On Friday, 14 June 2019 13:50:34 PDT Ivan Matek via Std-Proposals wrote:
> private using namespace std; // applies to ONLY this file, files that
> include headery_mcheaderface.h will not get polluted, nice for making
> declarations shorter

There's no concept of file in C++. Remember that the preprocessor will run and
concatenate all content before the actual C++ compiler sees anything.

You may want to rethink your proposal in terms of Modules.

-- 
Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org
   Software Architect - Intel System Software Products
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