writeBNF {xegaBNF}

Write BNF into text file.

Description

writeBNF() writes a character string into a textfile.

Usage

writeBNF(g, fn = NULL, eol = "\n")

Arguments

g

A named list with $filename and $BNF as a character string.

fn

A file name. Default: NULL.

eol

End-of-line symbol(s). Default: "\n"

Details

The user writes the BNF to a text file which he edits. The newline symbols are inserted after each substitution variant and after each production rule to improve the readability of the grammar by the user.

Value

Invisible NULL.

See Also

Other File I/O: newBNF(), readBNF()

Examples

g<-booleanGrammar()
fn<-tempfile()
writeBNF(g, fn)
g1<-readBNF(fn, eol="\n")
unlink(fn)