Scala Language Operators in Scala Operator Precedence
Example
| Category | Operator | Associativity |
|---|---|---|
| Postfix | () [] | Left to right |
| Unary | ! ~ | Right to left |
| Multiplicative | * / % | Left to right |
| Additive | + - | Left to right |
| Shift | >> >>> << | Left to right |
| Relational | > >= < <= | Left to right |
| Equality | == != | Left to right |
| Bitwise and | & | Left to right |
| Bitwise xor | ^ | Left to right |
| Bitwise or | | | Left to right |
| Logical and | && | Left to right |
| Logical or | || | Left to right |
| Assignment | = += -= *= /= %= >>= <<= &= ^= |= | Right to left |
| Comma | , | Left to right |
Programming in Scala gives the following outline based on the 1st character in the operator. E.g. > is the 1st character in the operator >>>:
| Operator |
|---|
| (all other special characters) |
* / % |
+ - |
: |
= ! |
< > |
& |
^ |
| |
| (all letters) |
| (all assignment operators) |
The one exception to this rule concerns assignment operators, e.g. +=, *=, etc. If an operator ends with an equal character (=) and is not one of the comparison operators <=, >=, == or !=, then the precedence of the operator is the same as simple assignment. In other words, lower than that of any other operator.
