b22a714840
The JIT that runs makepad apps from source: lexer, front end, type checker, lazy borrow checker (Gandalf; `--check-first` opts in), codegen, session and warm/cold caches keyed by compiler stamp, provided crates bound late, startup images, live patching. User-facing name is `makepad run` (binary `makepad`, MAKEPAD_RUN_* env, ~/.makepad-run); libs/relax stays the internal library name. `makepad check` reports rustc-style diagnostics with rustc error codes and checks a whole workspace (`--workspace`). Runs on macOS, Linux, Windows and Android. makepad-remote: one tool schema for apps and the WM (app/1): grabs, captures, traces, frame profiles and tweaks. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
46 lines
1.9 KiB
Rust
46 lines
1.9 KiB
Rust
// rustc_hir_typeck/src/callee.rs:610-615: each call instantiates the binder.
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fn call<F: for<'a> Fn(&'a u32) -> &'a u32>(f: F, x: &u32) -> u32 { *f(x) }
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fn identity(x: &u32) -> &u32 { x }
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#[test]
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fn higher_ranked_parameter_call() { assert_eq!(call(identity, &9), 9); }
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#[test]
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fn function_item_iterator_projection() {
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let names = vec![String::from("a"), String::from("b")];
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let parts = names.iter().map(String::as_str).collect::<Vec<_>>();
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assert_eq!(parts, vec!["a", "b"]);
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}
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#[test]
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fn nested_iterator_callable_regions() {
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let rows = vec![Some(String::from("a")), None, Some(String::from("b"))];
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let parts = rows.iter().filter_map(|row| row.as_deref()).collect::<Vec<_>>();
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assert_eq!(parts, vec!["a", "b"]);
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}
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enum Selection<'a> { Value(&'a str) }
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impl<'a> From<&'a str> for Selection<'a> { fn from(x: &'a str) -> Self { Self::Value(x) } }
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fn choose<'a>(input: impl Into<Selection<'a>>) -> usize {
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match input.into() { Selection::Value(x) => x.len() }
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}
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#[test]
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fn apit_lifetime_is_early_bound() { assert_eq!(choose("abc"), 3); }
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struct Holder<'a>(&'a str);
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impl Holder<'_> { fn mapped(&self) -> usize { [1u32, 2].iter().map(|v| *v as usize + self.0.len()).sum() } }
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#[test]
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fn closure_owner_keeps_anonymous_impl_lifetime() { assert_eq!(Holder("a").mapped(), 5); }
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trait Requests { type Request<'a>; fn len(req: Self::Request<'_>) -> usize; }
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struct Client;
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impl Requests for Client { type Request<'a> = &'a str; fn len(req: Self::Request<'_>) -> usize { req.len() } }
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#[test]
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fn self_gat_keeps_own_lifetime() { assert_eq!(Client::len("abcd"), 4); }
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#[test]
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fn higher_ranked_object_coercion() {
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let f: &dyn for<'a> Fn(&'a u32) -> &'a u32 = &identity;
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assert_eq!(*f(&17), 17);
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}
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#[test]
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fn higher_ranked_fn_pointer_builtin_marker() {
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fn identity(s: &str) -> &str { s }
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fn is_ptr<T: core::ops::FnPtr>(_: T) {}
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let f: for<'a> fn(&'a str) -> &'a str = identity;
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is_ptr(f);
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}
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