micro_os_plus::micro_test_plus::detail Namespace Reference

Internal implementation details for the µTest++ framework. More...

Classes
struct	and_
	Logical AND comparator struct template. More...
struct	assertion
	Assertion struct template for parameter passing to the evaluator. More...
struct	binary_op_
	Common base struct template for binary comparators. More...
struct	callable_op_
	Common base struct for callable-wrapping operators. More...
struct	colours
	Colours used to highlight pass and fail results in test reports. More...
class	deferred_reporter
	Deferred reporter class for a specific expression. More...
class	deferred_reporter_base
	Base class for a deferred reporter that collects messages into a string. More...
struct	eq_
	Equality comparator struct template. More...
class	expression_formatter
	Formats values and expressions into an owned string buffer. More...
struct	ge_
	Greater than or equal comparator struct template. More...
struct	gt_
	Greater than comparator struct template. More...
struct	indent_t
	Parameterised stream manipulator for outputting indentation. More...
struct	le_
	Less than or equal comparator struct template. More...
struct	lt_
	Less than comparator struct template. More...
struct	ne_
	Non-equality comparator struct template. More...
struct	not_
	Logical NOT comparator struct template. More...
struct	nothrow_
	Operator struct template to check if an expression does not throw any exception. More...
struct	or_
	Logical OR comparator struct template. More...
class	runnable
	CRTP base class factoring out callable storage, rule-of-five, and run() logic shared by subtest and suite. More...
class	runnable_base
	Non-template base for all runnable objects (suites and subtests). More...
class	runner_totals
	Aggregated pass/fail/subtest counters for a node in the test tree. More...
class	test_node
	Base class for runners and runable tests. More...
struct	throws_
	Operator struct template to check if an expression throws a specific exception. More...
struct	throws_< Callable_T, void >
	Operator struct template to check if an expression throws any exception. More...
class	timestamp
	A single point-in-time measurement, wrapping a timespec value. More...
class	timestamps
	A begin/end timestamp pair used to measure elapsed time. More...
struct	unary_op_
	Common base struct template for unary comparators. More...

Functions
template<typename Lhs_T, typename Rhs_T>
	and_ (const Lhs_T &, const Rhs_T &) -> and_< Lhs_T, Rhs_T >
template<class T> requires std::is_arithmetic_v<T>
void	append_number_ (std::string &buffer, T v)
	Appends the string representation of a numeric value to a buffer, using std::to_chars for allocation-free, locale-independent formatting.
template<typename Lhs_T, typename Rhs_T>
	eq_ (const Lhs_T &, const Rhs_T &) -> eq_< Lhs_T, Rhs_T >
template<typename Lhs_T, typename Rhs_T>
	ge_ (const Lhs_T &, const Rhs_T &) -> ge_< Lhs_T, Rhs_T >
template<class T>
constexpr auto	get (const T &t)
	Generic getter function template for value retrieval.
template<typename Lhs_T, typename Rhs_T>
	gt_ (const Lhs_T &, const Rhs_T &) -> gt_< Lhs_T, Rhs_T >
template<typename Lhs_T, typename Rhs_T>
	le_ (const Lhs_T &, const Rhs_T &) -> le_< Lhs_T, Rhs_T >
template<typename Lhs_T, typename Rhs_T>
	lt_ (const Lhs_T &, const Rhs_T &) -> lt_< Lhs_T, Rhs_T >
template<typename Lhs_T, typename Rhs_T>
	ne_ (const Lhs_T &, const Rhs_T &) -> ne_< Lhs_T, Rhs_T >
template<typename T>
	not_ (const T &) -> not_< T >
template<typename Lhs_T, typename Rhs_T>
	or_ (const Lhs_T &, const Rhs_T &) -> or_< Lhs_T, Rhs_T >
void	register_static_suite (static_runner &static_runner_ref, static_suite &static_suite_ref)
	Registers a static suite with a static runner.
runner &	to_runner (static_runner &static_runner_ref) noexcept
	Converts a static_runner reference to a runner reference.

Variables
constexpr colours	colours_red_green

Detailed Description

The detail namespace encapsulates the internal mechanisms, helper structures, and implementation utilities employed by the µTest++ testing framework. These components do not form part of the public API and may be modified without prior notice.

Within this namespace, one will find assertion handling, generic getter utilities, comparator structures for logical and relational operations, mechanisms for exception checking, and base classes for deferred reporting of test results.

All definitions within detail are intended exclusively for internal use, ensuring a clear distinction between user-facing and internal components. This approach enhances maintainability, mitigates the risk of naming conflicts, and keeps the public API succinct.

