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\name{codetools}
\alias{codetools}
\title{Low Level Code Analysis Tools for R}
\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())
}
\alias{collectLocals}
\alias{collectUsage}
\alias{constantFold}
\alias{findFuncLocals}
\alias{findLocals}
\alias{findLocalsList}
\alias{flattenAssignment}
\alias{getAssignedVar}
\alias{isConstantValue}
\alias{makeCodeWalker}
\alias{makeConstantFolder}
\alias{makeLocalsCollector}
\alias{makeUsageCollector}
\alias{walkCode}
\arguments{
\item{e}{R expression.}
\item{elist}{list of R expressions.}
\item{v}{R object.}
\item{fun}{closure.}
\item{formals}{formal arguments of a closure.}
\item{body}{body of a closure.}
\item{name}{character.}
\item{env}{character.}
\item{envir}{environment.}
\item{w}{code walker.}
\item{\dots}{extra elements for code walker.}
\item{collect}{function.}
\item{fail}{function.}
\item{handler}{function.}
\item{call}{function.}
\item{leaf}{function.}
\item{isLocal}{function.}
\item{exit}{function.}
\item{enterLocal}{function.}
\item{enterGlobal}{function.}
\item{enterInternal}{function.}
\item{startCollectLocals}{function.}
\item{finishCollectLocals}{function.}
\item{warn}{function.}
\item{signal}{function.}
\item{isConstant}{function.}
\item{foldable}{function.}
}
\description{
These functions provide some tools for analysing R code. Mainly
intended to support the other tools in this package and byte code
compilation.
}
\author{Luke Tierney}
\keyword{programming}
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