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https://github.com/ethereum/solidity
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Merge pull request #415 from chriseth/sol_expressionCompiler
Solidity expression compiler
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chriseth
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solidityCompiler.cpp
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229
solidityCompiler.cpp
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/*
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This file is part of cpp-ethereum.
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cpp-ethereum is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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cpp-ethereum is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @author Christian <c@ethdev.com>
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* @date 2014
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* Unit tests for the name and type resolution of the solidity parser.
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*/
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#include <string>
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#include <libdevcore/Log.h>
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#include <libsolidity/Scanner.h>
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#include <libsolidity/Parser.h>
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#include <libsolidity/NameAndTypeResolver.h>
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#include <libsolidity/Compiler.h>
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#include <libsolidity/AST.h>
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#include <boost/test/unit_test.hpp>
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namespace dev
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{
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namespace solidity
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{
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namespace test
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{
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namespace
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{
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/**
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* Helper class that extracts the first expression in an AST.
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*/
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class FirstExpressionExtractor: private ASTVisitor
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{
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public:
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FirstExpressionExtractor(ASTNode& _node): m_expression(nullptr) { _node.accept(*this); }
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Expression* getExpression() const { return m_expression; }
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private:
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virtual bool visit(Expression& _expression) override { return checkExpression(_expression); }
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virtual bool visit(Assignment& _expression) override { return checkExpression(_expression); }
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virtual bool visit(UnaryOperation& _expression) override { return checkExpression(_expression); }
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virtual bool visit(BinaryOperation& _expression) override { return checkExpression(_expression); }
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virtual bool visit(FunctionCall& _expression) override { return checkExpression(_expression); }
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virtual bool visit(MemberAccess& _expression) override { return checkExpression(_expression); }
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virtual bool visit(IndexAccess& _expression) override { return checkExpression(_expression); }
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virtual bool visit(PrimaryExpression& _expression) override { return checkExpression(_expression); }
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virtual bool visit(Identifier& _expression) override { return checkExpression(_expression); }
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virtual bool visit(ElementaryTypeNameExpression& _expression) override { return checkExpression(_expression); }
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virtual bool visit(Literal& _expression) override { return checkExpression(_expression); }
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bool checkExpression(Expression& _expression)
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{
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if (m_expression == nullptr)
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m_expression = &_expression;
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return false;
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}
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private:
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Expression* m_expression;
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};
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bytes compileFirstExpression(std::string const& _sourceCode)
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{
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Parser parser;
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ASTPointer<ContractDefinition> contract;
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BOOST_REQUIRE_NO_THROW(contract = parser.parse(std::make_shared<Scanner>(CharStream(_sourceCode))));
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NameAndTypeResolver resolver;
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BOOST_REQUIRE_NO_THROW(resolver.resolveNamesAndTypes(*contract));
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FirstExpressionExtractor extractor(*contract);
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BOOST_REQUIRE(extractor.getExpression() != nullptr);
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CompilerContext context;
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ExpressionCompiler compiler(context);
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compiler.compile(*extractor.getExpression());
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bytes instructions = compiler.getAssembledBytecode();
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// debug
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//std::cout << eth::disassemble(instructions) << std::endl;
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return instructions;
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}
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} // end anonymous namespace
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BOOST_AUTO_TEST_SUITE(SolidityExpressionCompiler)
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BOOST_AUTO_TEST_CASE(literal_true)
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{
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char const* sourceCode = "contract test {\n"
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" function f() { var x = true; }"
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"}\n";
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bytes code = compileFirstExpression(sourceCode);
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bytes expectation({byte(eth::Instruction::PUSH1), 0x1});
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BOOST_CHECK_EQUAL_COLLECTIONS(code.begin(), code.end(), expectation.begin(), expectation.end());
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}
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BOOST_AUTO_TEST_CASE(literal_false)
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{
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char const* sourceCode = "contract test {\n"
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" function f() { var x = false; }"
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"}\n";
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bytes code = compileFirstExpression(sourceCode);
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bytes expectation({byte(eth::Instruction::PUSH1), 0x0});
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BOOST_CHECK_EQUAL_COLLECTIONS(code.begin(), code.end(), expectation.begin(), expectation.end());
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}
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BOOST_AUTO_TEST_CASE(int_literal)
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{
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char const* sourceCode = "contract test {\n"
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" function f() { var x = 0x12345678901234567890; }"
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"}\n";
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bytes code = compileFirstExpression(sourceCode);
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bytes expectation({byte(eth::Instruction::PUSH10), 0x12, 0x34, 0x56, 0x78, 0x90,
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0x12, 0x34, 0x56, 0x78, 0x90});
