Add tests for constructor arguments with side effects

Author: timotheeandres

tests/run/inline-trait-signature-side-effects-1.check

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+0
+0
+1
+0
+1
+2

tests/run/inline-trait-signature-side-effects-1.scala

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+inline trait A(i: Int):
+  val x = i
+  val y = i
+
+class B(i: Int) extends A(i)
+
+@main def Test =
+  var c = 0
+
+  val b1 = new B({
+    for i <- 0 to c
+    do println(i)
+    c += 1
+    c
+  })
+  val b2 = new B({
+    for i <- 0 to c
+    do println(i)
+    c += 1
+    c
+  })
+  val b3 = new B({
+    for i <- 0 to c
+    do println(i)
+    c += 1
+    c
+  })

tests/run/inline-trait-signature-side-effects-2.check

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+0
+0
+1
+0
+1
+2

tests/run/inline-trait-signature-side-effects-2.scala

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+inline trait A(i: Int):
+  val x = i
+  val y = i
+
+class B(i: Int) extends A(i)
+
+@main def Test =
+  var c = 0
+
+  for _ <- 0 until 3
+  do new B({
+    for i <- 0 to c
+    do println(i)
+    c += 1
+    c
+  })