fixes #531

tests/manyloc/named_argument_bug/tri_engine/math/vec.nim

@@ -0,0 +1,55 @@
+import
+  macros,
+  tri_engine/config
+
+type
+  TV2*[T:TNumber=TR] = array[0..1, T]
+  TV3*[T:TNumber=TR] = array[0..2, T]
+  TV4*[T:TNumber=TR] = array[0..3, T]
+  TVT*[T:TNumber=TR] = TV2|TV3|TV4
+  #TV2* = array[0..1, TR]
+  #TV3* = array[0..2, TR]
+  #TV4* = array[0..3, TR]
+
+# TODO: Change to TVT when compiler issue is resolved.
+proc `$`*[T](o: TV2[T]): string =
+  result = "("
+  for i in 0 .. <o.len:
+    result &= $o[0]
+    if i != o.len - 1:
+      result &= ", "
+
+  result & ")"
+
+proc newV2T*[T](x, y: T=0): TV2[T] =
+  [x, y]
+
+proc newV2*(x, y: TR=0.0): TV2[TR] =
+  [x, y]
+
+proc newV2xy*(xy: TR): TV2[TR] =
+  [xy, xy]
+
+proc x*[T](o: TV2[T]): T =
+  o[0]
+
+proc y*[T](o: TV2[T]): T =
+  o[1]
+
+proc `*`*(lhs: TV2[TR], rhs: TV2[TR]): TV2[TR] =
+  [(lhs.x * rhs.x).TR, (lhs.y * rhs.y).TR]
+
+proc `+`*(lhs: TV2[TR], rhs: TV2[TR]): TV2[TR] =
+  [(lhs.x + rhs.x).TR, (lhs.y + rhs.y).TR]
+
+#proc dotProduct[T](a: TVT[T], b: TVT[T]): T =
+#  for i in 0 .. a.len - 1:
+#    result += a[i] * b[i]
+
+proc dot[T](a, b: TV2[T]): T =
+  for i in 0 .. <a.len:
+    result += a[i] * b[i]
+
+assert dot(newV2(), newV2()) == 0.0
+assert dot(newV2(2, 3), newV2(6, 7)) == 33.0
+assert dot([2.0, 3.0], [6.0, 7.0]) == 33.0