Merge pull request #5571 from ethereum/develop

Version 0.5.1

1 files changed, 82 insertions, 0 deletions

diff --git a/libyul/AsmScopeFiller.h b/libyul/AsmScopeFiller.h
new file mode 100644
index 00000000..e8fb88d5
--- /dev/null
+++ b/libyul/AsmScopeFiller.h
@@ -0,0 +1,82 @@
+/*
+	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/>.
+*/
+/**
+ * Module responsible for registering identifiers inside their scopes.
+ */
+
+#pragma once
+
+#include <libyul/AsmDataForward.h>
+
+#include <boost/variant.hpp>
+
+#include <functional>
+#include <memory>
+
+namespace langutil
+{
+class ErrorReporter;
+struct SourceLocation;
+}
+
+namespace yul
+{
+
+struct TypedName;
+struct Scope;
+struct AsmAnalysisInfo;
+
+/**
+ * Fills scopes with identifiers and checks for name clashes.
+ * Does not resolve references.
+ */
+class ScopeFiller: public boost::static_visitor<bool>
+{
+public:
+	ScopeFiller(AsmAnalysisInfo& _info, langutil::ErrorReporter& _errorReporter);
+
+	bool operator()(Instruction const&) { return true; }
+	bool operator()(Literal const&) { return true; }
+	bool operator()(Identifier const&) { return true; }
+	bool operator()(FunctionalInstruction const&) { return true; }
+	bool operator()(ExpressionStatement const& _expr);
+	bool operator()(Label const& _label);
+	bool operator()(StackAssignment const&) { return true; }
+	bool operator()(Assignment const&) { return true; }
+	bool operator()(VariableDeclaration const& _variableDeclaration);
+	bool operator()(FunctionDefinition const& _functionDefinition);
+	bool operator()(FunctionCall const&) { return true; }
+	bool operator()(If const& _if);
+	bool operator()(Switch const& _switch);
+	bool operator()(ForLoop const& _forLoop);
+	bool operator()(Block const& _block);
+
+private:
+	bool registerVariable(
+		TypedName const& _name,
+		langutil::SourceLocation const& _location,
+		Scope& _scope
+	);
+
+	Scope& scope(Block const* _block);
+
+	Scope* m_currentScope = nullptr;
+	AsmAnalysisInfo& m_info;
+	langutil::ErrorReporter& m_errorReporter;
+};
+
+}