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492 lines
18 KiB
492 lines
18 KiB
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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 solidity expression compiler.
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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/CompilerContext.h>
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#include <libsolidity/ExpressionCompiler.h>
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#include <libsolidity/AST.h>
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#include <boost/test/unit_test.hpp>
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using namespace std;
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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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/// Helper class that extracts the first expression in an AST.
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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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Declaration const& resolveDeclaration(vector<string> const& _namespacedName,
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NameAndTypeResolver const& _resolver)
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{
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Declaration const* declaration = nullptr;
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// bracers are required, cause msvc couldnt handle this macro in for statement
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for (string const& namePart: _namespacedName)
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{
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BOOST_REQUIRE(declaration = _resolver.resolveName(namePart, declaration));
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}
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BOOST_REQUIRE(declaration);
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return *declaration;
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}
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bytes compileFirstExpression(const string& _sourceCode, vector<vector<string>> _functions = {},
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vector<vector<string>> _localVariables = {},
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vector<shared_ptr<MagicVariableDeclaration const>> _globalDeclarations = {})
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{
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Parser parser;
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ASTPointer<SourceUnit> sourceUnit;
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try
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{
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sourceUnit = parser.parse(make_shared<Scanner>(CharStream(_sourceCode)));
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}
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catch(boost::exception const& _e)
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{
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auto msg = std::string("Parsing source code failed with: \n") + boost::diagnostic_information(_e);
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BOOST_FAIL(msg);
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}
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vector<Declaration const*> declarations;
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declarations.reserve(_globalDeclarations.size() + 1);
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for (ASTPointer<Declaration const> const& variable: _globalDeclarations)
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declarations.push_back(variable.get());
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NameAndTypeResolver resolver(declarations);
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resolver.registerDeclarations(*sourceUnit);
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vector<ContractDefinition const*> inheritanceHierarchy;
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for (ASTPointer<ASTNode> const& node: sourceUnit->getNodes())
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if (ContractDefinition* contract = dynamic_cast<ContractDefinition*>(node.get()))
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{
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BOOST_REQUIRE_NO_THROW(resolver.resolveNamesAndTypes(*contract));
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inheritanceHierarchy = vector<ContractDefinition const*>(1, contract);
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}
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for (ASTPointer<ASTNode> const& node: sourceUnit->getNodes())
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if (ContractDefinition* contract = dynamic_cast<ContractDefinition*>(node.get()))
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{
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BOOST_REQUIRE_NO_THROW(resolver.checkTypeRequirements(*contract));
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}
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for (ASTPointer<ASTNode> const& node: sourceUnit->getNodes())
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if (ContractDefinition* contract = dynamic_cast<ContractDefinition*>(node.get()))
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{
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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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context.setInheritanceHierarchy(inheritanceHierarchy);
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unsigned parametersSize = _localVariables.size(); // assume they are all one slot on the stack
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context.adjustStackOffset(parametersSize);
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for (vector<string> const& variable: _localVariables)
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context.addVariable(dynamic_cast<VariableDeclaration const&>(resolveDeclaration(variable, resolver)),
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parametersSize--);
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ExpressionCompiler::compileExpression(context, *extractor.getExpression());
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for (vector<string> const& function: _functions)
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context << context.getFunctionEntryLabel(dynamic_cast<FunctionDefinition const&>(resolveDeclaration(function, resolver)));
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bytes instructions = context.getAssembledBytecode();
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// debug
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// cout << eth::disassemble(instructions) << endl;
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return instructions;
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}
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BOOST_FAIL("No contract found in source.");
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return bytes();
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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(int_with_wei_ether_subdenomination)
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{
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char const* sourceCode = R"(
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contract test {
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function test ()
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{
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var x = 1 wei;
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}
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})";
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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(int_with_szabo_ether_subdenomination)
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{
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char const* sourceCode = R"(
