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object Test extends App {
def a1(): Unit = println(" a1")
def a2(): Unit = println(" a2")
def a3(): Unit = println(" a3")
def i1: Int = { println(" i1"); 1 }
def i2: Int = { println(" i2"); 2 }
def i3: Int = { println(" i3"); 3 }
def e1: Int = { println(" e1"); throw new Exception() }
def t1: Int = {
println("t1")
try {
synchronized { return i1 }
} finally {
synchronized { a1() }
}
}
def t2: Int = {
println("t2")
try {
try { return i1 }
finally { a1() }
} finally {
try { a2() }
finally { a3() }
}
}
def t3(i: => Int): Int = {
println("t3")
try {
try { return i }
finally { a1() }
} catch {
case _: Throwable =>
try { i2 }
finally { a2() } // no cleanup version
} finally {
a3()
}
}
def t4(i: => Int): Int = {
println("t4")
try {
return i
} finally {
return i2
}
}
def t5(i: => Int): Int = {
println("t5")
try {
try {
try { return i }
finally { a1() }
} catch {
case _: Throwable => i2
}
} finally {
a3()
}
}
def t6(i: => Int): Int = {
println("t6")
try {
try { return i }
finally { return i2 }
} finally {
return i3
}
}
def t7(i: => Int): Int = {
println("t7")
try { i }
catch {
case _: Throwable =>
return i2
} finally {
a1() // cleanup required, early return in handler
}
}
def t8(i: => Int): Int = {
println("t8")
try {
try { i }
finally { // no cleanup version
try { return i2 }
finally { a1() } // cleanup version required
}
} finally { // cleanup version required
a2()
}
}
def t9(i: => Int): Int = {
println("t9")
try {
return i
} finally {
try { return i2 }
finally { a1() }
}
}
def t10(i: => Int): Int = {
println("t10")
try {
return i
} finally {
try { return i2 }
finally { return i3 }
}
}
// this changed semantics between 2.12.0 and 2.12.1, see https://github.com/scala/scala/pull/5509#issuecomment-259291609
def t11(i: => Int): Int = {
println("t11")
try {
try { return i }
finally { return i2 }
} finally {
a1()
}
}
assert(t1 == 1)
assert(t2 == 1)
assert(t3(i1) == 1)
assert(t3(e1) == 2)
assert(t4(i1) == 2)
assert(t4(e1) == 2)
assert(t5(i1) == 1)
assert(t5(e1) == 2)
assert(t6(i1) == 3)
assert(t6(e1) == 3)
assert(t7(i1) == 1)
assert(t7(e1) == 2)
assert(t8(i1) == 2)
assert(t8(e1) == 2)
assert(t9(i1) == 2)
assert(t9(e1) == 2)
assert(t10(i1) == 3)
assert(t10(e1) == 3)
assert(t11(i1) == 2)
assert(t11(e1) == 2)
}
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