add xlib.avecl

xlib/avecl/_internal/info/TransposeInfo.py

@@ -0,0 +1,37 @@
+from ..AShape import AShape
+from ..AAxes import AAxes
+
+class TransposeInfo:
+    """
+    TransposeInfo
+
+    arguments
+
+        shape           AShape
+
+        axes_order      AAxes
+
+    errors during the construction:
+
+        ValueError
+
+    result
+
+        .o_shape   AShape
+
+        .no_changes     bool       transpose changes nothing
+
+    """
+
+    __slots__ = ['no_changes', 'o_shape']
+
+    def __init__(self, shape : AShape, axes_order : AAxes):
+        if shape.ndim != axes_order.ndim:
+            raise ValueError('axes must match the shape')
+
+        # Axes order changes nothing?
+        self.o_shape = shape[axes_order]
+        self.no_changes = axes_order == shape.axes_arange()
+
+
+