Parse Rd source text as the contents of a section

Parse Rd source text as the contents of a given section.

Usage

parse_Rdtext(text, section = NA)

Arguments

text: Rd source text, a character vector.
section: the section name, a string.

Details

If section is given, then parse_Rdtext parses text as appropriate for the content of section section. This is achieved by inserting text as an argument to the TeX macro section. For example, if section is "\usage", then a line "\usage{" is inserted at the begiinning of text and a closing "}" at its end.

If section is NA then parse_Rdtext parses it without preprocessing. In this case text itself will normally be a complete section fragment.

Value

an Rd fragment

Author

Georgi N. Boshnakov

Note

The text is saved to a temporary file and parsed using parse_Rd. This is done for at least two reasons. Firstly, parse_Rd works most reliably (at the time of writing this) from a file. Secondly, the saved file may be slightly different (escaped backslashes being the primary example). It would be a nightmare to ensure that all concerned functions know if some Rd text is read from a file or not.

The (currently internal) function .parse_Rdlines takes a character vector, writes it to a file (using cat) and calls parse_Rd to parse it.