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58e4d26648
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.
43 lines
960 B
Plaintext
43 lines
960 B
Plaintext
// Infinite iterator demonstrating that Sequence.where is not eager
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class FibIterator {
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construct new() {
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_current = 0
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_next = 1
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}
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iterate {
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var sum = _current + _next
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_current = _next
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_next = sum
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}
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value { _current }
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}
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class Fib is Sequence {
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construct new() {}
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iterate(iterator) {
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if (iterator == null) return FibIterator.new()
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iterator.iterate
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return iterator
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}
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iteratorValue(iterator) { iterator.value }
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}
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var largeFibs = Fib.new().where {|fib| fib > 100 }
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var iterator = null
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System.print(largeFibs is Sequence) // expect: true
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System.print(largeFibs) // expect: instance of WhereSequence
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iterator = largeFibs.iterate(iterator)
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System.print(largeFibs.iteratorValue(iterator)) // expect: 144
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iterator = largeFibs.iterate(iterator)
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System.print(largeFibs.iteratorValue(iterator)) // expect: 233
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iterator = largeFibs.iterate(iterator)
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System.print(largeFibs.iteratorValue(iterator)) // expect: 377
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