Namespace for various utility classes and/or functions used by COMMS library. More...

Detailed Description

Namespace for various utility classes and/or functions used by COMMS library.

Namespaces
	alloc
	Namespace for various allocation classes.

	detect
	Namespace for various compile-time detection operations of whether a type has certain member types and/or member functions.

	traits
	Namespace for various utilities related trait classes.

Classes
class	ArrayView
	Describes an object that can refer to a constant contiguous sequence of other objects. More...

struct	Conditional
	Replacement to std::conditional. More...

struct	IsInTuple
	Check whether TType type is included in the tuple TTuple. More...

struct	IsTuple
	Check whether provided type is a variant of std::tuple. More...

class	ScopeGuard
	Implements Scope Guard Idiom. More...

class	StaticString
	Replacement to std::string when no dynamic memory allocation is allowed. More...

class	StaticVector
	Replacement to std::vector when no dynamic memory allocation is allowed. More...

class	StringView
	Describes an object that can refer to a constant contiguous sequence of char-like objects with the first element of the sequence at position zero. More...

struct	TupleAsAlignedUnion
	Calculated "aligned union" storage type for all the types in provided tuple. More...

struct	TupleCat
	Provides the type of std::tuple_cat operation. More...

Typedefs
template<bool TCond, typename TTrue , typename TFalse >
using	ConditionalT = typename Conditional< TCond >::template Type< TTrue, TFalse >
	Replacement to std::conditional.

template<typename TTuple >
using	TupleAsAlignedUnionT = typename TupleAsAlignedUnion< TTuple >::Type
	Alias to TupleAsAlignedUnion::Type.

Functions
template<typename T , typename TIter >
void	assign (T &obj, TIter from, TIter to)
	Assigns a new value to provided object. More...

template<typename TType >
constexpr bool	isTuple ()
	Check whether provided type is a variant of std::tuple. More...

template<typename T , std::size_t TSize, typename TIter >
T	readBig (TIter &iter)
	Read part of integral value from the input area using big endian notation. More...

template<typename T , typename TIter >
T	readBig (TIter &iter)
	Read integral value from the input area using big endian notation. More...

template<typename T , typename TIter >
T	readBig (TIter &iter, std::size_t size)
	Read integral value from the input area using big endian notation. More...

template<typename T , typename TIter >
T	readData (TIter &iter, const traits::endian::Big &endian)
	Same as readBig<T, TIter>()

template<typename T , std::size_t TSize, typename TIter >
T	readData (TIter &iter, const traits::endian::Big &endian)
	Same as readBig<T, TSize, TIter>()

template<typename T , typename TIter >
T	readData (TIter &iter, const traits::endian::Little &endian)
	Same as readLittle<T, TIter>()

template<typename T , std::size_t TSize, typename TIter >
T	readData (TIter &iter, const traits::endian::Little &endian)
	Same as readData<T, TSize, TIter>()

template<typename T , typename TIter >
T	readData (TIter &iter, std::size_t size, const traits::endian::Big &endian)
	Same as readBig<T, TIter>()

template<typename T , typename TIter >
T	readData (TIter &iter, std::size_t size, const traits::endian::Little &endian)
	Same as readBig<T, TIter>()

template<typename T , std::size_t TSize, typename TIter >
T	readLittle (TIter &iter)
	Read part of integral value from the input area using little endian notation. More...

template<typename T , typename TIter >
T	readLittle (TIter &iter)
	Read integral value from the input area using little endian notation. More...

template<typename T , typename TIter >
T	readLittle (TIter &iter, std::size_t size)
	Read integral value from the input area using little endian notation. More...

template<typename TTuple , typename TValue , typename TFunc >
constexpr TValue	tupleAccumulate (TTuple &&tuple, const TValue &value, TFunc &&func)
	Performs "accumulate" algorithm on every element of the tuple. More...

template<std::size_t TFrom, std::size_t TUntil, typename TTuple , typename TValue , typename TFunc >
constexpr TValue	tupleAccumulateFromUntil (TTuple &&tuple, const TValue &value, TFunc &&func)
	Performs "accumulate" algorithm on every element of the tuple. More...

template<typename TTuple , typename TFunc >
void	tupleForEach (TTuple &&tuple, TFunc &&func)
	Invoke provided functor for every element in the tuple. More...

