[xsd-users] suggestion to optional template

[Chang Chen]

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Hi,

 

I am reading the code which XSD generates, I find that theXSD use optional template for optional property.

 

I suggest that declare operator == and !=to avoid the user can write code such as:

 

…..

typedef ::xsd::cxx::tree::optional< xml_schema::string> string_container_;

string_container_ s;

string_container_ ss;

&#8230;.

 

//????

// problematic.

// it will be compiled and make no sense, because it call optional::operator bool_convertible,

// the return value is 0 or &optional::reset().

If (s == ss) 

{}

 

If  the userswrite if statement like the above, it may mean they want to compare theinternal auto_prt<X> member, but if it is forbidden,we should declare operator == and != as private and do not implement it; and ifthis operation make sense, we should implement it.

 

Thanks


		
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