Interface Scanner

interface Scanner {
    getStartPos(): number;
    getText(): string;
    getTextPos(): number;
    getToken(): tsc.SyntaxKind;
    getTokenEnd(): number;
    getTokenFullStart(): number;
    getTokenPos(): number;
    getTokenStart(): number;
    getTokenText(): string;
    getTokenValue(): string;
    hasExtendedUnicodeEscape(): boolean;
    hasPrecedingLineBreak(): boolean;
    hasUnicodeEscape(): boolean;
    isIdentifier(): boolean;
    isReservedWord(): boolean;
    isUnterminated(): boolean;
    lookAhead<T>(callback: () => T): T;
    reScanAsteriskEqualsToken(): tsc.SyntaxKind;
    reScanGreaterToken(): tsc.SyntaxKind;
    reScanHashToken(): tsc.SyntaxKind;
    reScanInvalidIdentifier(): tsc.SyntaxKind;
    reScanJsxAttributeValue(): tsc.SyntaxKind;
    reScanJsxToken(allowMultilineJsxText?: boolean): JsxTokenSyntaxKind;
    reScanLessThanToken(): tsc.SyntaxKind;
    reScanQuestionToken(): tsc.SyntaxKind;
    reScanSlashToken(): tsc.SyntaxKind;
    reScanTemplateHeadOrNoSubstitutionTemplate(): tsc.SyntaxKind;
    reScanTemplateToken(isTaggedTemplate: boolean): tsc.SyntaxKind;
    resetTokenState(pos: number): void;
    scan(): tsc.SyntaxKind;
    scanJsDocToken(): JSDocSyntaxKind;
    scanJsxAttributeValue(): tsc.SyntaxKind;
    scanJsxIdentifier(): tsc.SyntaxKind;
    scanJsxToken(): JsxTokenSyntaxKind;
    scanRange<T>(start: number, length: number, callback: () => T): T;
    setJSDocParsingMode(kind: JSDocParsingMode): void;
    setLanguageVariant(variant: tsc.LanguageVariant): void;
    setOnError(onError: ErrorCallback | undefined): void;
    setScriptKind(scriptKind: tsc.ScriptKind): void;
    setScriptTarget(scriptTarget: tsc.ScriptTarget): void;
    setText(text: string | undefined, start?: number, length?: number): void;
    setTextPos(textPos: number): void;
    tryScan<T>(callback: () => T): T;
}