modify_call: Modify the arguments of a call.

In pryr: Tools for Computing on the Language

Modify the arguments of a call.

Description

Modify the arguments of a call.

Usage

modify_call(call, new_args)

Arguments

call	A call to modify. It is first standardised with standardise_call.
new_args	A named list of expressions (constants, names or calls) used to modify the call. Use NULL to remove arguments.

Examples

call <- quote(mean(x, na.rm = TRUE))

# Modify an existing argument
modify_call(call, list(na.rm = FALSE))
modify_call(call, list(x = quote(y)))

# Remove an argument
modify_call(call, list(na.rm = NULL))

# Add a new argument
modify_call(call, list(trim = 0.1))

# Add an explicit missing argument
modify_call(call, list(na.rm = quote(expr = )))

pryr documentation built on Jan. 18, 2023, 1:08 a.m.