box Error container type

src/formats.rs

@@ -1,9 +1,6 @@
 //! The available formats to convert
 use super::*;
 use std::io;
-use std::{
-    error, fmt,
-};
 
 use object::Object;
 
@@ -14,13 +11,11 @@ mod sexpr;
 /// `Format` impl for CBOR.
 mod cbor;
 
-/// Config for the encode/decode
-#[derive(Debug)]
-pub struct Config{
-    //TODO: What goes here?
-    /// Any arbitrary data.
-    pub user: Option<Anything>,
-} 
+pub mod error;
+use error::*;
+
+pub mod config;
+use config::*;
 
 /// A directive for a format on how to encode and decode objects.
 #[derive(Clone, Copy)]
@@ -62,133 +57,4 @@ pub static FORMATS: &[(&'static [&'static str], FormatDirective)] = &[
     directive!(for cbor::CborFormatter => "cbor"),
 ];
 
-/// A formatting error kind. See `Error`.
-#[derive(Debug)]
-pub enum ErrorKind
-{
-    IO(io::Error),
-    Json(serde_json::Error),
-    Cbor(serde_cbor::Error),
-    Lexpr(serde_lexpr::Error),
-    Unknown,
-}
-
-impl From<io::Error> for ErrorKind
-{
-    fn from(from: io::Error) -> Self
-    {
-	Self::IO(from)
-    }
-}
-
-impl From<serde_json::Error> for ErrorKind
-{
-    fn from(from: serde_json::Error) -> Self
-    {
-	Self::Json(from)
-    }
-}
-
-impl From<serde_cbor::Error> for ErrorKind
-{
-    fn from(from: serde_cbor::Error) -> Self
-    {
-	Self::Cbor(from)
-    }
-}
-
-impl From<serde_lexpr::Error> for ErrorKind
-{
-    fn from(from: serde_lexpr::Error) -> Self
-    {
-	Self::Lexpr(from)
-    }
-}
-
-
-/// A formatting error.
-#[derive(Debug)]
-pub struct Error(ErrorKind, bool);
-
-impl Error
-{
-    #[inline(always)] fn into_mode(self, encode: bool) -> Self
-    {
-	Self(self.0, encode)
-    }
-    /// An encode error
-    #[inline] pub fn encode(kind: impl Into<ErrorKind>) -> Self
-    {
-	Self(kind.into(), true)
-    }
-    /// A decode error
-    #[inline] pub fn decode(kind: impl Into<ErrorKind>) -> Self
-    {
-	Self(kind.into(), false)
-    }
-
-    /// What kind of error was it?
-    #[inline] pub fn kind(&self) -> &ErrorKind
-    {
-	&self.0
-    }
-
-    /// Is an encode error? 
-    #[inline] pub fn is_encode(&self) -> bool
-    {
-	self.1
-    }
-    
-    /// Is a decode error? 
-    #[inline] pub fn is_decode(&self) -> bool
-    {
-	!self.1
-    }
-}
-
-impl error::Error for Error
-{
-    fn source(&self) -> Option<&(dyn error::Error + 'static)> {
-	Some(match &self.0 {
-	    ErrorKind::IO(i) => i,
-	    ErrorKind::Json(i) => i,
-	    ErrorKind::Cbor(i) => i,
-	    ErrorKind::Lexpr(i) => i,
-	    _ => return None,
-	})
-    }
-}
-
-impl fmt::Display for Error
-{
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result
-    {
-	write!(f, "formatting error: ")?;
-	if self.1 {
-	    write!(f, "encode")
-	} else {
-	    write!(f, "decode")
-	}
-    }
-}
-
-impl From<(io::Error, bool)> for Error
-{
-    #[inline] fn from(from: (io::Error, bool)) -> Self
-    {
-	Self(ErrorKind::IO(from.0), from.1)
-    }
-}
-
-impl From<Error> for io::Error
-{
-    fn from(from: Error) -> Self
-    {
-	match from.0
-	{
-	    ErrorKind::IO(io) => io,
-	    _ => io::Error::new(io::ErrorKind::Other, from),
-	}
-    }
-}
-
+//const _: &[u8; 0] = &[0u8; std::mem::size_of::<Error>()]; // Size of error type check (unboxed 56 -> boxed 16)

