// -*- c++ -*-
/* Do not edit! -- generated file */
#ifndef _SIGC_LAMBDA_BASE_HPP_
#define _SIGC_LAMBDA_BASE_HPP_
#include <sigc++/adaptors/adaptor_trait.h>
#include <sigc++/reference_wrapper.h>

namespace sigc {

/** @defgroup lambdas Lambdas
 * libsigc++ ships with basic lambda functionality and the sigc::group adaptor that uses lambdas to transform a functor's parameter list.
 *
 * The lambda selectors sigc::_1, sigc::_2, ..., sigc::_9 are used to select the
 * first, second, ..., nineth argument from a list.
 *
 * @par Examples:
 *   @code
 *   std::cout << sigc::_1(10,20,30); // returns 10
 *   std::cout << sigc::_2(10,20,30); // returns 20
 *   ...
 *   @endcode
 *
 * Operators are defined so that lambda selectors can be used e.g. as placeholders in
 * arithmetic expressions.
 *
 * @par Examples:
 *   @code
 *   std::cout << (sigc::_1 + 5)(3); // returns (3 + 5)
 *   std::cout << (sigc::_1 * sigc::_2)(7,10); // returns (7 * 10)
 *   @endcode
 */

/** A hint to the compiler.
 * All lambda types publically inherit from this hint.
 *
 * @ingroup lambdas
 */
struct lambda_base : public adaptor_base {};

// Forward declaration of lambda.
template <class T_type> struct lambda;


namespace internal {

/** Abstracts lambda functionality.
 * Objects of this type store a value that may be of type lambda itself.
 * In this case, operator()() executes the lambda (a lambda is always a functor at the same time).
 * Otherwise, operator()() simply returns the stored value.
 */
template <class T_type, bool I_islambda = is_base_and_derived<lambda_base, T_type>::value> struct lambda_core;

/// Abstracts lambda functionality (template specialization for lambda values).
template <class T_type>
struct lambda_core<T_type, true> : public lambda_base
{
  template <class T_arg1=void, class T_arg2=void, class T_arg3=void, class T_arg4=void, class T_arg5=void, class T_arg6=void, class T_arg7=void>
  struct deduce_result_type
    { typedef typename T_type::template deduce_result_type<typename type_trait<T_arg1>::pass, typename type_trait<T_arg2>::pass, typename type_trait<T_arg3>::pass, typename type_trait<T_arg4>::pass, typename type_trait<T_arg5>::pass, typename type_trait<T_arg6>::pass, typename type_trait<T_arg7>::pass>::type type; };
  typedef typename T_type::result_type result_type;
  typedef T_type lambda_type;

  result_type
  operator()() const;

  template <class T_arg1>
  typename deduce_result_type<T_arg1>::type
  operator ()(T_arg1 _A_1) const 
    { return value_.SIGC_WORKAROUND_OPERATOR_PARENTHESES<typename type_trait<T_arg1>::pass>
             (_A_1); 
    }

  #ifndef SIGC_TEMPLATE_SPECIALIZATION_OPERATOR_OVERLOAD
  template <class T_arg1>
  typename deduce_result_type<T_arg1>::type
  sun_forte_workaround(T_arg1 _A_1) const
    { return value_.SIGC_WORKAROUND_OPERATOR_PARENTHESES<typename type_trait<T_arg1>::pass>
             (_A_1); 
    }
  #endif //SIGC_TEMPLATE_SPECIALIZATION_OPERATOR_OVERLOAD

  template <class T_arg1, class T_arg2>
  typename deduce_result_type<T_arg1, T_arg2>::type
  operator ()(T_arg1 _A_1, T_arg2 _A_2) const 
    { return value_.SIGC_WORKAROUND_OPERATOR_PARENTHESES<typename type_trait<T_arg1>::pass, typename type_trait<T_arg2>::pass>
             (_A_1, _A_2); 
    }

  #ifndef SIGC_TEMPLATE_SPECIALIZATION_OPERATOR_OVERLOAD
  template <class T_arg1, class T_arg2>
  typename deduce_result_type<T_arg1, T_arg2>::type
  sun_forte_workaround(T_arg1 _A_1, T_arg2 _A_2) const
    { return value_.SIGC_WORKAROUND_OPERATOR_PARENTHESES<typename type_trait<T_arg1>::pass, typename type_trait<T_arg2>::pass>
             (_A_1, _A_2); 
    }
  #endif //SIGC_TEMPLATE_SPECIALIZATION_OPERATOR_OVERLOAD

  template <class T_arg1, class T_arg2, class T_arg3>
  typename deduce_result_type<T_arg1, T_arg2, T_arg3>::type
  operator ()(T_arg1 _A_1, T_arg2 _A_2, T_arg3 _A_3) const 
    { return value_.SIGC_WORKAROUND_OPERATOR_PARENTHESES<typename type_trait<T_arg1>::pass, typename type_trait<T_arg2>::pass, typename type_trait<T_arg3>::pass>
             (_A_1, _A_2, _A_3); 
    }

