sig_report: Summarise function complexity of a file or environment

In sig: Print Function Signatures

Description

Summarise function complexity of a file or environment

Usage

sig_report(x, ...)

## Default S3 method:
sig_report(x, ...)

## S3 method for class 'environment'
sig_report(x, too_many_args = 10, too_many_lines = 50,
  ...)

## S3 method for class 'character'
sig_report(x, ...)

## S3 method for class 'sigreport'
print(x, ...)

Arguments

x	A path to an R file or an environment.
...	Passed to sig_report.environment.
too_many_args	Upper bound for a sensible number of args.
too_many_lines	Upper bound for a sensible number of lines.

Details

sig_report summarises the number of input arguments and the number of lines of each function in an environment of file, and identifies problem files, in order to help you refactor your code. If the input is a path to an R file, then that file is sourced into a new environment and and the report is generated from that. The number of lines of code that a function takes up is subjective in R; this function uses length(deparse(fn)).

Value

An object of class “sigreport” with the elements.

• n_varsNumber of variables.

• n_fnsNumber of functions.

• n_argsTable of the number of args of each function.

• too_many_argsUpper bound for a sensible number of args.

• fns_with_many_argsNames of each function with more args than too_many_args.

• n_linesTable of the number of lines of each function body.

• too_many_linesUpper bound for a sensible number of lines.

• long_fnsNames of each function with more lines than too_many_lines.

Examples

#Summarise function complexity in an environment
sig_report(pkg2env(stats))
#Summarise function complexity in a file
## Not run: 
tmp <- tempfile(fileext = ".R")
writeLines(c(toString(sig(scan)), deparse(body(scan))), tmp)
sig_report(tmp)

## End(Not run)
# Adjust the cutoff for reporting
sig_report(
  baseenv(),
  too_many_args  = 20,
  too_many_lines = 100
)

sig documentation built on May 29, 2017, 11:34 a.m.