Enum regex_syntax::ast::visitor::ClassFrame

enum ClassFrame<'a> {
    Union {
        head: &'a ClassSetItem,
        tail: &'a [ClassSetItem],
    },
    Binary {
        op: &'a ClassSetBinaryOp,
    },
    BinaryLHS {
        op: &'a ClassSetBinaryOp,
        lhs: &'a ClassSet,
        rhs: &'a ClassSet,
    },
    BinaryRHS {
        op: &'a ClassSetBinaryOp,
        rhs: &'a ClassSet,
    },
}

Represents a single stack frame while performing structural induction over a character class.

Variants

Union

The stack frame used while visiting every child node of a union of character class items.

Fields

head: &'a ClassSetItem

The child node we are currently visiting.

tail: &'a [ClassSetItem]

The remaining child nodes to visit (which may be empty).

Binary

The stack frame used while a binary class operation.

Fields

op: &'a ClassSetBinaryOp

BinaryLHS

A stack frame allocated just before descending into a binary operator’s left hand child node.

Fields

op: &'a ClassSetBinaryOp

lhs: &'a ClassSet

rhs: &'a ClassSet

BinaryRHS

A stack frame allocated just before descending into a binary operator’s right hand child node.

Fields

op: &'a ClassSetBinaryOp

rhs: &'a ClassSet

Implementations

impl<'a> ClassFrame<'a>

fn child(&self) -> ClassInduct<'a>

Perform the next inductive step on this frame and return the next child class node to visit.

Trait Implementations

impl<'a> Debug for ClassFrame<'a>

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

Formats the value using the given formatter.