template<std::size_t TIdx, typename TTuple , typename TFunc >
void	tupleForEachFrom (TTuple &&tuple, TFunc &&func)
	Invoke provided functor for every element in the tuple starting from element with specified index. More...

template<std::size_t TFromIdx, std::size_t TUntilIdx, typename TTuple , typename TFunc >
void	tupleForEachFromUntil (TTuple &&tuple, TFunc &&func)
	Invoke provided functor for every element in the tuple which indices are in range [TFromIdx, TUntilIdx). More...

template<typename TTuple , typename TFunc >
void	tupleForEachType (TFunc &&func)
	Invoke provided functor for every type in the tuple. More...

template<std::size_t TIdx, typename TTuple , typename TFunc >
void	tupleForEachUntil (TTuple &&tuple, TFunc &&func)
	Invoke provided functor for every element in the tuple until element with specified index is reached. More...

template<typename TTuple , typename TFunc >
void	tupleForEachWithIdx (TTuple &&tuple, TFunc &&func)
	Invoke provided functor for every element in the tuple while providing information about element index in the tuple. More...

template<typename TTuple , typename TFunc >
void	tupleForEachWithTemplateParamIdx (TTuple &&tuple, TFunc &&func)
	Invoke provided functor for every element in the tuple while providing information about element index in the tuple as a template parameter. More...

template<typename TTuple , typename TFunc >
void	tupleForSelectedType (std::size_t idx, TFunc &&func)
	Invoke provided functor for a selected type when element index is known only at run time. More...

template<typename TTail , typename TTuple >
constexpr bool	tupleIsTailOf ()
	Compile time check of whether one tuple is a "tail" of another. More...

template<typename TTuple , typename TValue , typename TFunc >
constexpr TValue	tupleTypeAccumulate (const TValue &value, TFunc &&func)
	Performs "accumulate" algorithm on every type of the tuple. More...

template<std::size_t TFrom, std::size_t TUntil, typename TTuple , typename TValue , typename TFunc >
constexpr TValue	tupleTypeAccumulateFromUntil (const TValue &value, TFunc &&func)
	Performs "accumulate" algorithm on specified types inside the tuple. More...

template<typename TTuple , typename TFunc >
constexpr bool	tupleTypeIsAnyOf (TFunc &&func)
	Compile time check of whether any type within a tuple has a certain condition. More...

template<typename T , typename TIter >
void	writeBig (T value, std::size_t size, TIter &iter)
	Write part of integral value into the output area using big endian notation. More...

template<std::size_t TSize, typename T , typename TIter >
void	writeBig (T value, TIter &iter)
	Write part of integral value into the output area using big endian notation. More...

template<typename T , typename TIter >
void	writeBig (T value, TIter &iter)
	Write integral value into the output area using big endian notation. More...

template<typename T , typename TIter >
void	writeData (T value, std::size_t size, TIter &iter, const traits::endian::Big &endian)
	Same as writeBig<T, TIter>()

template<typename T , typename TIter >
void	writeData (T value, std::size_t size, TIter &iter, const traits::endian::Little &endian)
	Same as writeLittle<T, TIter>()

template<typename T , typename TIter >
void	writeData (T value, TIter &iter, const traits::endian::Big &endian)
	Same as writeBig<T, TIter>()

template<std::size_t TSize, typename T , typename TIter >
void	writeData (T value, TIter &iter, const traits::endian::Big &endian)
	Same as writeBig<TSize, T, TIter>()

template<typename T , typename TIter >
void	writeData (T value, TIter &iter, const traits::endian::Little &endian)
	Same as writeLittle<T, TIter>()

template<std::size_t TSize, typename T , typename TIter >
void	writeData (T value, TIter &iter, const traits::endian::Little &endian)
	Same as writeLittle<TSize, T, TIter>()

template<typename T , typename TIter >
void	writeLittle (T value, std::size_t size, TIter &iter)
	Write part of integral value into the output area using little endian notation. More...

template<std::size_t TSize, typename T , typename TIter >
void	writeLittle (T value, TIter &iter)
	Write part of integral value into the output area using little endian notation. More...

template<typename T , typename TIter >
void	writeLittle (T value, TIter &iter)
	Write integral value into the output area using big endian notation. More...

