Rose::BitFlags< E, V > Class Template Reference

Description

template<typename E, typename V = int64_t>
class Rose::BitFlags< E, V >

Stores a vector of enum bit flags.

This is a more self-documenting and terse way to use bit flags. For example, consider this original code:

class TableCharacter {
    enum Corner { NONE = 0, LEFT = 1, RIGHT = 2, TOP = 4, BOTTOM = 8 };
 
    unsigned current; // bit vector of Corner flags for current character
    unsigned previous; // bit vector of Corner flags for previous character
 
    TableCharacter(): current(NONE), previous(NONE) {}
 
    void process(unsigned next) { // next is vector of Corner bit flags
        if ((current & LEFT) != 0) {
            previous |= LEFT;
            current &= ~LEFT;
        }
        if ((next & TOP) == 0) {
            current &= ~TOP;
            current |= BOTTOM;
        }
    }
};

Now rewritten to use this class:

class TableCharacter {
    enum Corner { NONE = 0, LEFT = 1, RIGHT = 2, TOP = 4, BOTTOM = 8 };
 
    BitFlags<Corner> current;
    BitFlags<Corner> previous;
 
    TableCharacters(): current(NONE), previous(NONE) {}
 
    void process(BitFlags<Corner> next) {
        if (current.testAndClear(LEFT))
            previous.set(LEFT);
        if (next.isClear(TOP))
            current.clear(TOP).set(BOTTOM);
    }
};

Definition at line 60 of file Rose/BitFlags.h.

#include <Rose/BitFlags.h>

Inheritance diagram for Rose::BitFlags< E, V >:

Collaboration diagram for Rose::BitFlags< E, V >:

Public Types
typedef E	Enum
typedef V	Vector
Public Types inherited from Sawyer::BitFlags< E, V >
typedef E	Enum
typedef V	Vector

Public Member Functions
	BitFlags ()
	Default constructor with all bits clear.
	BitFlags (Vector v)
	Construct bit vector from value or bit.
	BitFlags (Sawyer::BitFlags< E, V > bf)
std::string	toString (std::vector< int64_t > constants, const char *(*stringifier)(int64_t)) const
	Convert to string.
Public Member Functions inherited from Sawyer::BitFlags< E, V >
	BitFlags ()
	Default constructor with all bits clear.
	BitFlags (Vector v)
	Construct bit vector from value or bit.
	BitFlags (E e)
	BitFlags (const BitFlags &other)
	Copy constructor.
Vector	vector () const
	Current value of the bit vector.
bool	isSet (Enum e) const
	Test whether a bit is set.
bool	isAllSet (BitFlags other) const
	True if all specified bits are set.
bool	isAnySet (BitFlags other) const
	True if any of the specified bits are set.
bool	isAnySet () const
	True if any bit is set.
bool	isEmpty () const
	True if no bits are set.
bool	isClear (Enum e) const
	Test whether a bit is clear.
BitFlags &	set (Enum e)
	Set the specified bit.
BitFlags &	set (BitFlags other)
	Set all bits that are set in other.
BitFlags &	clear (Enum e)
	Clear the specified bit.
BitFlags &	clear (BitFlags other)
	Clear all bits that are set in other.
BitFlags &	clear ()
	Clear all bits.
bool	testAndClear (Enum e)
	Test whether a bit is set, then clear it.
bool	testAndSet (Enum e)
	Test whether a bit is set, then set it.
BitFlags &	operator= (Vector v)
	Set the vector to an exact value.
BitFlags &	operator= (BitFlags other)
	Set the vector to the same as another.
std::vector< Enum >	split (std::vector< int64_t > constants, Vector &leftovers) const
	Split a vector into the individual enum values.
std::vector< Enum >	split () const
	Split a vector into the individual bits values.
BitFlags	operator| (BitFlags other) const
	Create a new vector that's the union of two vectors.
BitFlags	operator| (Enum e) const
	Create a new vector that's the union of two vectors.
BitFlags	intersection (BitFlags other) const
	Create a new vector that's the intersection of two vectors.
BitFlags	intersection (Enum e) const
	Create a new vector that's the intersection of two vectors.
BitFlags	operator& (BitFlags other) const
	Create a new vector that's the intersection of two vectors.
BitFlags	operator& (Enum e) const
	Create a new vector that's the intersection of two vectors.
bool	operator== (BitFlags other) const
	Compare two vectors.
bool	operator!= (BitFlags other) const
	Compare two vectors.
bool	operator< (BitFlags other) const
	Compare two vectors.
bool	operator<= (BitFlags other) const
	Compare two vectors.
bool	operator> (BitFlags other) const
	Compare two vectors.
bool	operator>= (BitFlags other) const
	Compare two vectors.

Member Typedef Documentation

Enum

template<typename E , typename V = int64_t>

typedef E Rose::BitFlags< E, V >::Enum

Definition at line 62 of file Rose/BitFlags.h.

Vector

template<typename E , typename V = int64_t>

typedef V Rose::BitFlags< E, V >::Vector

Definition at line 63 of file Rose/BitFlags.h.

Constructor & Destructor Documentation

BitFlags() [1/3]

template<typename E , typename V = int64_t>

Rose::BitFlags< E, V >::BitFlags ( )

inline

Default constructor with all bits clear.

Definition at line 66 of file Rose/BitFlags.h.

BitFlags() [2/3]

template<typename E , typename V = int64_t>

Rose::BitFlags< E, V >::BitFlags ( Vector  v )

inline

Construct bit vector from value or bit.

Definition at line 70 of file Rose/BitFlags.h.

BitFlags() [3/3]

template<typename E , typename V = int64_t>

Rose::BitFlags< E, V >::BitFlags ( Sawyer::BitFlags< E, V >  bf )

inline

Definition at line 73 of file Rose/BitFlags.h.

Member Function Documentation

toString()

template<typename E , typename V = int64_t>

std::string Rose::BitFlags< E, V >::toString ( std::vector< int64_t >  constants, const char *(*)(int64_t)  stringifier  ) const

inline

Convert to string.

Converts a bit vector to a string of the form "NAME1|NAME2|...". The constants are the individual enum flags, and the stringifier is a function that converts each of those constants to strings.

Definition at line 80 of file Rose/BitFlags.h.

References Sawyer::BitFlags< E, V >::split(), and Sawyer::BitFlags< E, V >::vector().

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

• Rose/BitFlags.h