From deepayan.sarkar at gmail.com  Fri Jul 13 03:52:50 2007
From: deepayan.sarkar at gmail.com (Deepayan Sarkar)
Date: Thu, 12 Jul 2007 18:52:50 -0700
Subject: [Rd] parse(text=...) and the srcfile attribute
Message-ID: <eb555e660707121852x13817360t5def7f645632e86@mail.gmail.com>

Hi,

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?

-Deepayan



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