Function Documentation

◆ assign()

template<typename T , typename TIter >

void comms::util::assign	(	T &	obj,
		TIter	from,
		TIter	to
	)

Assigns a new value to provided object.

The function detects at compile-time presence of assign() member function and uses it. In case the assign() member function does not exist (for types like std::string_view or std::span) the function checks for presence of a constructor that can receive a pointer to the first element + number of elements (size) and uses it instead to create temporary object and then uses move / copy constructor to assign the value.

static const std::string Str("hello");
 
std::string s1;
comms::util::assign(s1, Str.begin(), Str.end()) // <-- equivalent to s1.assign(Str.begin(), Str.end());
 
std::string_view s2;
comms::util::assign(s2, Str.begin(), Str.end()) // <-- equivalent to s2 = std::string_view(&(*Str.begin()), std::distance(Str.begin(), Str.end()));

◆ isTuple()

template<typename TType >

constexpr bool comms::util::isTuple ( )

constexpr

Check whether provided type is a variant of std::tuple.

Template Parameters

TType Type to check.

◆ readBig() [1/3]

template<typename T , std::size_t TSize, typename TIter >

T comms::util::readBig ( TIter & iter )

Read part of integral value from the input area using big endian notation.

Template Parameters

T	Type to read.
TSize	Number of bytes to read.

Parameters

[in,out] iter Input iterator.

Returns: Read value

Precondition: TSize <= sizeof(T).; The iterator must be valid and can be successfully dereferenced and incremented at least TSize times.

Postcondition: The iterator is advanced.

◆ readBig() [2/3]

template<typename T , typename TIter >

T comms::util::readBig ( TIter & iter )

Read integral value from the input area using big endian notation.

Template Parameters

T	Type to read.

Parameters

[in,out] iter Input iterator.

Returns: Read value

Precondition: The iterator must be valid and can be successfully dereferenced and incremented at least sizeof(T) times.

Postcondition: The iterator is advanced.

◆ readBig() [3/3]

template<typename T , typename TIter >

T comms::util::readBig	(	TIter &	iter,
		std::size_t	size
	)

Read integral value from the input area using big endian notation.

Template Parameters

T	Type to read.

Parameters

[in,out]	iter	Input iterator.
[in]	size	length to read

Returns: Read value

Precondition: The iterator must be valid and can be successfully dereferenced and incremented at least sizeof(T) times.

Postcondition: The iterator is advanced.

◆ readLittle() [1/3]

template<typename T , std::size_t TSize, typename TIter >

T comms::util::readLittle ( TIter & iter )

Read part of integral value from the input area using little endian notation.

Template Parameters

T	Type to read.
TSize	Number of bytes to read.

Parameters

[in,out] iter Input iterator.

Returns: Read value

Precondition: TSize <= sizeof(T).; The iterator must be valid and can be successfully dereferenced and incremented at least TSize times.

Postcondition: The iterator is advanced.

◆ readLittle() [2/3]

template<typename T , typename TIter >

T comms::util::readLittle ( TIter & iter )

Read integral value from the input area using little endian notation.

Template Parameters

T	Type to read.

Parameters

[in,out] iter Input iterator.

Returns: Read value

Precondition: The iterator must be valid and can be successfully dereferenced and incremented at least sizeof(T) times.

Postcondition: The iterator is advanced.

◆ readLittle() [3/3]

template<typename T , typename TIter >

T comms::util::readLittle	(	TIter &	iter,
		std::size_t	size
	)

Read integral value from the input area using little endian notation.

Template Parameters

T	Type to read.

Parameters

[in,out]	iter	Input iterator.
[in]	size	length to read

Returns: Read value

Precondition: The iterator must be valid and can be successfully dereferenced and incremented at least sizeof(T) times.

Postcondition: The iterator is advanced.

◆ tupleAccumulate()

template<typename TTuple , typename TValue , typename TFunc >

constexpr TValue comms::util::tupleAccumulate	(	TTuple &&	tuple,
		const TValue &	value,
		TFunc &&	func
	)

constexpr

Performs "accumulate" algorithm on every element of the tuple.

