VHDL Parser

1 Overview

This project aims to provide an open-source parser for VHDL 2008, staying as close to IEEE Std 1076-2008 as I could get without having left recursion in the grammar (I'm looking at you, prefix).

It is released under the MIT license.

1.1 Current status

It is currently abandoned because I've found a better, faster way to create an AST.

At this point in time:

• The code will compile and the executable should parse a VHDL'93 file and print its Abstract Syntax Tree (AST) to the standard output.
• VHDL 2008 may partially work, but isn't fully tested.
• 'special characters' with ASCII codes of 160 or higher are not parsed properly

At best, it's a reference for multi-platform builds.

1.2 Multi-Platform Build

This project requires cmake and the Boost library (for 'program_options') to build.

Under MSys2, pacboy find boost to see which libraries are available and pacman -S <package> to install.

Example for 64-bit MinGW under MSys2:

pacman -S mingw64/mingw-w64-x86_64-boost

Building:

mkdir build && cd build
cmake -G "Unix Makefiles" -DCMAKE_BUILD_TYPE=Release ..
make

2 Thanks

This parser would not be possible without Y Hirose's cpp-peglib.h, and debugging the PEG grammar was greatly assisted by Mirko Kunze's pegdebug and the linter that's in cpp-pegilb.h.

3 Testing

Build the cpp-peglib.h project and copy lint/peglint into the grammar folder of this project.

Run individual tests with: ./peglint vhdl2008.peg --packrat tests/<test_name.vhd>