Enum Precedence 

pub enum Precedence {
    Pipe,
    Ternary,
    LogicalOr,
    LogicalAnd,
    Equality,
    Comparison,
    NilCoalescing,
    Range,
    Additive,
    Multiplicative,
    Prefix,
    Exponent,
    Postfix,
}

Expression precedence groups, loosest first. The derived ordering is the binding order of OperatorGrammar::CURRENT.

Variants

Pipe

a |> f

Ternary

c ? a : b

LogicalOr

LogicalAnd

Equality

Comparison

<, >, <=, >=, in, not in

NilCoalescing

??

Range

a..b, a..=b

Additive

Multiplicative

Prefix

!x, -x

Exponent

a ** b

Postfix

Calls, member access, subscripts, postfix ?/!, and every primary.

Implementations

impl Precedence

pub const ALL: [Precedence; 13]

pub const fn name(self) -> &'static str

Stable group name used by the spec table and the tree-sitter PREC constants.

pub const fn associativity(self) -> Associativity

pub const fn description(self) -> &'static str

What the group is, for the spec’s precedence table.

pub const fn spellings(self) -> &'static [&'static str]

Source spellings of the operators in this group, for documentation.

pub fn level(self) -> usize

One-based binding strength in the current grammar (1 = loosest).

pub fn of_node(node: &Node) -> Precedence

The precedence an AST expression node occupies in the current grammar.

impl Precedence

pub fn tighter(self) -> Option<Precedence>

The next tighter group, if any.

Trait Implementations

impl Clone for Precedence

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Precedence

impl Debug for Precedence

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

Formats the value using the given formatter.

impl Eq for Precedence

impl Hash for Precedence

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 Ord for Precedence

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.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

🔬This is a nightly-only experimental API. (clamp_to)

Restrict a value to a certain range.

impl PartialEq for Precedence

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for Precedence

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 StructuralPartialEq for Precedence