trace each call with a srcref attribute

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Description

This function calls itself recursively so it can properly traverse the AST.

Usage

1
trace_calls(x, parent_functions = NULL, parent_ref = NULL)

Arguments

x

the call

parent_functions

the functions which this call is a child of.

parent_ref

argument used to set the srcref of the current call when recursing

Value

a modified expression with count calls inserted before each previous call.

See Also

http://adv-r.had.co.nz/Expressions.html