Orkuncakilkaya
790eda6f73
Types phase 3 — the option/result safety pair. result/ok/err/try shipped in #46; this adds its companion option: - some(v) -> option (present value; any i32-width scalar) - none() -> option (empty; no magic -1 sentinel) - is_some / is_none -> bool - unwrap_or(o, fallback) -> int A heap %Option = { i32 present, i32 value }, bare builtins guarded by find_fn (a user fn of the same name still wins), gated by g_uses_option so unused programs compile byte-identically — same idiom as result. Wired: emit_call codegen + %Option decl (emit_decl) + g_uses_option (emit_core), reseeded seed, vocabulary sync (header/JetBrains/TextMate), builtin docs + inventory, and a self-asserting example (examples/library/optionresult.ludic + feat_case). All suites green incl. golden renders byte-identical and the bootstrap fixpoint. Tagged-union enums (variant payloads + binding match + exhaustiveness) are the deep type-system feature, split out to #56. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
763 B
763 B
| id | name | category | kind | tokens | sig | tip | order |
|---|---|---|---|---|---|---|---|
| fn-none | none | builtins | builtin | none | none() -> option | The empty option — a missing value. | 17 |
The empty option — a missing value with no sentinel. Return it when there is nothing to give: no target, an empty slot, a lookup that missed. The caller distinguishes it from some with is_none / is_some, or supplies a default with unwrap_or.
program Slots {
function held(slot: int) -> option {
if slot < 0 { return none() }
return some(slot)
}
test "none is empty" {
expect_eq(is_none(held(0 - 1)), true)
}
}