keyword | meaning
--- | ---
as | perform primitive casting, disambiguate the specific trait containing an item, or rename items in use and extern crate statements
async | return a Future instead of blocking the current thread
await | suspend execution until the result of a Future is ready
break | exit a loop immediately
const | define constant items or constant raw pointers
continue | continue to the next loop iteration
crate | link an external crate or a macro variable representing the crate in which the macro is defined
dyn | dynamic dispatch to a trait object
else | fallback for if and if let control flow constructs
enum | define an enumeration
extern | link an external crate, function, or variable
false | Boolean false literal
fn | define a function or the function pointer type
for | loop over items from an iterator, implement a trait, or specify a higher-ranked lifetime
if | branch based on the result of a conditional expression
impl | implement inherent or trait functionality
in | part of for loop syntax
let | bind a variable
loop | loop unconditionally
match | match a value to patterns
mod | define a module
move | make a closure take ownership of all its captures
mut | denote mutability in references, raw pointers, or pattern bindings
pub | denote public visibility in struct fields, impl blocks, or modules
ref | bind by reference
return | return from function
Self | a type alias for the type we are defining or implementing
self | method subject or current module
static | global variable or lifetime lasting the entire program execution
struct | define a structure
super | parent module of the current module
trait | define a trait
true | Boolean true literal
type | define a type alias or associated type
union | define a union and is only a keyword when used in a union declaration
unsafe | denote unsafe code, functions, traits, or implementations
use | bring symbols into scope
where | denote clauses that constrain a type
while | loop conditionally based on the result of an expression