[#bsl-bitset-2constructor-07]
= xref:bsl.adoc[bsl]::xref:bsl/bitset.adoc[bitset]::bitset
:relfileprefix: ../../
:mrdocs:

Constructors

== Synopses

Declared in `<bslstl_bitset.h>`

Create a `bitset` with all bits initialized to `0`.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
constexpr
xref:bsl/bitset/2constructor-09.adoc[bitset]() noexcept;
----

[.small]#xref:bsl/bitset/2constructor-09.adoc[_» more..._]#

Create a bitset with its first `M` bit positions correspond to bit values in the specified `val`. `M` is the smaller of the parameterized `N` and `8 * sizeof(unsigned long long)`. If `M < N`, the remaining bit positions are initialized to 0.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
constexpr
xref:bsl/bitset/2constructor-08b.adoc[bitset](unsigned long long val) noexcept;
----

[.small]#xref:bsl/bitset/2constructor-08b.adoc[_» more..._]#

Create a bitset with its first `M` bit positions corresponding to the characters in the specified `pos` of the specified `str`. `M` is the smaller of the parameterized `N` and `str.length()`. If `M < N`, the remaining bit positions are initialized to 0. Characters with the value `zeroChar` correspond to an unset bit and characters with the value `oneChar` correspond to a set bit. The behavior is undefined if the characters in the specified `str` is not the specified `zeroChar` and not the specified `oneChar`.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class CHAR_TYPE,
    class TRAITS,
    class ALLOCATOR>
explicit
xref:bsl/bitset/2constructor-08f.adoc[bitset](
    xref:bsl/basic_string-0faf.adoc[bsl::basic_string<CHAR_TYPE, TRAITS, ALLOCATOR>] const& str,
    bsl::basic_string<CHAR_TYPE, TRAITS, ALLOCATOR>::size_type pos = 0,
    bsl::basic_string<CHAR_TYPE, TRAITS, ALLOCATOR>::size_type n = bsl::basic_string<CHAR_TYPE, TRAITS, ALLOCATOR>::npos,
    CHAR_TYPE zeroChar = CHAR_TYPE('0'),
    CHAR_TYPE oneChar = CHAR_TYPE('1'));
----

[.small]#xref:bsl/bitset/2constructor-08f.adoc[_» more..._]#

Create a bitset with its first `M` bit positions corresponding to the characters in the specified `pos` of the specified `str`. `M` is the smaller of the parameterized `N` and `str.length()`. If `M < N`, the remaining bit positions are initialized to 0. Characters with the value `zeroChar` correspond to an unset bit and characters with the value `oneChar` correspond to a set bit. The behavior is undefined if any characters in `str` is neither the specified `zeroChar` nor the specified `oneChar`.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class CHAR_TYPE,
    class TRAITS,
    class ALLOCATOR>
explicit
xref:bsl/bitset/2constructor-03.adoc[bitset](
    std::basic_string<CHAR_TYPE, TRAITS, ALLOCATOR> const& str,
    std::basic_string<CHAR_TYPE, TRAITS, ALLOCATOR>::size_type pos = 0,
    std::basic_string<CHAR_TYPE, TRAITS, ALLOCATOR>::size_type n = std::basic_string<CHAR_TYPE, TRAITS, ALLOCATOR>::npos,
    CHAR_TYPE zeroChar = CHAR_TYPE('0'),
    CHAR_TYPE oneChar = CHAR_TYPE('1'));
----

[.small]#xref:bsl/bitset/2constructor-03.adoc[_» more..._]#


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