Support multiple assembly front and backends.

1 files changed, 85 insertions, 0 deletions

diff --git a/libsolidity/interface/MultiBackendAssemblyStack.h b/libsolidity/interface/MultiBackendAssemblyStack.h
new file mode 100644
index 00000000..fed9e8f9
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+++ b/libsolidity/interface/MultiBackendAssemblyStack.h
@@ -0,0 +1,85 @@
+/*
+	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/>.
+*/
+/**
+ * Full assembly stack that can support EVM-assembly and JULIA as input and EVM, EVM1.5 and
+ * eWasm as output.
+ */
+
+#pragma once
+
+#include <libsolidity/interface/Exceptions.h>
+#include <libsolidity/inlineasm/AsmAnalysisInfo.h>
+#include <libevmasm/LinkerObject.h>
+
+#include <string>
+#include <memory>
+
+namespace dev
+{
+namespace solidity
+{
+class Scanner;
+namespace assembly
+{
+struct AsmAnalysisInfo;
+struct Block;
+}
+
+/*
+ * Full assembly stack that can support EVM-assembly and JULIA as input and EVM, EVM1.5 and
+ * eWasm as output.
+ */
+class MultiBackendAssemblyStack
+{
+public:
+	enum class Input { JULIA, Assembly };
+	enum class Machine { EVM, EVM15, eWasm };
+
+	MultiBackendAssemblyStack(Input _input = Input::Assembly, Machine _targetMachine = Machine::EVM):
+		m_input(_input),
+		m_targetMachine(_targetMachine)
+	{}
+
+	/// @returns the scanner used during parsing
+	Scanner const& scanner() const;
+
+	/// Runs parsing and analysis steps, returns false if input cannot be assembled.
+	bool parseAndAnalyze(std::string const& _sourceName, std::string const& _source);
+
+	/// Run the assembly step (should only be called after parseAndAnalyze).
+	eth::LinkerObject assemble();
+
+	ErrorList const& errors() const { return m_errors; }
+
+	/// Pretty-print the input after having parsed it.
+	std::string print();
+
+private:
+
+	Input m_input = Input::Assembly;
+	Machine m_targetMachine = Machine::EVM;
+
+	std::shared_ptr<Scanner> m_scanner;
+
+	bool m_analysisSuccessful = false;
+	std::shared_ptr<assembly::Block> m_parserResult;
+	std::shared_ptr<assembly::AsmAnalysisInfo> m_analysisInfo;
+	ErrorList m_errors;
+};
+
+}
+}