Enum Pattern 

pub enum Pattern {
    Any,
    Op(String),
    BinaryOp {
        op: String,
        left: Box<Pattern>,
        right: Box<Pattern>,
    },
    UnaryOp {
        op: String,
        operand: Box<Pattern>,
    },
    Constant(f64),
    Zero,
    One,
    Variable(String),
    Sequence(Vec<Pattern>),
    Alternative(Vec<Pattern>),
}

Graph pattern for matching.

Variants

Any

Match any node

Op(String)

Match a specific operation

BinaryOp

Match a binary operation with two subpatterns

Fields

op: String

left: Box<Pattern>

right: Box<Pattern>

UnaryOp

Match a unary operation with one subpattern

Fields

op: String

operand: Box<Pattern>

Constant(f64)

Match a constant value

Zero

Match zero

One

Match one

Variable(String)

Match a variable (captures the matched node)

Sequence(Vec<Pattern>)

Match a sequence of operations

Alternative(Vec<Pattern>)

Match any of the given patterns

Implementations

impl Pattern

pub fn any() -> Self

Create a pattern matching any node.

pub fn op(name: impl Into<String>) -> Self

Create a pattern matching a specific operation.

pub fn binary_op(op: impl Into<String>, left: Pattern, right: Pattern) -> Self

Create a pattern matching a binary operation.

pub fn unary_op(op: impl Into<String>, operand: Pattern) -> Self

Create a pattern matching a unary operation.

pub fn constant(value: f64) -> Self

Create a pattern matching a constant.

pub fn zero() -> Self

Create a pattern matching zero.

pub fn one() -> Self

Create a pattern matching one.

pub fn variable(name: impl Into<String>) -> Self

Create a pattern matching a variable.

Trait Implementations

impl Clone for Pattern

fn clone(&self) -> Pattern

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Pattern

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Pattern

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for Pattern

fn eq(&self, other: &Pattern) -> 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 Serialize for Pattern

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Pattern