Figure:
Precedence groups for binary operators; higher groups have
higher precedence.
Figure 2 identifies the precedence groups for the binary operators defined in the standard library and indicates which precedence groups take precedence over lower precedence groups (groups higher up have higher precedence than groups lower down, which they point to). All precedence groups have left associativity except for the central group of comparison operators which are non-associative and the ** exponentiation operator which is right-associative.
The +_ov et al. operators have the same precedence as the corresponding
non-_ov operators.
Explicit parenthesization is required in expressions which mix operators that are either non-associative or unordered by the precedence partial order.