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Complete documentation gram.y ??

3 messages · Patricia Bautista, Duncan Murdoch, Barry Rowlingson

Original
Patricia Bautista
# 
Hi everybody, 

Does anybody know where I can find documentation about
file gram.y?. What I need to do is related to the
parse tree. I need the parse tree of a R user defined
function for being used by a c++ function. Briefly, I
have a C++ function that is used to generate random
numbers from a specified objective function and I want
to use R just to verified the sintaxis of the function
and I want C++ for doing the evaluations of the
mentioned function.

Thanks for any help in advance.
Patricia. 


	
	
		
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Duncan Murdoch
#
On 9/8/2006 10:03 AM, Patricia Bautista wrote:
It's input to bison (or yacc).  You could read bison documentation to 
find what it does.  I don't think there is any documentation for it 
other than that and the source code itself.

Duncan Murdoch


What I need to do is related to the
Barry Rowlingson
#
Patricia Bautista wrote:
A function in R can't exist unless its syntactically correct. Or is 
your function reading a text representation of an R function (from a 
file or user input as a string)? In which case it would be easier to 
check the syntax from R just by using 'eval' in a 'try' clause, and then 
pass the function object to C++ in the usual documented way (as an SEXP).


Barry