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...rust-lang/rust#51994
Summary
Tuple structs can now be constructed and pattern matched with
Self(v1, v2, ..). A simple example:
struct TheAnswer(usize);
impl Default for TheAnswer {
fn default() -> Self { Self(42) }
}
Similarly, unit structs can also be constructed and pattern matched with Self.
Motivation
This RFC proposes a...
...In order for the filter to match, it is enough that one rule associated to the system call matches. A system call may also map to an empty rule vector, which means that the system call will match, regardless of the actual arguments. The following diagram models a simple filter...
std::ascii::AsciiExt::eq_ignore_ascii_case
Deprecated
fn eq_ignore_ascii_case(&self, other: &Self) -> boolAsciiExt::eq_ignore_ascii_case — Checks that two values are an ASCII case-insensitive match.
Same as to_ascii_lowercase(a) == to_ascii_lowercase(b), but without allocating and copying temporaries.
Note
This method is deprecated in favor of the identically-named inherent methods on u8, char, [u8] and str.
pub fn shrink_to_fit(&mut self)OsString::shrink_to_fit — Shrinks the capacity of the OsString to match its length.
See the main OsString documentation information about encoding and capacity units.
Examples
use std::ffi::OsString;
let mut s = OsString::from("foo");
s.reserve(100);
assert!(s.capacity() >= 100);
s.shrink_to_fit();
assert_eq!(3...
...Examples From a file match imagesize::size("example.webp") { Ok(size) => println!("Image dimensions: {}x{}", size.width, size.height), Err(why) => println!("Error getting dimensions: {:?}", why) } From a vector let data = vec![0x47, 0x49, 0x46, 0x38, 0x39, 0x61, 0x64, 0x00, 0x64, 0x00]; match imagesize::blob_size(&data) { Ok(size) => println...
...BytesMut = "*2\r\n+Foo\r\n+Bar\r\n".into(); let total_len = bytes.len(); let (frame, amt, buf) = match decode_bytes_mut(&mut bytes) { Ok(Some(result)) => result, Ok(None) => panic!("Expected complete frame"), Err(e) => panic!("{:?}", e) }; assert_eq!(frame, expected.0, "decoded frame matched"); assert_eq...
...layer.
#10689 handle pub tuple fields in tuple structs.
#10720 don’t ascribe types in pattern completion for param patterns twice.
#10747 remove faulty logic for ascending test attributes for runnables.
#10762 trigger flyimport on enum variants.
#10759 make add_missing_match_arms applicable at the end of the match.
pub struct SplitMut<'a, T, P>SplitMut — An iterator over the mutable subslices of the vector which are separated by elements that match pred.
This struct is created by the split_mut method on slices.
Example
let mut v = [10, 40, 30, 20, 60, 50];
let iter = v.split_mut(|num| *num % 3 == 0);
core::try
Deprecated
pub macro try!...fn write_to_file_using_match() -> Result<(), MyError> {
let mut file = r#try!(File::create("my_best_friends.txt"));
match file.write_all(b"This is a list of my best friends.") {
Ok(v) => v,
Err(e) => return Err(From::from(e)),
}
Ok(())
}
...Packet
) {
match packet {
Packet::Pingreq => {
println!("Ping");
framed.send(Packet::Pingresp).await;
}
_ => {
// now what?
}
}
}
pub async fn handle_client(
stream: TcpStream,
addr: SocketAddr
) {
let mut framed = Framed::new(stream, MQTTCodec::new());
// do connection handshake
let connect = match framed.next().await {
Some(Ok(Packet::Connect(packet))) => {
framed.send(Packet::Connack( Connack...
...It’s built using our engine, Wirefilter, which takes powerful boolean expressions written by customers and matches incoming requests against them. Customers can then choose how to respond to traffic which matches these rules. We will discuss some in-depth optimizations we have recently made to Wirefilter, so you may...
...fn main() {
let matches = command!()
.arg(arg!(--function <VALUE>).required(true))
.get_matches();
let function = matches.get_one::<String>("function").expect("required");
loop {
let mut input = String::new();
match io::stdin().read_line(&mut input) {
Ok(n) => {
if n == 0 {
// End files
break;
}
let mut result = match function.as_str...
...Within $() is $x:expr, which matches any Rust expression and gives the expression the name $x.
The comma following $() indicates that a literal comma separator character must appear between each instance of the code that matches the code in $(). The * specifies that the pattern matches zero or more of whatever...
## Summary
[summary]: #summary
Tuple `struct`s can now be constructed and pattern matched with
`Self(v1, v2, ..)`. A simple example:
```rust
struct TheAnswer(usize);
impl Default for TheAnswer {
fn default() -> Self { Self(42) }
}
```
Similarly, unit structs can also be constructed and pattern matched with `Self`.
## Motivation
[motivation]: #motivation
This RFC...
...messageBytes, message_type } = received;
assert.strictEqual(sender, alice_identifier, "Sender does not match Alice's identifier");
let receivedMessage = String.fromCharCode.apply(null, messageBytes);
assert.strictEqual(receivedMessage, message, "Received message does not match");
assert.strictEqual(message_type, MessageType.SignedAndEncrypted, "Message type does not match SignedAndEncrypted");
} else {
assert.fail(`Unexpected message type...
pub struct Split<'a, T, P>Split — An iterator over subslices separated by elements that match a predicate function.
This struct is created by the split method on slices.
Example
let slice = [10, 40, 33, 20];
let mut iter = slice.split(|num| num % 3 == 0);
assert_eq!(iter.next(), Some(&[10, 40][..]));
assert_eq!(iter.next...
...since the TypeScript document has tokens matching both terms, we will consider it a match for this query.
We can let the user specify that they want a more “exact” match, for example by using "javascript language", meaning that the term language must follow the term javascript.Our index currently...
...u32) -> Option<Error> {
let res = match code {
0 => Error::InvalidSignature,
1 => Error::AccountNotFound,
2 => Error::InsufficientBalance,
_ => return None,
};
Some(res)
}
}
Now, given that I expect this type to change frequently, this is
asking for trouble! It’s very easy for the match and
the enum definition to get out of...
pub fn split<P>(&self, pat: P) -> Split<'_, P>str::split — Returns an iterator over substrings of this string slice, separated by characters matched by a pattern.
The pattern can be a &str, char, a slice of chars, or a function or closure that determines if a character matches.
If there are no matches the full string slice is...
pub struct SplitNMut<'a, T, P>SplitNMut — An iterator over subslices separated by elements that match a predicate function, limited to a given number of splits.
This struct is created by the splitn_mut method on slices.
Example
let mut slice = [10, 40, 30, 20, 60, 50];
let iter = slice.splitn_mut(2, |num| *num % 3...
""Ah but logic errors can happen with all languages" yes and I'm sure trains occasionally run into trees as well, but cars are way more likely to. 🙃"