# precedence of operators

One aspect of parsing precedence is associativity. A left-associative operator is one, such as *, with the property that x * y * z is parsed as (x * y) * z. A right-associative operator is one, such as =, with the property that x = y = z is parsed as x = (y = z). These operators are left associative: # #? % & * ** + ++ , - . .. ..< .? / // << @@ ^ ^** ^^ _ | ||, and these operators are right associative: != -> : := ; < <- <= <== <=== <==> = =!= == === ===> ==> => > >= >> ? @ \ \\ |- and or SPACE xor .

Here are the operators arranged in order of increasing parsing precedence. For example, * has higher parsing precedence than +, and hence 2+3*5 is parsed as though it had been written as 2+(3*5). The symbol SPACE represents the operator that is used when two things are adjacent in program code.

  8 ; 10 , 14 -> := <- = => >> 18 << 20 |- 22 <=== ===> 24 <==> 26 <== ==> 28 or 30 xor 32 and 34 not 36 != < <= =!= == === > >= ? 38 || 40 : 42 | 44 ^^ 46 & 48 .. ..< 50 + ++ - 52 ** 56 % * / // \ \\ 58 @ 60 SPACE 62 (*) 64 @@ 66 ^* _* ~ 68 # #? . .? ^ ^** _ 70 !