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expose default_value stringifier

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Allows overriding cmdline::detail::default_value to provide own default value string such as "auto" or "none", for certain values.
This commit is contained in:
Adam Strzelecki 2012-10-22 12:23:16 +02:00
parent 4dfb5d6c94
commit a68095a65c
1 changed files with 7 additions and 1 deletions
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8
cmdline.h
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@ -117,6 +117,12 @@ std::string readable_typename()
return demangle(typeid(T).name());
}
template <class T>
std::string default_value(T def)
{
return detail::lexical_cast<std::string>(def);
}
template <>
inline std::string readable_typename<std::string>()
{
@ -754,7 +760,7 @@ private:
std::string full_description(const std::string &desc){
return
desc+" ("+detail::readable_typename<T>()+
(need?"":" [="+detail::lexical_cast<std::string>(def)+"]")
(need?"":" [="+detail::default_value<T>(def)+"]")
+")";
}