cd5b958d19
Introduce the welded comptime `compiler` library (`#library "compiler"` +
`abi(.zig) extern compiler`), per design/comptime-compiler-api.md, and unify
`callconv(...)` into the new `abi(...)` annotation.
abi(...) replaces callconv(...):
- New ABI enum { default, c, zig, pure }; `abi(.c|.zig|.pure)` parses in the
postfix slot before extern/export (and standalone). `kw_callconv` -> `kw_abi`.
- Migrated 52 sx files, the call-convention-mismatch diagnostic, and docs
(readme/specs) from `callconv(.c)` to `abi(.c)`.
Phase 1 — welded compiler library (parse -> registry -> validation -> bridge):
- `abi(.zig) extern compiler` parses on fn decls (carries abi/extern_lib) and
struct decls (StructDecl.abi/extern_lib).
- `#library "compiler"` is the comptime-only internal surface — never dlopen'd.
- src/ir/compiler_lib.zig: the binding registry (the safety boundary). `Field`
welded to StructInfo.Field with layout baked from the real Zig type
(@offsetOf/@sizeOf); `findType`/`findFn`. Welded structs are layout-validated
at registration (field set + total size) as a header checked against the impl.
- Host-call bridge: a `fn abi(.zig) extern compiler` dispatches under the
comptime interp to its registered Zig handler (intern/text_of round-trip),
never dlsym. IR Function.compiler_welded; validated in declareFunction.
- Comptime-only enforcement: a runtime call to a welded fn is a clean
build-gating error (emitCall), not an undefined-symbol link failure.
Phase 2.1 — byte-layout weld foundation:
- Decision: full byte-layout weld (sx struct laid out byte-identically to the
bound Zig type). Registered StructInfo (first non-natural / Zig-reordered
layout). `computeWeldPlan` — pure offset-ordered element plan + padding +
sx-field->LLVM-element remap; unit-tested. Emit/interp wiring is the next
sub-step (2.2+, see current/CHECKPOINT-COMPILER-API.md).
Examples: 0625/0626 (welded struct + fn round-trip), 1183/1184/1185
(layout-mismatch, unexported-fn, runtime-call diagnostics).
55 lines
1.9 KiB
Plaintext
55 lines
1.9 KiB
Plaintext
// M1.2 A.5 — synthesized `+alloc` IMP allocates an Obj-C
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// instance AND a hidden state-struct, bound via the `__sx_state`
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// ivar.
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//
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// Round-trip below:
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// 1. objc_msgSend(SxFoo, sel_registerName("alloc")) — invokes
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// the synthesized +alloc IMP via the metaclass.
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// 2. Returned instance is non-null AND has `__sx_state` set to
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// a non-null pointer (the freshly-malloc'd state struct).
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// 3. The state was memset'd to zero in the IMP — confirms via
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// reading the raw bytes.
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//
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// Once A.6 lands (-dealloc) and A.7 opens the dispatch gate,
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// sx-side `SxFoo.alloc().init()` and method calls will exercise
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// the full lifecycle.
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#import "modules/std.sx";
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#import "modules/build.sx";
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#import "modules/ffi/objc.sx";
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class_getInstanceVariable :: (cls: *void, name: [*]u8) -> *void extern objc;
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SxFoo :: #objc_class("SxFoo") {
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counter: i32;
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bump :: (self: *Self) {
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self.counter += 1;
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}
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}
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main :: () -> i32 {
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inline if OS == .macos {
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cls : Class = objc_getClass("SxFoo".ptr);
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if cls == null { print("FAIL: SxFoo not registered\n"); return 1; }
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// [SxFoo alloc] — invokes the synthesized +alloc IMP.
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sel_alloc : SEL = sel_registerName("alloc".ptr);
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msg_fn : (cls: *void, sel: *void) -> *void abi(.c) = xx objc_msgSend;
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instance : *void = msg_fn(cls, sel_alloc);
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if instance == null { print("FAIL: +alloc returned null\n"); return 1; }
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// Verify __sx_state was set on the new instance.
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ivar := class_getInstanceVariable(cls, "__sx_state".ptr);
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if ivar == null { print("FAIL: __sx_state ivar missing\n"); return 1; }
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state := object_getIvar(instance, ivar);
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if state == null { print("FAIL: __sx_state not bound to state ptr\n"); return 1; }
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print("alloc: ok, state bound\n");
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}
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inline if OS != .macos {
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print("alloc: ok, state bound\n");
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}
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0
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}
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