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contract test {
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function test ()
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{
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var x = 1 szabo;
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}
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})";
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bytes code = compileFirstExpression(sourceCode);
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bytes expectation({byte(eth::Instruction::PUSH5), 0xe8, 0xd4, 0xa5, 0x10, 0x00});
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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_with_finney_ether_subdenomination)
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{
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char const* sourceCode = R"(
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contract test {
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function test ()
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{
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var x = 1 finney;
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}
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})";
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bytes code = compileFirstExpression(sourceCode);
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bytes expectation({byte(eth::Instruction::PUSH7), 0x3, 0x8d, 0x7e, 0xa4, 0xc6, 0x80, 0x00});
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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_with_ether_ether_subdenomination)
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{
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char const* sourceCode = R"(
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contract test {
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function test ()
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{
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var x = 1 ether;
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}
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})";
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bytes code = compileFirstExpression(sourceCode);
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bytes expectation({byte(eth::Instruction::PUSH8), 0xd, 0xe0, 0xb6, 0xb3, 0xa7, 0x64, 0x00, 0x00});
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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::PUSH1), 0x1,
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byte(eth::Instruction::PUSH2), 0x11, 0xaa,
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byte(eth::Instruction::PUSH2), 0x10, 0xaa,
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byte(eth::Instruction::LT),
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byte(eth::Instruction::EQ),
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byte(eth::Instruction::ISZERO)});
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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 = true != (4 <= 8 + 10 || 9 != 2); }"
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"}\n";
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bytes code = compileFirstExpression(sourceCode);
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bytes expectation({byte(eth::Instruction::PUSH1), 0x12, // 8 + 10
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byte(eth::Instruction::PUSH1), 0x4,
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byte(eth::Instruction::GT),
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byte(eth::Instruction::ISZERO), // after this we have 4 <= 8 + 10
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byte(eth::Instruction::DUP1),
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byte(eth::Instruction::PUSH1), 0x11,
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byte(eth::Instruction::JUMPI), // short-circuit if it is true
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byte(eth::Instruction::POP),
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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::ISZERO), // after this we have 9 != 2
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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::ISZERO)});
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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(uint y) { var x = ((((((((y ^ 8) & 7) | 6) - 5) + 4) % 3) / 2) * 1); }"
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"}\n";
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bytes code = compileFirstExpression(sourceCode, {}, {{"test", "f", "y"}, {"test", "f", "x"}});
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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::DUP10),
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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::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(int y) { var x = !(~+- y == 2); }"
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"}\n";
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bytes code = compileFirstExpression(sourceCode, {}, {{"test", "f", "y"}, {"test", "f", "x"}});
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bytes expectation({byte(eth::Instruction::PUSH1), 0x2,
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byte(eth::Instruction::DUP3),
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byte(eth::Instruction::PUSH1), 0x0,
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byte(eth::Instruction::SUB),
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byte(eth::Instruction::NOT),
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byte(eth::Instruction::EQ),
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byte(eth::Instruction::ISZERO)});
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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_inc_dec)
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{
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char const* sourceCode = "contract test {\n"
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" function f(uint a) { var x = --a ^ (a-- ^ (++a ^ a++)); }"
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"}\n";
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bytes code = compileFirstExpression(sourceCode, {}, {{"test", "f", "a"}, {"test", "f", "x"}});
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// Stack: a, x
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bytes expectation({byte(eth::Instruction::DUP2),
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byte(eth::Instruction::DUP1),
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byte(eth::Instruction::PUSH1), 0x1,
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byte(eth::Instruction::ADD),
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// Stack here: a x a (a+1)
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byte(eth::Instruction::SWAP3),
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byte(eth::Instruction::POP), // first ++
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// Stack here: (a+1) x a
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byte(eth::Instruction::DUP3),
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byte(eth::Instruction::PUSH1), 0x1,
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byte(eth::Instruction::ADD),
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// Stack here: (a+1) x a (a+2)
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byte(eth::Instruction::SWAP3),
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byte(eth::Instruction::POP),
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// Stack here: (a+2) x a
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byte(eth::Instruction::DUP3), // second ++
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byte(eth::Instruction::XOR),
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// Stack here: (a+2) x a^(a+2)
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byte(eth::Instruction::DUP3),
