Compute summary statistics for R code AST

Parses the code and returns counts of calls, assignments, symbols, expressions, and maximum nesting depth.

Usage

ast_stats(code)

Arguments

code

Character(1). R code to analyse.

Value

A named list with components:

n_calls

Number of function calls.

n_assignments

Number of assignment operations (including <-, =, ->, <<-, ->>, and assign()).

n_symbols

Number of symbol (name) references.

depth

Maximum AST nesting depth.

n_expressions

Number of top-level expressions.

Examples

stats <- ast_stats("x <- mean(1:10)\ny <- x + 1")
stats$n_calls
#> [1] 5
stats$n_assignments
#> [1] 2
stats$depth
#> [1] 3