Struct Arm 

pub struct Arm {
    pub pat: Pat,
    pub body: Expr,
    pub guard: Option<Guard>,
    pub meta: Metadata,
}

A pattern matching arm with metadata.

Fields

pat: Pat

The pattern of the arm.

body: Expr

The body of the arm.

guard: Option<Guard>

The optional guard of the arm.

meta: Metadata

Source span and attributes.

Implementations

impl Arm

pub fn non_guarded(pat: Pat, body: Expr, span: Span) -> Self

Create a non-guarded arm

Trait Implementations

impl AnyFragment for Arm

fn type_id() -> FragmentTypeId

Get a type identifier for this fragment.

fn as_fragment<'a>(&'a self, type_id: FragmentTypeId) -> Option<FragmentRef<'a>>

Coerce as a fragment reference.

fn as_owned_fragment(&self, type_id: FragmentTypeId) -> Option<Fragment>

Coerce as an owned fragment.

impl AstVisitable for Arm

fn drive_map<V: AstVisitorMut>(&mut self, v: &mut V)

Recursively visit this type with the provided visitor. This calls the visitor’s visit_$any method if it exists, otherwise visit_inner.

fn drive<V: AstVisitor>(&self, v: &mut V)

Recursively visit this type with the provided visitor. This calls the visitor’s visit_$any method if it exists, otherwise visit_inner.

impl AstVisitable for Arm

fn drive<V: AstEarlyExitVisitor>(&self, v: &mut V) -> ControlFlow<V::Break>

Recursively visit this type with the provided visitor. This calls the visitor’s visit_$any method if it exists, otherwise visit_inner.

fn drive_mut<V: AstEarlyExitVisitorMut>( &mut self, v: &mut V, ) -> ControlFlow<V::Break>

Recursively visit this type with the provided visitor. This calls the visitor’s visit_$any method if it exists, otherwise visit_inner.

impl Clone for Arm

fn clone(&self) -> Arm

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Arm

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Arm

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<'s, V> Drive<'s, V> for Arm

where V: Visitor + Visit<'s, Pat> + Visit<'s, Expr> + Visit<'s, Option<Guard>> + Visit<'s, Metadata>,

fn drive_inner(&'s self, visitor: &mut V) -> ControlFlow<V::Break>

Call v.visit() on the immediate contents of self.

impl<'s, V> DriveMut<'s, V> for Arm

where V: Visitor + VisitMut<'s, Pat> + VisitMut<'s, Expr> + VisitMut<'s, Option<Guard>> + VisitMut<'s, Metadata>,

fn drive_inner_mut(&'s mut self, visitor: &mut V) -> ControlFlow<V::Break>

Call v.visit() on the immediate contents of self.

impl Eq for Arm

impl<'lt> From<&'lt Arm> for FragmentRef<'lt>

fn from(fragment: &'lt Arm) -> Self

Converts to this type from the input type.

impl From<Arm> for Fragment

fn from(fragment: Arm) -> Self

Converts to this type from the input type.

impl HasMetadata for Arm

fn metadata(&self) -> &Metadata

Get metadata

fn metadata_mut(&mut self) -> &mut Metadata

Get mutable borrow on metadata

impl Hash for Arm

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 JsonSchema for Arm

fn schema_name() -> String

The name of the generated JSON Schema.

fn schema_id() -> Cow<'static, str>

Returns a string that uniquely identifies the schema produced by this type.

fn json_schema(generator: &mut SchemaGenerator) -> Schema

Generates a JSON Schema for this type.

fn is_referenceable() -> bool

Whether JSON Schemas generated for this type should be re-used where possible using the $ref keyword.

impl Ord for Arm

fn cmp(&self, other: &Arm) -> 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 Arm

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for Arm

fn partial_cmp(&self, other: &Arm) -> 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 Serialize for Arm

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 Arm

impl<A: 'static + Clone, P: PrettyAst<A>> ToDocument<P, A> for Arm

fn to_document(&self, printer: &P) -> DocBuilder<A>

Produce a document using the provided printer reference.