---
name: "yapps"
section: "1"
platform: "linux"
package: "yapps2"
version: "2.1.1-17.5"
release: "Debian 9 (Stretch)"
platforms: ["linux"]
url: "https://new.carta.tech/yapps"
---

# yapps(1)

create a Python module from a grammar file

## NAME

yapps - create a Python module from a grammar file

## SYNOPSIS

**yapps** \[ **--dump** \] \[ **--use-devel-grammar** \] \[ **-fcontext-insensitive-scanner** \] \[ **-p**  **pid** \] \[ **-f** \] input.g \[ **output.py** \]  **name**

## DESCRIPTION

  \--dump                           Dump out grammar information\
     \--use-devel-grammar              Use the devel grammar parser from\
 	yapps\_grammar.py instead of the stable grammar from grammar.py\
 	  \-fcontext-insensitive-scanner    Scan all tokens (see docs)

*yapps* generates a Python program which will parse a given grammar.

## OPTIONS

- **--dump**

  Dump the grammar information to stdout.

- **--use-devel-grammar**

  Use the grammar file in ./yapps\_grammar.py instead of yapps/grammar.py.\
   This option is useful for testing new grammar parsers. (Yes, yapps' parser is itself written with yapps...)

- **-fcontext-insensitive-scanner**

  Set the option to use the non-context-sensitive scanner.

## CAVEATS

*yapps* implements a recursive-descent scanner.

## HISTORY

Written by Amit J. Patel \<amitp@cs.stanford.edu\>.\
 This version was enhanced by Matthias Urlichs \<smurf@debian.org\>. It is **not** downwards-compatible with the original yapps2 (yet) and uses a different runtime library.\
 See the change log for details.