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favascript.js
36 lines (34 loc) · 937 Bytes
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favascript.js
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const argv = require('yargs')
.usage('$0 [-a] [-s] [-g] filename')
.boolean(['a', 's', 'g', 'o'])
.describe('a', 'parse, then generate an AST')
.describe('s', 'perform semantic analysis')
.describe('g', 'generate Javascript code')
.describe('o', 'optimize Favascript code')
.demand(1)
.argv;
const fs = require('fs');
const path = require('path');
const parser = require(path.resolve('./parser.js'));
const generator = require(path.resolve('./generator.js'));
fs.readFile(argv._[0], 'utf-8', (err, text) => {
let program = parser(text);
if (argv.a) {
console.log(program.toString());
return;
}
if (argv.s) {
program.analyze();
return;
}
if (argv.g) {
program.analyze();
console.log(program.gen());
return;
}
if (argv.o) {
program.analyze();
console.log(program.optimize());
return;
}
})