Support for multi-line `@examplesIf`?

[jonkeane]

When using @examplesIf I sometimes have conditions that are longer than can naturally fit on one line. It looks like @examplesIf currently takes only the first line and then disregards the rest of the lines, which leads to a malformed condition.

A (toy) example is:

#' @examplesIf {
#'   requireNamespace("dplyr", quietly = TRUE) &&
#'   requireNamespace("duckdb", quietly = TRUE) &&
#'   packageVersion("duckdb") > "0.2.7"
#' }

Which errors with Warning: [{file path}] @examplesIf failed to parse condition of @examplesIf

Would supporting multi-line @examplesIf conditions be something useful? I'm happy to look into this and submit a PR if it is.

[gaborcsardi]

If you have something like this, then you can have a helper function inside the package, and write

#' @examplesIf mypackage:::should_run_example()

I don't remember the details, but AFAIR multiline conditions were difficult to implement. Having an internal function inside the package seems better practice anyway.

[maelle]

Just saw multiline is actually supposed to work now: 9652d15