The algorithm invokes operator() of the provided functor object with initial value and first element of the tuple, then provides the returned value as a parameter to the next invocation of operator() and second element in the tuple, and so on until all elements in the tuple is handled.

Parameters

[in]	tuple	Reference (l- or r-value) to tuple object.
[in]	value	Initial value.
[in]	func	Functor object. The class must provide operator() with the following signature: struct MyFunc { template <typename TValue, typename TTupleElem> TValue operator()(const TValue& value, TTupleElem&& elem) {...} };

Returns: Returns the result of the last invocation of the functor's operator().

◆ tupleAccumulateFromUntil()

template<std::size_t TFrom, std::size_t TUntil, typename TTuple , typename TValue , typename TFunc >

constexpr TValue comms::util::tupleAccumulateFromUntil	(	TTuple &&	tuple,
		const TValue &	value,
		TFunc &&	func
	)

constexpr

Performs "accumulate" algorithm on every element of the tuple.

Similar to tupleAccumulate(), but allows specifying range of indices of tuple elements.

Template Parameters

TFrom	Index of the first tuple element to evaluate
TUntil	Index of the one past the last tuple element to evaluate.

Parameters

[in]	tuple	Reference (l- or r-value) to tuple object.
[in]	value	Initial value.
[in]	func	Functor object. The class must provide operator() with the following signature: struct MyFunc { template <typename TValue, typename TTupleElem> TValue operator()(const TValue& value, TTupleElem&& elem) {...} };

Returns: Returns the result of the last invocation of the functor's operator().

◆ tupleForEach()

template<typename TTuple , typename TFunc >

void comms::util::tupleForEach	(	TTuple &&	tuple,
		TFunc &&	func
	)

Invoke provided functor for every element in the tuple.

The functor object class must define operator() with following signature:

struct MyFunc
{
    template <typename TTupleElem>
    void operator()(TTupleElem&& elem) {...}
};

Parameters

[in]	tuple	Reference (l- or r-value) to tuple object.
[in]	func	Functor object.

◆ tupleForEachFrom()

template<std::size_t TIdx, typename TTuple , typename TFunc >

void comms::util::tupleForEachFrom	(	TTuple &&	tuple,
		TFunc &&	func
	)

Invoke provided functor for every element in the tuple starting from element with specified index.

Very similar to tupleForEach() function, but also receives index of the first element as a template parameter.

Template Parameters

TIdx	Index of the first element to invoke functor on.

Parameters

[in]	tuple	Reference (l- or r-value) to tuple object.
[in]	func	Functor object.

Precondition: TIdx must be less than number of elements in the tuple.

◆ tupleForEachFromUntil()

template<std::size_t TFromIdx, std::size_t TUntilIdx, typename TTuple , typename TFunc >

void comms::util::tupleForEachFromUntil	(	TTuple &&	tuple,
		TFunc &&	func
	)

Invoke provided functor for every element in the tuple which indices are in range [TFromIdx, TUntilIdx).

Very similar to tupleForEach() function, but also receives indices of the first and last elements as a template parameters.

Template Parameters

TFromIdx	Index of the first element to invoke functor on.
TUntilIdx	Index of the last (not included) element.

Parameters

[in]	tuple	Reference (l- or r-value) to tuple object.
[in]	func	Functor object.

Precondition: TFromIdx must be less than number of elements in the tuple.; TUntilIdx mustn't exceed number of elements in the tuple.; TFormIdx <= TUntilIdx

◆ tupleForEachType()

template<typename TTuple , typename TFunc >

void comms::util::tupleForEachType ( TFunc && func )

Invoke provided functor for every type in the tuple.

The functor object class must define operator() with following signature:

struct MyFunc
{
    template <typename TTupleElem>
    void operator()() {...}
};

Parameters

[in] func Functor object.

◆ tupleForEachUntil()

template<std::size_t TIdx, typename TTuple , typename TFunc >

void comms::util::tupleForEachUntil	(	TTuple &&	tuple,
		TFunc &&	func
	)

Invoke provided functor for every element in the tuple until element with specified index is reached.

Very similar to tupleForEach() function, but also receives index of the last element as a template parameter. The provided functor is NOT invoked for the element with index TIdx.

Template Parameters

TIdx	Index of the last (not included) element.

