import { TextDocument } from 'vscode-languageserver-textdocument';
import { IndexMapping } from '../types/IndexMapping';
export declare class StringReader {
    string: string;
    cursor: number;
    end: number;
    constructor(string: string, cursor?: number, end?: number);
    get passedString(): string;
    get remainingString(): string;
    clone(): StringReader;
    canRead(length?: number): boolean;
    /**
     * Peeks a character at the current cursor.
     * @param offset The index to offset from cursor. @default 0
     */
    peek(offset?: number): string;
    /**
     * Skips the current character.
     * @param step The step to skip. @default 1
     */
    skip(step?: number): this;
    skipLine(): this;
    read(): string;
    readSpace(): string;
    skipSpace(): this;
    skipWhiteSpace(): this;
    /**
     * @throws {ParsingError} When the value is NaN or have non-number char at the beginning.
     */
    readNumber(): string;
    /**
     * @throws {ParsingError} When the value is float or exceeds the range.
     */
    readInt(): number;
    /**
     * @deprecated
     * @throws When the value is float.
     */
    readLong(): bigint;
    readFloat(): number;
    /**
     * @deprecated
     */
    readDouble(): number;
    /**
     * @param out Stores a mapping from in-string indices to real indices.
     */
    readUnquotedString(out?: {
        mapping: IndexMapping;
    }): string;
    /**
     * @throws {ParsingError} If it's not an legal quoted string.
     * @param out Stores a mapping from in-string indices to real indices.
     * @param isReadingJson Whether to read the whole JSON string, including quotes and escaping characters.
     */
    readQuotedString(out?: {
        mapping: IndexMapping;
    }, looseEscapeCheck?: boolean): string;
    /**
     * @throws {ParsingError}
     * @param terminator Endding quote. Will not be included in the result.
     * @param out Stores a mapping from in-string indices to real indices.
     */
    private readUntilQuote;
    /**
     * @param terminator Endding character. Will not be included in the result.
     */
    readUntilOrEnd(...terminators: string[]): string;
    readLine(): string;
    /**
     * @throws {ParsingError} If it's not an legal quoted string.
     * @param out Stores a mapping from in-string indices to real indices.
     * @param isReadingJson Whether to read the whole JSON string, including quotes and escaping characters.
     */
    readString(out?: {
        mapping: IndexMapping;
    }, looseEscapeCheck?: boolean): string;
    /**
     * @deprecated
     * @throws {ParsingError}
     */
    readBoolean(): boolean;
    /**
     * @throws {ParsingError} (tolerable) When the next char can't match the expected one.
     */
    expect(c: string): this;
    readRemaining(): string;
    lastLine(textDoc: TextDocument): this;
    nextLine(textDoc: TextDocument): this;
    static canInNumber(c: string): boolean;
    static isSpace(c: string): boolean;
    static isWhiteSpace(c: string): boolean;
    static isLineSeparator(c: string): boolean;
    /**
     * Whether the string can be used in unquoted string or not.
     * @param string A string.
     */
    static canInUnquotedString(string: string): boolean;
    static isQuote(c: string): c is '"' | "'";
}