LR(0) parser - left to right scanning of the input and rightmost derivation of grammar symbols.
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<h3>LR(0) parser composed of five stages.</h3>
 <ul>
 	<li> finding the FIRST set of grammar symbols. </li>
 	<li>  finding the FOLLOW set of grammar symbols. </li>
 	<li> from initial state apply the closure rule to find all the possible input states. </li>
 	<li>  construct a parsing table from states obtained by applying closure. </li>
 	<li> parse the input string by using the parsing table.</li>
 </ul>

All the above stages are implemented and the GUI is provided making it as a tool for learning the<b> LR(0) </b>parsing. 

<br>
Each of the above stage outputs can be seen at a click of corresponding button.

language used: python 2.7 and PyQt4 frame work.
<h3>To execute </h3>
<b>$ python Gui_main.py</b>
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<h2> Tool </h2>
<img src="https://dl.dropboxusercontent.com/u/109288873/LR0.png">