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).
42 lines
1.5 KiB
Plaintext
42 lines
1.5 KiB
Plaintext
// Register a brand-new Obj-C class from sx and prove a sx-defined method
|
|
// actually runs when dispatched through `objc_msgSend`.
|
|
//
|
|
// The flow:
|
|
// 1. `objc_allocateClassPair(NSObject, "SxThing", 0)` returns an unregistered Class.
|
|
// 2. `class_addMethod(cls, sel_hello, IMP, "v@:")` attaches our sx function as
|
|
// the `hello` method (type encoding "v@:" = void method(id self, SEL _cmd)).
|
|
// 3. `objc_registerClassPair(cls)` finalizes it.
|
|
// 4. `class_createInstance(cls, 0)` returns an `id` for a fresh instance.
|
|
// 5. typed-cast `objc_msgSend` for `void (id, SEL)` and dispatch `hello`.
|
|
// If the IMP ran, the global `g_marker` is non-zero and we return it as exit.
|
|
|
|
#import "modules/std.sx";
|
|
#import "modules/ffi/objc.sx";
|
|
|
|
g_marker : i32 = 0;
|
|
|
|
// IMP for `hello`. Must use C calling convention so `self` and `_cmd` land in
|
|
// x0 and x1 the way the Obj-C runtime expects.
|
|
hello_imp :: (self: *void, _cmd: *void) abi(.c) {
|
|
g_marker = 42;
|
|
}
|
|
|
|
main :: () -> i32 {
|
|
NSObject := objc_getClass("NSObject".ptr);
|
|
SxThing := objc_allocateClassPair(NSObject, "SxThing".ptr, 0);
|
|
sel_hello := sel_registerName("hello".ptr);
|
|
|
|
ok := class_addMethod(SxThing, sel_hello, xx hello_imp, "v@:".ptr);
|
|
if !ok { return 1; }
|
|
objc_registerClassPair(SxThing);
|
|
|
|
obj := class_createInstance(SxThing, 0);
|
|
if obj == xx 0 { return 2; }
|
|
|
|
// [obj hello]
|
|
msg : (*void, *void) -> void abi(.c) = xx objc_msgSend;
|
|
msg(obj, sel_hello);
|
|
|
|
return g_marker; // 42 if hello_imp ran
|
|
}
|