Ensure that the noalias optimization takes effect by expanding to closure call.
This library only contains one macro definition: ```rust
pub fn with
macro_rules! with { ($($a:pat = $va:expr,)* $f:block) => { $crate::with(($($va,)), |($($a,))| $f) }; } ```
Due to compiler limitations, some code cannot achieve complete alias optimization.
rust
pub fn foo(mut x: Vec<i32>) {
x[0] = 1;
println!("do something");
if x[0] != 1 {
println!("branch");
}
}
The compiler cannot delete the branch.
After passing a function, the compiler learned about this.
rust
pub fn foo(mut x: Vec<i32>) {
with!(x = x.as_mut_slice(), {
x[0] = 1;
println!("do something");
if x[0] != 1 {
println!("branch");
}
});
}
Branch deleted.