1 parser grammar VecMath_Parser; 2 3 options { 4 output=AST; 5 } 6 7 tokens { 8 SHIFT; 9 VEC; 10 } 11 12 public 13 prog 14 : stat+ ; 15 16 stat 17 : ID EQUAL expr -> ^( EQUAL ID expr ) 18 | PRINT^ expr 19 ; 20 21 expr 22 : multExpr ( PLUS^ multExpr )* 23 ; 24 25 multExpr 26 : primary ( ( MULT^ | DOT^ ) primary )* 27 ; 28 29 primary 30 : INT 31 | ID 32 | OPEN_SQUARE expr ( COMMA expr )* CLOSE_SQUARE -> ^( VEC expr+ ) 33 | OPEN_BRACE expr CLOSE_BRACE -> expr 34 ; 35 36
