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authorAdam Carpenter <53hornet@gmail.com>2019-03-27 15:32:37 -0400
committerAdam Carpenter <53hornet@gmail.com>2019-03-27 15:32:37 -0400
commit67cdcc2e12118becb823e20a40cc2687f2b8425a (patch)
treeed92c3234b89079e6d4cf36f5e80c5ffa79def48 /lifetimes/src
parente25482fca375d318a39c3b54db396b0db6e0b263 (diff)
downloadlearning-rust-67cdcc2e12118becb823e20a40cc2687f2b8425a.tar.xz
learning-rust-67cdcc2e12118becb823e20a40cc2687f2b8425a.zip
Started Rust in Action MEAP.
Diffstat (limited to 'lifetimes/src')
-rw-r--r--lifetimes/src/main.rs43
1 files changed, 0 insertions, 43 deletions
diff --git a/lifetimes/src/main.rs b/lifetimes/src/main.rs
deleted file mode 100644
index 87b6ce6..0000000
--- a/lifetimes/src/main.rs
+++ /dev/null
@@ -1,43 +0,0 @@
-fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
- // what this is doing is basically tagging x and y and the
- // result with the same 'a, telling rust not to let any
- // of them expire before the others; that way nothing
- // will go out of scope prematurely and the result will
- // always have a non-null reference
-
- // basically, 'a gives all three values the same lifetime.
- // so long as they're all alive at the same time, there are
- // no reference errors
-
- // note that the lifetime selected for the result is
- // equal to the smaller of the lifetimes of the
- // parameters
-
- if x.len() > y.len() {
- x
- }
- else {
- y
- }
-}
-
-struct ImportantExcerpt<'a> {
- part: &'a str,
-}
-
-fn main() {
- let string1 = String::from("abcd");
- {
- let string2 = "xyz";
-
- let result = longest(string1.as_str(), string2);
- //dbg!(result);
- }
-
- let script = String::from("Before time began, there was the cube. We know not where it comes from.");
- let first_sentence = script.split('.')
- .next()
- .expect("Could not find a '.'");
- let i = ImportantExcerpt { part: first_sentence };
- dbg!(i.part);
-}