import type { Node } from '@babel/types';
import type { SourceRange } from '../seam/types';
/** Babel plugins enabling the TS + JSX superset the instrumenter also parses. */
export declare const BABEL_PLUGINS: readonly ["typescript", "jsx"];
/**
 * A Babel position is `{ line (1-based), column (0-based) }`; a node carries an
 * optional `loc`. We narrow to the slice the traversals read.
 */
interface BabelLocSlice {
    start: {
        line: number;
        column: number;
    };
    end: {
        line: number;
        column: number;
    };
}
/** A node with the structural fields the traversals inspect. */
export type AnyNode = Node & {
    loc?: BabelLocSlice | null;
    [key: string]: unknown;
};
/**
 * Convert a 1-based Babel `loc` to a 0-based Stryker {@link SourceRange} by
 * subtracting 1 from each line (columns unchanged) — the inverse of the
 * map-builder's `+1` keying. Both `targeting.ts` and `range-align.ts` emit
 * Stryker ranges through this single conversion so they stay byte-aligned.
 */
export declare function toStrykerRange(loc: BabelLocSlice): SourceRange;
/** True for an AST node object (has a string `type`). */
export declare function isNode(value: unknown): value is AnyNode;
/**
 * Yield each direct child node (or node in a child array) of `node`.
 * @yields each direct child AST node, skipping non-node fields (loc/type/extra).
 */
export declare function childNodes(node: AnyNode): Generator<AnyNode>;
export {};