arg_calling: Pull out an line, expression, or argument calling a specified...

In dtkaplan/checkr: Facilities for checking R submissions in tutorials

Description

Find an argument

Usage

arg_calling(ex, ..., n = 1L, message = "call to function")

Arguments

ex	An call to be checked
...	unquoted function names
n	Look for the nth passing argument
message	character string message on failure

Examples

ex <- for_checkr(quote(15 * sin(53 * pi / 180)))
ex2 <- for_checkr(quote(yy <- sin(3))) # at the top level
line_calling(ex, sin)
# look only in arguments: the top-level function doesn't count
arg_calling(ex, sin)
arg_calling(ex2, sin)
# But line_calling() will find it at the top level.
line_calling(ex2, sin)

dtkaplan/checkr documentation built on May 15, 2019, 4:59 p.m.