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object Test extends App {
lazy val w = 10
/** normal test */
def testLazy = {
lazy val t = { Console.println("forced lazy val t"); 42 }
lazy val p = t / 2
lazy val q = { println("forced lazy val q"); 10}
println("q = " + q)
println("p = " + p)
1 + t + t
}
/** test 32 lazy vals, which should spill over multiple byte bitmaps. */
def testLazy32 = {
lazy val t00 = { Console.println("forced lazy val t00"); 0 }
lazy val t01 = { Console.println("forced lazy val t01"); 1 }
lazy val t02 = { Console.println("forced lazy val t02"); 2 }
lazy val t03 = { Console.println("forced lazy val t03"); 3 }
lazy val t04 = { Console.println("forced lazy val t04"); 4 }
lazy val t05 = { Console.println("forced lazy val t05"); 5 }
lazy val t06 = { Console.println("forced lazy val t06"); 6 }
lazy val t07 = { Console.println("forced lazy val t07"); 7 }
lazy val t08 = { Console.println("forced lazy val t08"); 8 }
lazy val t09 = { Console.println("forced lazy val t09"); 9 }
lazy val t10 = { Console.println("forced lazy val t10"); 10 }
lazy val t11 = { Console.println("forced lazy val t11"); 11 }
lazy val t12 = { Console.println("forced lazy val t12"); 12 }
lazy val t13 = { Console.println("forced lazy val t13"); 13 }
lazy val t14 = { Console.println("forced lazy val t14"); 14 }
lazy val t15 = { Console.println("forced lazy val t15"); 15 }
lazy val t16 = { Console.println("forced lazy val t16"); 16 }
lazy val t17 = { Console.println("forced lazy val t17"); 17 }
lazy val t18 = { Console.println("forced lazy val t18"); 18 }
lazy val t19 = { Console.println("forced lazy val t19"); 19 }
lazy val t20 = { Console.println("forced lazy val t20"); 20 }
lazy val t21 = { Console.println("forced lazy val t21"); 21 }
lazy val t22 = { Console.println("forced lazy val t22"); 22 }
lazy val t23 = { Console.println("forced lazy val t23"); 23 }
lazy val t24 = { Console.println("forced lazy val t24"); 24 }
lazy val t25 = { Console.println("forced lazy val t25"); 25 }
lazy val t26 = { Console.println("forced lazy val t26"); 26 }
lazy val t27 = { Console.println("forced lazy val t27"); 27 }
lazy val t28 = { Console.println("forced lazy val t28"); 28 }
lazy val t29 = { Console.println("forced lazy val t29"); 29 }
lazy val t30 = { Console.println("forced lazy val t30"); 30 }
lazy val t31 = { Console.println("forced lazy val t31"); 31 }
val sum = t31 + t30 + t29 + t28 + t27 + t26 + t25 + t24 + t23 +
t22 + t21 + t20 + t19 + t18 + t17 + t16 + t15 + t14 +
t13 + t12 + t11 + t10 + t09 + t08 + t07 + t06 + t05 +
t04 + t03 + t02 + t01 + t00
val sum2 = t31 + t30 + t29 + t28 + t27 + t26 + t25 + t24 + t23 +
t22 + t21 + t20 + t19 + t18 + t17 + t16 + t15 + t14 +
t13 + t12 + t11 + t10 + t09 + t08 + t07 + t06 + t05 +
t04 + t03 + t02 + t01 + t00
val sum3 = t00 + t01 + t02 + t03 + t04 + t05 + t06 + t07 + t08 +
t09 + t10 + t11 + t12 + t13 + t14 + t15 + t16 + t17 +
t18 + t19 + t20 + t21 + t22 + t23 + t24 + t25 + t26 +
t27 + t28 + t29 + t30 + t31
println("Sum is: " + sum)
println("Sum again is: " + sum2)
println("Sum again again is: " + sum3)
}
/** test 8 lazy vals, which should fit one byte bitmap. */
def testLazy8 = {
lazy val t00 = { Console.println("forced lazy val t00"); 0 }
