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).
49 lines
1.9 KiB
Plaintext
49 lines
1.9 KiB
Plaintext
// Backfill for Phase 1D cluster 1.28 (PLAN-FFI.md): `#objc_call(bool)`
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// against `BOOL`-returning selectors. Obj-C `BOOL` is single-byte on
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// every Apple ABI we ship to (signed char on i386, native `bool` on
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// arm64), so the slot shape is identical to `#objc_call(u8)` — this
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// test is about the source-level type being meaningful, not a
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// distinct ABI path.
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//
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// Two IMPs are installed: `yes_imp` returns true, `no_imp` returns
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// false. Both are dispatched through `#objc_call(bool)` and the
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// results are checked.
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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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yes_imp :: (self: *void, _cmd: *void) -> bool abi(.c) { true }
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no_imp :: (self: *void, _cmd: *void) -> bool abi(.c) { false }
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main :: () -> i32 {
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inline if OS == .macos {
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// Nil-recv: libobjc returns a zeroed slot, which decodes as false.
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nil_b := #objc_call(bool)(null, "isEqual:");
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print("nil bool = {}\n", nil_b);
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ns_object := objc_getClass("NSObject".ptr);
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my_cls := objc_allocateClassPair(ns_object, "SxBoolProbe".ptr, 0);
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// BOOL type-encoded as `B` (C99 _Bool) in `B@:` — implicit
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// (self: id, _cmd: SEL) return BOOL. Some toolchains prefer
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// `c` (signed char) for BOOL on i386, but `B` is unambiguous
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// on arm64 and works for runtime-registered IMPs.
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sel_yes := sel_registerName("yes".ptr);
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sel_no := sel_registerName("no".ptr);
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class_addMethod(my_cls, sel_yes, xx yes_imp, "B@:".ptr);
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class_addMethod(my_cls, sel_no, xx no_imp, "B@:".ptr);
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objc_registerClassPair(my_cls);
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instance := class_createInstance(my_cls, 0);
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y := #objc_call(bool)(instance, "yes");
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n := #objc_call(bool)(instance, "no");
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print("yes = {}\n", y);
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print("no = {}\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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