A unit of measure representing binding power for operators. Binding power is used in Pratt parsing to determine the precedence and associativity of operators. Higher binding power indicates higher precedence. By convention, binding powers are odd numbers N with the next higher even number indicating the operator associativity. A left-associative operator with binding power N has left power N and right power N + 1. A right-associative operator with binding power N has left power N + 1 and right power N. A non-associative operator with binding power N has both left and right power N.