  #ifndef SIGC_TEMPLATE_SPECIALIZATION_OPERATOR_OVERLOAD
  template <class T_arg1, class T_arg2, class T_arg3>
  typename deduce_result_type<T_arg1, T_arg2, T_arg3>::type
  sun_forte_workaround(T_arg1 _A_1, T_arg2 _A_2, T_arg3 _A_3) const
    { return value_.SIGC_WORKAROUND_OPERATOR_PARENTHESES<typename type_trait<T_arg1>::pass, typename type_trait<T_arg2>::pass, typename type_trait<T_arg3>::pass>
             (_A_1, _A_2, _A_3); 
    }
  #endif //SIGC_TEMPLATE_SPECIALIZATION_OPERATOR_OVERLOAD

  template <class T_arg1, class T_arg2, class T_arg3, class T_arg4>
  typename deduce_result_type<T_arg1, T_arg2, T_arg3, T_arg4>::type
  operator ()(T_arg1 _A_1, T_arg2 _A_2, T_arg3 _A_3, T_arg4 _A_4) const 
    { return value_.SIGC_WORKAROUND_OPERATOR_PARENTHESES<typename type_trait<T_arg1>::pass, typename type_trait<T_arg2>::pass, typename type_trait<T_arg3>::pass, typename type_trait<T_arg4>::pass>
             (_A_1, _A_2, _A_3, _A_4); 
    }

  #ifndef SIGC_TEMPLATE_SPECIALIZATION_OPERATOR_OVERLOAD
  template <class T_arg1, class T_arg2, class T_arg3, class T_arg4>
  typename deduce_result_type<T_arg1, T_arg2, T_arg3, T_arg4>::type
  sun_forte_workaround(T_arg1 _A_1, T_arg2 _A_2, T_arg3 _A_3, T_arg4 _A_4) const
    { return value_.SIGC_WORKAROUND_OPERATOR_PARENTHESES<typename type_trait<T_arg1>::pass, typename type_trait<T_arg2>::pass, typename type_trait<T_arg3>::pass, typename type_trait<T_arg4>::pass>
             (_A_1, _A_2, _A_3, _A_4); 
    }
  #endif //SIGC_TEMPLATE_SPECIALIZATION_OPERATOR_OVERLOAD

  template <class T_arg1, class T_arg2, class T_arg3, class T_arg4, class T_arg5>
  typename deduce_result_type<T_arg1, T_arg2, T_arg3, T_arg4, T_arg5>::type
  operator ()(T_arg1 _A_1, T_arg2 _A_2, T_arg3 _A_3, T_arg4 _A_4, T_arg5 _A_5) const 
    { return value_.SIGC_WORKAROUND_OPERATOR_PARENTHESES<typename type_trait<T_arg1>::pass, typename type_trait<T_arg2>::pass, typename type_trait<T_arg3>::pass, typename type_trait<T_arg4>::pass, typename type_trait<T_arg5>::pass>
             (_A_1, _A_2, _A_3, _A_4, _A_5); 
    }

  #ifndef SIGC_TEMPLATE_SPECIALIZATION_OPERATOR_OVERLOAD
  template <class T_arg1, class T_arg2, class T_arg3, class T_arg4, class T_arg5>
  typename deduce_result_type<T_arg1, T_arg2, T_arg3, T_arg4, T_arg5>::type
  sun_forte_workaround(T_arg1 _A_1, T_arg2 _A_2, T_arg3 _A_3, T_arg4 _A_4, T_arg5 _A_5) const
    { return value_.SIGC_WORKAROUND_OPERATOR_PARENTHESES<typename type_trait<T_arg1>::pass, typename type_trait<T_arg2>::pass, typename type_trait<T_arg3>::pass, typename type_trait<T_arg4>::pass, typename type_trait<T_arg5>::pass>
             (_A_1, _A_2, _A_3, _A_4, _A_5); 
    }
  #endif //SIGC_TEMPLATE_SPECIALIZATION_OPERATOR_OVERLOAD

