Brummel
e1c908912b
`(ret (borrow T))` is now a check error (CheckError::BorrowReturnNotPermitted, code `borrow-return-not-permitted`), fired on the fn signature before body dataflow. Borrow-returns are refcount-invisible and can outlive their source; re-enabling them needs the escape/liveness axis, which is out of scope (spec 0062). The diagnostic names that gap as an honest "not yet". The check_fn signature destructure now also binds `ret_mode` (param_modes stays under `..`; the borrow-over-value reject that reads it is folded into the cutover, task 4). RED-first: examples/borrow_return_reject.ail checked clean (exit 0) before the reject landed, exits 1 after. New CLI-boundary E2E pin crates/ail/tests/mode_signature_rejects.rs, modelled on raw_buf_new_type_arg_pin.rs. Additive — ParamMode::Implicit still present; full workspace suite green, bench/check.py 0 regressed. refs #55
28 lines
1.1 KiB
Rust
28 lines
1.1 KiB
Rust
//! Signature-level mode rejects added by spec 0062: borrow-return
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//! (`(ret (borrow T))`) and borrow-over-value (`(borrow value-type)`).
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//! CLI-boundary E2E (the project's reject-pin pattern): the diagnostic
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//! is the observable exit behaviour of `ail check`.
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use std::path::{Path, PathBuf};
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use std::process::Command;
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fn repo_root() -> PathBuf {
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Path::new(env!("CARGO_MANIFEST_DIR")).parent().unwrap().parent().unwrap().to_path_buf()
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}
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fn check_rejects_with(fixture: &str, code: &str) {
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let path = repo_root().join("examples").join(fixture);
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let out = Command::new(env!("CARGO_BIN_EXE_ail"))
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.arg("check").arg(&path).output().expect("ail check spawn");
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assert!(!out.status.success(),
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"expected `ail check {fixture}` to REJECT, but it passed: stdout={}",
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String::from_utf8_lossy(&out.stdout));
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let stderr = String::from_utf8_lossy(&out.stderr);
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assert!(stderr.contains(code), "expected code `{code}`, got: {stderr}");
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}
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/// `(ret (borrow T))` is rejected with code `borrow-return-not-permitted`.
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#[test]
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fn borrow_return_is_rejected() {
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check_rejects_with("borrow_return_reject.ail", "borrow-return-not-permitted");
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}
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