Code coverage of the project

[nguoithichkhampha]

I tried to check code coverage if this repo.
line coverage is almost same but branch coverage is different and function coverage is quite low.
Can someone help me to explain

I build with this config
cmake -DCMAKE_BUILD_TYPE=Debug -DJSON_BuildTests=ON -DCMAKE_CXX_FLAGS="--coverage" ../
and generate the report by gcovr
gcovr -r ../include/ . --exclude-noncode-lines -j5 --print-summary --html-details coverage/index.html --exclude-unreachable --exclude-throw-branches

[nlohmann]

Can you share the HTML report? It would be interesting to see which functions are not called.

[nguoithichkhampha]

coverage.zip
Here is the report. another thing, do you know why function not called but line coverage still count ?

[nlohmann]

I guess this is all related to templates.