Make always-assert crate reusable

crates/stdx/src/macros.rs

@@ -1,9 +1,5 @@
 //! Convenience macros.
 
-use std::{
-    fmt, mem, panic,
-    sync::atomic::{AtomicUsize, Ordering::SeqCst},
-};
 #[macro_export]
 macro_rules! eprintln {
     ($($tt:tt)*) => {{
@@ -49,50 +45,3 @@ macro_rules! impl_from {
         )*
     }
 }
-
-/// A version of `assert!` macro which allows to handle an assertion failure.
-///
-/// In release mode, it returns the condition and logs an error.
-///
-/// ```
-/// if assert_never!(impossible) {
-///     // Heh, this shouldn't have happened, but lets try to soldier on...
-///     return None;
-/// }
-/// ```
-///
-/// Rust analyzer is a long-running process, and crashing really isn't an option.
-///
-/// Shamelessly stolen from: https://www.sqlite.org/assert.html
-#[macro_export]
-macro_rules! assert_never {
-    ($cond:expr) => { $crate::assert_never!($cond, "") };
-    ($cond:expr, $($fmt:tt)*) => {{
-        let value = $cond;
-        if value {
-            $crate::on_assert_failure(
-                format_args!($($fmt)*)
-            );
-        }
-        value
-    }};
-}
-
-type AssertHook = fn(&panic::Location<'_>, fmt::Arguments<'_>);
-static HOOK: AtomicUsize = AtomicUsize::new(0);
-
-pub fn set_assert_hook(hook: AssertHook) {
-    HOOK.store(hook as usize, SeqCst);
-}
-
-#[cold]
-#[track_caller]
-pub fn on_assert_failure(args: fmt::Arguments) {
-    let hook: usize = HOOK.load(SeqCst);
-    if hook == 0 {
-        panic!("\n  assertion failed: {}\n", args);
-    }
-
-    let hook: AssertHook = unsafe { mem::transmute::<usize, AssertHook>(hook) };
-    hook(panic::Location::caller(), args)
-}