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).
44 lines
1.5 KiB
Plaintext
44 lines
1.5 KiB
Plaintext
// Phase 3 step 3.0 (PLAN-FFI.md): `inst.method(args)` on an
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// `#objc_class`-typed receiver lowers to `objc_msg_send` with a derived
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// selector. This test covers the niladic shape: the sx-side method name
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// is used verbatim as the selector (`length` → `length`).
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//
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// Test pattern mirrors `ffi-objc-call-08-multi-keyword.sx`: synthesize a
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// fresh class at runtime via `objc_allocateClassPair` + `class_addMethod`,
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// declare the sx-side `#objc_class` against the same name, then invoke
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// the DSL form. On macOS this exercises the real Obj-C runtime; on
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// other platforms the test skips.
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//
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// Pre-3.0: the dispatch bails at lower.zig with "method calls on
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// 'objc_class' runtime not yet supported (Phase 3/4)". Snapshot captures
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// that diagnostic.
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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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SxProbeNiladic :: #objc_class("SxProbeNiladic") extern {
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length :: (self: *Self) -> i32;
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}
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length_imp :: (self: *void, _cmd: *void) -> i32 abi(.c) {
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42
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}
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main :: () -> i32 {
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inline if OS == .macos {
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ns_object := objc_getClass("NSObject".ptr);
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cls := objc_allocateClassPair(ns_object, "SxProbeNiladic".ptr, 0);
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sel := sel_registerName("length".ptr);
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class_addMethod(cls, sel, xx length_imp, "i@:".ptr);
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objc_registerClassPair(cls);
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inst : *SxProbeNiladic = xx class_createInstance(cls, 0);
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n := inst.length();
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print("length = {}\n", n);
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}
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inline if OS != .macos {
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print("skipped (not macos)\n");
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}
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0
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}
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