[Rd] parse(text=...) and the srcfile attribute

From: Deepayan Sarkar <deepayan.sarkar_at_gmail.com>
Date: Thu, 12 Jul 2007 18:52:50 -0700


I'm trying to understand whether the new source file references can help me with something I want to do. Let's say I have

foo <- parse(text = "
a <- 1; b <- 2**2
a + b

I now wish to recover the sources for the parsed expressions. I can get them one at a time:

> foo[[2]]

b <- 2^2
> as.character(attr(foo, "srcref")[[2]])
[1] "b <- 2**2"

Is there a better way? Perhaps like the print method

> as.character(foo, useSource = TRUE)

could give all the sources at once?


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