No. Read Hadley Wickham's "Advanced R" to learn why not. -- Sent from my phone. Please excuse my brevity.
On December 10, 2016 10:24:49 PM PST, frede...@ofb.net wrote: >Dear R-Help, > >I asked this question on StackOverflow, > >http://stackoverflow.com/questions/41083293/in-r-how-do-i-define-a-function-which-is-equivalent-to-deparsesubstitutex > >but thought perhaps R-help would be more appropriate. > >I want to write a function in R which grabs the name of a variable >from the context of its caller's caller. I think the problem I have is >best understood by asking how to compose `deparse` and `substitute`. >You can see that a naive composition does not work: > > # a compose operator > > `%c%` = function(x,y)function(...)x(y(...)) > > # a naive attempt to combine deparse and substitute > > desub = deparse %c% substitute > > f=function(foo) { message(desub(foo)) } > > f(log) > foo > > # this is how it is supposed to work > > g=function(foo) { message(deparse(substitute(foo))) } > > g(log) > log > >Is there a way I can define a function `desub` so that `desub(x)` has >the same value as `deparse(substitute(x))` in every context? > >Thank you, > >Frederick Eaton > >______________________________________________ >R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see >https://stat.ethz.ch/mailman/listinfo/r-help >PLEASE do read the posting guide >http://www.R-project.org/posting-guide.html >and provide commented, minimal, self-contained, reproducible code. ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
