Reminders.md

In duncantl/CodeAnalysis: Tools for Static Analysis of R code

findCallsTo()

• If not given a value for funNames, will find all calls.
• funNames can be a character vector and will only return calls to those functions.
• can be limited to look in just the current function and not recurse into sub-function definitions. Use maxFunDepth.

getFunctionDefs()

• can take a
  • directory,
  • vector of file names
  • a parsed script
  • a function object

callGraph()

• Determines which function calls which other functions

• Does not determine how many times one function calls another, just a simple binary 0 or 1.

• Can get the number of calls with

defs = getFunctionDefs("R")
cfuns = lapply(defs, \(x) getGlobals(x)$functions)
cfuns = unlist(cfuns)
cfuns = cfuns[ cfuns %in% names(defs)]
dsort(table(cfuns))

mkModifyCodeWalker()

• Allows caller to specify a function to modify or remove a language element in an AST.

S3Assignments

• Finds all the S3 class names used/referenced in code.

getAttributeNames()

• gets the names of all attributes used in attr() or structure() calls.
• currently takes a language object, not a file or directory.

• findAssignsTo is a call to findCallsTo with a specific predicate function passed to mkCallWalkerPred().
• findCallsTo just arranges to get the code to walk and calls walkCode() with the walker it is given.
  • if not given an explicit walker, it creates one with mkCallWalkerPred() or mkCallWalker()

duncantl/CodeAnalysis documentation built on June 12, 2025, 6:44 a.m.