Blocks
A roxy_block represents a single roxygen2 block.
The block_* functions provide a few helpers for common operations:
block_has_tag(blocks, tags): does block contain any of these tags?
block_get_tags(block, tags): get all instances of tags
block_get_tag(block, tag): get single tag. Returns NULL if 0,
throws warning if more than 1.
block_get_tag_value(block, tag): gets val field from single tag.
roxy_block(tags, file, line, call, object = NULL) block_has_tags(block, tags) block_get_tags(block, tags) block_get_tag(block, tag) block_get_tag_value(block, tag)
tags |
A list of roxy_tags. |
file, line |
Location of the |
call |
Expression associated with block. |
object |
Optionally, the object associated with the block, found
by inspecting/evaluating |
block |
A |
tag, tags |
Either a single tag name, or a character vector of tag names. |
# The easiest way to see the structure of a roxy_block is to create one # using parse_text: text <- " #' This is a title #' #' @param x,y A number #' @export f <- function(x, y) x + y " # parse_text() returns a list of blocks, so I extract the first block <- parse_text(text)[[1]] block
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