Do not show redundant unsupported errors in SMTChecker

liblangutil/UniqueErrorReporter.h

@@ -0,0 +1,94 @@
+/*
+	This file is part of solidity.
+
+	solidity is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	solidity is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with solidity.  If not, see <http://www.gnu.org/licenses/>.
+*/
+// SPDX-License-Identifier: GPL-3.0
+
+#pragma once
+
+#include <liblangutil/ErrorReporter.h>
+#include <liblangutil/Exceptions.h>
+
+namespace solidity::langutil
+{
+
+/*
+ * Wrapper for ErrorReporter that removes duplicates.
+ * Two errors are considered the same if their error ID and location are the same.
+ */
+class UniqueErrorReporter
+{
+public:
+	UniqueErrorReporter(): m_errorReporter(m_uniqueErrors) {}
+
+	void warning(ErrorId _error, SourceLocation const& _location, std::string const& _description)
+	{
+		if (!seen(_error, _location, _description))
+		{
+			m_errorReporter.warning(_error, _location, _description);
+			markAsSeen(_error, _location, _description);
+		}
+	}
+
+	void warning(
+		ErrorId _error,
+		SourceLocation const& _location,
+		std::string const& _description,
+		SecondarySourceLocation const& _secondaryLocation
+	)
+	{
+		if (!seen(_error, _location, _description))
+		{
+			m_errorReporter.warning(_error, _location, _description, _secondaryLocation);
+			markAsSeen(_error, _location, _description);
+		}
+	}
+
+	void warning(ErrorId _error, std::string const& _description)
+	{
+		if (!seen(_error, {}, _description))
+		{
+			m_errorReporter.warning(_error, _description);
+			markAsSeen(_error, {}, _description);
+		}
+	}
+
+	bool seen(ErrorId _error, SourceLocation const& _location, std::string const& _description) const
+	{
+		if (m_seenErrors.count({_error, _location}))
+		{
+			solAssert(m_seenErrors.at({_error, _location}) == _description, "");
+			return true;
+		}
+		return false;
+	}
+
+	void markAsSeen(ErrorId _error, SourceLocation const& _location, std::string const& _description)
+	{
+		solAssert(!seen(_error, _location, _description), "");
+		m_seenErrors[{_error, _location}] = _description;
+	}
+
+	ErrorList const& errors() const { return m_errorReporter.errors(); }
+
+	void clear() { m_errorReporter.clear(); }
+
+private:
+	ErrorReporter m_errorReporter;
+	ErrorList m_uniqueErrors;
+	std::map<std::pair<ErrorId, SourceLocation>, std::string> m_seenErrors;
+};
+
+}