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>
34 lines
935 B
Rust
34 lines
935 B
Rust
// 4.3: enum variant edits while a live value holds a variant.
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// v1: a variant is inserted before the held one (discriminants move) and describe() gains its arm:
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// the held value is still C.
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// v2: the held variant C is removed and the enum has no #[default]: refused, the value's home is
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// named, the running code is unchanged.
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use std::cell::RefCell;
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#[derive(Debug)]
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enum Mode {
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A,
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X(u64, u64),
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B(u32),
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}
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thread_local! {
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static HELD: RefCell<Option<Mode>> = RefCell::new(None);
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}
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fn describe(m: &Mode) -> String {
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match m {
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Mode::X(a, b) => format!("X{}", a + b),
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other => format!("{:?}", other),
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}
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}
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#[test]
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fn run() {
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HELD.with(|h| {
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if h.borrow().is_none() {
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*h.borrow_mut() = Some(Mode::A);
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}
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println!("out held {} fresh {} {}", describe(h.borrow().as_ref().unwrap()), describe(&Mode::B(7)), describe(&Mode::X(1, 2)));
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});
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}
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