  template <class T_arg1, class T_arg2, class T_arg3, class T_arg4, class T_arg5, class T_arg6>
  typename deduce_result_type<T_arg1, T_arg2, T_arg3, T_arg4, T_arg5, T_arg6>::type
  operator ()(T_arg1 _A_1, T_arg2 _A_2, T_arg3 _A_3, T_arg4 _A_4, T_arg5 _A_5, T_arg6 _A_6) const 
    { return value_.SIGC_WORKAROUND_OPERATOR_PARENTHESES<typename type_trait<T_arg1>::pass, typename type_trait<T_arg2>::pass, typename type_trait<T_arg3>::pass, typename type_trait<T_arg4>::pass, typename type_trait<T_arg5>::pass, typename type_trait<T_arg6>::pass>
             (_A_1, _A_2, _A_3, _A_4, _A_5, _A_6); 
    }

  #ifndef SIGC_TEMPLATE_SPECIALIZATION_OPERATOR_OVERLOAD
  template <class T_arg1, class T_arg2, class T_arg3, class T_arg4, class T_arg5, class T_arg6>
  typename deduce_result_type<T_arg1, T_arg2, T_arg3, T_arg4, T_arg5, T_arg6>::type
  sun_forte_workaround(T_arg1 _A_1, T_arg2 _A_2, T_arg3 _A_3, T_arg4 _A_4, T_arg5 _A_5, T_arg6 _A_6) const
    { return value_.SIGC_WORKAROUND_OPERATOR_PARENTHESES<typename type_trait<T_arg1>::pass, typename type_trait<T_arg2>::pass, typename type_trait<T_arg3>::pass, typename type_trait<T_arg4>::pass, typename type_trait<T_arg5>::pass, typename type_trait<T_arg6>::pass>
             (_A_1, _A_2, _A_3, _A_4, _A_5, _A_6); 
    }
  #endif //SIGC_TEMPLATE_SPECIALIZATION_OPERATOR_OVERLOAD

  template <class T_arg1, class T_arg2, class T_arg3, class T_arg4, class T_arg5, class T_arg6, class T_arg7>
  typename deduce_result_type<T_arg1, T_arg2, T_arg3, T_arg4, T_arg5, T_arg6, T_arg7>::type
  operator ()(T_arg1 _A_1, T_arg2 _A_2, T_arg3 _A_3, T_arg4 _A_4, T_arg5 _A_5, T_arg6 _A_6, T_arg7 _A_7) const 
    { return value_.SIGC_WORKAROUND_OPERATOR_PARENTHESES<typename type_trait<T_arg1>::pass, typename type_trait<T_arg2>::pass, typename type_trait<T_arg3>::pass, typename type_trait<T_arg4>::pass, typename type_trait<T_arg5>::pass, typename type_trait<T_arg6>::pass, typename type_trait<T_arg7>::pass>
             (_A_1, _A_2, _A_3, _A_4, _A_5, _A_6, _A_7); 
    }

  #ifndef SIGC_TEMPLATE_SPECIALIZATION_OPERATOR_OVERLOAD
  template <class T_arg1, class T_arg2, class T_arg3, class T_arg4, class T_arg5, class T_arg6, class T_arg7>
  typename deduce_result_type<T_arg1, T_arg2, T_arg3, T_arg4, T_arg5, T_arg6, T_arg7>::type
  sun_forte_workaround(T_arg1 _A_1, T_arg2 _A_2, T_arg3 _A_3, T_arg4 _A_4, T_arg5 _A_5, T_arg6 _A_6, T_arg7 _A_7) const
    { return value_.SIGC_WORKAROUND_OPERATOR_PARENTHESES<typename type_trait<T_arg1>::pass, typename type_trait<T_arg2>::pass, typename type_trait<T_arg3>::pass, typename type_trait<T_arg4>::pass, typename type_trait<T_arg5>::pass, typename type_trait<T_arg6>::pass, typename type_trait<T_arg7>::pass>
             (_A_1, _A_2, _A_3, _A_4, _A_5, _A_6, _A_7); 
    }
  #endif //SIGC_TEMPLATE_SPECIALIZATION_OPERATOR_OVERLOAD

  lambda_core() {}

  explicit lambda_core(const T_type& v)
    : value_(v) {}

  T_type value_;
};

template <class T_type>
typename lambda_core<T_type, true>::result_type
lambda_core<T_type, true>::operator()() const
  { return value_(); }


