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wren/test/language/inheritance/inherited_fields_in_closure.wren
Bob Nystrom 58e4d26648 "IO" -> "System".
Get rid of the separate opt-in IO class and replace it with a core
System class.

- Remove wren_io.c, wren_io.h, and io.wren.
- Remove the flags that disable it.
- Remove the overloads for print() with different arity. (It was an
  experiment, but I don't think it's that useful.)
- Remove IO.read(). That will reappear using libuv in the CLI at some
  point.
- Remove IO.time. Doesn't seem to have been used.
- Update all of the tests, docs, etc.

I'm sorry for all the breakage this causes, but I think "System" is a
better name for this class (it makes it natural to add things like
"System.gc()") and frees up "IO" for referring to the CLI's IO module.
2015-09-15 07:46:09 -07:00

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class Foo {
construct new() { _field = "Foo field" }
closeOverFooGet {
return Fn.new { Fn.new { _field } }
}
closeOverFooSet {
return Fn.new { Fn.new { _field = "new foo value" } }
}
}
class Bar is Foo {
construct new() {
super()
_field = "Bar field"
}
closeOverBarGet {
return Fn.new { Fn.new { _field } }
}
closeOverBarSet {
return Fn.new { Fn.new { _field = "new bar value" } }
}
}
var bar = Bar.new()
System.print(bar.closeOverFooGet.call().call()) // expect: Foo field
System.print(bar.closeOverBarGet.call().call()) // expect: Bar field
bar.closeOverFooSet.call().call()
System.print(bar.closeOverFooGet.call().call()) // expect: new foo value
System.print(bar.closeOverBarGet.call().call()) // expect: Bar field
bar.closeOverBarSet.call().call()
System.print(bar.closeOverFooGet.call().call()) // expect: new foo value
System.print(bar.closeOverBarGet.call().call()) // expect: new bar value