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Edited the advance.md

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Tanish-Eagle 2022-10-29 15:40:38 +05:30
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en/src/lifetime/advance.md
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@ -1,4 +1,4 @@
# advanced lifetime # Advance lifetime
## Trait Bounds ## Trait Bounds
Just like generic types can be bounded, lifetimes can also be bounded as below: Just like generic types can be bounded, lifetimes can also be bounded as below:
@ -39,10 +39,10 @@ fn main() {
} }
``` ```
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```rust,editable ```rust,editable
/* Annotate struct with lifetime: /* Annotate struct with lifetime:
1. `r` and `s` must has different lifetimes 1. `r` and `s` must have different lifetimes
2. lifetime of `s` is bigger than that of 'r' 2. lifetime of `s` is bigger than that of 'r'
*/ */
struct DoubleRef<T> { struct DoubleRef<T> {
@ -55,7 +55,7 @@ fn main() {
``` ```
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```rust,editable ```rust,editable
/* Adding trait bounds to make it work */ /* Adding trait bounds to make it work */
struct ImportantExcerpt<'a> { struct ImportantExcerpt<'a> {
@ -74,7 +74,7 @@ fn main() {
} }
``` ```
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```rust,editable ```rust,editable
/* Adding trait bounds to make it work */ /* Adding trait bounds to make it work */
fn f<'a, 'b>(x: &'a i32, mut y: &'b i32) { fn f<'a, 'b>(x: &'a i32, mut y: &'b i32) {
@ -98,9 +98,9 @@ impl<'a> PartialEq<i32> for &'a T {
and could then be used to compare a `&'a T` with any lifetime to an `i32`. and could then be used to compare a `&'a T` with any lifetime to an `i32`.
Only a higher-ranked bound can be used here, because the lifetime of the reference is shorter than any possible lifetime parameter on the function。 Only a higher-ranked bound can be used here, because the lifetime of the reference is shorter than any possible lifetime parameter on the function.
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```rust,editable ```rust,editable
/* Adding HRTB to make it work!*/ /* Adding HRTB to make it work!*/
fn call_on_ref_zero<'a, F>(f: F) where F: Fn(&'a i32) { fn call_on_ref_zero<'a, F>(f: F) where F: Fn(&'a i32) {
@ -109,7 +109,7 @@ fn call_on_ref_zero<'a, F>(f: F) where F: Fn(&'a i32) {
} }
fn main() { fn main() {
println!("Success!") println!("Success!");
} }
``` ```
## NLL (Non-Lexical Lifetime) ## NLL (Non-Lexical Lifetime)
@ -187,7 +187,7 @@ fn main() {
``` ```
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```rust,editable ```rust,editable
/* Make it work by reordering some code */ /* Make it work by reordering some code */
fn main() { fn main() {
@ -214,7 +214,7 @@ impl<'a> Reader for BufReader<'a> {
// 'a is not used in the following methods // 'a is not used in the following methods
} }
// can be writing as : // can be written as :
impl Reader for BufReader<'_> { impl Reader for BufReader<'_> {
} }
@ -235,7 +235,7 @@ struct Ref<'a, T> {
## A difficult exercise ## A difficult exercise
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```rust,editable ```rust,editable
/* Make it work */ /* Make it work */
struct Interface<'a> { struct Interface<'a> {