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78655c68b0
This allows "%(...)" inside a string literal to interpolate the stringified result of an expression. It doesn't support custom interpolators or format strings, but we can consider extending that later.
78 lines
1.5 KiB
Plaintext
78 lines
1.5 KiB
Plaintext
class Api {
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foreign static finalized
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}
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// Class with a default constructor.
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foreign class Counter {
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construct new() {}
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foreign increment(amount)
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foreign value
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}
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var counter = Counter.new()
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System.print(counter.value) // expect: 0
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counter.increment(3.1)
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System.print(counter.value) // expect: 3.1
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counter.increment(1.2)
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System.print(counter.value) // expect: 4.3
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// Foreign classes can inherit a class as long as it has no fields.
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class PointBase {
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inherited() {
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System.print("inherited method")
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}
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}
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// Class with non-default constructor.
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foreign class Point is PointBase {
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construct new() {
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System.print("default")
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}
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construct new(x, y, z) {
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System.print("%(x), %(y), %(z)")
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}
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foreign translate(x, y, z)
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foreign toString
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}
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var p = Point.new(1, 2, 3) // expect: 1, 2, 3
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System.print(p) // expect: (1, 2, 3)
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p.translate(3, 4, 5)
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System.print(p) // expect: (4, 6, 8)
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p = Point.new() // expect: default
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System.print(p) // expect: (0, 0, 0)
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p.inherited() // expect: inherited method
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var error = Fiber.new {
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class Subclass is Point {}
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}.try()
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System.print(error) // expect: Class 'Subclass' cannot inherit from foreign class 'Point'.
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// Class with a finalizer.
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foreign class Resource {
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construct new() {}
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}
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var resources = [
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Resource.new(),
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Resource.new(),
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Resource.new()
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]
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System.gc()
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System.print(Api.finalized) // expect: 0
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resources.removeAt(-1)
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System.gc()
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System.print(Api.finalized) // expect: 1
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resources.clear()
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System.gc()
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System.print(Api.finalized) // expect: 3
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