1 files changed, 131 insertions, 0 deletions
diff --git a/tests/cpp/tconstructor.nim b/tests/cpp/tconstructor.nim
new file mode 100644
index 000000000..922ee54fd
--- /dev/null
+++ b/tests/cpp/tconstructor.nim
@@ -0,0 +1,131 @@
+discard """
+  targets: "cpp"
+  cmd: "nim cpp $file"
+  output: '''
+1
+0
+123
+0
+123
+___
+0
+777
+10
+123
+0
+777
+10
+123
+()
+'''
+"""
+
+{.emit:"""/*TYPESECTION*/
+struct CppClass {
+  int x;
+  int y;
+  CppClass(int inX, int inY) {
+    this->x = inX;
+    this->y = inY;
+  }
+  //CppClass() = default;
+};
+""".}
+
+type  CppClass* {.importcpp, inheritable.} = object
+  x: int32
+  y: int32
+
+proc makeCppClass(x, y: int32): CppClass {.importcpp: "CppClass(@)", constructor.}
+#test globals are init with the constructor call
+var shouldCompile {.used.} = makeCppClass(1, 2)
+
+proc newCpp*[T](): ptr T {.importcpp:"new '*0()".}
+
+#creation
+type NimClassNoNarent* = object
+  x: int32
+
+proc makeNimClassNoParent(x:int32): NimClassNoNarent {. constructor.} =
+  result.x = x
+  discard
+
+let nimClassNoParent = makeNimClassNoParent(1)
+echo nimClassNoParent.x #acess to this just fine. Notice the field will appear last because we are dealing with constructor calls here
+
+var nimClassNoParentDef {.used.}: NimClassNoNarent  #test has a default constructor. 
+
+#inheritance 
+type NimClass* = object of CppClass
+
+proc makeNimClass(x:int32): NimClass {. constructor:"NimClass('1 #1) : CppClass(0, #1) ".} =
+  result.x = x
+
+#optinially define the default constructor so we get rid of the cpp warn and we can declare the obj (note: default constructor of 'tyObject_NimClass__apRyyO8cfRsZtsldq1rjKA' is implicitly deleted because base class 'CppClass' has no default constructor)
+proc makeCppClass(): NimClass {. constructor: "NimClass() : CppClass(0, 0) ".} = 
+  result.x = 1
+
+let nimClass = makeNimClass(1)
+var nimClassDef {.used.}: NimClass  #since we explictly defined the default constructor we can declare the obj
+
+#bug: 22662
+type
+  BugClass* = object
+    x: int          # Not initialized
+
+proc makeBugClass(): BugClass {.constructor.} =
+  discard
+
+proc main =
+  for i in 0 .. 1:
+    var n = makeBugClass()
+    echo n.x
+    n.x = 123
+    echo n.x
+
+main()
+#bug:
+echo "___"
+type
+  NimClassWithDefault = object
+    x: int
+    y = 777
+    case kind: bool = true
+    of true:
+      z: int = 10
+    else: discard
+
+proc makeNimClassWithDefault(): NimClassWithDefault {.constructor.} =
+  result = NimClassWithDefault()
+
+proc init =
+  for i in 0 .. 1:
+    var n = makeNimClassWithDefault()
+    echo n.x
+    echo n.y
+    echo n.z
+    n.x = 123
+    echo n.x
+
+init()
+
+#tests that the ctor is not declared with nodecl. 
+#nodelc also prevents the creation of a default one when another is created.
+type Foo {.exportc.} = object
+
+proc makeFoo(): Foo {.used, constructor, nodecl.} = discard
+
+echo $Foo()
+
+type Boo = object
+proc `=copy`(dest: var Boo; src: Boo) = discard
+
+proc makeBoo(): Boo {.constructor.} = Boo()
+proc makeBoo2(): Boo  = Boo()
+
+block:
+  proc main =
+    var b = makeBoo()
+    var b2 = makeBoo2()
+
+  main()
\ No newline at end of file