Consider newer C++ libraries to get TOML 1.0 compliance

[eddelbuettel]

As it looks like cpptoml is stale at hence "forever" stuck at TOML 0.5 compliance, it may make sense to look at

• tomlcpp (uses library)
• tomlplusplus (header-only, C++17)
• toml11 (header only, C++11)

instead.

[homalozoa]

Perhaps we can talk about new lib here...

[eddelbuettel]

Indeed. Over at skystrife/cpptoml#123 was really overusing that repo -- I should have noticed earlier.

I am game. We could use a branch here. Or start a new one, maybe even under a temp name (rcpptoml2 ?) before we settle. Starting with tomlplusplus is fine by me (as using a header-only library is extra portable).

[homalozoa]

rcpptoml2 is a good name, I think rcpptomlplusplus is too lengthy. Should we distinguish 0.5 compliance and 1.0 compliance clearly? If not, we can just create a branch. If so, perhaps we should create a new repo.

[eddelbuettel]

I'll set something up tomorrow morning. I like RcppTomlPlusPlus is that is what we go with.

[eddelbuettel]

Thanks for the nudge. We now have https://github.com/eddelbuettel/rcpptomlplusplus and it provides the minimal working example (of just displaying to standard output). After R CMD build . and R CMD INSTALL RcppToml*tar.gz you can do

> library(RcppTomlPlusPlus)
> example(simpleParser)     # renamed, I like camelCase

which will print out the example.toml also included in the package.

[eddelbuettel]

This is now taken care of in this branch which I may soon PR and send to CRAN:
https://github.com/eddelbuettel/rcpptoml/tree/feature/tomlplusplus