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Fix static_mut_ref warning #50

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merged 1 commit into from
Jan 10, 2024
Merged

Fix static_mut_ref warning #50

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10 changes: 3 additions & 7 deletions src/ignore.rs
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Original file line number Diff line number Diff line change
@@ -1,21 +1,17 @@
use crate::de::{Map, Seq, Visitor};
use crate::error::Result;
use alloc::boxed::Box;
use core::ptr;

impl dyn Visitor {
pub fn ignore() -> &'static mut dyn Visitor {
static mut IGNORE: Ignore = Ignore;
unsafe { &mut IGNORE }
//
// The following may be needed if stacked borrows gets more selective
// about the above in the future:
//
// unsafe { &mut *ptr::addr_of_mut!(IGNORE) }
//

// Conceptually we have an array of type [Ignore; ∞] in a static, which
// is zero sized, and each caller of `fn ignore` gets a unique one of
// them, as if by `&mut *ptr::addr_of_mut!(IGNORE[i++])` for some
// appropriately synchronized i.
unsafe { &mut *ptr::addr_of_mut!(IGNORE) }
}
}

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