Struct cranelift_isle::ir::PatternSequence

pub struct PatternSequence {
    pub insts: Vec<PatternInst>,
}

A linear sequence of instructions that match on and destructure an argument. A pattern is fallible (may not match). If it does not fail, its result consists of the values produced by the PatternInsts, which may be used by a subsequent Expr.

Fields

insts: Vec<PatternInst>

Instruction sequence for pattern.

InstId indexes into this sequence for Value::Pattern values.

Trait Implementations

impl Clone for PatternSequence

fn clone(&self) -> PatternSequence

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for PatternSequence

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

Formats the value using the given formatter.

impl Default for PatternSequence

fn default() -> PatternSequence

Returns the “default value” for a type.

impl Hash for PatternSequence

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 PartialEq<PatternSequence> for PatternSequence

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PatternVisitor for PatternSequence

type PatternId = Value

The type of subpattern identifiers.

fn add_match_equal(&mut self, a: Value, b: Value, ty: TypeId)

Match if a and b have equal values.

fn add_match_int(&mut self, input: Value, ty: TypeId, int_val: i128)

Match if input is the given integer constant.

fn add_match_prim(&mut self, input: Value, ty: TypeId, val: Sym)

Match if input is the given primitive constant.

fn add_match_variant(
    &mut self,
    input: Value,
    input_ty: TypeId,
    arg_tys: &[TypeId],
    variant: VariantId
) -> Vec<Value>

Match if input is the given enum variant. Returns an identifier for each field within the enum variant. The length of the return list must equal the length of arg_tys.

fn add_extract(
    &mut self,
    input: Value,
    input_ty: TypeId,
    output_tys: Vec<TypeId>,
    term: TermId,
    infallible: bool,
    multi: bool
) -> Vec<Value>

Match if the given external extractor succeeds on input. Returns an identifier for each return value from the external extractor. The length of the return list must equal the length of output_tys.

impl RuleVisitor for PatternSequence

type PatternVisitor = PatternSequence

The type of pattern visitors constructed by RuleVisitor::add_pattern.

type ExprVisitor = ExprSequence

The type of expression visitors constructed by RuleVisitor::add_expr.

type Expr = ReturnExpr

The type returned from RuleVisitor::add_expr, which may be exchanged for a subpattern identifier using RuleVisitor::expr_as_pattern.

fn add_arg(&mut self, index: usize, ty: TypeId) -> Value

Visit one of the arguments to the top-level pattern.

fn add_pattern<F: FnOnce(&mut Self)>(&mut self, visitor: F)

Visit a pattern, used once for the rule’s left-hand side and once for each if-let. You can determine which part of the rule the pattern comes from based on whether the PatternId passed to the first call to this visitor came from add_arg or expr_as_pattern.

fn add_expr<F>(&mut self, visitor: F) -> ReturnExprwhere
    F: FnOnce(&mut ExprSequence) -> VisitedExpr<ExprSequence>,

Visit an expression, used once for each if-let and once for the rule’s right-hand side.

fn expr_as_pattern(&mut self, expr: ReturnExpr) -> Value

Given an expression from RuleVisitor::add_expr, return an identifier that can be used with a pattern visitor in RuleVisitor::add_pattern.

fn pattern_as_expr(&mut self, pattern: Value) -> Value

Given an identifier from the pattern visitor, return an identifier that can be used with the expression visitor.

impl Eq for PatternSequence

impl StructuralEq for PatternSequence

impl StructuralPartialEq for PatternSequence