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wren/test/core/string_byte_sequence/iterate.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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// Bytes:
// 012345678
// Chars: sø mé ஃ
var bytes = "søméஃ".bytes
System.print(bytes.iterate(null)) // expect: 0
System.print("".bytes.iterate(null)) // expect: false
System.print(bytes.iterate(0)) // expect: 1
System.print(bytes.iterate(1)) // expect: 2
System.print(bytes.iterate(2)) // expect: 3
System.print(bytes.iterate(3)) // expect: 4
System.print(bytes.iterate(4)) // expect: 5
System.print(bytes.iterate(5)) // expect: 6
System.print(bytes.iterate(6)) // expect: 7
System.print(bytes.iterate(7)) // expect: 8
System.print(bytes.iterate(8)) // expect: false
// Out of bounds.
System.print(bytes.iterate(123)) // expect: false
System.print(bytes.iterate(-1)) // expect: false