Set regular expressions to read input documents

These are convenience functions to set pre-defined pattern lists (the syntax to read input documents). The function names are built from corresponding file extensions, e.g. pat_rnw() can set the Sweave syntax to read Rnw documents.

pat_rnw()

pat_brew()

pat_tex()

pat_html()

pat_md()

pat_rst()

pat_asciidoc()

pat_textile()

Value

The patterns object knit_patterns is modified as a side effect.

Examples

# see how knit_patterns is modified
knit_patterns$get()
#> $chunk.begin
#> NULL
#> 
#> $chunk.end
#> NULL
#> 
#> $chunk.code
#> NULL
#> 
#> $inline.code
#> NULL
#> 
#> $global.options
#> NULL
#> 
#> $input.doc
#> NULL
#> 
#> $ref.chunk
#> NULL
#> 
#> $header.begin
#> NULL
#> 
#> $document.begin
#> NULL
#> 
pat_rnw()
knit_patterns$get()
#> $chunk.begin
#> [1] "^\\s*<<(.*)>>=.*$"
#> 
#> $chunk.end
#> [1] "^\\s*@\\s*(%+.*|)$"
#> 
#> $inline.code
#> [1] "\\\\Sexpr\\{([^}]+)\\}"
#> 
#> $inline.comment
#> [1] "^\\s*%.*"
#> 
#> $ref.chunk
#> [1] "^\\s*<<(.+)>>\\s*$"
#> 
#> $header.begin
#> [1] "(^|\n)\\s*\\\\documentclass[^}]+\\}"
#> 
#> $document.begin
#> [1] "\\s*\\\\begin\\{document\\}"
#> 

knit_patterns$restore()  # empty the list