tests/cases/compiler/ClassDeclaration25.ts(6,5): error TS2391: Function implementation is missing or not immediately following the declaration.
tests/cases/compiler/ClassDeclaration25.ts(7,5): error TS2391: Function implementation is missing or not immediately following the declaration.


==== tests/cases/compiler/ClassDeclaration25.ts (2 errors) ====
    interface IList<T> {
        data(): T;
        next(): string;
    }
    class List<U> implements IList<U> {
        data(): U;
        ~~~~
!!! error TS2391: Function implementation is missing or not immediately following the declaration.
        next(): string;
        ~~~~
!!! error TS2391: Function implementation is missing or not immediately following the declaration.
    }