st04

## ConstrainedValues.cs
    public interface IConstraint<T>
    {
        bool Satisfies(T value);
    }
    public class Constrained<T, Constraint>
        where Constraint : IConstraint<T>, new()
    {
        public static bool TryCreate(T val, out Constrained<T, Constraint> result)
        {
            var c = new Constraint();

## Option.cs
   public static class Option
    {
        public static Option<T> Some<T>(T item)
            => new Option<T>(item);
        public static Option<T> None<T>()
            => new Option<T>();
    }
    public struct Option<T>
    {
        private readonly T value;

## introduction-to-parser-combinators.md

      
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                yelouafi
                / introduction-to-parser-combinators.md
            
            
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    In this tutorial we're going to build a set of parser combinators.
What is a parser combinator?

We'll answer the above question in 2 steps.

What is a parser?
and, what is a parser combinator?

So first question: What is parser?

  
## gist:2999707
<!doctype html>
<title>Site Maintenance</title>
<style>
  body { text-align: center; padding: 150px; }
  h1 { font-size: 50px; }
  body { font: 20px Helvetica, sans-serif; color: #333; }
  article { display: block; text-align: left; width: 650px; margin: 0 auto; }
  a { color: #dc8100; text-decoration: none; }
  a:hover { color: #333; text-decoration: none; }
</style>
	public interface IConstraint<T>
	{
	bool Satisfies(T value);
	}
	public class Constrained<T, Constraint>
	where Constraint : IConstraint<T>, new()
	{
	public static bool TryCreate(T val, out Constrained<T, Constraint> result)
	{
	var c = new Constraint();
	public static class Option
	{
	public static Option<T> Some<T>(T item)
	=> new Option<T>(item);
	public static Option<T> None<T>()
	=> new Option<T>();
	}
	public struct Option<T>
	{
	private readonly T value;
	<!doctype html>
	<title>Site Maintenance</title>
	<style>
	body { text-align: center; padding: 150px; }
	h1 { font-size: 50px; }
	body { font: 20px Helvetica, sans-serif; color: #333; }
	article { display: block; text-align: left; width: 650px; margin: 0 auto; }
	a { color: #dc8100; text-decoration: none; }
	a:hover { color: #333; text-decoration: none; }
	</style>