pub enum Pattern {
    BindPattern(TypeIdVarIdBox<Pattern>),
    Var(TypeIdVarId),
    ConstInt(TypeIdi64),
    ConstPrim(TypeIdSym),
    Term(TypeIdTermIdVec<Pattern>),
    Wildcard(TypeId),
    And(TypeIdVec<Pattern>),
}
Expand description

A left-hand side pattern of some rule.

Variants

BindPattern(TypeIdVarIdBox<Pattern>)

Bind a variable of the given type from the current value.

Keep matching on the value with the subpattern.

Var(TypeIdVarId)

Match the current value against an already bound variable with the given type.

ConstInt(TypeIdi64)

Match the current value against a constant integer of the given integer type.

ConstPrim(TypeIdSym)

Match the current value against a constant primitive value of the given primitive type.

Term(TypeIdTermIdVec<Pattern>)

Match the current value against the given extractor term with the given arguments.

Wildcard(TypeId)

Match anything of the given type successfully.

And(TypeIdVec<Pattern>)

Match all of the following patterns of the given type.

Implementations

Get this pattern’s type.

Get the root term of this pattern, if any.

Trait Implementations

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

Formats the value using the given formatter. Read more

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

This method tests for !=.

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

The resulting type after obtaining ownership.

Creates owned data from borrowed data, usually by cloning. Read more

Uses borrowed data to replace owned data, usually by cloning. Read more

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.