I'm trying to compile MySql++ using Borland's 32-bit compiler. This compiler is well known to have problems with some template syntax. The compiler is also almost obsolete, as it is being replaced with the clang compiler.
However, if the following code can be fixed into a compilable version, time would be saved.
The compiler error occurs at the following line:
template <> MYSQLPP_EXPORT bool String::conv(bool) const;
The compiler error is:
[bcc32 Error] mystring.h(726): E2506 Explicit specialization of 'String::conv<Type>(Type) const' is ambiguous: must specify template arguments
Full parser context
transaction.cpp(32): #include lib\query.h
query.h(37): #include lib\result.h
result.h(40): #include lib\row.h
row.h(33): #include lib\mystring.h
mystring.h(46): namespace mysqlpp
String is a custom string class, and the conv() function is an inline template function within the String class:
/// \brief Template for converting the column data to most any
/// numeric data type.
template <class Type>
Type conv(Type) const
{
// Conversions are done using one of double/long/ulong/llong/ullong
// so we call a helper function to do the work using that type.
// This reduces the amount of template code instantiated.
typedef typename detail::conv_promotion<Type>::type conv_type;
return do_conv<conv_type>(typeid(Type).name());
}
I've tried various modifications, but with no success.
This answer was given by nathanoliver
template <> MYSQLPP_EXPORT bool String::conv<bool>(bool) const;
This silence the bcc32 compiler...!