Port try macro to new ? operator. (#3962)

* initial untry sweep

* restore try in ipc codegen, fix inference

* change a few missed try instances

ethkey/src/bin/ethkey.rs

@@ -160,37 +160,37 @@ fn execute<S, I>(command: I) -> Result<String, Error> where I: IntoIterator<Item
 
 	return if args.cmd_info {
 		let display_mode = DisplayMode::new(&args);
-		let secret = try!(args.arg_secret.parse().map_err(|_| EthkeyError::InvalidSecret));
-		let keypair = try!(KeyPair::from_secret(secret));
+		let secret = args.arg_secret.parse().map_err(|_| EthkeyError::InvalidSecret)?;
+		let keypair = KeyPair::from_secret(secret)?;
 		Ok(display(keypair, display_mode))
 	} else if args.cmd_generate {
 		let display_mode = DisplayMode::new(&args);
 		let keypair = if args.cmd_random {
 			Random.generate()
 		} else if args.cmd_prefix {
-			let prefix = try!(args.arg_prefix.from_hex());
-			let iterations = try!(usize::from_str_radix(&args.arg_iterations, 10));
+			let prefix = args.arg_prefix.from_hex()?;
+			let iterations = usize::from_str_radix(&args.arg_iterations, 10)?;
 			Prefix::new(prefix, iterations).generate()
 		} else if args.cmd_brain {
 			Brain::new(args.arg_seed).generate()
 		} else {
 			unreachable!();
 		};
-		Ok(display(try!(keypair), display_mode))
+		Ok(display(keypair?, display_mode))
 	} else if args.cmd_sign {
-		let secret = try!(args.arg_secret.parse().map_err(|_| EthkeyError::InvalidSecret));
-		let message = try!(args.arg_message.parse().map_err(|_| EthkeyError::InvalidMessage));
-		let signature = try!(sign(&secret, &message));
+		let secret = args.arg_secret.parse().map_err(|_| EthkeyError::InvalidSecret)?;
+		let message = args.arg_message.parse().map_err(|_| EthkeyError::InvalidMessage)?;
+		let signature = sign(&secret, &message)?;
 		Ok(format!("{}", signature))
 	} else if args.cmd_verify {
-		let signature = try!(args.arg_signature.parse().map_err(|_| EthkeyError::InvalidSignature));
-		let message = try!(args.arg_message.parse().map_err(|_| EthkeyError::InvalidMessage));
+		let signature = args.arg_signature.parse().map_err(|_| EthkeyError::InvalidSignature)?;
+		let message = args.arg_message.parse().map_err(|_| EthkeyError::InvalidMessage)?;
 		let ok = if args.cmd_public {
-			let public = try!(args.arg_public.parse().map_err(|_| EthkeyError::InvalidPublic));
-			try!(verify_public(&public, &signature, &message))
+			let public = args.arg_public.parse().map_err(|_| EthkeyError::InvalidPublic)?;
+			verify_public(&public, &signature, &message)?
 		} else if args.cmd_address {
-			let address = try!(args.arg_address.parse().map_err(|_| EthkeyError::InvalidAddress));
-			try!(verify_address(&address, &signature, &message))
+			let address = args.arg_address.parse().map_err(|_| EthkeyError::InvalidAddress)?;
+			verify_address(&address, &signature, &message)?
 		} else {
 			unreachable!();
 		};

ethkey/src/keypair.rs

@@ -35,8 +35,8 @@ pub struct KeyPair {
 
 impl fmt::Display for KeyPair {
 	fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
-		try!(writeln!(f, "secret:  {}", self.secret.to_hex()));
-		try!(writeln!(f, "public:  {}", self.public.to_hex()));
+		writeln!(f, "secret:  {}", self.secret.to_hex())?;
+		writeln!(f, "public:  {}", self.public.to_hex())?;
 		write!(f, "address: {}", self.address().to_hex())
 	}
 }
@@ -45,8 +45,8 @@ impl KeyPair {
 	/// Create a pair from secret key
 	pub fn from_secret(secret: Secret) -> Result<KeyPair, Error> {
 		let context = &SECP256K1;
-		let s: key::SecretKey = try!(key::SecretKey::from_slice(context, &secret[..]));
-		let pub_key = try!(key::PublicKey::from_secret_key(context, &s));
+		let s: key::SecretKey = key::SecretKey::from_slice(context, &secret[..])?;
+		let pub_key = key::PublicKey::from_secret_key(context, &s)?;
 		let serialized = pub_key.serialize_vec(context, false);
 