/// Abstracts lambda functionality (template specialization for other value types).
template <class T_type>
struct lambda_core<T_type, false> : public lambda_base
{
  template <class T_arg1=void, class T_arg2=void, class T_arg3=void, class T_arg4=void, class T_arg5=void, class T_arg6=void, class T_arg7=void>
  struct deduce_result_type
    { typedef T_type type; };
  typedef T_type result_type; // all operator() overloads return T_type.
  typedef lambda<T_type> lambda_type;

  result_type operator()() const;

  template <class T_arg1>
  result_type operator ()(T_arg1) const 
    { return value_; }

  #ifndef SIGC_TEMPLATE_SPECIALIZATION_OPERATOR_OVERLOAD
  template <class T_arg1>
  result_type sun_forte_workaround(T_arg1) const
    { return value_; }
  #endif //SIGC_TEMPLATE_SPECIALIZATION_OPERATOR_OVERLOAD

  template <class T_arg1, class T_arg2>
  result_type operator ()(T_arg1, T_arg2) const 
    { return value_; }

  #ifndef SIGC_TEMPLATE_SPECIALIZATION_OPERATOR_OVERLOAD
  template <class T_arg1, class T_arg2>
  result_type sun_forte_workaround(T_arg1, T_arg2) const
    { return value_; }
  #endif //SIGC_TEMPLATE_SPECIALIZATION_OPERATOR_OVERLOAD

  template <class T_arg1, class T_arg2, class T_arg3>
  result_type operator ()(T_arg1, T_arg2, T_arg3) const 
    { return value_; }

  #ifndef SIGC_TEMPLATE_SPECIALIZATION_OPERATOR_OVERLOAD
  template <class T_arg1, class T_arg2, class T_arg3>
  result_type sun_forte_workaround(T_arg1, T_arg2, T_arg3) const
    { return value_; }
  #endif //SIGC_TEMPLATE_SPECIALIZATION_OPERATOR_OVERLOAD

  template <class T_arg1, class T_arg2, class T_arg3, class T_arg4>
  result_type operator ()(T_arg1, T_arg2, T_arg3, T_arg4) const 
    { return value_; }

  #ifndef SIGC_TEMPLATE_SPECIALIZATION_OPERATOR_OVERLOAD
  template <class T_arg1, class T_arg2, class T_arg3, class T_arg4>
  result_type sun_forte_workaround(T_arg1, T_arg2, T_arg3, T_arg4) const
    { return value_; }
  #endif //SIGC_TEMPLATE_SPECIALIZATION_OPERATOR_OVERLOAD

  template <class T_arg1, class T_arg2, class T_arg3, class T_arg4, class T_arg5>
  result_type operator ()(T_arg1, T_arg2, T_arg3, T_arg4, T_arg5) const 
    { return value_; }

  #ifndef SIGC_TEMPLATE_SPECIALIZATION_OPERATOR_OVERLOAD
  template <class T_arg1, class T_arg2, class T_arg3, class T_arg4, class T_arg5>
  result_type sun_forte_workaround(T_arg1, T_arg2, T_arg3, T_arg4, T_arg5) const
    { return value_; }
  #endif //SIGC_TEMPLATE_SPECIALIZATION_OPERATOR_OVERLOAD

  template <class T_arg1, class T_arg2, class T_arg3, class T_arg4, class T_arg5, class T_arg6>
  result_type operator ()(T_arg1, T_arg2, T_arg3, T_arg4, T_arg5, T_arg6) const 
    { return value_; }

  #ifndef SIGC_TEMPLATE_SPECIALIZATION_OPERATOR_OVERLOAD
  template <class T_arg1, class T_arg2, class T_arg3, class T_arg4, class T_arg5, class T_arg6>
  result_type sun_forte_workaround(T_arg1, T_arg2, T_arg3, T_arg4, T_arg5, T_arg6) const
    { return value_; }
  #endif //SIGC_TEMPLATE_SPECIALIZATION_OPERATOR_OVERLOAD

  template <class T_arg1, class T_arg2, class T_arg3, class T_arg4, class T_arg5, class T_arg6, class T_arg7>
  result_type operator ()(T_arg1, T_arg2, T_arg3, T_arg4, T_arg5, T_arg6, T_arg7) const 
    { return value_; }

