On 09/12/2019 17:48, Luboš Luňák wrote:
The relevant code is [2]. "GrFragmentProcessor::PaintCRange" is a ctor call for a range type [3], which has "return CIter(fT);" as its begin(). And CIter indeed has a deleted copy ctor, but AFAICT it shouldn't be needed, C++17's guaranteed copy ellision should take care of it.
Advertisement vs. support of guaranteed copy elision is known broken with MSVC, see <https://gerrit.libreoffice.org/plugins/gitiles/core/+/62bfe29f9045127d479c42376f599ddfb0fbb2ca%5E!/> "Already set MSVC's -std:c++17 during the configure.ac feature check".
And it builds with GCC/Clang, and it builds even with MSVC here locally. So to me it looks like a MSVC bug that's been fixed. How much of a problem would it be to bump the minimal required MSVC version (not that I know which one it would be exactly)?
We detect HAVE_CPP_GUARANTEED_COPY_ELISION (cf. commit mentioned above) for at least the (most recent anyway, I think) VS 2019 version 16.3.10, _MSC_VER == 1923 that I have locally.
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