[#absl-Condition-2constructor-00]
= xref:absl.adoc[absl]::xref:absl/Condition.adoc[Condition]::Condition
:relfileprefix: ../../
:mrdocs:

Constructors

== Synopses

Declared in `<absl/synchronization/mutex.h>`

Constructs a `Condition` that returns the value of `*cond`.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
explicit
xref:absl/Condition/2constructor-0fb.adoc[Condition](bool const* cond);
----

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Constructs a `Condition` from a functor exposing `bool operator() const`.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<typename T>
requires synchronization_internal::HasConstMemberCallOperator<T>::value
explicit
xref:absl/Condition/2constructor-0b.adoc[Condition](T const* obj);
----

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Constructs a `Condition` from a functor that does not match the `bool operator()() const` signature.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<typename T>
requires !synchronization_internal::HasConstMemberCallOperator<T>::value &&
          sizeof(static_cast<bool (*)(const T&)>(&T::operator())) != 0
explicit
xref:absl/Condition/2constructor-04.adoc[Condition](T const* obj);
----

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Constructs a `Condition` that returns the result of `(*func)(arg)`.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:absl/Condition/2constructor-0f9.adoc[Condition](
    bool(* func)(void*),
    void* arg);
----

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Constructs a `Condition` that evaluates `object‐>method()`.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<typename T>
xref:absl/Condition/2constructor-0ef.adoc[Condition](
    T* object,
    bool(T::* method)());
----

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Constructs a `Condition` that evaluates a const member function.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<typename T>
xref:absl/Condition/2constructor-0d.adoc[Condition](
    T const* object,
    bool const(T::* method)());
----

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Constructs a `Condition` from a typed function pointer and argument.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<typename T>
xref:absl/Condition/2constructor-02.adoc[Condition](
    bool(* func)(T*),
    T* arg);
----

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Constructs a `Condition` allowing `arg` to be implicitly convertible to the function parameter type.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    typename T,
    typename = void>
xref:absl/Condition/2constructor-0ec.adoc[Condition](
    bool(* func)(T*),
    T* arg);
----

[.small]#xref:absl/Condition/2constructor-0ec.adoc[_» more..._]#

== Parameters

[cols="1,4"]
|===
| Name| Description
| *cond*
| Pointer to the boolean to read.
| *obj*
| The functor to evaluate.
| *func*
| The predicate function to evaluate.
| *arg*
| The argument passed to `func`.
| *object*
| The object on which to invoke the method.
| *method*
| The member function to evaluate.
|===


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