Files
wren/test/if/truth.wren
T
Bob Nystrom a5c4918a75 feat: treat null as falsey in conditional and logical operator branches
Update the VM interpreter to treat null as falsey alongside false in if, while, for, and logical AND/OR operations. Remove the TODO comment and adjust short-circuit logic in OP_JUMP_IF and OP_JUMP_IF_NOT branches. Refactor existing test files into subdirectories (if/, logical_operator/, while/) and add dedicated truthiness tests for each construct. Remove old test/if.wren and update and/or tests to exclude null/0/"" truthiness checks now that null is falsey.
2014-01-21 02:12:55 +00:00

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class Iter {
new(value) { _value = value }
iterate(iterator) { return _value }
iteratorValue(iterator) { return "value" }
}
// False and null are false.
for (n in new Iter(false)) {
IO.print("bad")
break
}
for (n in new Iter(null)) {
IO.print("bad")
break
}
// Everything else is true.
for (n in new Iter(true)) {
IO.print("true") // expect: true
break
}
for (n in new Iter(0)) {
IO.print(0) // expect: 0
break
}
for (n in new Iter("")) {
IO.print("string") // expect: string
break
}