If you are looking for an R code parser, I think the `parse` and `eval` function might be a good start point. See the example below.
> parse(text="function(x)message(x)") expression(function(x)message(x)) > eval(parse(text="function(x)message(x)")) function(x)message(x) Best, Jiefei On Fri, Sep 6, 2019 at 12:55 PM Golden, Shelby <gold...@njhealth.org> wrote: > Hello Bert, > > Thank you for the reply and your clarifications. Yes, it might be helpful > to look into R’s formal grammar to see how “function” parses input to > delegate correct syntax. Is that accessible online? > > Thank you, > Shelby > > > From: Bert Gunter <bgunter.4...@gmail.com> > Date: Friday, September 6, 2019 at 10:44 AM > To: "Golden, Shelby" <gold...@njhealth.org> > Cc: "r-help@R-project.org" <r-help@r-project.org>, "Gillenwater, Lucas" < > gillenwat...@njhealth.org> > Subject: Re: [R] [R-devel] Source Code for function > > 1. This is a plain text list; all html is stripped. So there is no red > highlighting. > > 2. There is no "source code" for "function" -- it is a reserved keyword. > Or are you looking for R's formal grammar -- e.g. how it parses input to > determine correct syntax? > > > > Bert Gunter > > "The trouble with having an open mind is that people keep coming along and > sticking things into it." > -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip ) > > > On Fri, Sep 6, 2019 at 8:51 AM Golden, Shelby <gold...@njhealth.org > <mailto:gold...@njhealth.org>> wrote: > Hi all, > > I have been attempting to access the source code for the keyword > “function” to better understand how it assigns and stores logical inputs, > like in the subset() [base] function. Does anyone know how I can access the > source code for this? > > For example, if I have > norm <- function(x){ > sqrt(x%*%x)) > } > I am looking for the source code for the “function” portion, highlighted > in red. > > Thank you for your time and assistance, > Shelby Golden > Lab Researcher Technician > Dr. Russell Bowler’s Lab > Department of Medicine > National Jewish Health in Denver, CO > Phone: (303) 270-2598 > > NOTICE: This email message is for the sole use of the intended > recipient(s) and may contain confidential and privileged information. Any > unauthorized review, use, disclosure or distribution is prohibited. If you > are not the intended recipient, please contact the sender by reply email > and destroy all copies of the original message. > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org<mailto:R-help@r-project.org> mailing list -- To > UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help< > http://mx2.njhealth.org:32224/?dmVyPTEuMDAxJiZmMWRiYmMxZjFmNmI5ZDBkMz01RDcyOEQwN18yMjk2OF8zOTk2XzEmJjljNzlmMDA4YWRmZTZjMz0xMjMzJiZ1cmw9aHR0cHMlM0ElMkYlMkZzdGF0JTJFZXRoeiUyRWNoJTJGbWFpbG1hbiUyRmxpc3RpbmZvJTJGci1oZWxw > > > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html< > http://mx2.njhealth.org:32224/?dmVyPTEuMDAxJiZlMTkwYmMwMzFlNjk4ZTAzNz01RDcyOEQwN18yMjk2OF8zOTk2XzEmJmFkYTkxMWRkMWRhZTFkNz0xMjMzJiZ1cmw9aHR0cCUzQSUyRiUyRnd3dyUyRVItcHJvamVjdCUyRW9yZyUyRnBvc3RpbmctZ3VpZGUlMkVodG1s > > > and provide commented, minimal, self-contained, reproducible code. > > [[alternative HTML version deleted]] > > ______________________________________________ > 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. > [[alternative HTML version deleted]] ______________________________________________ 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.
