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-rw-r--r--tests/concepts/tmatrixlib.nim31
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diff --git a/tests/concepts/tmatrixlib.nim b/tests/concepts/tmatrixlib.nim
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+discard """
+output: "0"
+"""
+
+import matrix, matrixalgo
+
+import typetraits # XXX: this should be removed
+
+var m: Matrix[3, 3, int]
+var projectionMatrix: Matrix[4, 4, float]
+
+echo m.transposed.determinant
+setPerspectiveProjection projectionMatrix
+
+template ok(x) = assert x
+template no(x) = assert(not x)
+
+static:
+  ok projectionMatrix is AnyTransform3D
+  no m is AnyTransform3D
+  
+  type SquareStringMatrix = Matrix[5, 5, string]
+  
+  ok SquareStringMatrix is AnyMatrix
+  ok SquareStringMatrix is AnySquareMatrix
+  no SquareStringMatrix is AnyTransform3D
+  
+  ok Matrix[5, 10, int] is AnyMatrix
+  no Matrix[7, 15, float] is AnySquareMatrix
+  no Matrix[4, 4, int] is AnyTransform3D
+