"Implementation Fixes"

Fixes to features in std. More...

Files
file	string_helpers.hpp
	Implementation of global string accessors for C++.This header adds global functions to access the functionality of the following std::string and sibling members:

Namespaces
	cxxomfort::fix
	Fixes for implementation issues in std.

Classes
struct	integral_limits< T >
	An extension to numeric_limits that deals specifically with integer-like types. More...
struct	malloc_deleter
	Deleter operator that uses free() for malloc-reserved blocks. More...
struct	shuffle_order_engine< Engine, K >
	Forwarder for std::shuffle_order_engine. More...
class	errc
	Aliases a broken std::errc implementation (as a namespace rather than as a type) in MSVC 2010. More...

Typedefs
typedef shuffle_order_engine< minstd_rand, 256 >	knuth_b
	Forwarder for the std::knuth_b specialization of shuffle_order_engine .

Functions
template<typename Integral >
	to_byte (Integral i) CXXO_NOEXCEPTNOTHROW
	Creates a std::byte value given a numerical octet value. More...
template<typename T >
auto	cdata (C const &container) -> decltype(container.data())
	Returns container.data() as a const-pointer for a given container. More...
template<typename T >
bool	to_bool (std::shared_ptr< T > const &p) noexcept
template<typename T >
bool	to_bool (std::unique_ptr< T > const &p) noexcept
static int	randmo (int mo) CXXO_NOEXCEPTNOTHROW
	Invokes rand and rids of some of the bias from the modulo. More...
static CXXO_CONSTEXPR errc	to_errc (int E)
	Creates a value of type errc given a numeric error code.

Detailed Description

Fixes to features in std.

Some features in namespace std are implemented with issues or in unusable fashion in some compilers, and as such cxxomfort can not reuse the names to provide fixed versions.

To deal with this, namespace cxxomfort::fix offers a number of alternatives or "forwarders" for the features in namespace std. These names either redirect to the std one if it's working, or to an implementation in cxxomfort when they are not.

Examples of features here:

• s("text") to construct basic_string s.
• sv"text") to construct basic_string_view s.
• to_byte() - Allows std::byte construction pre-C++14 where uniform initialization for enum classes without constructors is not available.
• to_bool() for smart pointers to check their managed status.
• to_value() for integral_constant for versions of C++ where the integral conversion operator is not available.
• to_errc() - Allows std::errc code construction from integers pre-C++14.
• cxxomfort::fix::common_type - Bypasses incorrect implementation in MSVC 2010 where it misses out variadic support and some specific decay case conventions.
• cxxomfort::fix::errc - Bypasses incorrect std::errc definition in MSVC versions due to it being declared there as a namespace.
• cxxomfort::fix::hash hash<> - An extended, extensible version of std::hash from <functional> that forwards to the std one but also can beb specialized for families ot types.
• randmo(uint) - Obtains a "random" number the same way as rand does, except it discards some bias.

Function Documentation

to_byte()

cxxomfort::fix::to_byte ( Integral  i )

inline

Creates a std::byte value given a numerical octet value.

Returns

A std::byte value .

See also

std::byte

See std::byte for more information.

Referenced by cxxomfort::cxxostd::operator!=().

cdata()

auto cxxomfort::fix::cdata

(

C const &

container

)

-> decltype(container.data())

Returns container.data() as a const-pointer for a given container.

Parameters

container

A container or expression representing one.

Returns

An iterator of the type of container.data(); pre-C++11, a Container::const_pointer .

Precondition

The argument implements the .data() member with the required semantics (contiguous storage).

to_bool() [1/2]

bool cxxomfort::fix::to_bool ( std::shared_ptr< T > const &  p )

inlinenoexcept

Returns true if the shared_ptr currently hosts a value.

to_bool() [2/2]

bool cxxomfort::fix::to_bool ( std::unique_ptr< T > const &  p )

inlinenoexcept

Returns true if the unique_ptr currently hosts a value.

randmo()

static int cxxomfort::fix::randmo ( int  mo )

inlinestatic

Invokes rand and rids of some of the bias from the modulo.

Parameters

mo	An integer.

Returns

An integer in the range [0, mo).

Exceptions

None.