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https://issues.apache.org/jira/browse/STDCXX-622?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Travis Vitek closed STDCXX-622.
-------------------------------
Resolution: Duplicate
> valarray operator requirements not consistent with standard
> -----------------------------------------------------------
>
> Key: STDCXX-622
> URL: https://issues.apache.org/jira/browse/STDCXX-622
> Project: C++ Standard Library
> Issue Type: Bug
> Components: 26. Numerics
> Affects Versions: 4.2.0
> Reporter: Travis Vitek
> Assignee: Travis Vitek
> Priority: Minor
> Fix For: 4.2.1
>
>
> 26.3.2.6 p1 says
> Each of these operators may only be instantiated for a type T to which the
> indicated operator can be
> applied. Each of these operators performs the indicated operation on each of
> its elements and the corresponding
> element of the argument array. [for operators *=, /=, %=, +=, -=, ^=, &=, |=,
> <<= and >>=]
> The current implementation of the valarray member operators violate these
> requirements. Internally they use the transform algorithm with one of the
> function adapters [i.e. multiplies, divides]. So valarray<T>::operator+=()
> will use T::operator+() and T::operator=() when it should be using
> T::operator+=(). As a direct result of this, the 26.valarray.cassign test
> fails to compile on all platforms.
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