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reworked compareNodeWith::nodeValue for gcc 4.0.1

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see http://lists.debian.org/debian-gcc/2004/09/msg00015.html
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jez_higgins 2005-08-21 13:58:40 +00:00
parent 7ce581df1b
commit 1b4e8ebca4
1 changed files with 15 additions and 4 deletions
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19
XPath/impl/xpath_object.hpp
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@ -339,13 +339,24 @@ public:
bool operator()(const DOM::Node<string_type>& node) bool operator()(const DOM::Node<string_type>& node)
{ {
return Op()(nodeValue<T>(node), value_); return Op()(nodeValue<T>()(node), value_);
} // operator() } // operator()
private: private:
template<class RT> RT nodeValue(const DOM::Node<string_type>& node); // this is all far more complicated that I'd hoped. I wanted a template function, specialised on
template<> string_type nodeValue(const DOM::Node<string_type>& node){ return nodeStringValue(node); } // string_type and double. Instead I have finished up using a class with an operator() which is partially
template<> double nodeValue(const DOM::Node<string_type>& node) { return nodeNumberValue(node); } // specialised on string_type and double with an unused template parameter.
// ho hum - see http://lists.debian.org/debian-gcc/2004/09/msg00015.html or
// google for "explicit specialization in non-namespace scope"
template<typename RT, typename dummy=void> struct nodeValue {
RT operator()(const DOM::Node<string_type>& node);
};
template<typename dummy> struct nodeValue<string_type, dummy> {
string_type operator()(const DOM::Node<string_type>& node) { return nodeStringValue(node); }
};
template<typename dummy> struct nodeValue<double, dummy> {
double operator()(const DOM::Node<string_type>& node) { return nodeNumberValue(node); }
};
T value_; T value_;
bool operator==(const compareNodeWith&); bool operator==(const compareNodeWith&);