mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
285 lines
8.9 KiB
C++
285 lines
8.9 KiB
C++
/*
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This file is part of solidity.
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solidity 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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solidity 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 solidity. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <libsolidity/analysis/SyntaxChecker.h>
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#include <memory>
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#include <libsolidity/ast/AST.h>
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#include <libsolidity/ast/ExperimentalFeatures.h>
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#include <libsolidity/analysis/SemVerHandler.h>
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#include <libsolidity/interface/ErrorReporter.h>
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#include <libsolidity/interface/Version.h>
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using namespace std;
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using namespace dev;
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using namespace dev::solidity;
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bool SyntaxChecker::checkSyntax(ASTNode const& _astRoot)
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{
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_astRoot.accept(*this);
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return Error::containsOnlyWarnings(m_errorReporter.errors());
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}
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bool SyntaxChecker::visit(SourceUnit const& _sourceUnit)
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{
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m_versionPragmaFound = false;
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m_sourceUnit = &_sourceUnit;
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return true;
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}
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void SyntaxChecker::endVisit(SourceUnit const& _sourceUnit)
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{
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if (!m_versionPragmaFound)
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{
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string errorString("Source file does not specify required compiler version!");
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SemVerVersion recommendedVersion{string(VersionString)};
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if (!recommendedVersion.isPrerelease())
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errorString +=
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"Consider adding \"pragma solidity ^" +
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to_string(recommendedVersion.major()) +
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string(".") +
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to_string(recommendedVersion.minor()) +
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string(".") +
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to_string(recommendedVersion.patch()) +
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string(";\"");
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m_errorReporter.warning(_sourceUnit.location(), errorString);
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}
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m_sourceUnit = nullptr;
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}
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bool SyntaxChecker::visit(PragmaDirective const& _pragma)
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{
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solAssert(!_pragma.tokens().empty(), "");
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solAssert(_pragma.tokens().size() == _pragma.literals().size(), "");
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if (_pragma.tokens()[0] != Token::Identifier)
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m_errorReporter.syntaxError(_pragma.location(), "Invalid pragma \"" + _pragma.literals()[0] + "\"");
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else if (_pragma.literals()[0] == "experimental")
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{
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solAssert(m_sourceUnit, "");
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vector<string> literals(_pragma.literals().begin() + 1, _pragma.literals().end());
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if (literals.size() == 0)
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m_errorReporter.syntaxError(
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_pragma.location(),
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"Experimental feature name is missing."
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);
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else if (literals.size() > 1)
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m_errorReporter.syntaxError(
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_pragma.location(),
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"Stray arguments."
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);
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else
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{
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string const literal = literals[0];
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if (literal.empty())
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m_errorReporter.syntaxError(_pragma.location(), "Empty experimental feature name is invalid.");
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else if (!ExperimentalFeatureNames.count(literal))
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m_errorReporter.syntaxError(_pragma.location(), "Unsupported experimental feature name.");
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else if (m_sourceUnit->annotation().experimentalFeatures.count(ExperimentalFeatureNames.at(literal)))
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m_errorReporter.syntaxError(_pragma.location(), "Duplicate experimental feature name.");
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else
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{
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auto feature = ExperimentalFeatureNames.at(literal);
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m_sourceUnit->annotation().experimentalFeatures.insert(feature);
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if (!ExperimentalFeatureOnlyAnalysis.count(feature))
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m_errorReporter.warning(_pragma.location(), "Experimental features are turned on. Do not use experimental features on live deployments.");
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}
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}
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}
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else if (_pragma.literals()[0] == "solidity")
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{
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vector<Token::Value> tokens(_pragma.tokens().begin() + 1, _pragma.tokens().end());
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vector<string> literals(_pragma.literals().begin() + 1, _pragma.literals().end());
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SemVerMatchExpressionParser parser(tokens, literals);
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auto matchExpression = parser.parse();
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SemVerVersion currentVersion{string(VersionString)};
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if (!matchExpression.matches(currentVersion))
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m_errorReporter.syntaxError(
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_pragma.location(),
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"Source file requires different compiler version (current compiler is " +
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string(VersionString) + " - note that nightly builds are considered to be "
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"strictly less than the released version"
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);
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m_versionPragmaFound = true;
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}
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else
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m_errorReporter.syntaxError(_pragma.location(), "Unknown pragma \"" + _pragma.literals()[0] + "\"");
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return true;
