Define solThrow() macro to make throwing simple errors less verbose

Author: cameel

libsolutil/Assertions.h

@@ -61,14 +61,9 @@ inline std::string stringOrDefault(std::string _string, std::string _defaultStri
 	do \
 	{ \
 		if (!(_condition)) \
-			::boost::throw_exception( \
-				_exceptionType() << \
-				::solidity::util::errinfo_comment( \
-					::solidity::util::assertions::stringOrDefault(_description, _defaultDescription) \
-				) << \
-				::boost::throw_function(ETH_FUNC) << \
-				::boost::throw_file(__FILE__) << \
-				::boost::throw_line(__LINE__) \
+			solThrow( \
+				_exceptionType, \
+				::solidity::util::assertions::stringOrDefault(_description, _defaultDescription) \
 			); \
 	} \
 	while (false)

libsolutil/Exceptions.h

@@ -43,6 +43,19 @@ struct Exception: virtual std::exception, virtual boost::exception
 private:
 };
 
+/// Throws an exception with a given description and extra information about the location the
+/// exception was thrown from.
+/// @param _exceptionType The type of the exception to throw (not an instance).
+/// @param _description The message that describes the error.
+#define solThrow(_exceptionType, _description) \
+	::boost::throw_exception( \
+		_exceptionType() << \
+		::solidity::util::errinfo_comment(_description) << \
+		::boost::throw_function(ETH_FUNC) << \
+		::boost::throw_file(__FILE__) << \
+		::boost::throw_line(__LINE__) \
+	)
+
 #define DEV_SIMPLE_EXCEPTION(X) struct X: virtual ::solidity::util::Exception { const char* what() const noexcept override { return #X; } }
 
 DEV_SIMPLE_EXCEPTION(InvalidAddress);