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Stephen Chung
2020-11-20 16:52:28 +08:00
parent 2afcecc6ba
commit 783803ec46
40 changed files with 698 additions and 644 deletions
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8
src/unsafe.rs
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@@ -44,11 +44,11 @@ pub fn unsafe_cast_box<X: Variant, T: Variant>(item: Box<X>) -> Result<Box<T>, B
///
/// A dangerous function that blindly casts a `&str` from one lifetime to a `&str` of
/// another lifetime. This is mainly used to let us push a block-local variable into the
/// current `Scope` without cloning the variable name. Doing this is safe because all local
/// variables in the `Scope` are cleared out before existing the block.
/// current [`Scope`][crate::Scope] without cloning the variable name. Doing this is safe because all local
/// variables in the [`Scope`][crate::Scope] are cleared out before existing the block.
///
/// Force-casting a local variable's lifetime to the current `Scope`'s larger lifetime saves
/// on allocations and string cloning, thus avoids us having to maintain a chain of `Scope`'s.
/// Force-casting a local variable's lifetime to the current [`Scope`][crate::Scope]'s larger lifetime saves
/// on allocations and string cloning, thus avoids us having to maintain a chain of [`Scope`][crate::Scope]'s.
#[inline]
pub fn unsafe_cast_var_name_to_lifetime<'s>(name: &str) -> &'s str {
// WARNING - force-cast the variable name into the scope's lifetime to avoid cloning it