The relevant header files are organised within the include/micro-os-plus folder to maintain a structured and modular codebase.

Function Documentation

and_()

template<typename Lhs_T, typename Rhs_T>

micro_os_plus::micro_test_plus::detail::and_	(	const Lhs_T &	,
		const Rhs_T &	) -> and_< Lhs_T, Rhs_T >

append_number_()

template<class T>
requires std::is_arithmetic_v<T>

void micro_os_plus::micro_test_plus::detail::append_number_	(	std::string &	buffer,
		T	v )

Template Parameters

T	The numeric type to format.

Parameters

buffer	The string to append to.
v	The value to format.

Returns

Nothing.

For long double, a platform-specific path is chosen:

• On Windows and on platforms where long double has the same storage width as double (e.g., ARM, RISC-V), the value is cast to double and formatted with std::to_chars.
• On x86-64 Linux/macOS with 80-bit extended precision, snprintf with Lg is used as a portable fallback because std::to_chars for long double may be unavailable when linking with lld.

For all other numeric types, std::to_chars is called directly, providing locale-independent, allocation-free formatting.

Definition at line 654 of file detail-inlines.h.

    {
      char buf[32];
      if constexpr (std::is_same_v<T, long double>)
        {
#if defined(_WIN32) \
    || (defined(__SIZEOF_LONG_DOUBLE__) \
        && __SIZEOF_LONG_DOUBLE__ == __SIZEOF_DOUBLE__)
          // On Windows (all toolchains: MinGW, Clang, MSVC), the C runtime
          // does not handle the %Lg printf specifier correctly for 80-bit
          // long double, producing garbage output. On platforms where long
          // double has the same width as double (ARM, RISC-V), the cast is
          // lossless. In both cases, cast to double and use std::to_chars.
          const auto [ptr, ec] = std::to_chars (buf, buf + sizeof (buf),
                                                static_cast<double> (v));
          if (ec == std::errc{})
            buffer.append (buf, ptr);
#else
          // On x86-64 Linux/macOS with 80-bit extended-precision long double,
          // std::to_chars for long double may be unavailable (e.g., with lld).
          // Use snprintf as a portable fallback; %Lg is supported correctly
          // by glibc and libc++ on these platforms.
          snprintf (buf, sizeof (buf), "%Lg", v);
          buffer.append (buf);
#endif
        }
      else
        {
          const auto [ptr, ec] = std::to_chars (buf, buf + sizeof (buf), v);
          if (ec == std::errc{})
            buffer.append (buf, ptr);
        }
    }

Referenced by micro_os_plus::micro_test_plus::detail::expression_formatter::operator<<(), micro_os_plus::micro_test_plus::detail::expression_formatter::operator<<(), micro_os_plus::micro_test_plus::detail::expression_formatter::operator<<(), micro_os_plus::micro_test_plus::detail::expression_formatter::operator<<(), micro_os_plus::micro_test_plus::detail::expression_formatter::operator<<(), micro_os_plus::micro_test_plus::detail::expression_formatter::operator<<(), micro_os_plus::micro_test_plus::detail::expression_formatter::operator<<(), micro_os_plus::micro_test_plus::detail::expression_formatter::operator<<(), micro_os_plus::micro_test_plus::detail::expression_formatter::operator<<(), micro_os_plus::micro_test_plus::detail::expression_formatter::operator<<(), micro_os_plus::micro_test_plus::detail::expression_formatter::operator<<(), micro_os_plus::micro_test_plus::detail::expression_formatter::operator<<(), micro_os_plus::micro_test_plus::detail::expression_formatter::operator<<(), micro_os_plus::micro_test_plus::detail::expression_formatter::operator<<(), and micro_os_plus::micro_test_plus::reporter::operator<<().

eq_()

template<typename Lhs_T, typename Rhs_T>

micro_os_plus::micro_test_plus::detail::eq_	(	const Lhs_T &	,
		const Rhs_T &	) -> eq_< Lhs_T, Rhs_T >

ge_()

template<typename Lhs_T, typename Rhs_T>

micro_os_plus::micro_test_plus::detail::ge_	(	const Lhs_T &	,
		const Rhs_T &	) -> ge_< Lhs_T, Rhs_T >

get()

template<class T>

auto micro_os_plus::micro_test_plus::detail::get ( const T & t )

nodiscardconstexpr

Template Parameters

T	The type from which the value is to be retrieved.

Parameters

t	The object or value to be accessed.

