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// See comment in BCodeBodyBuilder
// -target:jvm-1.5 -Ybackend:GenBCode -Yopt:l:none
// target disables stack map frame generation. in this mode, the ClssWriter just emits dead code as is.
class C {
// can't just emit a call to ???, that returns value of type Nothing$ (not Int).
def f1: Int = ???
def f2: Int = throw new Error("")
def f3(x: Boolean) = {
var y = 0
// cannot assign an object of type Nothing$ to Int
if (x) y = ???
else y = 1
y
}
def f4(x: Boolean) = {
var y = 0
// tests that whatever is emitted after the throw is valid (what? depends on opts, presence of stack map frames)
if (x) y = throw new Error("")
else y = 1
y
}
def f5(x: Boolean) = {
// stack heights need to be the same. ??? looks to the jvm like returning a value of
// type Nothing$, need to drop or throw it.
println(
if (x) { ???; 10 }
else 20
)
}
def f6(x: Boolean) = {
println(
if (x) { throw new Error(""); 10 }
else 20
)
}
def f7(x: Boolean) = {
println(
if (x) throw new Error("")
else 20
)
}
def f8(x: Boolean) = {
println(
if (x) throw new Error("")
else 20
)
}
}
object Test extends App {
new C()
}
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