==== tests/cases/compiler/assignToEnum.ts (4 errors) ====
    enum A { foo, bar }
    A = undefined;  // invalid LHS
    ~
!!! Invalid left-hand side of assignment expression.
    A = A.bar;      // invalid LHS
    ~
!!! Invalid left-hand side of assignment expression.
    A.foo = 1;      // invalid LHS
    ~~~~~
!!! Invalid left-hand side of assignment expression.
    A.foo = A.bar;  // invalid LHS
    ~~~~~
!!! Invalid left-hand side of assignment expression.