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).
47 lines
1.7 KiB
Plaintext
47 lines
1.7 KiB
Plaintext
// Phase 1 step 1.9 (PLAN-FFI.md): all-double HFA returns through
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// `#objc_call`. 4×f64 = 32 B, stays in v0..v3 on AAPCS64 and
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// xmm0..xmm3 on SysV AMD64 — same shape as UIEdgeInsets / NSRect /
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// CGRect, the f32-vs-f64 landmine that bit us when we first wrote
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// `safeAreaInsets` in uikit.sx.
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//
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// Nominally covered by ffi-objc-call-05's nil-recv NSRect case,
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// but that only checks that zeros come back. Here we install a
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// real IMP that returns specific non-zero values and verify each
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// field comes through the float-register file intact.
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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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UIEdgeInsets :: struct {
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top: f64;
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left: f64;
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bottom: f64;
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right: f64;
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}
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insets_imp :: (self: *void, _cmd: *void) -> UIEdgeInsets abi(.c) {
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UIEdgeInsets.{ top = 1.5, left = 2.5, bottom = 3.5, right = 4.5 }
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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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my_cls := objc_allocateClassPair(ns_object, "SxInsetsProbe".ptr, 0);
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sel := sel_registerName("safeAreaInsets".ptr);
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// Method type encoding: {UIEdgeInsets=dddd}@: → returns 4×f64,
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// implicit (self: id, _cmd: SEL). `d` = double.
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ok := class_addMethod(my_cls, sel, xx insets_imp, "{UIEdgeInsets=dddd}@:".ptr);
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print("addMethod = {}\n", ok);
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objc_registerClassPair(my_cls);
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instance := class_createInstance(my_cls, 0);
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ins := #objc_call(UIEdgeInsets)(instance, "safeAreaInsets");
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print("insets = ({}, {}, {}, {})\n", ins.top, ins.left, ins.bottom, ins.right);
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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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