Init.

1 files changed, 38 insertions, 0 deletions

diff --git a/rust-book/errors/src/main.rs b/rust-book/errors/src/main.rs
new file mode 100755
index 0000000..1250677
--- /dev/null
+++ b/rust-book/errors/src/main.rs
@@ -0,0 +1,38 @@
+use std::io;
+use std::io::Read;
+use std::fs::File;
+//use std::io::ErrorKind;
+
+fn read_username_from_file() -> Result<String, io::Error> {
+//    let f = File::open("hello.txt");
+//    let mut f = match f {
+//        Ok(file) => file,
+//        Err(e) => return Err(e),
+//    };
+//    let mut s = String::new();
+//    match f.read_to_string(&mut s) {
+//        Ok(_) => Ok(s),
+//        Err(e) => Err(e),
+//    }
+    let mut s = String::new();
+    File::open("hello.txt")?.read_to_string(&mut s)?;
+    Ok(s)
+}
+fn main() {
+//    let f = File::open("hello.txt").map_err(|error| {
+//        if error.kind() == ErrorKind::NotFound {
+//            File::create("hello.txt").unwrap_or_else(|error| {
+//                panic!("Could not create file: {:?}", error);
+//            })
+//        }
+//        else {
+//            panic!("Problem opening file: {:?}", error);
+//        }
+//    });
+    
+    //let f = File::open("hello.txt").unwrap();
+
+    //let f = File::open("hello.txt").expect("failed to open hello.txt");
+
+    dbg!(read_username_from_file());
+}