import { ObjectValue, ThrowCompletion } from '../index.mts';
import type { ErrorObject } from '../intrinsics/Error.mts';
import { Token } from './tokens.mts';
import type { Location, Position } from './ParseNode.mts';
export type Locatable = TokenData | Position | Location | {
    readonly location: Location;
};
export declare const isDecimalDigit: (c: string) => "" | boolean;
export declare const isHexDigit: (c: string) => "" | boolean;
export declare const isWhitespace: (c: string) => "" | boolean;
export declare const isLineTerminator: (c: string | number) => boolean;
export declare const isIdentifierStart: (c: string) => "" | boolean;
export declare const isIdentifierPart: (c: string) => "" | boolean;
export declare class TokenData {
    readonly type: Token;
    readonly startIndex: number;
    readonly endIndex: number;
    readonly line: number;
    readonly column: number;
    readonly hadLineTerminatorBefore: boolean;
    readonly name: string;
    readonly value: string | number | bigint | boolean | null;
    readonly escaped: boolean;
    constructor({ type, startIndex, endIndex, line, column, hadLineTerminatorBefore, name, value, escaped }: Pick<TokenData, 'type' | 'startIndex' | 'endIndex' | 'line' | 'column' | 'hadLineTerminatorBefore' | 'name' | 'value' | 'escaped'>);
    valueAsString(): string;
    valueAsNumeric(): number | bigint;
    valueAsBoolean(): boolean;
}
export declare abstract class Lexer {
    protected abstract readonly source: string;
    protected abstract readonly decoratingSource?: string;
    protected currentToken: TokenData;
    protected peekToken: TokenData;
    protected peekAheadToken: TokenData | undefined;
    protected position: number;
    protected get debug(): string;
    protected line: number;
    protected columnOffset: number;
    protected scannedValue: string | number | Token | bigint | boolean;
    protected lineTerminatorBeforeNextToken: boolean;
    protected positionForNextToken: number;
    protected lineForNextToken: number;
    protected columnForNextToken: number;
    protected escapeIndex: number;
    protected abstract readonly specifier?: string;
    earlyErrors: Set<ErrorObject>;
    decorateSyntaxError(error: Pick<ErrorObject, 'HostDefinedMessageString' | 'HostDefinedStack'>, location: number | Locatable): void;
    static decorateSyntaxErrorWithScriptId(error: ObjectValue, scriptId: string | undefined): void;
    addEarlyError({ Value: error }: ThrowCompletion, location?: Locatable): ErrorObject;
    abstract isStrictMode(): boolean;
    raise(error: ThrowCompletion, context?: number | Locatable): never;
    unexpected(location?: number | Locatable): never;
    advance(): TokenData;
    next(): TokenData;
    peek(): TokenData;
    peekAhead(): TokenData;
    matches(token: string | Token, peek: TokenData): boolean;
    test(token: string | Token): boolean;
    testAhead(token: string | Token): boolean;
    eat(token: string | Token): boolean;
    expect(token: string | Token): TokenData;
    skipSpace(): void;
    skipHashbangComment(): void;
    skipLineComment(): void;
    skipBlockComment(): void;
    nextToken(): 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | 60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 | 81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 90 | 91 | 92 | 93 | 94 | 95 | 96 | 97 | 98 | 99 | 100 | 101 | 102 | 103;
    scanNumber(): 88 | 90;
    scanString(char: string): 89;
    scanEscapeSequence(): string;
    scanCodePoint(): number;
    scanHex(length: number): number;
    scanIdentifierOrKeyword(isPrivate?: boolean): 49 | 50 | 51 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 | 81 | 82 | 83 | 84 | 85 | 86 | 87 | 91 | 92 | 93 | 94 | 95 | 96 | 97 | 98 | 99 | 100 | 102 | 103;
    scanRegularExpressionBody(): void;
    scanRegularExpressionFlags(): void;
}
//# sourceMappingURL=Lexer.d.mts.map