feedc0de/mp-units
1
0
Fork 0
forked from mpusz/mp-units
Code Pull Requests Activity

Compilation Errors chapter added to FAQ

Browse Source
This commit is contained in:
Mateusz Pusz
2020-05-09 13:12:35 +02:00
parent 90fddb925d
commit 257d86185a
1 changed files with 20 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
docs/faq.rst
View File

@@ -75,4 +75,23 @@ to obey the rules and be consistent with ISO specifications.
:term:`International System of Quantities`. It is a style guide for the use of
physical quantities and units of measurement, formulas involving them, and their
corresponding units, in scientific and educational documents for worldwide use.
Read more on `Wikipedia <ISO/IEC 80000 https://en.wikipedia.org/wiki/ISO/IEC_80000>`_.
Read more on `Wikipedia <ISO/IEC 80000 https://en.wikipedia.org/wiki/ISO/IEC_80000>`_.
Compilation Errors
------------------
error: reference to ‘time’ is ambiguous
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Unfortunately, if `using-directives <https://en.cppreference.com/w/cpp/language/namespace#Using-directives>`_
(i.e. :expr:`using namespace units::physical::si`) are being used, `units::physical::si::time` will
collide with C `time <https://en.cppreference.com/w/c/chrono/time>`_ function. In such a case the library's
`time` function needs to be prefixed with at least one (or all) namespace names.
error: template argument 1 is invalid
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Again, usage of :expr:`using namespace units`
`using-directive <https://en.cppreference.com/w/cpp/language/namespace#Using-directives>`_ may result in
the collision between `units::exp` class template and C `exp <https://en.cppreference.com/w/c/numeric/math/exp>`_
function. In such a case the library's `exp` class template needs to be prefixed with `units` namespace name.