From bef6354109dbf7880cc094dbcac5c6af41042c9a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=AD=99=E9=A3=9E?= <sunfei@sunfeideMacBook-Pro.local>
Date: Fri, 11 Feb 2022 14:42:25 +0800
Subject: [PATCH] add skeleton

---
 .gitignore             |  1 +
 book.toml              | 20 +++++++++++++++++
 src/SUMMARY.md         |  4 ++++
 src/lifetime/intro.md  |  1 +
 src/lifetime/static.md | 49 ++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 75 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 book.toml
 create mode 100644 src/SUMMARY.md
 create mode 100644 src/lifetime/intro.md
 create mode 100644 src/lifetime/static.md

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..7585238
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+book
diff --git a/book.toml b/book.toml
new file mode 100644
index 0000000..8de752d
--- /dev/null
+++ b/book.toml
@@ -0,0 +1,20 @@
+[book]
+title = "Rust Exercise"
+description = "A set of exercises and examples to pratice various aspects of Rust, also for the rust course (book) at https://course.rs"
+authors = ["course.rs"]
+language = "en"
+multilingual = false
+src = "src"
+
+[output.html.playpen]
+editable = true
+editor = "ace"
+
+[output.html.fold]
+enable = true
+
+[output.html]
+git-repository-url = "https://github.com/course-rs/rust-exercise"
+
+[rust]
+edition = "2021"
\ No newline at end of file
diff --git a/src/SUMMARY.md b/src/SUMMARY.md
new file mode 100644
index 0000000..67c21db
--- /dev/null
+++ b/src/SUMMARY.md
@@ -0,0 +1,4 @@
+# Summary
+
+- [Lifetime](lifetime/intro.md)
+  - [&'static and T: 'static](lifetime/static.md)
\ No newline at end of file
diff --git a/src/lifetime/intro.md b/src/lifetime/intro.md
new file mode 100644
index 0000000..2615315
--- /dev/null
+++ b/src/lifetime/intro.md
@@ -0,0 +1 @@
+# Lifetime
diff --git a/src/lifetime/static.md b/src/lifetime/static.md
new file mode 100644
index 0000000..782446e
--- /dev/null
+++ b/src/lifetime/static.md
@@ -0,0 +1,49 @@
+# &'static and T: 'static
+
+```rust,editable
+use std::fmt::Display;
+
+fn main() {
+  let mut string = "First".to_owned();
+
+  string.push_str(string.to_uppercase().as_str());
+  print_a(&string);
+  print_b(&string);
+  print_c(&string); // Compilation error
+  print_d(&string); // Compilation error
+  print_e(&string);
+  print_f(&string);
+  print_g(&string); // Compilation error
+}
+
+fn print_a<T: Display + 'static>(t: &T) {
+  println!("{}", t);
+}
+
+fn print_b<T>(t: &T)
+where
+  T: Display + 'static,
+{
+  println!("{}", t);
+}
+
+fn print_c(t: &'static dyn Display) {
+  println!("{}", t)
+}
+
+fn print_d(t: &'static impl Display) {
+  println!("{}", t)
+}
+
+fn print_e(t: &(dyn Display + 'static)) {
+  println!("{}", t)
+}
+
+fn print_f(t: &(impl Display + 'static)) {
+  println!("{}", t)
+}
+
+fn print_g(t: &'static String) {
+  println!("{}", t);
+}
+```
\ No newline at end of file