==== tests/cases/compiler/arrayAssignmentTest1.ts (19 errors) ==== interface I1 { IM1():void[]; } class C1 implements I1 { IM1():void[] {return null;} C1M1():C1[] {return null;} } class C2 extends C1 { C2M1():C2[] { return null;} } class C3 { CM3M1() { return 3;} } /* This behaves unexpectedly with the following types: Type 1 of any[]: * Type 2 of the following throws an error but shouldn't: () => void[], SomeClass[], and {one: 1}[]. * Type 2 of the following doesn't throw an error but should: {one: 1}, new() => SomeClass, SomeClass. */ var a1 : any = null; var c1 : C1 = new C1(); var i1 : I1 = c1; var c2 : C2 = new C2(); var c3 : C3 = new C3(); var o1 = {one : 1}; var f1 = function () { return new C1();} var arr_any: any[] = []; var arr_i1: I1[] = []; var arr_c1: C1[] = []; var arr_c2: C2[] = []; var arr_i1_2: I1[] = []; var arr_c1_2: C1[] = []; var arr_c2_2: C2[] = []; var arr_c3: C3[] = []; var i1_error: I1 = []; // should be an error - is ~~~~~~~~ !!! Type 'undefined[]' is not assignable to type 'I1': !!! Property 'IM1' is missing in type 'undefined[]'. var c1_error: C1 = []; // should be an error - is ~~~~~~~~ !!! Type 'undefined[]' is not assignable to type 'C1': !!! Property 'IM1' is missing in type 'undefined[]'. var c2_error: C2 = []; // should be an error - is ~~~~~~~~ !!! Type 'undefined[]' is not assignable to type 'C2': !!! Property 'C2M1' is missing in type 'undefined[]'. var c3_error: C3 = []; // should be an error - is ~~~~~~~~ !!! Type 'undefined[]' is not assignable to type 'C3': !!! Property 'CM3M1' is missing in type 'undefined[]'. arr_any = arr_i1; // should be ok - is arr_any = arr_c1; // should be ok - is arr_any = arr_c2; // should be ok - is arr_any = arr_c3; // should be ok - is arr_i1 = arr_i1; // should be ok - subtype relationship - is arr_i1 = arr_c1; // should be ok - subtype relationship - is arr_i1 = arr_c2; // should be ok - subtype relationship - is arr_i1 = arr_c3; // should be an error - is ~~~~~~ !!! Type 'C3[]' is not assignable to type 'I1[]': !!! Type 'C3' is not assignable to type 'I1': !!! Property 'IM1' is missing in type 'C3'. arr_c1 = arr_c1; // should be ok - subtype relationship - is arr_c1 = arr_c2; // should be ok - subtype relationship - is arr_c1 = arr_i1; // should be an error - is ~~~~~~ !!! Type 'I1[]' is not assignable to type 'C1[]': !!! Type 'I1' is not assignable to type 'C1': !!! Property 'C1M1' is missing in type 'I1'. arr_c1 = arr_c3; // should be an error - is ~~~~~~ !!! Type 'C3[]' is not assignable to type 'C1[]': !!! Type 'C3' is not assignable to type 'C1': !!! Property 'IM1' is missing in type 'C3'. arr_c2 = arr_c2; // should be ok - subtype relationship - is arr_c2 = arr_c1; // should be an error - subtype relationship - is ~~~~~~ !!! Type 'C1[]' is not assignable to type 'C2[]': !!! Type 'C1' is not assignable to type 'C2': !!! Property 'C2M1' is missing in type 'C1'. arr_c2 = arr_i1; // should be an error - subtype relationship - is ~~~~~~ !!! Type 'I1[]' is not assignable to type 'C2[]': !!! Type 'I1' is not assignable to type 'C2': !!! Property 'C2M1' is missing in type 'I1'. arr_c2 = arr_c3; // should be an error - is ~~~~~~ !!! Type 'C3[]' is not assignable to type 'C2[]': !!! Type 'C3' is not assignable to type 'C2': !!! Property 'C2M1' is missing in type 'C3'. // "clean up bug" occurs at this point // if you move these three expressions to another file, they raise an error // something to do with state from the above propagating forward? arr_c3 = arr_c2_2; // should be an error - is ~~~~~~ !!! Type 'C2[]' is not assignable to type 'C3[]': !!! Type 'C2' is not assignable to type 'C3': !!! Property 'CM3M1' is missing in type 'C2'. arr_c3 = arr_c1_2; // should be an error - is ~~~~~~ !!! Type 'C1[]' is not assignable to type 'C3[]': !!! Type 'C1' is not assignable to type 'C3': !!! Property 'CM3M1' is missing in type 'C1'. arr_c3 = arr_i1_2; // should be an error - is ~~~~~~ !!! Type 'I1[]' is not assignable to type 'C3[]': !!! Type 'I1' is not assignable to type 'C3': !!! Property 'CM3M1' is missing in type 'I1'. arr_any = f1; // should be an error - is ~~~~~~~ !!! Type '() => C1' is not assignable to type 'any[]': !!! Property 'push' is missing in type '() => C1'. arr_any = o1; // should be an error - is ~~~~~~~ !!! Type '{ one: number; }' is not assignable to type 'any[]': !!! Property 'length' is missing in type '{ one: number; }'. arr_any = a1; // should be ok - is arr_any = c1; // should be an error - is ~~~~~~~ !!! Type 'C1' is not assignable to type 'any[]': !!! Property 'length' is missing in type 'C1'. arr_any = c2; // should be an error - is ~~~~~~~ !!! Type 'C2' is not assignable to type 'any[]': !!! Property 'length' is missing in type 'C2'. arr_any = c3; // should be an error - is ~~~~~~~ !!! Type 'C3' is not assignable to type 'any[]': !!! Property 'length' is missing in type 'C3'. arr_any = i1; // should be an error - is ~~~~~~~ !!! Type 'I1' is not assignable to type 'any[]': !!! Property 'length' is missing in type 'I1'.