Add easy lifetime problems
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# Lifetime
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**Lifetimes**
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1. 🌟
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```rust,editable
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/* Make it work */
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#[derive(Debug)]
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struct NoCopyType {}
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#[derive(Debug)]
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struct Example<'a, 'b> {
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a: &'a u32,
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b: &'b NoCopyType
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}
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fn main()
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{
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/* 'a tied to fn-main stackframe */
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let var_a = 35;
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let example: Example;
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// {
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/* lifetime 'b tied to new stackframe/scope */
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let var_b = NoCopyType {};
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/* fixme */
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example = Example { a: &var_a, b: &var_b };
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// }
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println!("(Success!) {:?}", example);
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}
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```
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2. 🌟
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```rust,editable
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#[derive(Debug)]
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struct NoCopyType {}
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#[derive(Debug)]
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#[allow(dead_code)]
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struct Example<'a, 'b> {
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a: &'a u32,
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b: &'b NoCopyType
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}
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/* Fix function signature */
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fn fix_me<'b>(foo: &Example<'b>) -> &'b NoCopyType
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{ foo.b }
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fn main()
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{
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let no_copy = NoCopyType {};
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let example = Example { a: &1, b: &no_copy };
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fix_me(&example);
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print!("Success!")
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}
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```
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@ -23,4 +23,68 @@ fn args<'a, 'b, T: ToCStr>(&'a mut self, args: &'b [T]) -> &'a mut Command // ex
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fn new(buf: &mut [u8]) -> BufWriter; // elided
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fn new(buf: &mut [u8]) -> BufWriter<'_>; // elided (with `rust_2018_idioms`)
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fn new<'a>(buf: &'a mut [u8]) -> BufWriter<'a> // expanded
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```
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```
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**Lifetimes**
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1. 🌟
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```rust,editable
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/* Make it work */
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#[derive(Debug)]
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struct NoCopyType {}
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#[derive(Debug)]
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struct Example<'a, 'b> {
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a: &'a u32,
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b: &'b NoCopyType
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}
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fn main()
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{
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/* 'a tied to fn-main stackframe */
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let var_a = 35;
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let example: Example;
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{
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/* lifetime 'b tied to new stackframe/scope */
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let var_b = NoCopyType {};
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/* fixme */
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example = Example { a: &var_a, b: &var_b };
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}
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println!("(Success!) {:?}", example);
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}
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```
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2. 🌟
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```rust,editable
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#[derive(Debug)]
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struct NoCopyType {}
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#[derive(Debug)]
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#[allow(dead_code)]
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struct Example<'a, 'b> {
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a: &'a u32,
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b: &'b NoCopyType
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}
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/* Fix function signature */
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fn fix_me(foo: &Example) -> &NoCopyType
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{ foo.b }
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fn main()
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{
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let no_copy = NoCopyType {};
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let example = Example { a: &1, b: &no_copy };
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fix_me(&example);
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print!("Success!")
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}
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```
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