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Dunnart D Parser Generator (ddpg)

Enhanced LALR(1) Parser Generator for the D Programming Language.

This (ddgp) tool is an implementation in D of the LALR(1) parser generators described in "Compilers - Principles, Techniques and Tools" (Aho, Sethi and Ullman, 1986) (aka the red dragon book) with modifications to allow conflict resolution using boolean predicates and a built in lexical analyser. It produces a single D file as output.

The specification language for dunnart (in itself) is described (in the specification language for dunnart) in the file dunnart.ddgs which was used to implement the ddpg program recursively via a three stage bootstrap process (one stage now permanently retired).

Building ddgp

To build ddgp execute the following:

$ make

in the base directory.

Synopsis

ddgp [<options>] <specification file name>
Options:
    -f|--force:
        overwrite existing output file
    -m <name> | --module=<name>:
        insert a "module" statement in the output file using name
    -v | --verbose:
        produce a full description of the grammar generated
    -o <name> | --output=<name:
        write the generated parser code to the named file
    -p <path> | --prefix=<path>:
        if using a path name based on the module name prefix it with path
    -e  <number> | --expect=<number>:
        expect exactly "number" total conflicts
    -s  <path> | --states=<path>:
        write a textual description of the parser's states to "path"
        to assist in resolution of any conflicts

Output File Name

If the --module option is used the output filename will be derived from the module name (prefixed with the argument to the --prefix option if present) unless it is overruled by the --output option. If neither the --module nor --output option are present, the output filename will be constructed by replacing the input filename's suffix with "d".

In no event, will an existing file be overwritten unless the --force option is used.

License

Dunnart D Parser Generator (ddpg) is licensed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at).