iSize和uSize有益于索引，因为iSize是指针大小的有符号整数类型，而uSize是指针大小的无符号整数类型。记...
// Rust program to demonstrate // isize and usize datatypes. fn main() { // The pointer-sized signed integer type let mut var1:isize=-10; // The pointer-sized unsigned integer type let mut var2:usize=30; println!("Var1: {}",var1); println!("Var2: {}",var2); } ...
OTOH if we fix the maximum allowed value size toisize::MAX, then there is a subset of C types (those with a larger size) that we can't interface with via C FFI. This might be a trade-off worth making, e.g., if choosingisize::MAXsimplifies Rust unsafe code, or if theusize::M...
Currently bindgen has special logic to recognise `size_t` and `ssize_t` and map them to Rust `usize` and `isize`. Similarly, `ptrdiff_t` is mapped to `isize`. However this falls short for `__kernel_size_t`, `__kernel_ssize_t` and `__kernel_ptrdiff_t`. To ensure that they ...
cur_index: Option<usize>, } impl Iterator for DmaBuffIter { type Item = &'static [u16; 4]; fn next(&mut self) -> Option<Self::Item> { match &mut self.cur_index { Some(i) => { *i += 1; } None => { self.cur_index = Some(0); ...
regardless of platform) is the more popular one, and more forward-compatible. I would rather see the performance issue dealt with through potential future compiler optimisation. May 9, 2018 Prior to#49305the error types forTryFromconversions involvingusizeisizedepended on the platform. Given that ...
The long-awaited finale to the saga of exhaustiveness checking for integers! match 0usize { 0.. => {} // exhaustive! } match 0usize { 0..usize::MAX => {} // helpful error message! } Feature...
fn extend_with<E: ExtendWith<T>>(&mut self, n: usize, mut value: E) { @@ -1949,7 +1960,7 @@ impl Drop for SetLenOnDrop<'_> { }impl<T: PartialEq> Vec<T> { /// [`PartialEq`]トレイトの実装によって連続して繰り返される要素を取り除きます。