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### 2038. Missing definition for `incrementable` iterator

Section: 25.3.5.4 [output.iterators] Status: Open Submitter: Pete Becker Opened: 2011-02-27 Last modified: 2016-01-28

Priority: 3

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Discussion:

In comp.lang.c++, Vicente Botet raises the following questions:

> "In "24.2.4 Output iterators" there are 3 uses of incrementable. I've not found the definition. Could some one point me where it is defined?

> Something similar occurs with dereferenceable. While the definition is given in "24.2.1 In general" it is used several times before.

> Shouldn't these definitions be moved to some previous section?"

He's right: both terms are used without being properly defined.

There is no definition of "incrementable".

While there is a definition of "dereferenceable", it is, in fact, a definition of "dereferenceable iterator". "dereferenceable" is used throughout Clause 23 (Containers) before its definition in Clause 24. In almost all cases it's referring to iterators, but in 16.4.4.3 [swappable.requirements] there is a mention of "dereferenceable object"; in 16.4.4.6 [allocator.requirements] the table of Descriptive variable definitions refers to a "dereferenceable pointer"; 20.2.3.3 [pointer.traits.functions] refers to a "dereferenceable pointer"; in 30.4.6.2.3 [locale.time.get.virtuals]/11 (`do_get`) there is a requirement that a pointer "shall be dereferenceable". In those specific cases it is not defined.

[2011-03-02: Daniel comments:]

I believe that the currently proposed resolution of issue 2035 solves this issue as well.

[ 2011 Bloomington ]

Agree with Daniel, this will be handled by the resolution of 2035.

Proposed resolution: