This class exists only as a helper class for dynamic_bitset's operator[]. The following list describes the valid operations on the reference type. Assume that b is an instance of dynamic_bitset, i, j are of size_type and in the range [0, b.size()). Also, note that when we write b[ i ] we mean an object of type reference that was initialized from b[ i ]. The variable x is a bool.

‐ (bool)b[ i ]

Returns the i‐th bit of b.

‐ (bool)~ b[ i ]

Returns the opposite of the i‐th bit of b.

‐ b[ i ].flip()

Flips the i‐th bit of b and returns b[ i ].

‐ x = b[ i ]

Assigns the i‐th bit of b to x.

‐ b[ i ] = x

Sets the i‐th bit of b to the value of x and returns b[ i ].

‐ b[ i ] = b[ j ]

Sets the i‐th bit of b to the value of the j‐th bit of b and returns b[ i ].

‐ b[ i ] |= x

Does an OR of the i‐th bit of b with the value of x and returns b[ i ].

‐ b[ i ] &= x

Does an AND of the i‐th bit of b with the value of x and returns b[ i ].

‐ b[ i ] ˆ= x

Does a XOR of the i‐th bit of b with the value of x and returns b[ i ].

‐ b[ i ] ‐= x

If x is true, clears the i‐th bit of b. Returns b[ i ].

‐ b[ i ] |= b[ j ]

Does an OR of the i‐th bit of b with the j‐th bit of b and returns b[ i ].

‐ b[ i ] &= b[ j ]

Does an AND of the i‐th bit of b with the j‐th bit of b and returns b[ i ].

‐ b[ i ] ˆ= b[ j ]

Does a XOR of the i‐th bit of b with the j‐th bit of b and returns b[ i ].

‐ b[ i ] ‐= b[ j ]

If the j‐th bit of b is set, clears the i‐th bit of b. Returns b[ i ].

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