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BOOST_CHECK_EQUAL_COLLECTIONS(code.begin(), code.end(), expectation.begin(), expectation.end());
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}
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BOOST_AUTO_TEST_CASE(comparison)
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{
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char const* sourceCode = "contract test {\n"
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" function f() { var x = (0x10aa < 0x11aa) != true; }"
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"}\n";
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bytes code = compileFirstExpression(sourceCode);
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bytes expectation({byte(eth::Instruction::PUSH2), 0x10, 0xaa,
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byte(eth::Instruction::PUSH2), 0x11, 0xaa,
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byte(eth::Instruction::GT),
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byte(eth::Instruction::PUSH1), 0x1,
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byte(eth::Instruction::EQ),
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byte(eth::Instruction::NOT)});
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BOOST_CHECK_EQUAL_COLLECTIONS(code.begin(), code.end(), expectation.begin(), expectation.end());
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}
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BOOST_AUTO_TEST_CASE(short_circuiting)
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{
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char const* sourceCode = "contract test {\n"
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" function f() { var x = (10 + 8 >= 4 || 2 != 9) != true; }"
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"}\n";
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bytes code = compileFirstExpression(sourceCode);
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bytes expectation({byte(eth::Instruction::PUSH1), 0xa,
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byte(eth::Instruction::PUSH1), 0x8,
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byte(eth::Instruction::ADD),
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byte(eth::Instruction::PUSH1), 0x4,
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byte(eth::Instruction::GT),
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byte(eth::Instruction::NOT), // after this we have 10 + 8 >= 4
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byte(eth::Instruction::DUP1),
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byte(eth::Instruction::PUSH1), 0x14,
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byte(eth::Instruction::JUMPI), // short-circuit if it is true
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byte(eth::Instruction::PUSH1), 0x2,
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byte(eth::Instruction::PUSH1), 0x9,
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byte(eth::Instruction::EQ),
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byte(eth::Instruction::NOT), // after this we have 2 != 9
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byte(eth::Instruction::JUMPDEST),
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byte(eth::Instruction::PUSH1), 0x1,
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byte(eth::Instruction::EQ),
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byte(eth::Instruction::NOT)});
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BOOST_CHECK_EQUAL_COLLECTIONS(code.begin(), code.end(), expectation.begin(), expectation.end());
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}
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BOOST_AUTO_TEST_CASE(arithmetics)
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{
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char const* sourceCode = "contract test {\n"
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" function f() { var x = (1 * (2 / (3 % (4 + (5 - (6 | (7 & (8 ^ 9)))))))); }"
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"}\n";
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bytes code = compileFirstExpression(sourceCode);
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bytes expectation({byte(eth::Instruction::PUSH1), 0x1,
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byte(eth::Instruction::PUSH1), 0x2,
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byte(eth::Instruction::PUSH1), 0x3,
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byte(eth::Instruction::PUSH1), 0x4,
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byte(eth::Instruction::PUSH1), 0x5,
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byte(eth::Instruction::PUSH1), 0x6,
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byte(eth::Instruction::PUSH1), 0x7,
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byte(eth::Instruction::PUSH1), 0x8,
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byte(eth::Instruction::PUSH1), 0x9,
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byte(eth::Instruction::XOR),
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byte(eth::Instruction::AND),
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byte(eth::Instruction::OR),
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byte(eth::Instruction::SWAP1),
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byte(eth::Instruction::SUB),
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byte(eth::Instruction::ADD),
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byte(eth::Instruction::MOD),
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byte(eth::Instruction::DIV),
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byte(eth::Instruction::MUL)});
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BOOST_CHECK_EQUAL_COLLECTIONS(code.begin(), code.end(), expectation.begin(), expectation.end());
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}
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BOOST_AUTO_TEST_CASE(unary_operators)
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{
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char const* sourceCode = "contract test {\n"
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" function f() { var x = !(~+-(--(++1++)--) == 2); }"
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"}\n";
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bytes code = compileFirstExpression(sourceCode);
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bytes expectation({byte(eth::Instruction::PUSH1), 0x1,
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byte(eth::Instruction::PUSH1), 0x1,
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byte(eth::Instruction::ADD),
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byte(eth::Instruction::PUSH1), 0x1,
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byte(eth::Instruction::SWAP1),
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byte(eth::Instruction::SUB),
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byte(eth::Instruction::PUSH1), 0x0,
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byte(eth::Instruction::SUB),
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byte(eth::Instruction::BNOT),
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byte(eth::Instruction::PUSH1), 0x2,
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byte(eth::Instruction::EQ),
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byte(eth::Instruction::NOT)});
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BOOST_CHECK_EQUAL_COLLECTIONS(code.begin(), code.end(), expectation.begin(), expectation.end());
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}
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BOOST_AUTO_TEST_SUITE_END()
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}
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}
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} // end namespaces
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@ -38,7 +38,7 @@ namespace test
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namespace
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{
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void parseTextAndResolveNames(const std::string& _source)
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void parseTextAndResolveNames(std::string const& _source)
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{
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Parser parser;
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ASTPointer<ContractDefinition> contract = parser.parse(
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@ -37,7 +37,7 @@ namespace test
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namespace
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{
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ASTPointer<ASTNode> parseText(const std::string& _source)
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ASTPointer<ASTNode> parseText(std::string const& _source)
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{
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Parser parser;
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return parser.parse(std::make_shared<Scanner>(CharStream(_source)));
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