src/formats/config.rs

@@ -0,0 +1,10 @@
+//! Config elements. (If they're needed?)
+use super::*;
+
+/// Config for the encode/decode
+#[derive(Debug, Default)]
+pub struct Config{
+    //TODO: What goes here?
+    ///// Any arbitrary data.
+    //pub user: Option<Anything>,
+}

src/formats/error.rs

@@ -0,0 +1,135 @@
+//! Formatting error(s).
+use super::*;
+use std::{
+    error, fmt,
+};
+
+/// A formatting error kind. See `Error`.
+#[derive(Debug)]
+pub enum ErrorKind
+{
+    IO(io::Error),
+    Json(serde_json::Error),
+    Cbor(serde_cbor::Error),
+    Lexpr(serde_lexpr::Error),
+    Unknown,
+}
+
+impl From<io::Error> for ErrorKind
+{
+    fn from(from: io::Error) -> Self
+    {
+	Self::IO(from)
+    }
+}
+
+impl From<serde_json::Error> for ErrorKind
+{
+    fn from(from: serde_json::Error) -> Self
+    {
+	Self::Json(from)
+    }
+}
+
+impl From<serde_cbor::Error> for ErrorKind
+{
+    fn from(from: serde_cbor::Error) -> Self
+    {
+	Self::Cbor(from)
+    }
+}
+
+impl From<serde_lexpr::Error> for ErrorKind
+{
+    fn from(from: serde_lexpr::Error) -> Self
+    {
+	Self::Lexpr(from)
+    }
+}
+
+
+/// A formatting error.
+#[derive(Debug)]
+pub struct Error(Box<ErrorKind>, bool);
+
+impl Error
+{
+    #[inline(always)] fn into_mode(self, encode: bool) -> Self
+    {
+	Self(self.0, encode)
+    }
+    /// An encode error
+    #[inline] pub fn encode(kind: impl Into<ErrorKind>) -> Self
+    {
+	Self(Box::new(kind.into()), true)
+    }
+    /// A decode error
+    #[inline] pub fn decode(kind: impl Into<ErrorKind>) -> Self
+    {
+	Self(Box::new(kind.into()), false)
+    }
+
+    /// What kind of error was it?
+    #[inline] pub fn kind(&self) -> &ErrorKind
+    {
+	&self.0
+    }
+
+    /// Is an encode error? 
+    #[inline] pub fn is_encode(&self) -> bool
+    {
+	self.1
+    }
+    
+    /// Is a decode error? 
+    #[inline] pub fn is_decode(&self) -> bool
+    {
+	!self.1
+    }
+}
+
+impl error::Error for Error
+{
+    fn source(&self) -> Option<&(dyn error::Error + 'static)> {
+	Some(match self.0.as_ref() {
+	    ErrorKind::IO(i) => i,
+	    ErrorKind::Json(i) => i,
+	    ErrorKind::Cbor(i) => i,
+	    ErrorKind::Lexpr(i) => i,
+	    _ => return None,
+	})
+    }
+}
+
+impl fmt::Display for Error
+{
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result
+    {
+	write!(f, "formatting error: ")?;
+	if self.1 {
+	    write!(f, "encode")
+	} else {
+	    write!(f, "decode")
+	}
+    }
+}
+
+impl From<(io::Error, bool)> for Error
+{
+    #[inline] fn from(from: (io::Error, bool)) -> Self
+    {
+	Self(Box::new(ErrorKind::IO(from.0)), from.1)
+    }
+}
+
+impl From<Error> for io::Error
+{
+    fn from(from: Error) -> Self
+    {
+	match *from.0
+	{
+	    ErrorKind::IO(io) => io,
+	    _ => io::Error::new(io::ErrorKind::Other, from),
+	}
+    }
+}