Parameters

[in]	tuple	Reference (l- or r-value) to tuple object.
[in]	func	Functor object.

Precondition: TIdx mustn't exceed number of elements in the tuple.

◆ tupleForEachWithIdx()

template<typename TTuple , typename TFunc >

void comms::util::tupleForEachWithIdx	(	TTuple &&	tuple,
		TFunc &&	func
	)

Invoke provided functor for every element in the tuple while providing information about element index in the tuple.

Very similar to tupleForEach(), but the operator() in the functor receives additional information about index of the element. The functor object class must define operator() with following signature:

struct MyFunc
{
    template <typename TTupleElem>
    void operator()(TTupleElem&& elem, std::size_t idx) {...}
};

Parameters

[in]	tuple	Reference (l- or r-value) to tuple object.
[in]	func	Functor object.

◆ tupleForEachWithTemplateParamIdx()

template<typename TTuple , typename TFunc >

void comms::util::tupleForEachWithTemplateParamIdx	(	TTuple &&	tuple,
		TFunc &&	func
	)

Invoke provided functor for every element in the tuple while providing information about element index in the tuple as a template parameter.

Very similar to tupleForEachWithIdx(), but the operator() in the functor receives additional information about index of the element as a template parameter instead of as argument to the function. The functor object class must define operator() with following signature:

struct MyFunc
{
    template <std::size_t TIdx, typename TTupleElem>
    void operator()(TTupleElem&& elem) {...}
};

Parameters

[in]	tuple	Reference (l- or r-value) to tuple object.
[in]	func	Functor object.

◆ tupleForSelectedType()

template<typename TTuple , typename TFunc >

void comms::util::tupleForSelectedType	(	std::size_t	idx,
		TFunc &&	func
	)

Invoke provided functor for a selected type when element index is known only at run time.

The functor object class must define operator() with following signature:

struct MyFunc
{
    // TIdx - index of the type inside the tuple
    // TTupleElem - type inside the tuple
    template <std::size_t TIdx, typename TTupleElem>
    void operator()() {...}
};

Parameters

[in]	idx	Index of the type in the tuple
[in]	func	Functor object.

◆ tupleIsTailOf()

template<typename TTail , typename TTuple >

constexpr bool comms::util::tupleIsTailOf ( )

constexpr

Compile time check of whether one tuple is a "tail" of another.

Template Parameters

TTail	Tail tuple
TTuple	Containing tuple

◆ tupleTypeAccumulate()

template<typename TTuple , typename TValue , typename TFunc >

constexpr TValue comms::util::tupleTypeAccumulate	(	const TValue &	value,
		TFunc &&	func
	)

constexpr

Performs "accumulate" algorithm on every type of the tuple.

Very similar to tupleAccumulate(), but without actual tuple object, provides only type information to operator() of the functor.

Parameters

[in]	value	Initial value.
[in]	func	Functor object. The class must provide operator() with the following signature: struct MyFunc { template <typename TTupleElem, typename TValue> TValue operator()(const TValue& value) {...} };

Returns: Returns the result of the last invocation of the functor's operator().

◆ tupleTypeAccumulateFromUntil()

template<std::size_t TFrom, std::size_t TUntil, typename TTuple , typename TValue , typename TFunc >

constexpr TValue comms::util::tupleTypeAccumulateFromUntil	(	const TValue &	value,
		TFunc &&	func
	)

constexpr

Performs "accumulate" algorithm on specified types inside the tuple.

Very similar to tupleTypeAccumulate(), but allows specifying range of indices of tuple elements.

Template Parameters

TFrom	Index of the first tuple type to evaluate
TUntil	Index of the one past the last tuple type to evaluate.

Parameters

[in]	value	Initial value.
[in]	func	Functor object. The class must provide operator() with the following signature: struct MyFunc { template <typename TTupleElem, typename TValue> TValue operator()(const TValue& value) {...} };

Returns: Returns the result of the last invocation of the functor's operator().

◆ tupleTypeIsAnyOf()

template<typename TTuple , typename TFunc >

constexpr bool comms::util::tupleTypeIsAnyOf ( TFunc && func )

constexpr

Compile time check of whether any type within a tuple has a certain condition.

