filter

the function to be applied on the AST.

optional arguments to <code>FUN</code>.

a connection object or a character string from which the JSON-formatted AST is read.

input

a connection object or a character string to which the JSON-formatted AST is written.

output

Apply a filter on the JSON-formatted abstract syntax tree (AST).

The document converter 'pandoc' <http://pandoc.org/> is widely used
in the R community. One feature of 'pandoc' is that it can produce and consume
JSON-formatted abstract syntax trees (AST). This allows to transform a given
source document into JSON-formatted AST, alter it by so called filters and pass
the altered JSON-formatted AST back to 'pandoc'. This package provides functions
which allow to write such filters in native R code.
Although this package is inspired by the Python package 'pandocfilters'
<https://github.com/jgm/pandocfilters/>, it provides additional convenience functions which make it simple to use the 'pandocfilters' package as a
report generator. Since 'pandocfilters' inherits most of it's functionality
from 'pandoc' it can create documents in many formats
(for more information see <http://pandoc.org/>) but is also bound to the same
limitations as 'pandoc'.

filter: Filter JSON-formatted AST.

Description

Usage

Arguments