SettingsVisitor.cpp

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/**********************************************************************
 
  SettingsVisitor.cpp
 
  James Crook
  (C) Audacity Developers, 2007
 
  wxWidgets license. See Licensing.txt
 
*//*******************************************************************/
#include "SettingsVisitor.h"
 
#ifdef _MSC_VER
// If this is compiled with MSVC (Visual Studio)
#pragma warning( push )
#pragma warning( disable: 4100 ) // unused parameters.
#endif //_MSC_VER
 
 
// The ShouldSet and CouldGet functions have an important side effect
// on the pOptionalFlag.  They 'use it up' and clear it down for the next parameter.
 
 
template<bool Const>
SettingsVisitorBase<Const>::~SettingsVisitorBase() = default;
 
template<bool Const>
auto SettingsVisitorBase<Const>::Optional( [[maybe_unused]] Ref<bool> var )
   -> SettingsVisitorBase &
{
   pOptionalFlag = nullptr;
   return *this;
}
 
template<bool Const>
auto SettingsVisitorBase<Const>::OptionalY( Ref<bool> var )
   -> SettingsVisitorBase &
{
   return Optional( var );
}
 
template<bool Const>
auto SettingsVisitorBase<Const>::OptionalN( Ref<bool> var )
   -> SettingsVisitorBase &
{
   return Optional( var );
}
 
// Tests for parameter being optional.
// Prepares for next parameter by clearing the pointer.
// Reports on whether the parameter should be set, i.e. should set 
// if it was chosen to be set, or was not optional.
template<bool Const>
bool SettingsVisitorBase<Const>::ShouldSet()
{
   if( !pOptionalFlag )
      return true;
   bool result = *pOptionalFlag;
   pOptionalFlag = NULL;
   return result;
}
 
// These are functions to override.  They do nothing.
template<bool Const>
void SettingsVisitorBase<Const>::Define(Arg<bool>, const wxChar *,
   bool, bool, bool, bool)
{}
 
template<bool Const>
void SettingsVisitorBase<Const>::Define(Arg<size_t>, const wxChar *,
   int, int, int, int)
{}
 
template<bool Const>
void SettingsVisitorBase<Const>::Define(Arg<int>, const wxChar *,
   int, int, int, int)
{}
 
template<bool Const>
void SettingsVisitorBase<Const>::Define(
   Arg<float>, const wxChar *, float, float, float, float)
{}
 
template<bool Const>
void SettingsVisitorBase<Const>::Define(
   Arg<double>, const wxChar *, float, float, float, float )
{}
 
template<bool Const>
void SettingsVisitorBase<Const>::Define(
   Arg<double>, const wxChar *, double, double, double, double)
{}
 
template<bool Const>
void SettingsVisitorBase<Const>::Define(
   Ref<wxString>, const wxChar *, wxString, wxString, wxString, wxString)
{}
 
template<bool Const>
void SettingsVisitorBase<Const>::DefineEnum(
   Arg<int>, const wxChar *, int, const EnumValueSymbol [], size_t)
{}
 
// Explicit instantiations
template class SettingsVisitorBase<false>;
template class SettingsVisitorBase<true>;
 
#ifdef _MSC_VER
// If this is compiled with MSVC (Visual Studio)
#pragma warning( pop )
#endif //_MSC_VER