Minor refactoring

src/commands/verify_program.rs

@@ -20,63 +20,42 @@ where
 	};
 
 	// TODO: rename to read_specification
-	match crate::input::parse_specification(&specification_content, &mut problem)
+	if let Err(error) = crate::input::parse_specification(&specification_content, &mut problem)
-	{
-		Ok(_) => (),
-		Err(error) =>
 	{
 		log::error!("could not read specification: {}", error);
 		std::process::exit(1)
 	}
-	}
 
 	log::info!("read specification “{}”", specification_path.as_ref().display());
 
 	log::info!("reading input program “{}”", program_path.as_ref().display());
 
 	// TODO: make consistent with specification call (path vs. content)
-	match crate::translate::verify_properties::Translator::new(&mut problem).translate(program_path)
+	if let Err(error) = crate::translate::verify_properties::Translator::new(&mut problem)
-	{
+		.translate(program_path)
-		Ok(_) => (),
-		Err(error) =>
 	{
 		log::error!("could not translate input program: {}", error);
 		std::process::exit(1)
 	}
-	}
 
-	match problem.check_consistency(proof_direction)
+	if let Err(error) = problem.check_consistency(proof_direction)
-	{
-		Ok(_) => (),
-		Err(error) =>
 	{
 		log::error!("{}", error);
 		std::process::exit(1)
 	}
-	}
 
 	if !no_simplify
 	{
-		match problem.simplify()
+		if let Err(error) = problem.simplify()
-		{
-			Ok(_) => (),
-			Err(error) =>
 		{
 			log::error!("could not simplify translated program: {}", error);
 			std::process::exit(1)
 		}
 	}
-	}
 
-	match problem.prove(proof_direction)
+	if let Err(error) = problem.prove(proof_direction)
-	{
-		Ok(()) => (),
-		Err(error) =>
 	{
 		log::error!("could not verify program: {}", error);
 		std::process::exit(1)
 	}
 }
-
-	log::info!("done");
-}