adds more procedure test code

tests/icnif/testcode/modtestprocs.nim

@@ -7,3 +7,41 @@ proc baz(a: bool; b: string; c: int): float =
     result = 0.0
   else:
     result = 1.0
+
+proc forwardDecl()
+proc forwardDecl() =
+  foo()
+
+forwardDecl()
+
+proc forwardDecl2*(): int
+proc forwardDecl2*(): int = bar(1)
+
+discard forwardDecl2()
+
+proc forwardDecl3(x, y: int): int
+proc forwardDecl3(x, y: int): int = x - y
+
+discard forwardDecl3(3, 2)
+
+func func1(): int = 123
+discard func1()
+func func2(x: int): int = x
+func func3*(x, y: bool): bool = x and y
+
+proc withDefaultValue(x = 1) = echo x
+withDefaultValue()
+withDefaultValue(2)
+withDefaultValue(x = 3)
+
+proc withDefaultValue2(x = "foo"; y = true) = echo x, y
+withDefaultValue2()
+withDefaultValue2("bar")
+withDefaultValue2(x = "baz", y = false)
+
+proc varParam(x: var int) = x = 10
+var x = 0
+varParam(x)
+
+proc varRet(x: var int): var int = x
+varRet(x) = 100