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box up FileEnv's functions

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This commit is contained in:
Paul Campbell 2023-07-30 15:08:26 +01:00
parent e54c136f5a
commit 34fe4da417
1 changed files with 9 additions and 7 deletions
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16
src/file/env.rs
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@ -1,15 +1,19 @@
use std::fs::{File, OpenOptions}; use std::fs::{File, OpenOptions};
use std::io::Write; use std::io::Write;
pub type FileOpenFn = Box<dyn Fn(&str) -> std::io::Result<File>>;
pub type FileAppendLineFn = Box<dyn Fn(&str, &str) -> std::io::Result<()>>;
pub struct FileEnv { pub struct FileEnv {
pub open: FileOpen, pub open: FileOpenFn,
pub append_line: FileAppendLine, pub append_line: FileAppendLineFn,
} }
impl Default for FileEnv { impl Default for FileEnv {
fn default() -> Self { fn default() -> Self {
Self { Self {
open: |path| File::open(path), open: Box::new(|path| File::open(path)),
append_line: |file_name, line| { append_line: Box::new(|file_name, line| {
let mut file = OpenOptions::new() let mut file = OpenOptions::new()
.write(true) .write(true)
.append(true) .append(true)
@ -18,9 +22,7 @@ impl Default for FileEnv {
.unwrap(); .unwrap();
writeln!(file, "{}", line)?; writeln!(file, "{}", line)?;
Ok(()) Ok(())
}, }),
} }
} }
} }
pub type FileOpen = fn(path: &str) -> std::io::Result<File>;
pub type FileAppendLine = fn(paht: &str, line: &str) -> std::io::Result<()>;