[R] static analysis tools for R code?

[Dimitris Rizopoulos]

If I understand well what you need then (I think) the answer is No; 
this is a feature of the language called "Lazy Evaluation". For more 
info look at e.g., the "R Language Definition" document, section 
4.3.3.

Best,
Dimitris

----
Dimitris Rizopoulos
Ph.D. Student
Biostatistical Centre
School of Public Health
Catholic University of Leuven

Address: Kapucijnenvoer 35, Leuven, Belgium
Tel: +32/16/336899
Fax: +32/16/337015
Web: http://www.med.kuleuven.ac.be/biostat/
     http://www.student.kuleuven.ac.be/~m0390867/dimitris.htm


----- Original Message ----- 
From: "Vivek Rao" <rvivekrao at yahoo.com>
To: <r-help at stat.math.ethz.ch>
Sent: Monday, April 11, 2005 4:18 PM
Subject: [R] static analysis tools for R code?


> An R script will terminate when one tries to use an
> undefined variable, with a message such as
>
> Error in print(x) : Object "x" not found
>
> This run-time error might occur after the script has
> already been running for some time. In some cases it
> would be nice to get such warnings before the script
> is run, just as a syntax error caused by a missing
> parenthesis is caught.
>
> Are there any "static analysis" tools for R? Such a
> tool would not have to be perfect to be useful.
> Besides using undefined variables, defining variables
> that are never used is something I'd like to be warned
> about.
>
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