[priqueue.cons]

# 23 Containers library [[containers]](./#containers)

## 23.6 Container adaptors [[container.adaptors]](container.adaptors#priqueue.cons)

### 23.6.4 Class template priority_queue [[priority.queue]](priority.queue#priqueue.cons)

#### 23.6.4.2 Constructors [priqueue.cons]

[🔗](#lib:priority_queue,constructor)

`constexpr priority_queue(const Compare& x, const Container& y);
constexpr priority_queue(const Compare& x, Container&& y);
`

[1](#1)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/containers.tex#L16141)

*Preconditions*: x defines a strict weak ordering ([[alg.sorting]](alg.sorting "26.8 Sorting and related operations"))[.](#1.sentence-1)

[2](#2)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/containers.tex#L16145)

*Effects*: Initializescomp withx andc withy (copy constructing or move constructing as appropriate);
callsmake_heap(c.begin(), c.end(), comp)[.](#2.sentence-1)

[🔗](#lib:priority_queue,constructor_)

`template<class InputIterator>
  constexpr priority_queue(InputIterator first, InputIterator last, const Compare& x = Compare());
`

[3](#3)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/containers.tex#L16163)

*Preconditions*: x defines a strict weak ordering ([[alg.sorting]](alg.sorting "26.8 Sorting and related operations"))[.](#3.sentence-1)

[4](#4)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/containers.tex#L16167)

*Effects*: Initializes c withfirst as the first argument andlast as the second argument, and
initializes comp with x;
then calls make_heap(c.begin(), c.end(), comp)[.](#4.sentence-1)

[🔗](#lib:priority_queue,constructor__)

`template<class InputIterator>
  constexpr priority_queue(InputIterator first, InputIterator last, const Compare& x,
                           const Container& y);
template<class InputIterator>
  constexpr priority_queue(InputIterator first, InputIterator last, const Compare& x,
                           Container&& y);
`

[5](#5)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/containers.tex#L16187)

*Preconditions*: x defines a strict weak ordering ([[alg.sorting]](alg.sorting "26.8 Sorting and related operations"))[.](#5.sentence-1)

[6](#6)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/containers.tex#L16191)

*Effects*: Initializescomp withx andc withy (copy constructing or move constructing as appropriate);
callsc.insert(c.end(), first, last);
and finally callsmake_heap(c.begin(), c.end(), comp)[.](#6.sentence-1)

[🔗](#lib:priority_queue,constructor___)

`template<[container-compatible-range](container.intro.reqmts#concept:container-compatible-range "23.2.2.1 Introduction [container.intro.reqmts]")<T> R>
  constexpr priority_queue(from_range_t, R&& rg, const Compare& x = Compare());
`

[7](#7)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/containers.tex#L16211)

*Preconditions*: x defines a strict weak ordering ([[alg.sorting]](alg.sorting "26.8 Sorting and related operations"))[.](#7.sentence-1)

[8](#8)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/containers.tex#L16215)

*Effects*: Initializes comp with x andc with ranges​::​to<Container>(std​::​forward<R>(rg)) and
finally calls make_heap(c.begin(), c.end(), comp)[.](#8.sentence-1)