  #ifndef SIGC_TEMPLATE_SPECIALIZATION_OPERATOR_OVERLOAD
  template <class T_arg1, class T_arg2, class T_arg3, class T_arg4, class T_arg5, class T_arg6, class T_arg7>
  result_type sun_forte_workaround(T_arg1, T_arg2, T_arg3, T_arg4, T_arg5, T_arg6, T_arg7) const
    { return value_; }
  #endif //SIGC_TEMPLATE_SPECIALIZATION_OPERATOR_OVERLOAD

  explicit lambda_core(typename type_trait<T_type>::take v)
    : value_(v) {}

  T_type value_;
};

template <class T_type>
typename lambda_core<T_type, false>::result_type lambda_core<T_type, false>::operator()() const
  { return value_; }

} /* namespace internal */


//template specialization of visit_each<>(action, functor):
template <class T_action, class T_functor, bool I_islambda>
void visit_each(const T_action& _A_action,
                const internal::lambda_core<T_functor, I_islambda>& _A_target)
{
  visit_each(_A_action, _A_target.value_);
}


// forward declarations for lambda operators other<subscript> and other<assign>
template <class T_type>
struct other;
struct subscript;
struct assign;

template <class T_action, class T_type1, class T_type2>
struct lambda_operator;

template <class T_type>
struct unwrap_lambda_type;


/** Lambda type.
 * Objects of this type store a value that may be of type lambda itself.
 * In this case, operator()() executes the lambda (a lambda is always a functor at the same time).
 * Otherwise, operator()() simply returns the stored value.
 * The assign and subscript operators are defined to return a lambda operator.
 *
 * @ingroup lambdas
 */
template <class T_type>
struct lambda : public internal::lambda_core<T_type>
{
  typedef lambda<T_type> self;

  lambda()
    {}

  lambda(typename type_trait<T_type>::take v)
    : internal::lambda_core<T_type>(v) 
    {}

  // operators for other<subscript>
  template <class T_arg>
  lambda<lambda_operator<other<subscript>, self, typename unwrap_lambda_type<T_arg>::type> >
  operator [] (const T_arg& a) const
    { typedef lambda_operator<other<subscript>, self, typename unwrap_lambda_type<T_arg>::type> lambda_operator_type;
      return lambda<lambda_operator_type>(lambda_operator_type(this->value_, unwrap_lambda_value(a))); }

  // operators for other<assign>
  template <class T_arg>
  lambda<lambda_operator<other<assign>, self, typename unwrap_lambda_type<T_arg>::type> >
  operator = (const T_arg& a) const
    { typedef lambda_operator<other<assign>, self, typename unwrap_lambda_type<T_arg>::type> lambda_operator_type;
      return lambda<lambda_operator_type>(lambda_operator_type(this->value_, unwrap_lambda_value(a))); }
};


//template specialization of visit_each<>(action, functor):
template <class T_action, class T_type>
void visit_each(const T_action& _A_action,
                const lambda<T_type>& _A_target)
{
  visit_each(_A_action, _A_target.value_);
}


/** Converts a reference into a lambda object.
 * sigc::var creates a 0-ary functor, returning the value of a referenced variable. 
 *
 * @par Example:
 *   @code
 *   int main(int argc, char* argv)
 *   {
 *     int data;
 *     sigc::signal<int> readValue;
 *
 *     readValue.connect(sigc::var(data));
 *
 *     data = 3;
 *     std::cout << readValue() << std::endl; //Prints 3.
 *
 *    data = 5;
 *    std::cout << readValue() << std::endl; //Prints 5.
 *   }
 *   @endcode
 */
template <class T_type>
lambda<T_type&> var(T_type& v)
{ return lambda<T_type&>(v); }

/** Converts a constant reference into a lambda object.
 */
template <class T_type>
lambda<const T_type&> var(const T_type& v)
{ return lambda<const T_type&>(v); }


/** Deduces the type of the object stored in an object of the passed lambda type.
 * If the type passed as template argument is no lambda type,
 * type is defined to unwrap_reference<T_type>::type.
 */
template <class T_type>
struct unwrap_lambda_type
{ typedef typename unwrap_reference<T_type>::type type; };

template <class T_type>
struct unwrap_lambda_type<lambda<T_type> >
{ typedef T_type type; };


/** Gets the object stored inside a lambda object.
 * Returns the object passed as argument if it is not of type lambda.
 */
template <class T_type>
T_type& unwrap_lambda_value(T_type& a)
{ return a; }

template <class T_type>
const T_type& unwrap_lambda_value(const T_type& a)
{ return a; }

template <class T_type>
const T_type& unwrap_lambda_value(const lambda<T_type>& a)
{ return a.value_; }

} /* namespace sigc */

#endif /* _SIGC_LAMBDA_BASE_HPP_ */
