codetools: Low Level Code Analysis Tools for R
In codetools: Code Analysis Tools for R

codetools

R Documentation

Low Level Code Analysis Tools for R

Description

These functions provide some tools for analysing R code. Mainly intended to support the other tools in this package and byte code compilation.

Usage

collectLocals(e, collect) 
collectUsage(fun, name = "<anonymous>", ...) 
constantFold(e, env = NULL, fail = NULL) 
findFuncLocals(formals, body) 
findLocals(e, envir = .BaseEnv) 
findLocalsList(elist, envir = .BaseEnv)
flattenAssignment(e) 
getAssignedVar(e) 
isConstantValue(v, w) 
makeCodeWalker(..., handler, call, leaf) 
makeConstantFolder(..., leaf, handler, call, exit, isLocal, foldable,
                   isConstant, signal)
makeLocalsCollector(..., leaf, handler, isLocal, exit, collect) 
makeUsageCollector(fun, ..., name, enterLocal, enterGlobal, enterInternal,
                   startCollectLocals, finishCollectLocals, warn,
                   signal)
walkCode(e, w = makeCodeWalker())

Arguments

`e`	R expression.
`elist`	list of R expressions.
`v`	R object.
`fun`	closure.
`formals`	formal arguments of a closure.
`body`	body of a closure.
`name`	character.
`env`	character.
`envir`	environment.
`w`	code walker.
`...`	extra elements for code walker.
`collect`	function.
`fail`	function.
`handler`	function.
`call`	function.
`leaf`	function.
`isLocal`	function.
`exit`	function.
`enterLocal`	function.
`enterGlobal`	function.
`enterInternal`	function.
`startCollectLocals`	function.
`finishCollectLocals`	function.
`warn`	function.
`signal`	function.
`isConstant`	function.
`foldable`	function.