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).
27 lines
751 B
Plaintext
27 lines
751 B
Plaintext
// PLAN-HTTPZ C2: an sx `abi(.c)` function passes by name as a
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// typed C function pointer — libc qsort drives an sx comparator.
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#import "modules/std.sx";
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clib :: #library "c";
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qsort :: (base: [*]u8, nel: usize, width: usize, compar: (*void, *void) -> i32 abi(.c)) extern clib;
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cmp_i32 :: (a: *void, b: *void) -> i32 abi(.c) {
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pa : *i32 = xx a;
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pb : *i32 = xx b;
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if pa.* < pb.* { return -1; }
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if pa.* > pb.* { return 1; }
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return 0;
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}
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main :: () -> i32 {
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arr : [5]i32 = .[ 4, 1, 5, 2, 3 ];
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qsort(xx @arr[0], 5, 4, cmp_i32);
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i := 0;
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while i < 5 {
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if arr[i] != cast(i32)(i + 1) { print("not sorted at {}\n", i); return 1; }
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i += 1;
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}
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print("qsort via sx comparator ok\n");
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return 0;
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}
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