lazy val t01 = { Console.println("forced lazy val t01"); 1 }
lazy val t02 = { Console.println("forced lazy val t02"); 2 }
lazy val t03 = { Console.println("forced lazy val t03"); 3 }
lazy val t04 = { Console.println("forced lazy val t04"); 4 }
lazy val t05 = { Console.println("forced lazy val t05"); 5 }
lazy val t06 = { Console.println("forced lazy val t06"); 6 }
lazy val t07 = { Console.println("forced lazy val t07"); 7 }
val sum = t07 + t06 + t05 + t04 + t03 + t02 + t01 + t00
val sum2 = t07 + t06 + t05 + t04 + t03 + t02 + t01 + t00
val sum3 = t00 + t01 + t02 + t03 + t04 + t05 + t06 + t07
println("Sum is: " + sum)
println("Sum again is: " + sum2)
println("Sum again again is: " + sum3)
}
/** test 9 lazy vals, which should spill over two bitmaps. */
def testLazy9 = {
lazy val t00 = { Console.println("forced lazy val t00"); 0 }
lazy val t01 = { Console.println("forced lazy val t01"); 1 }
lazy val t02 = { Console.println("forced lazy val t02"); 2 }
lazy val t03 = { Console.println("forced lazy val t03"); 3 }
lazy val t04 = { Console.println("forced lazy val t04"); 4 }
lazy val t05 = { Console.println("forced lazy val t05"); 5 }
lazy val t06 = { Console.println("forced lazy val t06"); 6 }
lazy val t07 = { Console.println("forced lazy val t07"); 7 }
lazy val t08 = { Console.println("forced lazy val t08"); 8 }
val sum = t08 + t07 + t06 + t05 + t04 + t03 + t02 + t01 + t00
val sum2 = t08 + t07 + t06 + t05 + t04 + t03 + t02 + t01 + t00
val sum3 = t00 + t01 + t02 + t03 + t04 + t05 + t06 + t07 + t08
println("Sum is: " + sum)
println("Sum again is: " + sum2)
println("Sum again again is: " + sum3)
}
/** test recursive method with lazy vals and a single forced */
def testLazyRec(n: Int): Int = {
lazy val t = { println("forced lazy val t at n = " + n); 42 }
if (n > 0)
testLazyRec(n - 1)
else
t
}
/** test recursive method with lazy vals and all vals forced */
def testLazyRecMany(n: Int): Int = {
lazy val t = { println("forced lazy val t at n = " + n); 42 }
if (n > 0) {
testLazyRecMany(n - 1);
t*t
} else
t
}
def testRecVal {
lazy val twos: List[Int] = 2 :: twos
lazy val ones: Stream[Int] = Stream.cons(1, ones)
println("First 5 elements of ones: " + ones.take(5).toList)
}
// should compile without error
def testMutualRecVal {
lazy val odd: Int = 1 + even
lazy val even: Int = 1 + odd
()
}
def testReturnInLazyVal: Boolean = {
lazy val go = { return false }
go
}
{
lazy val inCtor = "I am initialized when the constructor is run"
inCtor
}
class CtorBlock {
{
lazy val inCtor = {
println("I am initialized when the constructor is run")
42
}
inCtor
}
}
// ticket #1589, should not crash
class Test {
val x = {
lazy val t = "abc";
t
}
}
// see #1589
object NestedLazyVals {
lazy val x = {
lazy val y = { println("forcing y"); 42; }
println("forcing x")
y
}
val x1 = 5 + { lazy val y = 10 ; y }
println(x)
println(x1)
}
trait TNestedLazyVals {
lazy val x = { lazy val y = 42; y }
}
object ONestedLazyVals extends TNestedLazyVals {
println(x)
}
println(testLazy)
testLazy32
testLazy8
testLazy9
println(testLazyRec(5))
println(testLazyRecMany(5))
testRecVal
new CtorBlock
println(testReturnInLazyVal)
NestedLazyVals
ONestedLazyVals
}
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