Parsing for inline assembly.

1 files changed, 70 insertions, 0 deletions

diff --git a/libsolidity/inlineasm/AsmData.h b/libsolidity/inlineasm/AsmData.h
new file mode 100644
index 00000000..a38a9d36
--- /dev/null
+++ b/libsolidity/inlineasm/AsmData.h
@@ -0,0 +1,70 @@
+/*
+	This file is part of cpp-ethereum.
+
+	cpp-ethereum 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.
+
+	cpp-ethereum 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 cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/**
+ * @author Christian <c@ethdev.com>
+ * @date 2016
+ * Parsed inline assembly to be used by the AST
+ */
+
+#pragma once
+
+#include <boost/variant.hpp>
+#include <libevmcore/Instruction.h>
+
+namespace dev
+{
+namespace solidity
+{
+
+class AsmData
+{
+public:
+	/// Direct EVM instruction (except PUSHi and JUMPDEST)
+	struct Instruction { eth::Instruction instruction; };
+	/// Literal number or string (up to 32 bytes)
+	struct Literal { bool isNumber; std::string value; };
+	/// External / internal identifier or label reference
+	struct Identifier { std::string name; };
+	struct FunctionalInstruction;
+	/// Jump label ("name:")
+	struct Label { std::string name; };
+	/// Assignemnt (":= x", moves stack top into x, potentially multiple slots)
+	struct Assignment { Identifier variableName; };
+	struct FunctionalAssignment;
+	struct VariableDeclaration;
+	struct Block;
+	using Statement = boost::variant<Instruction, Literal, Label, Assignment, Identifier, FunctionalAssignment, FunctionalInstruction, VariableDeclaration, Block>;
+	/// Functional assignment ("x := mload(20)", expects push-1-expression on the right hand
+	/// side and requires x to occupy exactly one stack slot.
+	struct FunctionalAssignment { Identifier variableName; std::shared_ptr<Statement> value; };
+	/// Functional instruction, e.g. "mul(mload(20), add(2, x))"
+	struct FunctionalInstruction { Instruction instruction; std::vector<Statement> arguments; };
+	/// Block-scope variable declaration ("let x := mload(20)"), non-hoisted
+	struct VariableDeclaration { std::string name; std::shared_ptr<Statement> value; };
+	/// Block that creates a scope (frees declared stack variables)
+	struct Block { std::vector<Statement> statements; };
+
+	AsmData(Block&& _statements): m_statements(_statements) {}
+
+	Block const& statements() const { return m_statements; }
+
+private:
+	Block m_statements;
+};
+
+}
+}