Added default features: buffer-output, ignore-output-errors

Fortune for reverse's current commit: Half blessing − 半吉

Cargo.toml

@@ -1,13 +1,13 @@
 [package]
 name = "reverse"
-version = "0.2.0"
+version = "0.2.1"
 authors = ["Avril <flanchan@cumallover.me>"]
 edition = "2018"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [features]
-default = ["output-lines"]
+default = ["output-lines", "buffer-output", "ignore-output-errors"]
 
 # Output as lines instead of `["2", "1", "0"]`
 output-lines = []
@@ -18,7 +18,8 @@ output-quoted = []
 # Buffer output to conserve syscalls, useful for very large inputs (can cause higher memory usage, but generally speeds output up considerably)
 buffer-output = []
 
-# Do not attempt to handle output errors
+# Do not attempt to handle output errors.
+# Disable this if you are writing to a faulty device or expect some output operations to stdout to fail.
 ignore-output-errors = []
 
 [profile.release]

src/main.rs

@@ -46,11 +46,13 @@ fn collect_input() -> Box<dyn Iterator<Item=String> + 'static>
     }
 }
 
-#[inline(always)]
+#[cfg_attr(feature="ignore-output-errors", inline(always))]
 fn handle_fmt_err<T>(res: std::io::Result<T>)
 {
     #[cfg(not(feature="ignore-output-errors"))]
-    res.expect("[!] failed to write");
+    if let Err(e) = res {
+	eprintln!("[!] failed to write line: {e}");
+    }
     let _ = res;
 }
 
@@ -82,7 +84,7 @@ fn main() {
 	    });
 	}
 	//#[cfg(feature="buffer-output")] 
-	handle_fmt_err(out.flush());
+	handle_fmt_err(out.flush()); //XXX: Do we need to flush when not buffering output? Does it matter since buffering output will be enabled by default and should almost always be enabled?
     }
     #[cfg(not(feature="output-lines"))]
     println!("{:?}", args);