add syntax cIncludeDir "$projpath/include"; do not use recursive search paths; add test tests/tnimterop_cpp.nim

tests/tnimterop_cpp.nim

@@ -0,0 +1,49 @@
+import nimterop/cimport
+import unittest
+
+cDebug()
+
+cIncludeDir "$projpath/include"
+cAddSearchDir "$projpath/include"
+cCompile  cSearchPath "test2.cpp"
+# TODO: allow this to have correct language: cImport("test2.h")
+cImport cSearchPath "test2.hpp"
+
+check TEST_INT == 512
+check test_call_int() == 5
+
+var foo: Foo
+check foo.bar == 2
+
+# var foo2: Foo2[int]
+# var foo2: Foo2Int
+
+when false:
+  doAssert TEST_FLOAT == 5.12
+  doAssert TEST_HEX == 0x512
+
+  var
+    pt: PRIMTYPE
+    ct: CUSTTYPE
+
+    s: STRUCT1
+    s2: STRUCT2
+    s3: STRUCT3
+
+    e: ENUM
+    e2: ENUM2 = enum5
+
+  pt = 3
+  ct = 4
+
+  s.field1 = 5
+  s2.field1 = 6
+  s3.field1 = 7
+
+  e = enum1
+  e2 = enum4
+      
+  doAssert test_call_int_param(5).field1 == 5
+  doAssert test_call_int_param2(5, s2).field1 == 11
+  doAssert test_call_int_param3(5, s).field1 == 10
+  doAssert test_call_int_param4(e) == e2