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authorAdam Carpenter <gitlab@53hor.net>2019-07-09 15:14:04 -0400
committerAdam Carpenter <gitlab@53hor.net>2019-07-09 15:14:04 -0400
commit7e8ee5ed9cad6484e9f13f81731b102ced58402e (patch)
tree5395402ab07bbb5a659dbd68c701e22a1227202f /rust-book/blog/src
downloadlearning-rust-7e8ee5ed9cad6484e9f13f81731b102ced58402e.tar.xz
learning-rust-7e8ee5ed9cad6484e9f13f81731b102ced58402e.zip
Init.
Diffstat (limited to 'rust-book/blog/src')
-rwxr-xr-xrust-book/blog/src/lib.rs127
-rwxr-xr-xrust-book/blog/src/main.rs36
2 files changed, 163 insertions, 0 deletions
diff --git a/rust-book/blog/src/lib.rs b/rust-book/blog/src/lib.rs
new file mode 100755
index 0000000..8436a36
--- /dev/null
+++ b/rust-book/blog/src/lib.rs
@@ -0,0 +1,127 @@
+//pub struct Post {
+// state: Option<Box<dyn State>>,
+// content: String,
+//}
+//
+//impl Post {
+// pub fn new() -> Post {
+// Post {
+// state: Some(Box::new(Draft {})),
+// content: String::new(),
+// }
+// }
+//
+// pub fn add_text(&mut self, text: &str) {
+// self.content.push_str(text);
+// }
+//
+// pub fn content(&self) -> &str {
+// self.state.as_ref().unwrap().content(&self)
+// }
+//
+// pub fn request_review(&mut self) {
+// if let Some(s) = self.state.take() {
+// self.state = Some(s.request_review())
+// }
+// }
+//
+// pub fn approve(&mut self) {
+// if let Some(s) = self.state.take() {
+// self.state = Some(s.approve())
+// }
+// }
+//}
+//
+//trait State {
+// fn request_review(self: Box<Self>) -> Box<dyn State>;
+// fn approve(self: Box<Self>) -> Box<dyn State>;
+// fn content<'a>(&self, post: &'a Post) -> &'a str {
+// ""
+// }
+//}
+//
+//struct Draft {}
+//
+//impl State for Draft {
+// fn request_review(self: Box<Self>) -> Box<dyn State> {
+// Box::new(PendingReview {})
+// }
+//
+// fn approve(self: Box<Self>) -> Box<dyn State> {
+// self
+// }
+//}
+//
+//struct PendingReview {}
+//
+//impl State for PendingReview {
+// fn request_review(self: Box<Self>) -> Box<dyn State> {
+// self
+// }
+//
+// fn approve(self: Box<Self>) -> Box<dyn State> {
+// Box::new(Published {})
+// }
+//}
+//
+//struct Published {}
+//
+//impl State for Published {
+// fn request_review(self: Box<Self>) -> Box<dyn State> {
+// self
+// }
+//
+// fn approve(self: Box<Self>) -> Box<dyn State> {
+// self
+// }
+//
+// fn content<'a>(&self, post: &'a Post) -> &'a str {
+// &post.content
+// }
+//}
+
+
+
+pub struct Post {
+ content: String,
+}
+
+pub struct DraftPost {
+ content: String,
+}
+
+pub struct PendingReviewPost {
+ content: String,
+}
+
+impl Post {
+ pub fn new() -> DraftPost {
+ DraftPost {
+ content: String::new(),
+ }
+ }
+
+ pub fn content(&self) -> &str {
+ &self.content
+ }
+}
+
+impl DraftPost {
+ pub fn add_text(&mut self, text: &str) {
+ self.content.push_str(text);
+ }
+
+ pub fn request_review(self) -> PendingReviewPost {
+ PendingReviewPost {
+ content: self.content,
+ }
+ }
+}
+
+impl PendingReviewPost {
+ pub fn approve(self) -> Post {
+ Post {
+ content: self.content,
+ }
+ }
+}
diff --git a/rust-book/blog/src/main.rs b/rust-book/blog/src/main.rs
new file mode 100755
index 0000000..c976cd9
--- /dev/null
+++ b/rust-book/blog/src/main.rs
@@ -0,0 +1,36 @@
+use blog::Post;
+
+fn main() {
+// let mut post = Post::new();
+//
+// post.add_text("salad");
+// assert_eq!("", post.content());
+//
+// post.request_review();
+// assert_eq!("", post.content());
+//
+// post.approve();
+// assert_eq!("salad", post.content());
+
+
+
+// let mut post = Post::new();
+// post.add_text("salad");
+// assert_eq!("", post.content());
+
+
+
+ let mut post = Post::new();
+
+ post.add_text("salad");
+ let post = post.request_review();
+ let post = post.approve();
+
+ assert_eq!("salad", post.content());
+
+
+
+
+
+ println!("Done.");
+}