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//############################################################################
// for-comprehensions (old and new syntax)
//############################################################################
//############################################################################
object Test extends dotty.runtime.LegacyApp {
val xs = List(1, 2, 3)
val ys = List('a, 'b, 'c)
def it = 0 until 10
val ar = "abc".toCharArray
/////////////////// old syntax ///////////////////
def testOld: Unit = {
println("\ntestOld")
// lists
for (x <- xs) print(x + " "); println
for (x <- xs;
if x % 2 == 0) print(x + " "); println
for {x <- xs
if x % 2 == 0} print(x + " "); println
var n = 0
for (_ <- xs) n += 1; println(n)
for ((x, y) <- xs zip ys) print(x + " "); println
for (p @ (x, y) <- xs zip ys) print(p._1 + " "); println
// iterators
for (x <- it) print(x + " "); println
for (x <- it;
if x % 2 == 0) print(x + " "); println
for {x <- it
if x % 2 == 0} print(x + " "); println
// arrays
for (x <- ar) print(x + " "); println
for (x <- ar;
if x.toInt > 97) print(x + " "); println
for {x <- ar
if x.toInt > 97} print(x + " "); println
}
/////////////////// new syntax ///////////////////
def testNew: Unit = {
println("\ntestNew")
// lists
var n = 0
for (_ <- xs) n += 1; println(n)
for ((x, y) <- xs zip ys) print(x + " "); println
for (p @ (x, y) <- xs zip ys) print(p._1 + " "); println
// iterators
for (x <- it) print(x + " "); println
for (x <- it if x % 2 == 0) print(x + " "); println
for (x <- it; if x % 2 == 0) print(x + " "); println
for (x <- it;
if x % 2 == 0) print(x + " "); println
for (x <- it
if x % 2 == 0) print(x + " "); println
for {x <- it
if x % 2 == 0} print(x + " "); println
for (x <- it;
y = 2
if x % y == 0) print(x + " "); println
for {x <- it
y = 2
if x % y == 0} print(x + " "); println
// arrays
for (x <- ar) print(x + " "); println
}
////////////////////////////////////////////////////
testOld
testNew
}
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