Our .jucer has seen a fair few versions of JUCE and had
cppLanguageStandard="17" in the main JUCERPROJECT tag.
But also a
cppLanguageStandard="c++14" attribute lurking in:
<CONFIGURATION name="Debug" osxCompatibility="10.9 SDK" isDebug="1" optimisation="1" targetName="Loopcloud" cppLibType="libc++" cppLanguageStandard="c++14" etc../>
This latter tag does not show anywhere in the Projucer UI, so we were unaware of it.
This caused projucer to silently change the main C++ version of our project to c++14 whenever it was opened.
Would be nice if
Project::setCppVersionFromOldExporterSettings() could show a warning when it does this.