Module marker
Primitive traits and types representing basic properties of types.
Rust types can be classified in various useful ways according to their intrinsic properties. These classifications are represented as traits.
Structs
-
PhantomData
Zero-sized type used to mark things that "act like" they own a
T. -
PhantomPinned
A marker type which does not implement
Unpin.
Traits
-
ConstParamTy_
A marker for types which can be used as types of
constgeneric parameters. - Copy Types whose values can be duplicated simply by copying bits.
- Destruct A marker for types that can be dropped.
- DiscriminantKind Compiler-internal trait used to indicate the type of enum discriminants.
- FnPtr A common trait implemented by all function pointers.
-
Freeze
Used to determine whether a type contains
any
UnsafeCellinternally, but not through an indirection. This affects, for example, whether astaticof that type is placed in read-only static memory or writable static memory. This can be used to declare that a constant with a generic type will not contain interior mutability, and subsequently allow placing the constant behind references. - MetaSized Types with a size that can be determined from pointer metadata.
- PointeeSized Types that may or may not have a size.
- Send Types that can be transferred across thread boundaries.
- Sized Types with a constant size known at compile time.
- StructuralPartialEq Required trait for constants used in pattern matches.
- Sync Types for which it is safe to share references between threads.
- Tuple A marker for tuple types.
- Unpin Types that do not require any pinning guarantees.
- Unsize Types that can be "unsized" to a dynamically-sized type.