The functor object class must define operator() with following signature:

struct MyFunc
{
    // TTupleElem - type inside the tuple
    template <typename TTupleElem>
    constexpr bool operator()() const {...}
};

Template Parameters

TTuple	Tuple
TFunc	Functor object type

◆ writeBig() [1/3]

template<typename T , typename TIter >

void comms::util::writeBig	(	T	value,
		std::size_t	size,
		TIter &	iter
	)

Write part of integral value into the output area using big endian notation.

Parameters

[in]	value	Integral type value to be written.
[in]	size	Number of bytes to write.
[in,out]	iter	Output iterator.

Precondition: TSize <= sizeof(T).; The iterator must be valid and can be successfully dereferenced and incremented at least TSize times.

Postcondition: The iterator is advanced.

◆ writeBig() [2/3]

template<std::size_t TSize, typename T , typename TIter >

void comms::util::writeBig	(	T	value,
		TIter &	iter
	)

Write part of integral value into the output area using big endian notation.

Template Parameters

TSize Number of bytes to write.

Parameters

[in]	value	Integral type value to be written.
[in,out]	iter	Output iterator.

Precondition: TSize <= sizeof(T).; The iterator must be valid and can be successfully dereferenced and incremented at least TSize times.

Postcondition: The iterator is advanced.

◆ writeBig() [3/3]

template<typename T , typename TIter >

void comms::util::writeBig	(	T	value,
		TIter &	iter
	)

Write integral value into the output area using big endian notation.

Parameters

[in]	value	Integral type value to be written.
[in,out]	iter	Output iterator.

Precondition: The iterator must be valid and can be successfully dereferenced and incremented at least sizeof(T) times.

Postcondition: The iterator is advanced.

◆ writeLittle() [1/3]

template<typename T , typename TIter >

void comms::util::writeLittle	(	T	value,
		std::size_t	size,
		TIter &	iter
	)

Write part of integral value into the output area using little endian notation.

Parameters

[in]	value	Integral type value to be written.
[in]	size	Number of bytes to write.
[in,out]	iter	Output iterator.

Precondition: TSize <= sizeof(T).; The iterator must be valid and can be successfully dereferenced and incremented at least TSize times.

Postcondition: The iterator is advanced.

◆ writeLittle() [2/3]

template<std::size_t TSize, typename T , typename TIter >

void comms::util::writeLittle	(	T	value,
		TIter &	iter
	)

Write part of integral value into the output area using little endian notation.

Template Parameters

TSize Number of bytes to write.

Parameters

[in]	value	Integral type value to be written.
[in,out]	iter	Output iterator.

Precondition: TSize <= sizeof(T).; The iterator must be valid and can be successfully dereferenced and incremented at least TSize times.

Postcondition: The iterator is advanced.

◆ writeLittle() [3/3]

template<typename T , typename TIter >

void comms::util::writeLittle	(	T	value,
		TIter &	iter
	)

Write integral value into the output area using big endian notation.

Parameters

[in]	value	Integral type value to be written.
[in,out]	iter	Output iterator.

Precondition: The iterator must be valid and can be successfully dereferenced and incremented at least sizeof(T) times.

Postcondition: The iterator is advanced.

Detailed Description

Namespaces

Classes

Typedefs

Functions

Function Documentation

◆ assign()

◆ isTuple()

◆ readBig() [1/3]

◆ readBig() [2/3]

◆ readBig() [3/3]

◆ readLittle() [1/3]

◆ readLittle() [2/3]

◆ readLittle() [3/3]

◆ tupleAccumulate()

◆ tupleAccumulateFromUntil()

◆ tupleForEach()

◆ tupleForEachFrom()

◆ tupleForEachFromUntil()

◆ tupleForEachType()

◆ tupleForEachUntil()

◆ tupleForEachWithIdx()

◆ tupleForEachWithTemplateParamIdx()

◆ tupleForSelectedType()

◆ tupleIsTailOf()

◆ tupleTypeAccumulate()

◆ tupleTypeAccumulateFromUntil()

◆ tupleTypeIsAnyOf()

◆ writeBig() [1/3]

◆ writeBig() [2/3]

◆ writeBig() [3/3]

◆ writeLittle() [1/3]

◆ writeLittle() [2/3]

◆ writeLittle() [3/3]