| Bootstrapping a simple compiler from nothing | |
| ============================================ | |
| This document describes how I implemented a tiny compiler for a toy | |
| programming language somewhat reminiscent of C and Forth. The funny | |
| bit is that I implemented the compiler in the language itself without | |
| directly using any previously existing software. So I started by | |
| writing raw machine code in hexadecimal and then, through a series of | |
| bootstrapping steps, gradually made programming easier for myself | |
| while implementing better and better "languages". |
| /* | |
| * Copyright (C) 2006 Edmund GRIMLEY EVANS <edmundo@rano.org> | |
| * | |
| * This program is free software; you can redistribute it and/or modify | |
| * it under the terms of the GNU General Public License as published by | |
| * the Free Software Foundation; either version 2 of the License, or | |
| * (at your option) any later version. | |
| * | |
| * This program is distributed in the hope that it will be useful, | |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| polygon(points=[ | |
| [0,0], | |
| [0,-1.64], | |
| [2.66,-4.3], | |
| [8.26,-4.3], | |
| [11,-1.64], | |
| [11,0] | |
| ]); |
TLA+ is a formal modeling language for algorithms running in a distributed system.
It would be interesting to create animations and sequence diagrams from modeling languages so that users could get an intuitive understanding of the protocols being modeled.
| { | |
| "type" : "record", | |
| "name" : "twitter_schema", | |
| "namespace" : "com.miguno.avro", | |
| "fields" : [ { | |
| "name" : "username", | |
| "type" : "string", | |
| "doc" : "Name of the user account on Twitter.com" | |
| }, { | |
| "name" : "tweet", |
| use std::collections::HashMap; | |
| type BuzzFn<'a> = Box<(Fn(i32) -> String) + 'a>; | |
| fn mbfn<'a, F>(f: F) -> BuzzFn<'a> | |
| where F: Fn(i32) -> String + 'a { | |
| Box::new(f) as BuzzFn | |
| } | |
| fn do_buzz() { |
| /* file: "tinyc.c" */ | |
| /* originally from http://www.iro.umontreal.ca/~felipe/IFT2030-Automne2002/Complements/tinyc.c */ | |
| /* Copyright (C) 2001 by Marc Feeley, All Rights Reserved. */ | |
| #include <stdio.h> | |
| #include <stdlib.h> | |
| #include <string.h> | |
| /* |
Some older toys take the now non-standard C size batteries. These adapters allow the use of AA. Some times will not run properly on the lower voltage NiMH batteries, :(
| /** Apache Licensed **/ | |
| function t2() { | |
| aref = document.getElementsByTagName("a"); | |
| var result = []; | |
| for(i = 0; i < aref.length; i++) { | |
| var t = aref[i]; | |
| if (t.href.includes("forum")) { | |
| result.push(t.href); | |
| } | |
| } |
| def do(cmd): | |
| try: | |
| return (True, cmd()) | |
| except Exception as e: | |
| return (False, e) | |
| do(lambda x: os.access(".",123123123123)) |