rlang (version 0.2.2)

dots_values: Evaluate dots with preliminary splicing

Description

This is a tool for advanced users. It captures dots, processes unquoting and splicing operators, and evaluates them. Unlike dots_list(), it does not flatten spliced objects, instead they are attributed a spliced class (see splice()). You can process spliced objects manually, perhaps with a custom predicate (see flatten_if()).

Usage

dots_values(..., .ignore_empty = c("trailing", "none", "all"))

Arguments

...

Arguments to evaluate and process splicing operators.

.ignore_empty

Whether to ignore empty arguments. Can be one of "trailing", "none", "all". If "trailing", only the last argument is ignored if it is empty.

Examples

# NOT RUN {
dots <- dots_values(!!! list(1, 2), 3)
dots

# Flatten the objects marked as spliced:
flatten_if(dots, is_spliced)
# }