_Core/Lang/Plugins/Parser/DatePlugin.cs

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using ComLib.Lang;


namespace ComLib.Lang.Extensions
{

    /* *************************************************************************
    <doc:example>
    // Date plugin allows date expressions in a friendly format like January 1 2001;
    // Following formats are supported.
    
    var date = January 1st 2012;
    var date = Jan
    date = jan 10
    date = Jan 10 2012
    date = Jan 10, 2012
    date = Jan 10th
    date = Jan 10th 2012
    date = Jan 10th, 2012
    date = January 10
    date = January 10, 2012
    date = January 10th
    date = January 10th, 2012
    date = January 10th 2012 at 9:20 am; 
    
    if today is before December 25th 2011 then
	    print Still have time to buy gifts
    </doc:example>
    ***************************************************************************/

    /// <summary>
    /// Combinator for handling dates.
    /// </summary>
    public class DatePlugin : ExprPlugin
    {
        private static Dictionary<string, int> _months;


        static DatePlugin()
        {
            _months = new Dictionary<string, int>();
            _months["jan"] = 1;
            _months["feb"] = 2;
            _months["mar"] = 3;
            _months["apr"] = 4;
            _months["may"] = 5;
            _months["jun"] = 6;
            _months["jul"] = 7;
            _months["aug"] = 8;
            _months["sep"] = 9;
            _months["oct"] = 10;
            _months["nov"] = 11;
            _months["dec"] = 12;
            _months["january"] = 1;
            _months["february"] = 2;
            _months["march"] = 3;