959845bd30
The canonical sx block-body lambda is `(params) { stmts }` (and
`(params) -> Ret { stmts }`); the arrow form `=>` is for EXPRESSION bodies
(`(params) => expr`). The arrow-block hybrid `(params) => { .. }` was being
used in 33 files — convert all of them by dropping the `=>`. The two forms are
exactly equivalent (verified: identical IR and identical runtime values — the
block tail is the value with or without a `-> Ret`), so this is a pure source
cleanup: no `.ir` churn, and the only snapshot change is 0923's diagnostic
COLUMN (a negative narrowing test whose error span shifted by the removed `=> `).
Arrow EXPRESSION bodies (`=> expr`, `=> .{..}`, `=> [..]`) and `=>` inside
comments/strings were left untouched. Migrated across examples/concurrency,
examples/{closures,ffi-objc,generics,optionals,types}, issues/, and the stdlib
(io.sx, sched.sx). Suite 855/0.
29 lines
1.0 KiB
Plaintext
29 lines
1.0 KiB
Plaintext
// Generic `Into(Block)` impl with a `string`-typed arg in the
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// closure signature. The block trampoline declares the param with
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// abi(.c); without the abi-collapse fix, sx `string` got
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// silently collapsed to `ptr` (the libc `char *` heuristic) and
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// the caller's 16-byte `{ptr, len}` value mismatched the
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// trampoline's 8-byte `ptr` slot. Result: segfault inside the
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// trampoline's first read.
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//
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// The fix lives in `abiCoerceParamTypeEx`: the `string`/`slice` →
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// `ptr` collapse only applies to `is_extern` extern decls (libc
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// interop). sx-internal `abi(.c)` keeps the full slice
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// shape, which lands as `[2 x i64]` at the LLVM signature site
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// and matches the caller's two-register pass on AArch64.
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#import "modules/std.sx";
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#import "modules/ffi/objc_block.sx";
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g_s: string = "";
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main :: () -> i32 {
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cl := (s: string) { g_s = s; };
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b : Block = xx cl;
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invoke_fn : (*Block, string) -> void abi(.c) = xx b.invoke;
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invoke_fn(@b, "hello");
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if g_s.len == 0 { print("FAIL: empty\n"); return 1; }
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print("got: <{}>\n", g_s);
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0
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}
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