getAllCalls: Get all function calls in R code

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

Get all function calls in R code

Description

This statically analyzes the R code and finds all calls both at the top-level in a script and in functions, in a directory of R files, etc.

One situation in which this can be useful is to identify which packages need to be loaded/imported for a collection of files, e.g., when creating a package from existing files, or knowing which calls to link[base]{library} are needed.

getAllSymbols gets all the symbols in an R language object.

Usage

getAllCalls(x, ...)
getAllSymbols(expr, predicate = is.symbol)

Arguments

x	a character vector of file or directory names or the parsed code
...	arguments for methods
expr	the R code/language object
predicate	the function that determines whether the language object is a symbol and one we want to capture. This can be more specific such as function(x) is.symbol(x) && as.character(x) %in% c("foo", "bar")

Value

A list of rstatic Call objects.

Author(s)

Duncan Temple Lang, Nick Ulle

References

rstatic package https://github.com/nick-ulle/rstatic.git

See Also

findCallsTo

Examples

## Not run: 
  # calls by file in the directory R/
  f = getAllCalls("R")
  # flatten to a list of all calls
  k = unlist(f, recursive = FALSE)
  # What is the class
  table(sapply(k, function(x) class(x$fn)[1]))
  funs = sapply(k[sapply(k, function(x) is(x$fn, "Symbol"))], function(x) x$fn$value)
  table(funs[ !(funs 

## End(Not run)

duncantl/CodeAnalysis documentation built on Feb. 21, 2024, 10:49 p.m.