import * as AST from "./ast.js";
/**
 * A read-only visitor.
 *
 * Subclasses can be used to gather information from an AST.
 *
 * To handle specific node types add methods like `visitPattern`.
 * Then, to descend into children call `genericVisit`.
 *
 * Visiting methods must implement the following interface:
 *
 * ```ts
 * interface VisitingMethod {
 *     (this: Visitor, node: AST.BaseNode): void;
 * }
 * ```
 */
export declare abstract class Visitor {
    [prop: string]: unknown;
    visit(node: AST.BaseNode): void;
    genericVisit(node: AST.BaseNode): void;
    visitResource?(node: AST.Resource): void;
    visitMessage?(node: AST.Message): void;
    visitTerm?(node: AST.Term): void;
    visitPattern?(node: AST.Pattern): void;
    visitTextElement?(node: AST.TextElement): void;
    visitPlaceable?(node: AST.Placeable): void;
    visitStringLiteral?(node: AST.StringLiteral): void;
    visitNumberLiteral?(node: AST.NumberLiteral): void;
    visitMessageReference?(node: AST.MessageReference): void;
    visitTermReference?(node: AST.TermReference): void;
    visitVariableReference?(node: AST.VariableReference): void;
    visitFunctionReference?(node: AST.FunctionReference): void;
    visitSelectExpression?(node: AST.SelectExpression): void;
    visitCallArguments?(node: AST.CallArguments): void;
    visitAttribute?(node: AST.Attribute): void;
    visitVariant?(node: AST.Variant): void;
    visitNamedArgument?(node: AST.NamedArgument): void;
    visitIdentifier?(node: AST.Identifier): void;
    visitComment?(node: AST.Comment): void;
    visitGroupComment?(node: AST.GroupComment): void;
    visitResourceComment?(node: AST.ResourceComment): void;
    visitJunk?(node: AST.Junk): void;
    visitSpan?(node: AST.Span): void;
    visitAnnotation?(node: AST.Annotation): void;
}
/**
 * A read-and-write visitor.
 *
 * Subclasses can be used to modify an AST in-place.
 *
 * To handle specific node types add methods like `visitPattern`.
 * Then, to descend into children call `genericVisit`.
 *
 * Visiting methods must implement the following interface:
 *
 * ```ts
 * interface TransformingMethod {
 *     (this: Transformer, node: AST.BaseNode): AST.BaseNode | undefined;
 * }
 * ```
 *
 * The returned node will replace the original one in the AST. Return
 * `undefined` to remove the node instead.
 */
export declare abstract class Transformer extends Visitor {
    [prop: string]: unknown;
    visit(node: AST.BaseNode): AST.BaseNode | undefined;
    genericVisit(node: AST.BaseNode): AST.BaseNode;
    visitResource?(node: AST.Resource): AST.BaseNode | undefined;
    visitMessage?(node: AST.Message): AST.BaseNode | undefined;
    visitTerm?(node: AST.Term): AST.BaseNode | undefined;
    visitPattern?(node: AST.Pattern): AST.BaseNode | undefined;
    visitTextElement?(node: AST.TextElement): AST.BaseNode | undefined;
    visitPlaceable?(node: AST.Placeable): AST.BaseNode | undefined;
    visitStringLiteral?(node: AST.StringLiteral): AST.BaseNode | undefined;
    visitNumberLiteral?(node: AST.NumberLiteral): AST.BaseNode | undefined;
    visitMessageReference?(node: AST.MessageReference): AST.BaseNode | undefined;
    visitTermReference?(node: AST.TermReference): AST.BaseNode | undefined;
    visitVariableReference?(node: AST.VariableReference): AST.BaseNode | undefined;
    visitFunctionReference?(node: AST.FunctionReference): AST.BaseNode | undefined;
    visitSelectExpression?(node: AST.SelectExpression): AST.BaseNode | undefined;
    visitCallArguments?(node: AST.CallArguments): AST.BaseNode | undefined;
    visitAttribute?(node: AST.Attribute): AST.BaseNode | undefined;
    visitVariant?(node: AST.Variant): AST.BaseNode | undefined;
    visitNamedArgument?(node: AST.NamedArgument): AST.BaseNode | undefined;
    visitIdentifier?(node: AST.Identifier): AST.BaseNode | undefined;
    visitComment?(node: AST.Comment): AST.BaseNode | undefined;
    visitGroupComment?(node: AST.GroupComment): AST.BaseNode | undefined;
    visitResourceComment?(node: AST.ResourceComment): AST.BaseNode | undefined;
    visitJunk?(node: AST.Junk): AST.BaseNode | undefined;
    visitSpan?(node: AST.Span): AST.BaseNode | undefined;
    visitAnnotation?(node: AST.Annotation): AST.BaseNode | undefined;
}