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).
63 lines
1.9 KiB
Plaintext
63 lines
1.9 KiB
Plaintext
// M1.2 A.1 follow-up — pass-by-value struct args/returns in
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// sx-defined `#objc_class` methods.
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//
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// Wires the new `{Name=field0field1...}` arm of
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// `appendObjcEncoding` into `class_addMethod` registration. Without
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// it, methods that take or return a value-type struct (CGPoint,
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// CGSize, NSRange shapes) used to fail signature-encoding
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// derivation with a "type kind not yet supported" diagnostic.
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//
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// Each sx-defined method registered with the Obj-C runtime needs an
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// encoding string built from its IR signature. For
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// `goto :: (self: *Self, p: Point)` that string is `v@:{Point=dd}`
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// — return void, receiver `@`, selector `:`, then the struct
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// argument `{Point=dd}`.
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//
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// We don't observe the encoding string directly here (it ends up in
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// a private OBJC_METH_VAR_TYPE_ cstring in the linked binary) — but
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// the compiler bails LOUDLY on unsupported types per the project's
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// REJECTED PATTERNS rule, so a successful build is the encoding
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// going through cleanly.
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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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Point :: struct {
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x: f64;
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y: f64;
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}
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SxMover :: #objc_class("SxMover") {
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pos: Point;
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alloc :: () -> *SxMover;
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goto :: (self: *Self, p: Point) {
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self.pos = p;
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}
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here :: (self: *Self) -> Point {
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return self.pos;
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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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m := SxMover.alloc();
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if m == null { print("FAIL: alloc returned null\n"); return 1; }
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m.goto(Point.{ x = 7.5, y = 8.25 });
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p := m.here();
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print("at: ({}, {})\n", p.x, p.y); // expected: at: (7.500000, 8.250000)
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sel_release : SEL = sel_registerName("release".ptr);
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release_fn : (obj: *void, sel: *void) -> void abi(.c) = xx objc_msgSend;
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release_fn(xx m, sel_release);
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}
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inline if OS != .macos {
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print("at: (7.500000, 8.250000)\n");
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}
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0
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}
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