v1 - core

Enums

Option The Option type. See the module level documentation for more.
Result Result is a type that represents either success (Ok) or failure (Err).

Traits

AsMut Used to do a cheap mutable-to-mutable reference conversion.
AsRef Used to do a cheap reference-to-reference conversion.
AsyncFn An async-aware version of the Fn trait.
AsyncFnMut An async-aware version of the FnMut trait.
AsyncFnOnce An async-aware version of the FnOnce trait.
Clone A common trait that allows explicit creation of a duplicate value.
Copy Types whose values can be duplicated simply by copying bits.
Default A trait for giving a type a useful default value.
DoubleEndedIterator An iterator able to yield elements from both ends.
Drop Custom code within the destructor.
Eq Trait for comparisons corresponding to equivalence relations.
ExactSizeIterator An iterator that knows its exact length.
Extend Extend a collection with the contents of an iterator.
Fn The version of the call operator that takes an immutable receiver.
FnMut The version of the call operator that takes a mutable receiver.
FnOnce The version of the call operator that takes a by-value receiver.
From Used to do value-to-value conversions while consuming the input value. It is the reciprocal of Into.
Into A value-to-value conversion that consumes the input value. The opposite of From.
IntoIterator Conversion into an Iterator.
Iterator A trait for dealing with iterators.
Ord Trait for types that form a total order.
PartialEq Trait for comparisons using the equality operator.
PartialOrd Trait for types that form a partial order.
Send Types that can be transferred across thread boundaries.
Sized Types with a constant size known at compile time.
Sync Types for which it is safe to share references between threads.
Unpin Types that do not require any pinning guarantees.

Functions

align_of Returns the [ABI]-required minimum alignment of a type in bytes.
align_of_val Returns the [ABI]-required minimum alignment of the type of the value that val points to in bytes.
drop Disposes of a value.
size_of Returns the size of a type in bytes.
size_of_val Returns the size of the pointed-to value in bytes.

Macros

Clone Derive macro generating an impl of the trait Clone.
Copy Derive macro generating an impl of the trait Copy.
Debug Derive macro generating an impl of the trait Debug.
Default Derive macro generating an impl of the trait Default.
Eq Derive macro generating an impl of the trait Eq.
Hash Derive macro generating an impl of the trait Hash.
Ord Derive macro generating an impl of the trait Ord. The behavior of this macro is described in detail here.
PartialEq Derive macro generating an impl of the trait PartialEq. The behavior of this macro is described in detail here.
PartialOrd Derive macro generating an impl of the trait PartialOrd. The behavior of this macro is described in detail here.
alloc_error_handler Attribute macro applied to a function to register it as a handler for allocation failure.
assert Asserts that a boolean expression is true at runtime.
assert_eq Asserts that two expressions are equal to each other (using PartialEq).
assert_ne Asserts that two expressions are not equal to each other (using PartialEq).
bench Attribute macro applied to a function to turn it into a benchmark test.
cfg Evaluates boolean combinations of configuration flags at compile-time.
cfg_accessible Keeps the item it's applied to if the passed path is accessible, and removes it otherwise.
cfg_eval Expands all #[cfg] and #[cfg_attr] attributes in the code fragment it's applied to.
cfg_select Selects code at compile-time based on cfg predicates.
column Expands to the column number at which it was invoked.
compile_error Causes compilation to fail with the given error message when encountered.
concat Concatenates literals into a static string slice.
concat_bytes Concatenates literals into a byte slice.
const_format_args Same as format_args, but can be used in some const contexts.
debug_assert Asserts that a boolean expression is true at runtime.
debug_assert_eq Asserts that two expressions are equal to each other.
debug_assert_ne Asserts that two expressions are not equal to each other.
define_opaque Provide a list of type aliases and other opaque-type-containing type definitions to an item with a body. This list will be used in that body to define opaque types' hidden types. Can only be applied to things that have bodies.
deref Unstable placeholder for deref patterns.
derive Attribute macro used to apply derive macros.
derive_const Attribute macro used to apply derive macros for implementing traits in a const context.
eii Externally Implementable Item: Defines an attribute macro that can override the item this is applied to.
eii_declaration Impl detail of EII
env Inspects an environment variable at compile time.
file Expands to the file name in which it was invoked.
format_args Constructs parameters for the other string-formatting macros.
global_allocator Attribute macro applied to a static to register it as a global allocator.
include Parses a file as an expression or an item according to the context.
include_bytes Includes a file as a reference to a byte array.
include_str Includes a UTF-8 encoded file as a string.
line Expands to the line number on which it was invoked.
log_syntax Prints passed tokens into the standard output.
matches Returns whether the given expression matches the provided pattern.
module_path Expands to a string that represents the current module path.
option_env Optionally inspects an environment variable at compile time.
panic Panics the current thread.

pattern_type

Creates a pattern type.

type Positive = std::pat::pattern_type!(i32 is 1..);

stringify Stringifies its arguments.
test Attribute macro applied to a function to turn it into a unit test.
test_case An implementation detail of the #[test] and #[bench] macros.
todo Indicates unfinished code.
trace_macros Enables or disables tracing functionality used for debugging other macros.
try Unwraps a result or propagates its error.
type_ascribe Unstable placeholder for type ascription.
unimplemented Indicates unimplemented code by panicking with a message of "not implemented".
unreachable Indicates unreachable code.
unsafe_eii Unsafely Externally Implementable Item: Defines an unsafe attribute macro that can override the item this is applied to.
write Writes formatted data into a buffer.
writeln Writes formatted data into a buffer, with a newline appended.