16
to return an optional value of this type. If the
type cannot be represented by this value, then None
is returned.
sourcefn from_i32(n: i32) -> Option<Self>
fn from_i32(n: i32) -> Option<Self>
Convert an i32
to return an optional value of this type. If the
type cannot be represented by this value, then None
is returned.
sourcefn from_usize(n: usize) -> Option<Self>
fn from_usize(n: usize) -> Option<Self>
Convert a usize
to return an optional value of this type. If the
type cannot be represented by this value, then None
is returned.
sourcefn from_u8(n: u8) -> Option<Self>
fn from_u8(n: u8) -> Option<Self>
Convert an u8
to return an optional value of this type. If the
type cannot be represented by this value, then None
is returned.