[Cppcms-users] Question about template - recursive function

[Joffrey R. <jof...@im...>]

Hello Everybody,

My English is approximate, I apologize for this inconvenience.

A few words to tell you that "CPPCMS" is a really good framework.

In my project, I use a "template" with recursive function for generating 
XML.

> <%  c++  #include "project_views/sequences_tree.hpp" %>  
> <%  c++  namespace c=  project_views;  %>
> <%  skin%>
> <%  view sequences_tree uses project_views::sequences_tree  %>
> <%  template render()  %><?xml version="1.0"  encoding="UTF-8"?>
> <folder id="<%= parent_id %>">
> <%  foreach obj in currentChildren%>
>
> <%  item%>
>
> <%  if  (  static_cast<char>(obj.type_flags  &  c::treeviewChild::FLAG_FOLDER)  ==  c::treeviewChild::FLAG_FOLDER  )  %>
> <folder pos="<%= obj.position %>"  id="<%= obj.object_id %>"  name="<%= obj.object_name %>"><%  include sequences_tree::recursive_render(obj)  %></folder>
> <%  elif(  static_cast<char>(obj.type_flags  &  c::treeviewChild::FLAG_SEQUENCE)  ==  c::treeviewChild::FLAG_SEQUENCE  )  %>
> <sequence pos="<%= obj.position %>"  guid="<%= obj.object_guid %>"  id="<%= obj.object_id %>"  name="<%= obj.object_name %>"  />
> <%  end%>
>
> <%  end%>
>
> <%  end%>
> </folder>
> <%  end template%>
>   *
> <%  template recursive_render(  c::treeviewChild  o)  %>*
> <%  foreach obj in o.subChildren  %>
>
> <%  item%>
>
> <%  if  (  static_cast<char>(obj.type_flags  &  c::treeviewChild::FLAG_FOLDER)  ==  c::treeviewChild::FLAG_FOLDER  )  %>
> <folder pos="<%= obj.position %>"  id="<%= obj.object_id %>"  name="<%= obj.object_name %>"><%  include sequences_tree::recursive_render(obj)  %></folder>
> <%  elif(  static_cast<char>(obj.type_flags  &  c::treeviewChild::FLAG_SEQUENCE)  ==  c::treeviewChild::FLAG_SEQUENCE  )  %>
> <sequence pos="<%= obj.position %>"  guid="<%= obj.object_guid %>"  id="<%= obj.object_id %>"  name="<%= obj.object_name %>"  />
> <%  end%>
>
> <%  end%>
>
> <%  end%>
> <%  end template%>
>
> <%  end view%>
> <%  end skin%>

That's work, but I wonder why there is an error when I replace 
*"c::treeviewChild **o**"* by *"**const c::treeviewChild& o**"*

Thank you very much in advance for your answer.

Joffrey