Class Lambda
extends Object
A lambda, or closure.
Use this as a type for Lambdas (
:: ...).Lambdas are also known as closures in other languages.
Lambdas are executable pieces of code that can be passed around in a program and called for execution. A lambda can reference globals, fields, and variables. Local variables can be captured.
Aliases
- Closure
Advanced
Lambdas and blocks both represent some code that can be called at a later point. This is why they look syntactically similar. However, contrary to blocks, lambdas can survive the function that created it. They can be returned, or stored in fields and globals.
When a lambda is called, the function that created it might not be alive anymore. As such, lambdas can not use non-local returns.
Class summary
| call -> any | Calls this lambda with no arguments. |
|---|---|
| call a/any -> any | Calls this lambda with one argument. |
| call a/any b/any -> any | Calls this lambda with two argument. |
| call a/any b/any c/any -> any | Calls this lambda with three arguments. |
| call a/any b/any c/any d/any -> any | Calls this lambda with four arguments. |
| stringify -> any | |
| hash-code -> any | Returns the hash code of this lambda. |
| operator == other/any -> bool | Whether this object is equal to the other. |
Methods
Calls this lambda with no arguments.
Calls this lambda with one argument.
Calls this lambda with two argument.
Calls this lambda with three arguments.
Calls this lambda with four arguments.
Returns the hash code of this lambda.
Whether this object is equal to the other.
Inheritance
Classes overwrite this operator to get an equality specific to their needs. Equality operators often compare the type and field contents. For example:
class Pin:
number/int
constructor .number:
operator == other:
if other is not Pin: return false
return number == other.number
A class doesn't have to follow the above format, but it must keep the operator in sync with any
hash-code method. That is, if a class has a hash-code member, then the equality and hash-code must agree. If two instances are equal (a == b), then their hash codes must also be equal (a.hash-code == b.hash-code).