Returns

The value obtained via the relevant getter implementation.

If the type T provides a get() member function, it is invoked and its result returned. Otherwise the argument itself is returned unchanged. The selection is performed at compile time via if constexpr with an inline requires expression.

Definition at line 82 of file detail-inlines.h.

    {
      if constexpr (requires { t.get (); })
        return t.get ();
      else
        return t;
    }

Referenced by micro_os_plus::micro_test_plus::detail::eq_< Lhs_T, Rhs_T >::eq_(), micro_os_plus::micro_test_plus::detail::ge_< Lhs_T, Rhs_T >::ge_(), micro_os_plus::micro_test_plus::detail::gt_< Lhs_T, Rhs_T >::gt_(), micro_os_plus::micro_test_plus::detail::le_< Lhs_T, Rhs_T >::le_(), micro_os_plus::micro_test_plus::detail::lt_< Lhs_T, Rhs_T >::lt_(), micro_os_plus::micro_test_plus::detail::ne_< Lhs_T, Rhs_T >::ne_(), micro_os_plus::micro_test_plus::detail::binary_op_< Lhs_T, Rhs_T >::lhs(), micro_os_plus::micro_test_plus::detail::unary_op_< T >::operand(), micro_os_plus::micro_test_plus::detail::expression_formatter::operator<<(), and micro_os_plus::micro_test_plus::detail::binary_op_< Lhs_T, Rhs_T >::rhs().

gt_()

template<typename Lhs_T, typename Rhs_T>

micro_os_plus::micro_test_plus::detail::gt_	(	const Lhs_T &	,
		const Rhs_T &	) -> gt_< Lhs_T, Rhs_T >

le_()

template<typename Lhs_T, typename Rhs_T>

micro_os_plus::micro_test_plus::detail::le_	(	const Lhs_T &	,
		const Rhs_T &	) -> le_< Lhs_T, Rhs_T >

lt_()

template<typename Lhs_T, typename Rhs_T>

micro_os_plus::micro_test_plus::detail::lt_	(	const Lhs_T &	,
		const Rhs_T &	) -> lt_< Lhs_T, Rhs_T >

ne_()

template<typename Lhs_T, typename Rhs_T>

micro_os_plus::micro_test_plus::detail::ne_	(	const Lhs_T &	,
		const Rhs_T &	) -> ne_< Lhs_T, Rhs_T >

not_()

template<typename T>

micro_os_plus::micro_test_plus::detail::not_

(

const T &

)

-> not_< T >

or_()

template<typename Lhs_T, typename Rhs_T>

micro_os_plus::micro_test_plus::detail::or_	(	const Lhs_T &	,
		const Rhs_T &	) -> or_< Lhs_T, Rhs_T >

register_static_suite()

void micro_os_plus::micro_test_plus::detail::register_static_suite	(	static_runner &	static_runner_ref,
		static_suite &	static_suite_ref )

This declaration allows test-inlines.h to request registration without requiring the complete static_runner type in that header.

Parameters

static_runner_ref	The destination static runner.
static_suite_ref	The static suite to register.

Performs static-suite registration where static_runner is complete, allowing header-only template code to avoid direct dependence on runner.h include order.

Definition at line 102 of file runner.cpp.

  {
    static_runner::register_static_suite (static_runner_ref, static_suite_ref);
  }

References micro_os_plus::micro_test_plus::static_runner::register_static_suite().

Referenced by micro_os_plus::micro_test_plus::static_suite::static_suite().

to_runner()

runner & micro_os_plus::micro_test_plus::detail::to_runner ( static_runner & static_runner_ref )

noexcept

This declaration breaks the include-order cycle between test and runner headers. The definition is provided in a translation unit where both types are complete, so the conversion remains type-safe.

Parameters

static_runner_ref

The source static_runner reference.

Returns

The same object viewed as its runner base.

Performs the static_runner to runner upcast where both types are complete, allowing headers with only forward declarations to request this conversion safely.

Definition at line 90 of file runner.cpp.

  {
    return static_cast<runner&> (static_runner_ref);
  }

Variable Documentation

colours_red_green

colours micro_os_plus::micro_test_plus::detail::colours_red_green

inlineconstexpr

Initial value:

                                           = {
  "\033[0m", 
  "\033[32m", 
  "\033[31m" 
}

Definition at line 123 of file expression-formatter.h.

                                               {
      "\033[0m", 
      "\033[32m", 
      "\033[31m" 
    };

Referenced by micro_os_plus::micro_test_plus::reporter_human::reporter_human().