import type { SourceLocation } from "../types/base.js";
export type SourceMapLocation = {
    line: number;
    col: number;
};
export type SourceMap = Record<string, Record<string, SourceMapLocation>>;
export declare class SourceMapBuilder {
    private currentKey;
    /** How many leading ids of the builder's step path belong to the scopes
     *  above the current one. A block helper (a fork body, a block argument)
     *  runs under a runner of its own, whose step paths start at 0, so its
     *  records drop the path of the statement that holds the block: the
     *  first statement of a fork body at builder path `[2, 0]` is step `0`
     *  at run time. */
    private base;
    private enclosing;
    private map;
    /** Enter a function or node scope, whose step paths start at the root. */
    enterScope(moduleId: string, scopeName: string): void;
    /** Enter a block scope inside the current one. `base` is the length of
     *  the builder's step path at the block, the part its records drop. */
    enterBlockScope(moduleId: string, scopeName: string, base: number): void;
    /** Return to the scope that holds the block. */
    exitBlockScope(): void;
    record(subStepPath: number[], loc: SourceLocation | undefined): void;
    build(): SourceMap;
}