The following test indicates this is a problem with sphinx and not
pygments.
I copied and pastered source/temp.cpp into the pygments Demo
https://pygments.org/demo/
with Language C++ and it works fine:
On Wednesday, November 16, 2022 at 2:54:14 PM UTC-7 bradley...@gmail.com
wrote:
> Suppose the following file is named soruce/temp.cpp:
>
> double f(
> double x // '(x)
> )
> { return x; }
>
> If I put the following command in my sphinx-quickstart source/index.rst
> file below the toctree command:
>
> .. literalinclude:: temp.cpp
> :language: cpp
>
> and I execute the following command
>
> sphinx-build -b html source build
>
> I get the following error message
>
> ... sphinx/source/index.rst:14: WARNING: Could not lex literal_block
> as "cpp". ...
>
> If, in temp.cpp, I change the '(x) to (x) , the warning goes away and the
> file gets highlighted. It seems to me this change should not make any
> difference because it is inside a C++ comment.
>
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