thereadme/theread.me
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

remove confusing exclamation mark

Browse Source
This commit is contained in:
Mahdi Dibaiee 2022-06-28 15:47:13 +01:00
parent 7eb278a0c6
commit 50f4eb10cf
1 changed files with 5 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
_posts/2022-06-16-rust-boxed-str-vs-string.md
View File

@ -143,7 +143,7 @@ Turns out, `String` and `Vec` cover two of the most common cases where we may wa
```rust ```rust
fn main() { fn main() {
let s = String::from("hello!"); let s = String::from("hello");
println!("{}", s); println!("{}", s);
} }
``` ```
@ -159,19 +159,18 @@ Process 68317 stopped
* thread #1, queue = 'com.apple.main-thread', stop reason = breakpoint 1.1 * thread #1, queue = 'com.apple.main-thread', stop reason = breakpoint 1.1
frame #0: 0x000000010000476c string-program`string_program::main::h64ca96ee87b0ceaf at main.rs:3:5 frame #0: 0x000000010000476c string-program`string_program::main::h64ca96ee87b0ceaf at main.rs:3:5
1 fn main() { 1 fn main() {
2 let s = String::from("hello!"); 2 let s = String::from("hello");
-> 3 println!("{}", s); -> 3 println!("{}", s);
4 } 4 }
(lldb) frame var -L -T (lldb) frame var -L -T
0x000000016fdfed78: (alloc::string::String) s = "hello!" { 0x000000016fdfed78: (alloc::string::String) s = "hello" {
0x000000016fdfed78: (alloc::vec::Vec<unsigned char, alloc::alloc::Global>) vec = size=6 { 0x000000016fdfed78: (alloc::vec::Vec<unsigned char, alloc::alloc::Global>) vec = size=5 {
0x0000600000004010: (unsigned char) [0] = 'h' 0x0000600000004010: (unsigned char) [0] = 'h'
0x0000600000004011: (unsigned char) [1] = 'e' 0x0000600000004011: (unsigned char) [1] = 'e'
0x0000600000004012: (unsigned char) [2] = 'l' 0x0000600000004012: (unsigned char) [2] = 'l'
0x0000600000004013: (unsigned char) [3] = 'l' 0x0000600000004013: (unsigned char) [3] = 'l'
0x0000600000004014: (unsigned char) [4] = 'o' 0x0000600000004014: (unsigned char) [4] = 'o'
0x0000600000004015: (unsigned char) [5] = '!'
} }
} }
``` ```
@ -238,7 +237,7 @@ Okay, so a `Box<str>` is much simpler than a `String`: there is no `Vec`, and no
let boxed_str: Box<str> = "hello".into(); let boxed_str: Box<str> = "hello".into();
println!("size of boxed_str on stack: {}", std::mem::size_of_val(&boxed_str)); println!("size of boxed_str on stack: {}", std::mem::size_of_val(&boxed_str));
let s = String::from("hello!"); let s = String::from("hello");
println!("size of string on stack: {}", std::mem::size_of_val(&s)); println!("size of string on stack: {}", std::mem::size_of_val(&s));
``` ```