pascal-js-compiler

Compiles Pascal source code to JavaScript. It is the code-generation stage of pascal-toolchain: it consumes the AST produced by pascal-parser and emits runnable JavaScript.

Installation

npm install pascal-js-compiler

Usage

import { compile } from 'pascal-js-compiler';

const js = compile(`
program Hello;
begin
  writeln('Hello, world!');
end.
`);

console.log(js);
// // Generated from Pascal program: Hello
// console.log("Hello, world!");

eval(js); // => Hello, world!

You can also generate from an AST you already have:

import { generate } from 'pascal-js-compiler';
import { parse } from 'pascal-parser';

const js = generate(parse(source));

What it supports

The generator targets the full parser AST contract:

• program blocks, variable declarations, procedures/functions
• statements: assignment (:= → =), if/else, while, for..to / for..downto, calls
• expressions: binary/unary operators, identifiers, numeric/string/boolean literals
• operator mapping: = → ===, <> → !==, div → Math.trunc, mod → %, and/or/not → &&/||/!
• I/O builtins: writeln → console.log, write → process.stdout.write

The accepted Pascal grammar is bounded by what pascal-parser currently parses.

License

MIT © Damian Sire