Struct Tristate 

pub struct Tristate(/* private fields */);

A tristate type is basically a bool wrapped in an option, where None represents ‘m’, or the ‘maybe’ state.

Implementations

impl Tristate

pub const MAYBE: Self

pub const TRUE: Self

pub const FALSE: Self

Trait Implementations

impl Clone for Tristate

fn clone(&self) -> Tristate

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Tristate

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

Formats the value using the given formatter.

impl Default for Tristate

fn default() -> Self

Returns the “default value” for a type.

impl Display for Tristate

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

Formats the value using the given formatter.

impl From<&str> for Tristate

fn from(v: &str) -> Self

Converts to this type from the input type.

impl From<Tristate> for Variant

fn from(t: Tristate) -> Self

Creates a variant from a tristate value

impl From<bool> for Tristate

fn from(b: bool) -> Self

Converts to this type from the input type.

impl Into<Tristate> for Variant

fn into(self) -> Tristate

Converts the variant into a tristate value, using the Self::to_tristate() function.

impl Not for Tristate

type Output = Tristate

The resulting type after applying the ! operator.

fn not(self) -> Self::Output

Performs the unary ! operation.

impl Ord for Tristate

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for Tristate

fn eq(&self, other: &Tristate) -> 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 PartialOrd for Tristate

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Copy for Tristate

impl Eq for Tristate

impl StructuralPartialEq for Tristate