micro_os_plus::micro_test_plus::detail::eq_< Lhs_T, Rhs_T > Struct Template Reference

Equality comparator struct template. More...

#include <micro-os-plus/micro-test-plus.h>

Inheritance diagram for micro_os_plus::micro_test_plus::detail::eq_< Lhs_T, Rhs_T >:

Public Member Functions
constexpr	eq_ (const Lhs_T &lhs={}, const Rhs_T &rhs={})
	Constructs an equality comparator for the given operands.
constexpr auto	lhs (void) const
	Retrieves the left-hand operand.
constexpr	operator bool () const
	Conversion operator to boolean.
constexpr auto	rhs (void) const
	Retrieves the right-hand operand.

Public Attributes
const Lhs_T	lhs_ {}
	Stores the left-hand operand.
const Rhs_T	rhs_ {}
	Stores the right-hand operand.
const bool	value_ {}
	Stores the result of the equality comparison.

Detailed Description

template<class Lhs_T, class Rhs_T>
struct micro_os_plus::micro_test_plus::detail::eq_< Lhs_T, Rhs_T >

Template Parameters

Lhs_T	The type of the left-hand operand.
Rhs_T	The type of the right-hand operand.

The eq_ struct template provides a type-safe mechanism for evaluating equality between two operands within the framework.

This comparator supports a variety of operand types, including those with static values, types with precision (epsilon), and generic types. For types with static values, the comparison is performed directly. For types supporting precision, the comparison accounts for the smallest epsilon to ensure accuracy, particularly for floating-point types. For all other types, the generic getter is used to retrieve and compare the values.

The implementation is optimised for use in embedded environments and supports both compile-time and run-time evaluation.

All definitions are intended for internal use within the framework and are implemented in the include/micro-os-plus/micro-test-plus folder to maintain a structured and modular codebase.

Definition at line 259 of file detail.h.

Constructor & Destructor Documentation

eq_()

template<class Lhs_T, class Rhs_T>

micro_os_plus::micro_test_plus::detail::eq_< Lhs_T, Rhs_T >::eq_ ( const Lhs_T & lhs = {}, const Rhs_T & rhs = {} )

inlineconstexpr

Parameters

lhs	The left-hand operand.
rhs	The right-hand operand.

Evaluates the equality of the provided operands at construction, supporting static values, types with precision, and generic types. The result is stored in the value_ member for efficient access.

Definition at line 272 of file detail.h.

                                        {}, const Rhs_T& rhs = {})
          : lhs_{ lhs }, rhs_{ rhs }, value_{
              [&]
                {
                  // This lambda is called in the constructor to
                  // evaluate the comparison.
                  using std::operator==;
                  using std::operator<;
 
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wfloat-equal"
#pragma GCC diagnostic ignored "-Wconversion"
#pragma GCC diagnostic ignored "-Wdouble-promotion"
#pragma GCC diagnostic ignored "-Wsign-compare"
#if defined(__clang__)
#pragma clang diagnostic ignored "-Wimplicit-int-float-conversion"
#pragma clang diagnostic ignored "-Wpedantic"
#endif
#endif
                  if constexpr (type_traits::has_value_v<Lhs_T>
                                and type_traits::has_value_v<Rhs_T>)
                    {
                      // If both types have values (like numeric constants),
                      // compare them directly.
                      return Lhs_T::value == Rhs_T::value;
                    }
                  else if constexpr (type_traits::has_epsilon_v<Lhs_T>
                                     and type_traits::has_epsilon_v<Rhs_T>)
                    {
                      // If both values have precision, compare them using
                      // the smalles precision.
                      return math::abs (get (lhs) - get (rhs))
                             < math::min_value (Lhs_T::epsilon,
                                                Rhs_T::epsilon);
                    }
                  else if constexpr (type_traits::has_epsilon_v<Lhs_T>)
                    {
                      // If only the left operand has precision, use it.
                      return math::abs (get (lhs) - get (rhs))
                             < Lhs_T::epsilon;
                    }
                  else if constexpr (type_traits::has_epsilon_v<Rhs_T>)
                    {
                      // If only the right operand has precision, use it.
                      return math::abs (get (lhs) - get (rhs))
                             < Rhs_T::epsilon;
                    }
                  else
                    {
                      // Call the generic getters, which might
                      // either call the type get() or return the value.
                      return get (lhs) == get (rhs);
                    }
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
                }()
            }
      {
      }

References lhs().

Member Function Documentation

lhs()

template<class Lhs_T, class Rhs_T>

auto micro_os_plus::micro_test_plus::detail::eq_< Lhs_T, Rhs_T >::lhs ( void ) const

inlinenodiscardconstexpr

Parameters

None.

Returns

The extracted left-hand operand.

Returns the value of the left-hand operand, applying the generic getter to ensure correct extraction for both custom and standard types.

Definition at line 364 of file detail.h.

      {
        return get (lhs_);
      }

References micro_os_plus::micro_test_plus::detail::get(), and lhs_.

Referenced by eq_(), and micro_os_plus::micro_test_plus::test_reporter::operator<<().

operator bool()

template<class Lhs_T, class Rhs_T>

micro_os_plus::micro_test_plus::detail::eq_< Lhs_T, Rhs_T >::operator bool ( ) const

inlinenodiscardconstexpr

Parameters

None.

Return values

true	The operands are considered equal.
false	The operands are not equal.

Returns the result of the equality comparison.

Definition at line 346 of file detail.h.

      {
        return value_;
      }

References value_.

rhs()

template<class Lhs_T, class Rhs_T>

auto micro_os_plus::micro_test_plus::detail::eq_< Lhs_T, Rhs_T >::rhs ( void ) const

inlinenodiscardconstexpr

Parameters

None.

Returns

The extracted right-hand operand.

Returns the value of the right-hand operand, applying the generic getter to ensure correct extraction for both custom and standard types.

Definition at line 382 of file detail.h.

      {
        return get (rhs_);
      }

References micro_os_plus::micro_test_plus::detail::get(), and rhs_.

Referenced by micro_os_plus::micro_test_plus::test_reporter::operator<<().

Member Data Documentation

lhs_

template<class Lhs_T, class Rhs_T>

const Lhs_T micro_os_plus::micro_test_plus::detail::eq_< Lhs_T, Rhs_T >::lhs_ {}

Definition at line 390 of file detail.h.

{};

Referenced by lhs().

rhs_

template<class Lhs_T, class Rhs_T>

const Rhs_T micro_os_plus::micro_test_plus::detail::eq_< Lhs_T, Rhs_T >::rhs_ {}

Definition at line 395 of file detail.h.

{};

Referenced by rhs().

value_

template<class Lhs_T, class Rhs_T>

const bool micro_os_plus::micro_test_plus::detail::eq_< Lhs_T, Rhs_T >::value_ {}

Definition at line 400 of file detail.h.

{};

Referenced by operator bool().

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The documentation for this struct was generated from the following file:

• detail.h