Execute HQ9+/E: Difference between revisions

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{{implementation|HQ9+}}{{collection|RCHQ9+}}~~[[Category:E]]~~

[[User:Kevin Reid|The original author of this example]] would like to note the following deficiencies in [http://www.cliff.biffle.org/esoterica/hq9plus.html the HQ9+ specification]:

[[User:Kevin Reid|The original author of this example]] (written in [[E]]) would like to note the following deficiencies in [http://www.cliff.biffle.org/esoterica/hq9plus.html the HQ9+ specification]:

* The treatment of unrecognized characters other than whitespace is unspecified. However, the only implementation provided, in ~~Ocaml~~, rejects them, so this implementation also does. Additionally, rejecting unknown characters ensures that the compiler will not incorrectly compile HQ9+ programs using future extensions.

* The treatment of unrecognized characters other than whitespace is unspecified. However, the only implementation provided, in [[OCaml]], rejects them, so this implementation also does. Additionally, rejecting unknown characters ensures that the compiler will not incorrectly compile [[HQ9+]] programs using future extensions.

* While the given "qqqq" example implies that whitespace (specifically, trailing newlines) is permissible and that operation codes are case-insensitive, neither of these are explicitly stated.

* The initial value of the accumulator is unspecified. This implementation has chosen 11472, which is of course the value such that executing the HQ9+ program "HQ9+" will result in the accumulator having a value equal to the length of the program's output.