limits.hpp File Reference

Classes
struct	integral_limits< T >
	An extension to numeric_limits that deals specifically with integer-like types. More...

Namespaces
	cxxomfort
	Namespace of the cxxomfort library.
	cxxomfort::fix
	Fixes for implementation issues in std.

Detailed Description

Author

Luis Machuca Bezzaza <luis [dot] machuca [at] gulix [dot] cl>

Interfaces defined in this header:

• cxxomfort::integral_limits

---

Class Documentation

cxxomfort::fix::integral_limits

struct cxxomfort::fix::integral_limits

template<typename T>
struct cxxomfort::fix::integral_limits< T >

An extension to numeric_limits that deals specifically with integer-like types.

Compile-time constants for integral limits

For a given integral or integer-like type Ty , integral_limits<Ty> provides an interface to std::numeric_limits<Ty> and in fact inherits from the latter. The interface is expanded to add some useful information about the integral type that is only available at compile time as macros pre-C++11.

integral_limits provides the following new members:

• const_min - minimum value as a value (min is constexpr function in C++>=11).
• const_max - maximum value as a value (max is constexpr function in C++>=11).
• digits_base<N> - the total number of digits required to represent any value in the given base.

Pending members :

• narrower_type - an alias to the next smaller integral type of the same signedness.
• wider_type - an alias to the next larger integral type of the same signedness.
• lo_mask - an integral value that can be AND-ed with this type to keep only the lower bits.
• hi_mask - an integral value that can be AND-ed with this type to keep only the higher bits.

cxxomfort provides specializations of the new integral_limits for all the types that are defined as integral. The list explicitly includes:

short, int, long, long long in their signed and unsigned variants.