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compoundAdditionAssignmentLHSCannotBeAssigned.ts(5,1): error TS2322: Type 'string' is not assignable to type 'boolean'.
compoundAdditionAssignmentLHSCannotBeAssigned.ts(8,1): error TS2322: Type 'string' is not assignable to type 'number'.
compoundAdditionAssignmentLHSCannotBeAssigned.ts(11,1): error TS2322: Type 'string' is not assignable to type 'E'.
compoundAdditionAssignmentLHSCannotBeAssigned.ts(14,1): error TS2322: Type 'string' is not assignable to type '{ a: string; }'.
compoundAdditionAssignmentLHSCannotBeAssigned.ts(17,1): error TS2322: Type 'string' is not assignable to type 'void'.
==== compoundAdditionAssignmentLHSCannotBeAssigned.ts (5 errors) ====
// string can add every type, and result string cannot be assigned to below types
enum E { a, b, c }
var x1: boolean;
x1 += '';
~~
!!! error TS2322: Type 'string' is not assignable to type 'boolean'.
var x2: number;
x2 += '';
~~
!!! error TS2322: Type 'string' is not assignable to type 'number'.
var x3: E;
x3 += '';
~~
!!! error TS2322: Type 'string' is not assignable to type 'E'.
var x4: {a: string};
x4 += '';
~~
!!! error TS2322: Type 'string' is not assignable to type '{ a: string; }'.
var x5: void;
x5 += '';
~~
!!! error TS2322: Type 'string' is not assignable to type 'void'.
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