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byte(eth::Instruction::DUP1),
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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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// Stack here: (a+2) x a^(a+2) (a+2) (a+1)
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byte(eth::Instruction::SWAP4),
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byte(eth::Instruction::POP), // first --
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byte(eth::Instruction::XOR),
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// Stack here: (a+1) x a^(a+2)^(a+2)
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byte(eth::Instruction::DUP3),
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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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// Stack here: (a+1) x a^(a+2)^(a+2) a
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byte(eth::Instruction::SWAP3),
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byte(eth::Instruction::POP), // second ++
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// Stack here: a x a^(a+2)^(a+2)
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byte(eth::Instruction::DUP3), // will change
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byte(eth::Instruction::XOR)});
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// Stack here: a x a^(a+2)^(a+2)^a
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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(assignment)
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{
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char const* sourceCode = "contract test {\n"
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" function f(uint a, uint b) { (a += b) * 2; }"
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"}\n";
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bytes code = compileFirstExpression(sourceCode, {}, {{"test", "f", "a"}, {"test", "f", "b"}});
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// Stack: a, b
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bytes expectation({byte(eth::Instruction::PUSH1), 0x2,
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byte(eth::Instruction::DUP2),
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byte(eth::Instruction::DUP4),
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byte(eth::Instruction::ADD),
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// Stack here: a b 2 a+b
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byte(eth::Instruction::SWAP3),
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byte(eth::Instruction::POP),
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byte(eth::Instruction::DUP3),
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// Stack here: a+b b 2 a+b
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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(function_call)
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{
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char const* sourceCode = "contract test {\n"
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" function f(uint a, uint b) { a += g(a + 1, b) * 2; }\n"
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" function g(uint a, uint b) returns (uint c) {}\n"
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"}\n";
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bytes code = compileFirstExpression(sourceCode, {{"test", "g"}},
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{{"test", "f", "a"}, {"test", "f", "b"}});
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// Stack: a, b
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bytes expectation({byte(eth::Instruction::PUSH1), 0x02,
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byte(eth::Instruction::PUSH1), 0x0c,
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byte(eth::Instruction::PUSH1), 0x01,
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byte(eth::Instruction::DUP5),
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byte(eth::Instruction::ADD),
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// Stack here: a b 2 <ret label> (a+1)
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byte(eth::Instruction::DUP4),
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byte(eth::Instruction::PUSH1), 0x13,
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byte(eth::Instruction::JUMP),
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byte(eth::Instruction::JUMPDEST),
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// Stack here: a b 2 g(a+1, b)
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byte(eth::Instruction::MUL),
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// Stack here: a b g(a+1, b)*2
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byte(eth::Instruction::DUP3),
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byte(eth::Instruction::ADD),
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// Stack here: a b a+g(a+1, b)*2
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byte(eth::Instruction::SWAP2),
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byte(eth::Instruction::POP),
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byte(eth::Instruction::DUP2),
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byte(eth::Instruction::JUMPDEST)});
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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(negative_literals_8bits)
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{
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char const* sourceCode = "contract test {\n"
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" function f() { int8 x = -0x80; }\n"
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"}\n";
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bytes code = compileFirstExpression(sourceCode);
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bytes expectation(bytes({byte(eth::Instruction::PUSH32)}) + bytes(31, 0xff) + bytes(1, 0x80));
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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(negative_literals_16bits)
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{
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char const* sourceCode = "contract test {\n"
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" function f() { int64 x = ~0xabc; }\n"
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"}\n";
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bytes code = compileFirstExpression(sourceCode);
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bytes expectation(bytes({byte(eth::Instruction::PUSH32)}) + bytes(30, 0xff) + bytes{0xf5, 0x43});
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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(intermediately_overflowing_literals)
|
|
{
|
|
// first literal itself is too large for 256 bits but it fits after all constant operations
|
|
// have been applied
|
|
char const* sourceCode = "contract test {\n"
|
|
" function f() { var x = (0xffffffffffffffffffffffffffffffffffffffff * 0xffffffffffffffffffffffffff01) & 0xbf; }\n"
|
|
"}\n";
|
|
bytes code = compileFirstExpression(sourceCode);
|
|
|
|
bytes expectation(bytes({byte(eth::Instruction::PUSH1), 0xbf}));
|
|
BOOST_CHECK_EQUAL_COLLECTIONS(code.begin(), code.end(), expectation.begin(), expectation.end());
|
|
}
|
|
|
|
BOOST_AUTO_TEST_CASE(blockhash)
|
|
{
|
|
char const* sourceCode = "contract test {\n"
|
|
" function f() {\n"
|
|
" block.blockhash(3);\n"
|
|
" }\n"
|
|
"}\n";
|
|
bytes code = compileFirstExpression(sourceCode, {}, {},
|
|
{make_shared<MagicVariableDeclaration>("block", make_shared<MagicType>(MagicType::Kind::BLOCK))});
|
|
|
|
bytes expectation({byte(eth::Instruction::PUSH1), 0x03,
|
|
byte(eth::Instruction::BLOCKHASH)});
|
|
BOOST_CHECK_EQUAL_COLLECTIONS(code.begin(), code.end(), expectation.begin(), expectation.end());
|
|
}
|
|
|
|
BOOST_AUTO_TEST_SUITE_END()
|
|
|
|
}
|
|
}
|
|
} // end namespaces
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|
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