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+[deque.cons]
+
+# 23 Containers library [[containers]](./#containers)
+
+## 23.3 Sequence containers [[sequences]](sequences#deque.cons)
+
+### 23.3.5 Class template deque [[deque]](deque#cons)
+
+#### 23.3.5.2 Constructors, copy, and assignment [deque.cons]
+
+[ð](#lib:deque,constructor)
+
+`constexpr explicit deque(const Allocator&);
+`
+
+[1](#1)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/containers.tex#L6624)
+
+*Effects*: Constructs an emptydeque,
+using the specified allocator[.](#1.sentence-1)
+
+[2](#2)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/containers.tex#L6630)
+
+*Complexity*: Constant[.](#2.sentence-1)
+
+[ð](#lib:deque,constructor_)
+
+`constexpr explicit deque(size_type n, const Allocator& = Allocator());
+`
+
+[3](#3)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/containers.tex#L6641)
+
+*Preconditions*: T is *Cpp17DefaultInsertable* into deque[.](#3.sentence-1)
+
+[4](#4)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/containers.tex#L6645)
+
+*Effects*: Constructs a deque withn default-inserted elements using the specified allocator[.](#4.sentence-1)
+
+[5](#5)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/containers.tex#L6650)
+
+*Complexity*: Linear in n[.](#5.sentence-1)
+
+[ð](#lib:deque,constructor__)
+
+`constexpr deque(size_type n, const T& value, const Allocator& = Allocator());
+`
+
+[6](#6)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/containers.tex#L6661)
+
+*Preconditions*: T is *Cpp17CopyInsertable* into deque[.](#6.sentence-1)
+
+[7](#7)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/containers.tex#L6665)
+
+*Effects*: Constructs adeque with n copies of value,
+using the specified allocator[.](#7.sentence-1)
+
+[8](#8)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/containers.tex#L6672)
+
+*Complexity*: Linear in n[.](#8.sentence-1)
+
+[ð](#lib:deque,constructor___)
+
+`template<class InputIterator>
+  constexpr deque(InputIterator first, InputIterator last, const Allocator& = Allocator());
+`
+
+[9](#9)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/containers.tex#L6684)
+
+*Effects*: Constructs adeque equal to the range
+[first, last),
+using the specified allocator[.](#9.sentence-1)
+
+[10](#10)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/containers.tex#L6692)
+
+*Complexity*: Linear in distance(first, last)[.](#10.sentence-1)
+
+[ð](#lib:deque,constructor____)
+
+`template<[container-compatible-range](container.intro.reqmts#concept:container-compatible-range "23.2.2.1 Introduction [container.intro.reqmts]")<T> R>
+  constexpr deque(from_range_t, R&& rg, const Allocator& = Allocator());
+`
+
+[11](#11)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/containers.tex#L6704)
+
+*Effects*: Constructs a deque with the elements of the range rg,
+using the specified allocator[.](#11.sentence-1)
+
+[12](#12)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/containers.tex#L6709)
+
+*Complexity*: Linear in ranges::distance(rg)[.](#12.sentence-1)