 		let mut public = Public::default();

ethkey/src/prefix.rs

@@ -34,7 +34,7 @@ impl Prefix {
 impl Generator for Prefix {
 	fn generate(self) -> Result<KeyPair, Error> {
 		for _ in 0..self.iterations {
-			let keypair = try!(Random.generate());
+			let keypair = Random.generate()?;
 			if keypair.address().starts_with(&self.prefix) {
 				return Ok(keypair)
 			}

ethkey/src/random.rs

@@ -23,8 +23,8 @@ pub struct Random;
 impl Generator for Random {
 	fn generate(self) -> Result<KeyPair, Error> {
 		let context = &SECP256K1;
-		let mut rng = try!(OsRng::new());
-		let (sec, publ) = try!(context.generate_keypair(&mut rng));
+		let mut rng = OsRng::new()?;
+		let (sec, publ) = context.generate_keypair(&mut rng)?;
 
 		Ok(KeyPair::from_keypair(sec, publ))
 	}

ethkey/src/signature.rs

@@ -171,7 +171,7 @@ pub fn sign(secret: &Secret, message: &Message) -> Result<Signature, Error> {
 	let context = &SECP256K1;
 	// no way to create from raw byte array.
 	let sec: &SecretKey = unsafe { mem::transmute(secret) };
-	let s = try!(context.sign_recoverable(&try!(SecpMessage::from_slice(&message[..])), sec));
+	let s = context.sign_recoverable(&SecpMessage::from_slice(&message[..])?, sec)?;
 	let (rec_id, data) = s.serialize_compact(context);
 	let mut data_arr = [0; 65];
 
@@ -183,7 +183,7 @@ pub fn sign(secret: &Secret, message: &Message) -> Result<Signature, Error> {
 
 pub fn verify_public(public: &Public, signature: &Signature, message: &Message) -> Result<bool, Error> {
 	let context = &SECP256K1;
-	let rsig = try!(RecoverableSignature::from_compact(context, &signature[0..64], try!(RecoveryId::from_i32(signature[64] as i32))));
+	let rsig = RecoverableSignature::from_compact(context, &signature[0..64], RecoveryId::from_i32(signature[64] as i32)?)?;
 	let sig = rsig.to_standard(context);
 
 	let pdata: [u8; 65] = {
@@ -192,8 +192,8 @@ pub fn verify_public(public: &Public, signature: &Signature, message: &Message)
 		temp
 	};
 
-	let publ = try!(PublicKey::from_slice(context, &pdata));
-	match context.verify(&try!(SecpMessage::from_slice(&message[..])), &sig, &publ) {
+	let publ = PublicKey::from_slice(context, &pdata)?;
+	match context.verify(&SecpMessage::from_slice(&message[..])?, &sig, &publ) {
 		Ok(_) => Ok(true),
 		Err(SecpError::IncorrectSignature) => Ok(false),
 		Err(x) => Err(Error::from(x))
@@ -201,15 +201,15 @@ pub fn verify_public(public: &Public, signature: &Signature, message: &Message)
 }
 
 pub fn verify_address(address: &Address, signature: &Signature, message: &Message) -> Result<bool, Error> {
-	let public = try!(recover(signature, message));
+	let public = recover(signature, message)?;
 	let recovered_address = public_to_address(&public);
 	Ok(address == &recovered_address)
 }
 
 pub fn recover(signature: &Signature, message: &Message) -> Result<Public, Error> {
 	let context = &SECP256K1;
-	let rsig = try!(RecoverableSignature::from_compact(context, &signature[0..64], try!(RecoveryId::from_i32(signature[64] as i32))));
-	let pubkey = try!(context.recover(&try!(SecpMessage::from_slice(&message[..])), &rsig));
+	let rsig = RecoverableSignature::from_compact(context, &signature[0..64], RecoveryId::from_i32(signature[64] as i32)?)?;
+	let pubkey = context.recover(&SecpMessage::from_slice(&message[..])?, &rsig)?;
 	let serialized = pubkey.serialize_vec(context, false);
 
 	let mut public = Public::default();