Added a python script to concat all natvis files into a single one (f…

…or use with Visual Studio Code, on mac for example)

.gitignore

@@ -21,3 +21,6 @@ test_fails.txt
 *.sublime-project
 cmake-build-debug
 
+developer/msvc/Visualizers/all_concat.natvis
+.vscode/
+

developer/msvc/Visualizers/concat_natvis.py

@@ -0,0 +1,59 @@
+"""
+This small snippet will open all the *.natvis files and concat them into a
+single one to be able to use them in Visual Studio Code (for Mac for eg)
+vscode-cpptools expects only one visualizerFile currently
+"""
+
+import xml.etree.ElementTree as ET
+import glob as gb
+
+OUT_FILENAME = 'all_concat.natvis'
+
+
+def concat_all_natvis_files():
+    """
+    Main function
+    """
+    natvis_files = gb.glob('*.natvis')
+    if OUT_FILENAME in natvis_files:
+        natvis_files.remove(OUT_FILENAME)
+
+    # In order to avoid the ns0 prefix the default namespace should be set
+    schema = 'http://schemas.microsoft.com/vstudio/debugger/natvis/2010'
+    # before reading the XML data.
+    ET.register_namespace('', schema)
+
+    # Open the file first found
+    print("Opening first: {}".format(natvis_files[0]))
+    tree = ET.parse(natvis_files[0])
+    root = tree.getroot()
+
+    ori_n_child = len(root)
+    total_n_child = ori_n_child
+
+    # Loop on the rest
+    for fname in natvis_files[1:]:
+        tree2 = ET.parse(fname)
+        root2 = tree2.getroot()
+        n_child = len(root2)
+        print("Parsing '{}', {} children".format(fname, n_child))
+        total_n_child += n_child
+        # Append each child or root2 to the first root
+        for child in root2.iter():
+            root.append(child)
+
+    final_n_child = len(root)
+    if final_n_child == total_n_child:
+        print("\nOK: Started with {}, Ended with {} children as "
+              "expected".format(ori_n_child, final_n_child))
+    else:
+        print("\nProblem: Started with {}, Ended with {} children, "
+              "expected {}".format(ori_n_child, final_n_child, total_n_child))
+
+    print("\nSaving to {}".format(OUT_FILENAME))
+    tree.write(OUT_FILENAME, encoding='utf-8', xml_declaration=True)
+
+
+# If run from a terminal
+if __name__ == '__main__':
+    concat_all_natvis_files()