/**
 * The recursive-descent reader for a `keyframes:` block's own indented source:
 * the stop labels, their ascending order, and the direct properties each stop
 * holds.
 */
import type { Diagnostic } from "@velarscript/compiler";
import type { Expression } from "@velarscript/compiler/extension";
import { type WebKeyframeStop } from "../ast.ts";
import type { WebKeyframesBlockSyntax } from "../lexer.ts";
export declare class KeyframesSourceParser {
    private readonly lines;
    private readonly blockSpan;
    private readonly parseExpression;
    private readonly report;
    private readonly seenOffsets;
    private index;
    private previousGroupStart;
    constructor(block: WebKeyframesBlockSyntax, parseExpression: (text: string, offset: number, openingIndent?: string) => Expression, report: (item: Diagnostic) => void);
    parse(): readonly WebKeyframeStop[];
    private parseOffsets;
    private parseEntries;
    private lineSpan;
}
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