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-rwxr-xr-xrust-book/advanced/adv-lifetimes/src/main.rs36
1 files changed, 36 insertions, 0 deletions
diff --git a/rust-book/advanced/adv-lifetimes/src/main.rs b/rust-book/advanced/adv-lifetimes/src/main.rs
new file mode 100755
index 0000000..755baf4
--- /dev/null
+++ b/rust-book/advanced/adv-lifetimes/src/main.rs
@@ -0,0 +1,36 @@
+fn main() {
+ let num = 5;
+
+ let obj = Box::new(Ball { diameter: &num }) as Box<dyn Red>;
+}
+
+struct Context<'s>(&'s str);
+
+struct Parser<'c, 's: 'c> {
+ context: &'c Context<'s>,
+}
+
+impl<'c, 's> Parser<'c, 's> {
+ fn parse(&self) -> Result<(), &'s str> {
+ Err(&self.context.0[1..])
+ }
+}
+
+fn parse_context(context: Context) -> Result<(), &str> {
+ Parser { context: &context }.parse()
+}
+
+trait Red { }
+
+struct Ball<'a> {
+ diameter: &'a i32,
+}
+
+impl<'a> Red for Ball<'a> { }
+
+struct StrWrap<'a>(&'a str);
+
+fn foo(string: &str) -> StrWrap<'_> {
+ StrWrap(string)
+}
+