grammar Calculator;

@parser::members
{
    protected const int EOF = Eof;
}

@lexer::members
{
    protected const int EOF = Eof;
    protected const int HIDDEN = Hidden;
}

/*
 * Parser Rules
 */

prog: expr+ ;

expr : NOT expr                 # Not
     | expr op=('**') expr      # Potencia
     | expr op=('AND') expr     # AND
     | expr op=('OR') expr      # OR
     | expr op=('*'|'/') expr   # MulDiv
     | expr op=('+'|'-') expr   # AddSub
     | INT                      # int
     | TRUE                     # true
     | FALSE                    # false
     | '(' expr ')'             # parens
     ;

/*
 * Lexer Rules
 */
TRUE : 'true';
AND : 'and';
OR : 'or';
FALSE : 'false';
NOT : '!';
INT : [0-9]+;
MUL : '*';
DIV : '/';
ADD : '+';
SUB : '-';
WS
    :   (' ' | '\r' | '\n') -> channel(HIDDEN)
    ;