antlr-3.4/runtime/CSharp3/Sources/Antlr3.Runtime.Test/Composition/VecMath_Parser.g3

parser grammar VecMath_Parser;

options {
    output=AST;
}

tokens {
    SHIFT;    
    VEC;      
}

public
prog
   : stat+ ;

stat
   : ID EQUAL expr -> ^( EQUAL ID expr )
   | PRINT^ expr
   ;

expr
   : multExpr ( PLUS^ multExpr )*
   ;

multExpr
   : primary ( ( MULT^ | DOT^ ) primary )*
   ;

primary
   :   INT
   |   ID
   |   OPEN_SQUARE expr ( COMMA expr )* CLOSE_SQUARE -> ^( VEC expr+ )
   |   OPEN_BRACE expr CLOSE_BRACE             -> expr
   ;