Param set sugar, take 2

[mb706]

Alternative API for creating ParamSet objects, using nonstandard evaluation to enable short and concise input.

> pSS(a: logical, b: integer[0, 10], c: numeric^2)
           Type len Def      Constr Req Tunable Trafo
a       logical   -   -           -   -    TRUE     -
b       integer   -   -     0 to 10   -    TRUE     -
c numericvector   2   - -Inf to Inf   -    TRUE     -

[mb706]

Pretty much all the magic happens in R/ParamSetSugar.R.

[coveralls]

Coverage increased (+0.1%) to 96.186% when pulling 7e3e209 on paramSetSugar into 59c649e on master.

[jakob-r]

It looks nice. What are your thoughts on putting it in a little extra package. ParamHelperHelper? 😅
Just in case we can not decide whether we want a new meta language to be part of PH.

[berndbischl]

it really shouldnt go into yet another package. but we might put it into PH2? that seems pretty advanced and we can then push a bigger change through?

[mb706]

What is the ETA of that? Does PH2 break much compatibility with the current "ParamHelpers"? I rely on Param Set Sugar in mlrCPO, but medium term I can also just ship it in mlrCPO if you think it doesn't belong here.