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android / platform / external / rust / crates / ptr_meta / cab10406ac0bf318dbe127f268adcce517e8ac83
commitcab10406ac0bf318dbe127f268adcce517e8ac83[log] [tgz]
authorJames Farrell <[email protected]>Tue Dec 03 20:38:28 2024 +0000
committerAutomerger Merge Worker <[email protected]>Tue Dec 03 20:38:28 2024 +0000
treea72f02da0693ae0df2205e775b8e7d715f3ce94c
parentfabd8fb43539cd036fd9001eaa670acabbd3a7a6 [diff]
parent84f95448f7e339b0c93553918647e922869556d5 [diff]
Migrate 9 newly imported crates to monorepo am: 4dc2762c1a am: 84f95448f7

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/ptr_meta/+/3390019

Change-Id: Ib07e812d64a1261d9a491c841d16f382beb518db
Signed-off-by: Automerger Merge Worker <[email protected]>
tree: a72f02da0693ae0df2205e775b8e7d715f3ce94c
  1. src/
  2. Android.bp
  3. Cargo.toml
  4. Cargo.toml.orig
  5. crates-io.md
  6. LICENSE
  7. METADATA
  8. MODULE_LICENSE_MIT
  9. OWNERS
  10. README.md
README.md

ptr_meta   Latest Version License requires: rustc 1.47+

ptr_meta

A radioactive stabilization of the ptr_meta RFC.

Usage

Sized types

Sized types already have Pointee implemented for them, so most of the time you won't have to worry about them. However, trying to derive Pointee for a struct that may or may not have a DST as its last field will cause an implementation conflict with the automatic sized implementation.

slices and strs

These core types have implementations built in.

Structs with a DST as its last field

You can derive Pointee for last-field DSTs:

use ptr_meta::Pointee;

#[derive(Pointee)]
struct Block<H, T> {
    header: H,
    elements: [T],
}

Trait objects

You can generate a Pointee for trait objects:

use ptr_meta::pointee;

// Generates Pointee for dyn Stringy
#[pointee]
trait Stringy {
    fn as_string(&self) -> String;
}