Daniel P. Wright dpwright

Monadic operations in C++

This began as a further attempt to implement the Maybe monad in C++, but quickly spiralled out of control and now includes an implementation of the List monad as well (using std::list!). This is really for my own amusement rather than to try and do anything useful with them. It also gave me an excuse to try out C++ 11 lambda functions for the first time.

My original implementation defined a macro called MBind which caused a number of problems -- thankfully [PJayB][pjayb] managed to find a way around that so

	#!/usr/bin/ruby
	#GistID: 3779324

	require 'escape'

	exit if ARGV.empty?

	current_branch = `git symbolic-ref -q HEAD`.sub(/^refs\/heads\//, "").strip
	exit if current_branch.empty?

	$git init repo1
	Initialized empty Git repository in /home/daniel/liamtest/repo1/.git/
	$cd repo1
	$git ci --allow-empty -m "Commit on master"
	[master (root-commit) cf699b0] Commit on master
	$git co --orphan another-branch
	Switched to a new branch 'another-branch'
	$git ci --allow-empty -m "Commit on another-branch"
	[another-branch (root-commit) 06f7586] Commit on another-branch
	$cd ..

	(def app
	(-> (handler/site
	(friend/authenticate app-routes
	{:credential-fn users/authenticate
	:workflows [(workflows/interactive-form)]}))
	(dieter/asset-pipeline)))

	/* Basic tuple definitions */

	#define ctuple1(a) union { struct { a hd; }; struct { a idx0; }; }
	#define ctuple2(a, b) union { struct { a hd; ctuple1(b) tl; }; \
	struct { a idx0; b idx1; }; }

	#define ctuple3(a, b, c) union { struct { a hd; ctuple2(b, c) tl; }; \
	struct { a idx0; b idx1; c idx2; }; }

	#define ctuple4(a, b, c, d) union { struct { a hd; ctuple3(b, c, d) tl; }; \

	#include <iostream>
	#include <cassert>
	#include <cmath>

	using namespace std;

	template<typename a> class Maybe
	{
	public:
	static Maybe<a> Just(a value) { return Maybe(value); }

	Watchdog
	========

	Watchdog is a simple utility to spawn and monitor a process, respawning it if it
	dies or is killed for whatever reason. This is useful if you have a daemon
	process that may encounter an unexpected error, or even just as a quick 'n' easy
	upgrade mechanic -- just pop the new executable over the old one and shut the
	process down!

	There are a million of these, but I needed something quick 'n' dirty to

	# Windows constructs the %PATH% environment variable by appending the user
	# PATH to the system PATH, which means you can't override system-level programs
	# with your own, user-specific version.

	# To fix this, save this script and set it to run on logon by following these
	# instructions: http://technet.microsoft.com/en-us/library/cc770908.aspx
	# (If step 1 is a mystery to you, go to Start->Run and type "gpedit.msc")

	# Requires Windows 7
	# If your path is longer than 1024 characters, this might not work :-(