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Keyword Dictionary
Sean Swezey edited this page Oct 19, 2021
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The elephant operator. This is used as a short-circuiting exception/error/option operator. It indicates that the left side will have a value upon completion or the operator will return from the current scope with an exception/error/failure state.
In practice, this can be used much like an exception.
Used in several contexts to separate bound variables from the body of the definition.
? is as a quasi-optional indicator:
- For datatypes, it can be used to determine if the datatype is a specific value type.
- For classes and traits, it means the type can be the class/trait or
null.
datatype AorB = A | B
var example := A;
assert example.A?;
class C {}
var cls1: C := new C();
var cls2: C? := null;Creates a new datatype. It is used to create enums and record/struct types and cannot be null.
datatype NumberRecord = NumberRecord(intField: int, strField: string)
var threeRecord := NumberRecord(3, "three");forall evaluates an expression for each value provided.
Defines a mapping (ie hashmap, dictionary, etc).
Defines a set.