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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
* Code-generating part of inline assembly.
*/
#pragma once
#include <functional>
#include <libsolidity/interface/Exceptions.h>
namespace dev
{
namespace eth
{
class Assembly;
}
namespace solidity
{
namespace assembly
{
struct Block;
struct Identifier;
class CodeGenerator
{
public:
enum class IdentifierContext { LValue, RValue };
/// Function type that is called for external identifiers. Such a function should search for
/// the identifier and append appropriate assembly items to the assembly. If in lvalue context,
/// the value to assign is assumed to be on the stack and an assignment is to be performed.
/// If in rvalue context, the function is assumed to append instructions to
/// push the value of the identifier onto the stack. On error, the function should return false.
using IdentifierAccess = std::function<bool(assembly::Identifier const&, eth::Assembly&, IdentifierContext)>;
CodeGenerator(Block const& _parsedData, ErrorList& _errors):
m_parsedData(_parsedData), m_errors(_errors) {}
/// Performs type checks and @returns false on error.
/// Actually runs the full code generation but discards the result.
bool typeCheck(IdentifierAccess const& _identifierAccess = IdentifierAccess());
/// Performs code generation and @returns the result.
eth::Assembly assemble(IdentifierAccess const& _identifierAccess = IdentifierAccess());
/// Performs code generation and appends generated to to _assembly.
void assemble(eth::Assembly& _assembly, IdentifierAccess const& _identifierAccess = IdentifierAccess());
private:
Block const& m_parsedData;
ErrorList& m_errors;
};
}
}
}
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