Enum Pattern 

pub enum Pattern<T, X> {
    Ground(T),
    Var(X),
}

Resource or variable.

Used as a triple/quad component to represent either a fixed (Ground) resource, or a Variable that may be substituted for any resource.

Variants

Ground(T)

Ground (fixed) resource.

Var(X)

Variable, matching any resource.

Implementations

impl<T, X> Pattern<T, X>

pub fn as_ref(&self) -> Pattern<&T, &X>

Borrows the ground value or variable of this pattern.

pub fn as_deref(&self) -> Pattern<&T::Target, &X::Target>

where T: Deref, X: Deref,

Dereferences the ground value or variable of this pattern.

pub fn is_ground(&self) -> bool

Checks if this pattern is a ground value (as opposed to a variable).

pub fn is_ground_and(&self, f: impl FnOnce(&T) -> bool) -> bool

Returns true if this pattern is a ground value satisfying the given predicate, and false if it is a variable.

pub fn is_var(&self) -> bool

Checks if this pattern is a variable (as opposed to a ground value).

pub fn is_var_and(&self, f: impl FnOnce(&X) -> bool) -> bool

Returns true if this pattern is a variable satisfying the given predicate, and false if it is a ground value.

pub fn is_ground_or(&self, f: impl FnOnce(&X) -> bool) -> bool

Returns true if this pattern is a ground value, or if it is a variable satisfying the given predicate.

Mirrors Option::is_none_or, with Self::Ground playing the role of None.

pub fn is_var_or(&self, f: impl FnOnce(&T) -> bool) -> bool

Returns true if this pattern is a variable, or if it is a ground value satisfying the given predicate.

Mirrors Option::is_none_or, with Self::Var playing the role of None.

pub fn map<U>(self, f: impl FnOnce(T) -> U) -> Pattern<U, X>

Maps the ground value with the given function, leaving a variable untouched.

pub fn map_var<Y>(self, f: impl FnOnce(X) -> Y) -> Pattern<T, Y>

Maps the variable with the given function, leaving a ground value untouched.

Trait Implementations

impl<T, X> AsPattern for Pattern<T, X>

type Ground = T

Ground value type.

type Var = X

Variable type.

fn as_pattern(&self) -> Pattern<&T, &X>

Borrows this value as a Pattern.

fn is_ground(&self) -> bool

Checks if this value is a ground value (as opposed to a variable).

fn is_ground_and(&self, f: impl FnOnce(&Self::Ground) -> bool) -> bool

Returns true if this value is a ground value satisfying the given predicate, and false if it is a variable.

fn is_var(&self) -> bool

Checks if this value is a variable (as opposed to a ground value).

fn is_var_and(&self, f: impl FnOnce(&Self::Var) -> bool) -> bool

Returns true if this value is a variable satisfying the given predicate, and false if it is a ground value.

fn is_ground_or(&self, f: impl FnOnce(&Self::Var) -> bool) -> bool

Returns true if this value is a ground value, or if it is a variable satisfying the given predicate.

fn is_var_or(&self, f: impl FnOnce(&Self::Ground) -> bool) -> bool

Returns true if this value is a variable, or if it is a ground value satisfying the given predicate.

impl<T: Clone, X: Clone> Clone for Pattern<T, X>

fn clone(&self) -> Pattern<T, X>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Copy, X: Copy> Copy for Pattern<T, X>

impl<T: Debug, X: Debug> Debug for Pattern<T, X>

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

Formats the value using the given formatter.

impl<T: Eq, X: Eq> Eq for Pattern<T, X>

impl<T, X> From<T> for Pattern<T, X>

fn from(value: T) -> Self

Creates a ground pattern from a resource.

impl<T: Hash, X: Hash> Hash for Pattern<T, X>

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<T, X> IntoOwned for Pattern<T, X>

where T: IntoOwned, X: IntoOwned,

type Owned = Pattern<<T as IntoOwned>::Owned, <X as IntoOwned>::Owned>

The fully owned type produced by into_owned.

fn into_owned(self) -> Self::Owned

Converts self into a fully owned value, consuming it.

impl<T: Ord, X: Ord> Ord for Pattern<T, X>

fn cmp(&self, other: &Pattern<T, X>) -> 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<T: PartialEq, X: PartialEq> PartialEq for Pattern<T, X>

fn eq(&self, other: &Pattern<T, X>) -> 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<T: PartialOrd, X: PartialOrd> PartialOrd for Pattern<T, X>

fn partial_cmp(&self, other: &Pattern<T, X>) -> 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<T: PartialEq, X: PartialEq> StructuralPartialEq for Pattern<T, X>