checkUsage Check R Code for Possible Problems

Description

Check R code for possible problems.

Usage

checkUsage(fun, name = "<anonymous>", report = cat, all = FALSE, 
           suppressLocal = FALSE, suppressParamAssigns = !all,
           suppressParamUnused = !all, suppressFundefMismatch = FALSE,
           suppressLocalUnused = FALSE, suppressNoLocalFun = !all,
           skipWith = FALSE, suppressUndefined = dfltSuppressUndefined,
           suppressPartialMatchArgs = TRUE) 
checkUsageEnv(env, ...) 
checkUsagePackage(pack, ...) 

Arguments

fun	closure.
name	character; name of closure.
env	environment containing closures to check.
pack	character naming package to check.
...	options to be passed to checkUsage.
report	function to use to report possible problems.
all	logical; report all possible problems if TRUE.
suppressLocal	suppress all local variable warnings.
suppressParamAssigns	suppress warnings about assignments to formal parameters.
suppressParamUnused	suppress warnings about unused formal parameters.
suppressFundefMismatch	suppress warnings about multiple local function definitions with different formal argument lists
suppressLocalUnused	suppress warnings about unused local variables
suppressNoLocalFun	suppress warnings about using local variables as functions with no apparent local function definition
skipWith	logical; if true, do no examine code portion of with expressions.
suppressUndefined	suppress warnings about undefined global functions and variables.
suppressPartialMatchArgs	suppress warnings about partial argument matching

Details

checkUsage checks a single R closure. Options control which possible problems to report. The default settings are moderately verbose. A first pass might use suppressLocal=TRUE to suppress all information related to local variable usage. The suppressXYZ values can either be scalar logicals or character vectors; then they are character vectors they only suppress problem reports for the variables with names in the vector.

checkUsageEnv and checkUsagePackage are convenience functions that apply checkUsage to all closures in an environment or a package. checkUsagePackage requires that the package be loaded. If the package has a name space then the internal name space frame is checked.

Author(s)

Luke Tierney

Examples

checkUsage(checkUsage)
checkUsagePackage("codetools",all=TRUE)
## Not run: checkUsagePackage("base",suppressLocal=TRUE)