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natural language date parser written in lex yacc and C

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# core
Natural Language Date/Time parser written in Lex, Yacc and C.

###Build It:
1. clone repo
2. run command "make"
3. make creates a static library called libMoment.a and an executable testParser.exe that links to the static library.

Run ./testParser.exe to try it out.

If you want to use the library in XCode you can run the script buildFatLibIOS.sh
This will build a fat library containing the library for ISO and for Simulator.  Currently only set for 9.2 sdk.

<pre>
To use it:
Add the library and TimeParser.h to your project
Include "TimeParser.h" 
Then call the method parseDateTimeString(StringToParse), which returns a double type (unix time).
You can then turn it into struct tm * with the localtime function but first would need to cast it to a time_t type.
</pre>

<h3>Example Expressions:</h3>

<h4>Simple</h4>
<ul>

<li>thursday</li>
<li>november</li>
<li>friday 13:00</li>
<li>mon 2:35</li>
<li>4pm</li>
<li>6 in the morning</li>
<li>friday 1pm</li>
<li>sat 7 in the evening</li>
<li>yesterday</li>
<li>today</li>
<li>tomorrow</li>
<li>this tuesday</li>
<li>next month</li>
<li>this morning</li>
<li>last night</li>
<li>this second</li>
<li>yesterday at 4:00</li>
<li>last friday at 20:00</li>
<li>last week tuesday</li>
<li>tomorrow at 6:45pm</li>
<li>afternoon yesterday</li>
<li>thursday last week</li>

</ul>
<h4>Complex</h4>
<ul>
<li>3 years ago</li>
<li>5 months before now</li>
<li>7 hours ago</li>
<li>7 days from now</li>
<li>1 week hence</li>
<li>in 3 hours</li>
<li>1 year ago tomorrow</li>
<li>3 months ago saturday at 5:00 pm</li>
<li>7 hours before tomorrow at noon</li>
<li>3rd wednesday in november</li>
<li>3rd month next year</li>
<li>3rd thursday this september</li>
<li>4th day last week</li>
</ul>

<h4>Specific Dates</h4>
<ul>
<li>January 5</li>
<li>dec 25</li>
<li>may 27th</li>
<li>October 2006</li>
<li>jan 3 2010</li>
<li>March 14, 2004</li>
<li>March 14th, 2004</li>
<li>3 jan 2000</li>
<li>17 april 85</li>
<li>5/27/1979</li>
<li>27/5/1979</li>
<li>1979-05-27</li>
<li>Friday</li>
<li>5</li>
<li>4:00</li>
<li>17:00</li>
<li>0800</li>
</ul>

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