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-# memoffset #
-
-[![](https://img.shields.io/crates/v/memoffset.svg)](https://crates.io/crates/memoffset)
-
-C-Like `offset_of` functionality for Rust structs.
-
-Introduces the following macros:
- * `offset_of!` for obtaining the offset of a member of a struct.
- * `offset_of_tuple!` for obtaining the offset of a member of a tuple. (Requires Rust 1.20+)
- * `offset_of_union!` for obtaining the offset of a member of a union.
- * `span_of!` for obtaining the range that a field, or fields, span.
-
-`memoffset` works under `no_std` environments.
-
-## Usage ##
-Add the following dependency to your `Cargo.toml`:
-
-```toml
-[dependencies]
-memoffset = "0.8"
-```
-
-These versions will compile fine with rustc versions greater or equal to 1.19.
-
-## Examples ##
-```rust
-use memoffset::{offset_of, span_of};
-
-#[repr(C, packed)]
-struct Foo {
-    a: u32,
-    b: u32,
-    c: [u8; 5],
-    d: u32,
-}
-
-fn main() {
-    assert_eq!(offset_of!(Foo, b), 4);
-    assert_eq!(offset_of!(Foo, d), 4+4+5);
-
-    assert_eq!(span_of!(Foo, a),        0..4);
-    assert_eq!(span_of!(Foo, a ..  c),  0..8);
-    assert_eq!(span_of!(Foo, a ..= c),  0..13);
-    assert_eq!(span_of!(Foo, ..= d),    0..17);
-    assert_eq!(span_of!(Foo, b ..),     4..17);
-}
-```
-
-## Usage in constants ##
-`memoffset` has support for compile-time `offset_of!` on rust>=1.65, or on older nightly compilers.
-
-### Usage on stable Rust ###
-Constant evaluation is automatically enabled and avilable on stable compilers starting with rustc 1.65.
-
-This is an incomplete implementation with one caveat:
-Due to dependence on [`#![feature(const_refs_to_cell)]`](https://github.com/rust-lang/rust/issues/80384), you cannot get the offset of a `Cell` field in a const-context.
-
-This means that if need to get the offset of a cell, you'll have to remain on nightly for now.
-
-### Usage on recent nightlies ###
-
-If you're using a new-enough nightly and you require the ability to get the offset of a `Cell`,
-you'll have to enable the `unstable_const` cargo feature, as well as enabling `const_refs_to_cell` in your crate root.
-
-Do note that `unstable_const` is an unstable feature that is set to be removed in a future version of `memoffset`.
-
-Cargo.toml:
-```toml
-[dependencies.memoffset]
-version = "0.8"
-features = ["unstable_const"]
-```
-
-Your crate root: (`lib.rs`/`main.rs`)
-```rust,ignore
-#![feature(const_refs_to_cell)]
-```
-
-### Usage on older nightlies ###
-In order to use it on an older nightly compiler, you must enable the `unstable_const` crate feature and several compiler features.
-
-Your crate root: (`lib.rs`/`main.rs`)
-```rust,ignore
-#![feature(const_ptr_offset_from, const_refs_to_cell)]
-```