line_calling: Find a line calling a function
In dtkaplan/checkr2: Exploring ideas for successor to checkr

Description Usage Arguments Details Value Examples

Searches throughly through each line in a checkr_result to find a call to any of the functions listed in the dots. ...

1 2	line_calling(ex, ..., n = 1L, message = "Didn't find matching function.", just_the_fun = FALSE)

`ex`	a checkr_result from a previous application of a checkr function, e.g. `for_checkr()`
`...`	unquoted functions to search for. A match to any one will trigger success.
`n`	an integer specifying which successful line to return. (Default: 1, the first.)
`message`	a character string to include in the checkr_result if the search is a failure.
`just_the_fun`	If TRUE, don't return the whole line, just the call involving the function

The functions in ... should be unquoted, e.g. sin or lm rather than "sin". Note that infix functions, e.g. +, -, ||, must be in backquotes: `+`.

Like all checkr functions, if the input ex is marked as a fail the output will be a short circuit, that is, immediately returning the input unchanged.

A checkr_result with a pass, fail, or ok result. If a pass, the code component of the returned value will have the line found by the search. Otherwise it will contain the input code unaltered.

code <- for_checkr("x <- 1; y <- x^2; z <- (y^2 + 7) / 2")
line_calling(code, `^`, message="Didn't find any line using exponentiation.")
line_calling(code, `^`, message="Didn't find any line using exponentiation.",
    just_the_fun = TRUE)
line_calling(code, `^`, n = 2L, message = "Didn't find a second line using exponentiation.")