Enum CastMode

pub enum CastMode {
    Saturated,
    Truncated,
}

Cast mode defines the rules of conversion from the native value of a certain programming language to the serialized field value.

Cast mode may be left undefined, in which case the default will be used.

Variants

Saturated

This is the default cast mode, which will be used if the attribute definition does not specify the cast mode explicitly.

For integers, it prevents an integer overflow - for example, attempting to write 0x44 to a 4-bit field will result in a bitfield value of 0x0F. For floating point values, it prevents overflow when casting to a lower precision floating point representation - for example, 65536.0 will be converted to a float16 as 65504.0; infinity will be preserved.

Truncated

For integers, it discards the excess most significant bits - for example, attempting to write 0x44 to a 4-bit field will produce 0x04. For floating point values, overflow during downcasting will produce an infinity.

Trait Implementations

impl Clone for CastMode

fn clone(&self) -> CastMode

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for CastMode

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for CastMode

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl FromStr for CastMode

type Err = ParseCastModeError

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl PartialEq for CastMode

fn eq(&self, other: &CastMode) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for CastMode

impl Eq for CastMode

impl StructuralPartialEq for CastMode