+
fn main() {
let a = 2;
a = 3;
@@ -104,7 +104,7 @@ fn main() {
+
3 | let a = 2;
| -
| |
@@ -116,7 +116,7 @@ fn main() {
+
fn main() {
let mut a = 2;
a = 3;
@@ -132,25 +132,27 @@ fn main() {
-a = 2
+
+a = String::from("hello");
a
tem o valor 2"
+ "Variável a
tem o valor "hello"
"
a
tem o valor 2"
+ "Posição de memória apontada por a
tem o valor "hello"
"
-0x3f5cbf89 = 2
+0x3f5cbf89 = "hello"
+
fn main() {
let a = String::from("hello");
let _b = a;
@@ -189,13 +191,13 @@ error[E0382]: borrow of moved value: `a`
E se eu precisar acessar a variável em mais de um lugar?
-References
+
+
fn main() {
let a = String::from("hello");
let _b = &a;
@@ -204,6 +206,10 @@ fn main() {
presente := Presente { ... }
+canal <- presente
+ presente := Presente { ... }
+canal <- presente
+presente.abrir()
(structs)
+ enum
+
enum IpAddr {
V4,
V6
@@ -252,7 +268,7 @@ enum IpAddr {
+
enum IpAddr {
V4(String),
V6(String),
@@ -261,18 +277,18 @@ enum IpAddr {
+
let home = IpAddr::V4(String::from("127.0.0.1");
match home {
- V4(address) => println!("IPv4 addr: {}", address),
- V6(address) => println!("Ipv6 addr: {}", address),
+ V4(address) => println!("IPv4 addr: {}", address),
+ V6(address) => println!("Ipv6 addr: {}", address),
}
+
enum Option<T> {
Some(T),
None
@@ -287,7 +303,7 @@ enum Option<T> {
+
try:
something()
except Exception:
@@ -296,7 +312,7 @@ except Exception:
+
try {
something();
} catch (Exception ex) {
@@ -306,7 +322,7 @@ try {
+
FILE* f = fopen("someting.txt", "wb");
fprintf(f, "Done!");
fclose(f);
@@ -320,7 +336,7 @@ fclose(f);
+
enum Result<T, E> {
Ok(T),
Err(E),
@@ -329,36 +345,36 @@ enum Result<T, E> {
+
File::create("something.txt") match {
- Ok(fp) => fp.write_all(b"Hello world"),
- Err(err) => println!("Failure! {}", err),
+ Ok(fp) => fp.write_all(b"Hello world"),
+ Err(err) => println!("Failure! {}", err),
}
+
File::create("something.txt") match {
- Ok(fp) => fp.write_all(b"Hello world") match {
- Ok(_) => (),
- Err(err) => println!("Can't write! {}", err),
+ Ok(fp) => fp.write_all(b"Hello world") match {
+ Ok(_) => (),
+ Err(err) => println!("Can't write! {}", err),
}
- Err(err) => println!("Failure! {}", err),
+ Err(err) => println!("Failure! {}", err),
}
-let mut file = File::create("something.txt).unwrap();
+
+let mut file = File::create("something.txt").unwrap();
file.write(b"Hello world").unwrap();
-let mut file = File::create("something.txt)?;
+
+let mut file = File::create("something.txt")?;
file.write(b"Hello world")?;
OK(())
@@ -379,7 +395,7 @@ OK(())