66bdc70bf1
Move examples/*.sx and their expected/ snapshots into per-category subfolders (examples/<category>/...). Folder = leading filename token, with ffi-objc/ffi-jni kept whole; filenames are unchanged. The corpus runner and LSP sweep now discover each category's expected/ dir, while issues/ stays flat. Example 1058's repo-root-relative companion import is made file-relative. Path strings embedded in 164 snapshots were regenerated (path-only changes). Test-layout docs in CLAUDE.md updated.
41 lines
1.6 KiB
Plaintext
41 lines
1.6 KiB
Plaintext
// Error return-trace buffer push/clear wiring (ERR step E3.2). A `raise` and a
|
|
// propagating `try` each push a frame; an absorbing site (`catch`, `or value`,
|
|
// a destructure that binds the error) clears the buffer. In debug builds
|
|
// (`sx run` defaults to -O0) these calls are emitted; in release they're
|
|
// skipped entirely (zero overhead). Until E3.3 ships `trace.print_current`,
|
|
// this example observes the buffer directly via the runtime's `sx_trace_len`
|
|
// (linked in for the JIT) — a white-box probe, not the eventual public API.
|
|
|
|
#import "modules/std.sx";
|
|
|
|
// Internal runtime symbol (library/vendors/sx_trace_runtime/sx_trace.c).
|
|
sx_trace_len :: () -> u32 extern;
|
|
|
|
E :: error { Bad }
|
|
|
|
fail :: (n: i32) -> !E {
|
|
if n < 0 { raise error.Bad; } // pushes a frame
|
|
return;
|
|
}
|
|
|
|
propagate :: (n: i32) -> !E {
|
|
try fail(n); // on failure: pushes a frame, propagates
|
|
return;
|
|
}
|
|
|
|
main :: () -> i32 {
|
|
// `catch` lets the handler INSPECT the trace, then absorbs: the buffer is
|
|
// cleared when the handler completes (a non-diverging exit), not on entry.
|
|
// So inside the handler the frames are still visible (here: the `raise` in
|
|
// `fail` + the `try fail` propagation in `propagate` = 2 frames)...
|
|
propagate(-1) catch (e) {
|
|
print("in catch: len={}\n", sx_trace_len()); // 2 (handler sees the chain)
|
|
};
|
|
print("after catch: len={}\n", sx_trace_len()); // 0 (absorbed at handler exit)
|
|
|
|
// A success leaves the buffer empty (nothing pushed).
|
|
propagate(1) catch (e) { };
|
|
print("after success: len={}\n", sx_trace_len()); // 0
|
|
return 0;
|
|
}
|