/* Copyright (c) <2009> <Newton Game Dynamics>
* 
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
* 
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely
*/


// very simple sample LR(1) grammar with conflicts

%union 
{
	class dUserVariable: public string
	{
		dUserVariable () 
			:string("")
		{
		}
		
		dUserVariable (Token token, const char* const text)
			:m_token(token), m_data (text) 
		{
		}
		Token m_token;
	};
}

%token id
%start E1

%left	'+' '-'
%left	'*' '/'

%%
E1	: E				{printf ("%s\n", $1.m_data.c_str());}
	;

E	: E '+' E		{$$.m_data = $1.m_data + " + " + $3.m_data;}
//	| E '-' E		{$$.m_data = $1.m_data + " + " + $3.m_data;}
	| E '*' E		{$$.m_data = $1.m_data + " * " + $3.m_data;}
//	| E '/' E		{$$.m_data = $1.m_data + " * " + $3.m_data;}
	| '(' E ')'		{$$ = $2;}
	| id			{$$ = $1;}
	;

		
%%