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### 210. distance first and last confused

Section: 27 [algorithms] Status: TC1 Submitter: Lisa Lippincott Opened: 2000-02-15 Last modified: 2016-01-28

Priority: Not Prioritized

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Discussion:

In paragraph 9 of section 27 [algorithms], it is written:

> In the description of the algorithms operators + and - are used for some of the iterator categories for which they do not have to be defined. In these cases the semantics of [...] a-b is the same as of
> `return distance(a, b);`

Proposed resolution:

On the last line of paragraph 9 of section 27 [algorithms] change `"a-b"` to `"b-a".`

Rationale:

There are two ways to fix the defect; change the description to b-a or change the return to distance(b,a). The LWG preferred the former for consistency.