boost::operator‐ :: Boost.DynamicBitset

# boost::operator‐

Calculates the set difference of two bitsets.

## Synopses

Declared in `<boost/dynamic_bitset/dynamic_bitset.hpp>`

    difference_type
    operator‐(
        bit_iterator_base<Iter> const& lhs,
        bit_iterator_base<Iter> const& rhs);

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Calculates the set difference of two bitsets.

    template<
        typename Block,
        typename AllocatorOrContainer>
    dynamic_bitset<Block, AllocatorOrContainer>
    operator‐(
        dynamic_bitset<Block, AllocatorOrContainer> const& a,
        dynamic_bitset<Block, AllocatorOrContainer> const& b);

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## Return Value

A new bitset which is the set difference of the bitsets `a` and `b`.

## Preconditions

- `a.size() == b.size()`.

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