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template error

Started by Freaker13 May 1, 2004 at 8:23 AM 2 replies 350+ views

Original Post

May 1, 2004 at 8:23 AM

hi all, I get the folowing error when i use this templated function

template<class T> T getSetting(std::string name)
{
  return toVal(settingMap[name]);
}

error C2783: ''T __thiscall cSettingsManager::getSetting(class _STL::basic_string,class _STL::allocator >)'' : could not deduce template argument fo r ''T'' i use the function like this:

int a = cSettingsManager::getSingleton().getSetting("test");

i v'' also tried to do this:

int a = cSettingsManager::getSingleton()<int>.getSetting("test");

but then i get this error: error C2062: type ''int'' unexpected thx in advance

Bobo_the_Programmer

May 1, 2004 at 9:38 AM

The compiler cannot deduce template type parameters when it is dependent upon the return type. You have to explicitly specialize it. You just put the specialization in the wrong spot:

int a = cSettingsManager::getSingleton().getSetting("test");

Freaker13

Author

Freaker13

May 1, 2004 at 9:40 AM

No according to an article on the internet it''s an error in the vs6.0 compiler. the solution is to use an dummy argument.not nice but better than nothing

Aprosenf

May 1, 2004 at 5:25 PM

The following will work. Note that the <int> is to the right of the function name but before the opening parenthesis.

int a = cSettingsManager::getSingleton().getSetting<int>("test") ;

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