---
name: "geyacc"
section: "1"
platform: "linux"
package: "gobo"
version: "3.3-6"
release: "Debian 4.0 (Etch)"
platforms: ["linux"]
url: "https://new.carta.tech/geyacc"
---

# geyacc(1)

parser generator for Eiffel

## NAME

gelex - parser generator for Eiffel

## SYNOPSIS

**geyacc** *\[options\] file*

## DESCRIPTION

This manual page documents briefly the **geyacc**, command. This manual page was written for the Debian GNU/Linux distribution because the original program does not have a manual page. Instead, it has documentation in HTML format; see below.

**geyacc** is a program that reads an input file containing the description of a parser and generates an Eiffel class file to implement it.

## OPTIONS

The programs follow the usual GNU command line syntax, with long options starting with two dashes (\`-').

- **-t** *classname*

  - **--tokens=***classname*

  Write an extra class named classname (in upper-case) containing integer constants for the token type names defined in the grammar. This class is saved in file classname.e (in lower-case). This class is essential if you wish to put the definition of routine read\_token in a separate class, because read\_token needs to be able to refer to token type codes. This class also contains the routine token\_name  which is particularly useful to make debugging messages more human-readable.

- **-k***filename*

  - **--tokens-file=***filename*

  Name of the file where the extra class containing integer constants for the token type names will be written. If the -t  or --tokens option has not been specified, then nothing will be written to that file.

- **-h**

  - **-?**

  - **--help**

  Print a summary of the command-line options to geyacc and exit.

- **-o** *filename*

  - **--output-file=***filename*

  Specify the name *filename* for the parser file. If this option is not specified, the parser is generated to the standard ouptut.

- **-v** *filename*

  - **--verbose=***filename*

  Write an extra output file containing verbose descriptions of the parser states and what is done for each type of look-ahead token in that state. This file also describes all the conflicts, both those resolved by operator precedence and the unresolved ones.

- **-V**

  - **--version**

  Print the version number of geyacc and exit.

- **-x**

  Write each semantic action into a separate routine. The default is to write all semantic actions into the same routine, which can become too large for C back-end compilers to handle.

## SEE ALSO

GOBO and its programs are documented fully by HTML pages in the **gobo-doc package.**

## AUTHOR

This manual page was written by Oliver Elphick \<Oliver.Elphick@lfix.co.uk\> and updated by Julien Lemoine \<speedblue@debian.org\>  for the Debian GNU/Linux system (but may be used by others).