[−][src]Function alloc_counter::deny_alloc
pub fn deny_alloc<F, R>(f: F) -> R where
F: FnOnce() -> R,
Panic on any allocations during the provided closure. If code within the closure
calls allow_alloc
, allocations are allowed within that scope.
Examples:
// panics due to `Box` forcing a heap allocation deny_alloc(|| Box::new(0));
fn foo(b: Box<i32>) { // safe since the drop happens in an `allow` closure deny_alloc(|| allow_alloc(|| drop(b))); } foo(Box::new(0));