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).
25 lines
1014 B
Plaintext
25 lines
1014 B
Plaintext
// Comptime compiler API — a layout-welded struct binding.
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//
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// `Field :: struct abi(.zig) extern compiler { … }` binds the sx struct to the
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// compiler's real internal Zig type (`StructInfo.Field`, two u32s) via the
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// `compiler` library. The compiler validates the sx declaration against the
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// welded type's layout at registration time (the sx side is a header checked
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// against the implementation) — a faithful declaration validates clean and the
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// struct is otherwise ordinary data. The `compiler` library is the comptime-only
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// internal surface, so `#library "compiler"` is NOT dlopen'd.
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//
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// Phase 1 (foundation): the weld is layout-validated; field offsets coincide with
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// the natural layout for `Field` (two u32s). Welded host-call functions land in a
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// later phase.
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#import "modules/std.sx";
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compiler :: #library "compiler";
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Field :: struct abi(.zig) extern compiler { name: u32; ty: u32; }
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main :: () {
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f := Field.{ name = 7, ty = 3 };
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print("name={} ty={}\n", f.name, f.ty);
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}
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