class A() {
  fun plus(<!UNUSED_PARAMETER!>i<!> : Int) {}
  fun minus() {}
   fun contains(<!UNUSED_PARAMETER!>a<!> : Any?) : Boolean = true
}

fun A.div(<!UNUSED_PARAMETER!>i<!> : Int) {}
fun A?.times(<!UNUSED_PARAMETER!>i<!> : Int) {}

fun test(x : Int?, a : A?) {
    x<!UNSAFE_CALL!>.<!>plus(1)
    x?.plus(1)
    x <!UNSAFE_INFIX_CALL!>plus<!> 1
    x <!UNSAFE_INFIX_CALL!>+<!> 1
    <!UNSAFE_CALL!>-<!>x
    x<!UNSAFE_CALL!>.<!>minus()
    x?.minus()

    a<!UNSAFE_CALL!>.<!>plus(1)
    a?.plus(1)
    a <!UNSAFE_INFIX_CALL!>plus<!> 1
    a <!UNSAFE_INFIX_CALL!>+<!> 1
    <!UNSAFE_CALL!>-<!>a
    a<!UNSAFE_CALL!>.<!>minus()
    a?.minus()

    a<!UNSAFE_CALL!>.<!>div(1)
    a <!UNSAFE_INFIX_CALL!>/<!> 1
    a <!UNSAFE_INFIX_CALL!>div<!> 1
    a?.div(1)

    a.times(1)
    a * 1
    a times 1
    a?.times(1)

    1 <!UNSAFE_INFIX_CALL!>in<!> a
    a <!UNSAFE_INFIX_CALL!>contains<!> 1
    a<!UNSAFE_CALL!>.<!>contains(1)
    a?.contains(1)
}