ch09 エラー処理の和訳を最新版に更新

rust-lang/book@19c40bf

Author: shinmili

listings/ch09-error-handling/listing-09-01/Cargo.toml

@@ -1,7 +1,6 @@
 [package]
 name = "panic"
 version = "0.1.0"
-authors = ["Your Name <you@example.com>"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]

listings/ch09-error-handling/listing-09-01/output.txt

@@ -2,5 +2,8 @@ $ cargo run
    Compiling panic v0.1.0 (file:///projects/panic)
     Finished dev [unoptimized + debuginfo] target(s) in 0.27s
      Running `target/debug/panic`
-thread 'main' panicked at 'index out of bounds: the len is 3 but the index is 99', /rustc/5e1a799842ba6ed4a57e91f7ab9435947482f7d8/src/libcore/slice/mod.rs:2806:10
-note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace.
+thread 'main' panicked at src/main.rs:4:6:
+index out of bounds: the len is 3 but the index is 99
+('main'スレッドはsrc/main.rs:4:6でパニックしました:
+境界外番号: 長さは3なのに、添え字は99です)
+note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

listings/ch09-error-handling/listing-09-03/Cargo.toml

@@ -1,7 +1,6 @@
 [package]
 name = "error-handling"
 version = "0.1.0"
-authors = ["Your Name <you@example.com>"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]

listings/ch09-error-handling/listing-09-03/src/main.rs

@@ -1,5 +1,5 @@
 use std::fs::File;
 
 fn main() {
-    let f = File::open("hello.txt");
+    let greeting_file_result = File::open("hello.txt");
 }

listings/ch09-error-handling/listing-09-04/Cargo.toml

@@ -1,7 +1,6 @@
 [package]
 name = "error-handling"
 version = "0.1.0"
-authors = ["Your Name <you@example.com>"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]

listings/ch09-error-handling/listing-09-04/output.txt

@@ -2,5 +2,8 @@ $ cargo run
    Compiling error-handling v0.1.0 (file:///projects/error-handling)
     Finished dev [unoptimized + debuginfo] target(s) in 0.73s
      Running `target/debug/error-handling`
-thread 'main' panicked at 'Problem opening the file: Os { code: 2, kind: NotFound, message: "No such file or directory" }', src/main.rs:8:23
-note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace.
+thread 'main' panicked at src/main.rs:8:23:
+Problem opening the file: Os { code: 2, kind: NotFound, message: "No such file or directory" }
+('main'スレッドは、src/main.rs:8:23でパニックしました:
+ファイルを開く際に問題がありました: Os { code: 2, kind: NotFound, message: "そのようなファイルやディレクトリはありません" })
+note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

listings/ch09-error-handling/listing-09-04/src/main.rs

@@ -1,10 +1,11 @@
 use std::fs::File;
 
 fn main() {
-    let f = File::open("hello.txt");
+    let greeting_file_result = File::open("hello.txt");
 
-    let f = match f {
+    let greeting_file = match greeting_file_result {
         Ok(file) => file,
+        //                   "ファイルを開くのに問題がありました: {:?}"
         Err(error) => panic!("Problem opening the file: {:?}", error),
     };
 }

listings/ch09-error-handling/listing-09-05/Cargo.toml

@@ -1,7 +1,6 @@
 [package]
 name = "error-handling"
 version = "0.1.0"
-authors = ["Your Name <you@example.com>"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]

listings/ch09-error-handling/listing-09-05/src/main.rs

@@ -2,17 +2,19 @@ use std::fs::File;
 use std::io::ErrorKind;
 
 fn main() {
-    let f = File::open("hello.txt");
+    let greeting_file_result = File::open("hello.txt");
 
-    let f = match f {
+    let greeting_file = match greeting_file_result {
         Ok(file) => file,
         Err(error) => match error.kind() {
             ErrorKind::NotFound => match File::create("hello.txt") {
                 Ok(fc) => fc,
+                //               "ファイルを作成するのに問題がありました: {:?}"
                 Err(e) => panic!("Problem creating the file: {:?}", e),
             },
             other_error => {
-                panic!("Problem opening the file: {:?}", other_error)
+                //     "ファイルを開くのに問題がありました: {:?}"
+                panic!("Problem opening the file: {:?}", other_error);
             }
         },
     };

listings/ch09-error-handling/listing-09-06/Cargo.toml

@@ -1,7 +1,6 @@
 [package]
 name = "error-handling"
 version = "0.1.0"
-authors = ["Your Name <you@example.com>"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]