PASCAL COMPILER (PASC)

An implementation of the Pascal Programming Language as defined by the ISO 7185:1990 Standard.

This is a compiler implementation, with a front-end that generates LLVM IR, and a backend that utilizes the LLVM toolchain to optimize the IR and generate executables. In the midst of that, the program is serialized to and from protocol buffers to accommodate the Go front-end and C++ backends.

Getting Started

Pasc is implemented in Go and C++. You should have recent toolchains for both languages installed on your system. See the Requirements section for a list of additional project dependencies.

Requirements

• Go >= v1.18
• git >= 2.30
• cmake >= v3.2
• GNU Make >= v3.5

Build

Once we have these requirements installed, Use make commands to build an executable.

• make deps - install dependencies
• make build - build and install both the front-end and back-end
• make test - run tests

To build the project from source, the following step should suffice:

# clone the project repository
$ git clone https://github.com/anthonyabeo/pasc.git 

# change into the project directory root
$ cd pasc

# install dependencies, run tests, and build and executable 
$ sudo make deps
$ make test
$ sudo make build

Usage

$ pasc --help

USAGE
  pasc [flags] <subcommand> [command flags]

SUBCOMMANDS
  build  Compile and produce an executable


$ pasc build --help                     
USAGE
  pasc build [-o output] <program-file>

FLAGS
  --o string
        output executable name (default a.out)

Examples

Compile a simple example program that utilizes if-statements. This will produce an executable called ifstmt in the root-level bin directory.

$ pasc build -o ifstmt examples/ifstmt.pas
$ ./bin/ifstmt