Merge pull request #430 from chriseth/assembly

Inline Assembly

1 files changed, 64 insertions, 0 deletions

diff --git a/libsolidity/inlineasm/AsmData.h b/libsolidity/inlineasm/AsmData.h
new file mode 100644
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+++ b/libsolidity/inlineasm/AsmData.h
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+/*
+	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
+{
+namespace assembly
+{
+
+/// What follows are the AST nodes for assembly.
+
+/// 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; };
+
+}
+}
+}