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Optionally add type names to `TypeId`s. This feature is intended to provide expensive but thorough help for developers who have an unexpected `TypeId` value and need to determine what type it actually is. It causes `impl Debug for TypeId` to print the type name in addition to the opaque ID hash, and in order to do so, adds a name field to `TypeId`. The cost of this is the increased size of `TypeId` and the need to store type names in the binary; therefore, it is an optional feature. It does not expose any new public API, only change the `Debug` implementation. It may be enabled via `cargo -Zbuild-std -Zbuild-std-features=debug_typeid`. (Note that `-Zbuild-std-features` disables default features which you may wish to reenable in addition; see <https://doc.rust-lang.org/cargo/reference/unstable.html#build-std-features>.) Example usage and output: ``` fn main() { use std::any::{Any, TypeId}; dbg!(TypeId::of::<usize>(), drop::<usize>.type_id()); } ``` ``` TypeId::of::<usize>() = TypeId(0x763d199bccd319899208909ed1a860c6 = usize) drop::<usize>.type_id() = TypeId(0xe6a34bd13f8c92dd47806da07b8cca9a = core::mem::drop<usize>) ``` Also added feature declarations for the existing `debug_refcell` feature so it is usable from the `rust.std-features` option of `config.toml`. Related issues: * #68379 * #61533 |
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| async_iter | ||
| ffi | ||
| fmt | ||
| hash | ||
| io | ||
| iter | ||
| net | ||
| num | ||
| ops | ||
| panic | ||
| alloc.rs | ||
| any.rs | ||
| array.rs | ||
| ascii_char.rs | ||
| ascii.rs | ||
| asserting.rs | ||
| atomic.rs | ||
| bool.rs | ||
| bstr.rs | ||
| cell.rs | ||
| char.rs | ||
| clone.rs | ||
| cmp.rs | ||
| const_ptr.rs | ||
| convert.rs | ||
| error.rs | ||
| ffi.rs | ||
| future.rs | ||
| intrinsics.rs | ||
| lazy.rs | ||
| lib.rs | ||
| macros_bootstrap.rs | ||
| macros.rs | ||
| manually_drop.rs | ||
| mem.rs | ||
| nonzero.rs | ||
| ops.rs | ||
| option.rs | ||
| panic.rs | ||
| pattern.rs | ||
| pin_macro.rs | ||
| pin.rs | ||
| ptr.rs | ||
| result.rs | ||
| simd.rs | ||
| slice.rs | ||
| str_lossy.rs | ||
| str.rs | ||
| task.rs | ||
| time.rs | ||
| tuple.rs | ||
| unicode.rs | ||
| waker.rs | ||