In addition to these operators, parentheses (()) can be used to set
precedence explicitly. All overflow, underflow, range violations, and
type mismatches are errors and will produce a compile error or runtime
exception.
The only mathematical operators allowed are addition, subtraction, and
negation of integers.
Operator Meaning
+A + B adds A and B-A - B subtracts B from A- (unary prefix)-A is the numerical negation of A
Integers can be compared against each other.
Operator Meaning
>A > B is true if A is greater than B<A < B is true if A is less than B>=A >= B is true if A is greater than or equal to B<=A <= B is true if A is less than or equal to B==A == B is true if A is equal to B!=A != B is true if A is not equal to B
Operator Meaning
&&A && B is true if A and B are both true||A || B is true if A or B are true!!A is the logical negation of A
Operator Meaning
.A.B accesses field B in struct AasA as B creates a struct B from the fields of A only if the two struct types have the same fieldssubstructA substruct B creates a struct B from the fields of A only if the fields of struct B are a subset of A
Operator Meaning
unwrapunwrap A is the value inside A if the option is Some, or else stop with a runtime exception check_unwrapSame as unwrap, but stop with a check failure instead of a runtime exception is NoneA is None is true if there is no value inside the optional Ais SomeA is Some is true if there is a value inside the optional A
Using is on a non-optional value will fail with a compile error or
runtime exception.
Priority Op
1 .2 substruct, as3 - (prefix), !, unwrap, check_unwrap4 +, - (infix)5 >, <, >=, <=, is6 ==, !=7 &&, ||