0977dc16cb
Introduce `static` (class-level) members to the Blaise language using the `static` keyword — never an overloaded `class` keyword. A `static` member is type-associated, not instance-associated: static methods take no implicit Self, and static vars/consts are a single shared storage slot. Surface, on classes and records: * `static var` / `static const` — section form (`private static var`) or as a bare `static` continuing the current visibility. Static vars lower to one shared global slot (mangled `<Unit><Type>_<Name>`), zero-initialised, NOT an instance field. Class- and interface-typed static vars are supported (the canonical singleton storage) with store-time ARC and a program-exit release; string and dynamic-array static vars remain deferred. * `static function` / `static procedure` — per-member prefix or section form; no implicit Self. Out-of-line bodies are `static function T.M`. * `static property` — sugar over a static getter (no Self at the call site). * record `static function` — the factory / namespaced-function form (`TPoint.Make(x, y): TPoint`), required to be marked `static` explicitly. There is no `static constructor` / `static destructor` (rejected at parse): the zero-initialisation guarantee covers nil singletons, and eager setup belongs in a unit's `initialization`/`finalization` (the Swift/Rust/Go model, not Java/C#/Delphi). `class` is never a member qualifier. Implementation spans the full pipeline: * parser — `static` is a soft keyword; section qualifier (followed by var/const) and per-member prefix forms; `static constructor/destructor` rejected. * semantic — static vars register a shared global (bare + qualified) under a mangled emit label; static methods skip the Self binding; qualified `Type.StaticVar` / `Type.StaticProp` / `Type.StaticMethod()` resolution. * QBE + native x86-64 codegen — no-Self method signatures and call sites (including the record-return sret and >6-arg paths), shared global data slots, qualified static var/property reads, and class/interface static-var release at program exit. * `.bif` interface format — IsClassVar/ClassVarEmitName, property IsStatic, and record/class const decls are encoded (BLAISE-IFACE version 2 -> 3). * OPDF debug info — static vars are emitted as `recGlobalVar`s under their mangled label so a debugger can print `TFoo.FInstance`. Static members currently work within a single program/unit; carrying them across separately-compiled units (export clone, import, TRoutineSig.IsStatic) is a tracked follow-up — the .bif wire format is already in place for it. Tests: cp.test.staticmembers (parser + semantic + IR) and cp.test.e2e.staticmembers (compile+run on both backends). Full suite green on QBE- and native-built runners (3908 tests); all fixpoints pass; bif-coverage clean. docs/grammar.ebnf and docs/language-rationale.adoc updated. |
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