Struct MatchNoneConstraint 

pub struct MatchNoneConstraint { /* private fields */ }

A constraint that matches no versions (empty/impossible constraint).

Implementations

impl MatchNoneConstraint

pub fn new() -> Self

Create a new match-none constraint.

Trait Implementations

impl Clone for MatchNoneConstraint

fn clone(&self) -> MatchNoneConstraint

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Constraint for MatchNoneConstraint

fn matches(&self, _other: &dyn Constraint) -> bool

Check if this constraint matches/intersects with another.

fn lower_bound(&self) -> Bound

Get the lower bound of this constraint.

fn upper_bound(&self) -> Bound

Get the upper bound of this constraint.

fn is_match_none(&self) -> bool

Check if this is a MatchNoneConstraint.

fn set_pretty_string(&mut self, pretty: String)

Set a custom pretty string (for preserving user input).

fn pretty_string(&self) -> String

Get a human-readable representation.

fn is_match_all(&self) -> bool

Check if this is a MatchAllConstraint.

fn as_single(&self) -> Option<&SingleConstraint>

Try to downcast to SingleConstraint.

fn as_multi(&self) -> Option<&MultiConstraint>

Try to downcast to MultiConstraint.

impl Debug for MatchNoneConstraint

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

Formats the value using the given formatter.

impl Default for MatchNoneConstraint

fn default() -> MatchNoneConstraint

Returns the “default value” for a type.

impl Display for MatchNoneConstraint

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

Formats the value using the given formatter.