{"id":"language--unavailable-syntax","name":"Deliberately unavailable language features","owner":"yeho","package":"language","kind":"language","signature":"Generic algorithm -> concrete function or named thing\nSlice/view -> list, buffer, start + count\nInterpolation -> Text.Format\nvalue += 1 -> value = value + 1\nComputed property -> method\nTruthiness -> explicit bool condition\nAllocation/free -> owned value or runtime resource API","description":"Yeho Core 2026.1 explicitly does not admit generics, slices, interpolation, alternate numeric literals, compound assignment, computed properties, operator overloading, truthiness, or raw allocation/free.","context":"Use the simple supported forms shown here. Treat a compiler rejection as a boundary, not an invitation to advertise unfinished syntax.","parameters":[],"returns":"","members":[],"tags":["+=","boundaries","cpu","free","generics","interpolation","language","malloc","operator","slices","yeho"],"updated":"2026-09-09","source":{"repository":"yeho","path":"docs/language/conformance-2026.1.json unavailable classifications"},"status":"unavailable","notes":["Unavailable means no stable or experimental product contract exists.","The exact list is machine-readable in the conformance manifest."],"examples":[{"id":"complete","title":"Complete program","description":"A complete example you can paste into start.yh.","code":"// assert is not admitted; validate explicitly.\nint score = 10\nif score < 0 { Console.Error(\"Score must be nonnegative\") }\nelse { Console.Log(Text.From(score)) }\n","tags":["cpu","language"],"run":"cpu-oracle","expected":null,"verifyRun":false,"manifest":"manifestVersion = \"2\"\npackage = \"api.example.language__unavailable_syntax\"\nversion = \"0.1.0\"\nlanguageEdition = \"yeho-core-2026.1\"\n\n[app]\nkind = \"headless\"\n","verification":"type checked","sha256":"091aea22a2e0cbc4e2aaa24c61b3c8cdd662ea3d7a97cc2321d3b75df2f59a78","checked":"2026-09-09","diagnostic":"","observedOutput":null,"checkedBackend":null}],"searchTerms":[],"url":"https://demonhunterlabs.com/academy/api?item=language--unavailable-syntax","json":"https://demonhunterlabs.com/reference/items/language--unavailable-syntax.json","markdown":"https://demonhunterlabs.com/reference/text/language--unavailable-syntax.md"}