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authorAdam Carpenter <53hornet@gmail.com>2019-03-21 17:10:15 -0400
committerAdam Carpenter <53hornet@gmail.com>2019-03-21 17:10:15 -0400
commit333965318a5d000140d54be2a2a9e0832372f271 (patch)
treee7f28b53144982cfdf2cb95c9d71e5ea7a566b77 /advanced/adv-lifetimes/src
parent2fadb006603139c335ed8df8fa9c25402986c4fd (diff)
downloadlearning-rust-333965318a5d000140d54be2a2a9e0832372f271.tar.xz
learning-rust-333965318a5d000140d54be2a2a9e0832372f271.zip
Added advanced features.
Diffstat (limited to 'advanced/adv-lifetimes/src')
-rw-r--r--advanced/adv-lifetimes/src/main.rs36
1 files changed, 36 insertions, 0 deletions
diff --git a/advanced/adv-lifetimes/src/main.rs b/advanced/adv-lifetimes/src/main.rs
new file mode 100644
index 0000000..755baf4
--- /dev/null
+++ b/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)
+}
+