@pascal-psi/lexer v0.0.2

PSI

This is a Work-in-Progress ISO 7185 Pascal interpreter I am building in order to get confident with lexers, parsers, interpreters and all that good stuff. All PRs are welcomed and for any question you can join our gitter chat!

Installation

To install the CLI, execute the following command:

npm install -g @pascal-psi/cli

or with Yarn

yarn global add @pascal-psi/cli

Usage

psi <file to interpret>

Demos

There are demo programs you can try running in the demos directory

Build

This project is structured as a monorepo using Lerna.

In order to build the project, first install lerna

npm install -g lerna

or with Yarn:

yarn global add lerna

And then run lerna bootstrap on the root directory. This will install all the dependencies for all the modules and link them together.

If you want to run the CLI, run the /modules/cli/bin/run file

Support:

• Data types
  • Integer (Does not support scientific notation)
  • Real (Does not support scientific notation)
  • Boolean
  • Char
  • Arrays
• Variables
• Procedures
• Flow Control
  • If
  • Else If
  • Else
• Loops
  • For...Do
  • While...Do
  • Repeat...Until
• Numerical Operators
  • Addition (+)
  • Subtraction (-)
  • Multiplication (*)
  • Division (/)
  • Integer Division (div)
  • Modulus (mod)
• Logical Operators
  • AND
  • OR
  • NOT
• Comparison Operators
  • Equals (=)
  • Not Equals (<>)
  • Less than (<)
  • Less or Equal than (<=)
  • Greater than (>)
  • Greater or Equal than (>=)
• Library
  • Write
  • WrtiteLn

Contributing

Please join the gitter chat if you are interested in contributing to this project.