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}
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bool SyntaxChecker::visit(ModifierDefinition const&)
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{
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m_placeholderFound = false;
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return true;
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}
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void SyntaxChecker::endVisit(ModifierDefinition const& _modifier)
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{
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if (!m_placeholderFound)
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m_errorReporter.syntaxError(_modifier.body().location(), "Modifier body does not contain '_'.");
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m_placeholderFound = false;
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}
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bool SyntaxChecker::visit(WhileStatement const&)
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{
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m_inLoopDepth++;
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return true;
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}
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void SyntaxChecker::endVisit(WhileStatement const&)
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{
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m_inLoopDepth--;
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}
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bool SyntaxChecker::visit(ForStatement const&)
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{
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m_inLoopDepth++;
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return true;
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}
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void SyntaxChecker::endVisit(ForStatement const&)
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{
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m_inLoopDepth--;
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}
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bool SyntaxChecker::visit(Continue const& _continueStatement)
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{
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if (m_inLoopDepth <= 0)
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// we're not in a for/while loop, report syntax error
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m_errorReporter.syntaxError(_continueStatement.location(), "\"continue\" has to be in a \"for\" or \"while\" loop.");
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return true;
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}
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bool SyntaxChecker::visit(Break const& _breakStatement)
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{
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if (m_inLoopDepth <= 0)
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// we're not in a for/while loop, report syntax error
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m_errorReporter.syntaxError(_breakStatement.location(), "\"break\" has to be in a \"for\" or \"while\" loop.");
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return true;
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}
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bool SyntaxChecker::visit(Throw const& _throwStatement)
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{
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bool const v050 = m_sourceUnit->annotation().experimentalFeatures.count(ExperimentalFeature::V050);
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if (v050)
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m_errorReporter.syntaxError(
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_throwStatement.location(),
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"\"throw\" is deprecated in favour of \"revert()\", \"require()\" and \"assert()\"."
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);
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else
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m_errorReporter.warning(
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_throwStatement.location(),
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"\"throw\" is deprecated in favour of \"revert()\", \"require()\" and \"assert()\"."
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);
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return true;
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}
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bool SyntaxChecker::visit(UnaryOperation const& _operation)
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{
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bool const v050 = m_sourceUnit->annotation().experimentalFeatures.count(ExperimentalFeature::V050);
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if (_operation.getOperator() == Token::Add)
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{
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if (v050)
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m_errorReporter.syntaxError(_operation.location(), "Use of unary + is deprecated.");
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else
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m_errorReporter.warning(_operation.location(), "Use of unary + is deprecated.");
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}
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return true;
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}
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bool SyntaxChecker::visit(PlaceholderStatement const&)
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{
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m_placeholderFound = true;
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return true;
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}
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bool SyntaxChecker::visit(FunctionDefinition const& _function)
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{
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bool const v050 = m_sourceUnit->annotation().experimentalFeatures.count(ExperimentalFeature::V050);
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if (v050 && _function.noVisibilitySpecified())
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m_errorReporter.syntaxError(_function.location(), "No visibility specified.");
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if (_function.isOldStyleConstructor())
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{
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if (v050)
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m_errorReporter.syntaxError(
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_function.location(),
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"Functions are not allowed to have the same name as the contract. "
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"If you intend this to be a constructor, use \"constructor(...) { ... }\" to define it."
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);
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else
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m_errorReporter.warning(
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_function.location(),
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"Defining constructors as functions with the same name as the contract is deprecated. "
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"Use \"constructor(...) { ... }\" instead."
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);
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}
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if (!_function.isImplemented() && !_function.modifiers().empty())
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{
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if (v050)
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m_errorReporter.syntaxError(_function.location(), "Functions without implementation cannot have modifiers.");
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else
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m_errorReporter.warning( _function.location(), "Modifiers of functions without implementation are ignored." );
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}
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return true;
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}
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bool SyntaxChecker::visit(FunctionTypeName const& _node)
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{
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for (auto const& decl: _node.parameterTypeList()->parameters())
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if (!decl->name().empty())
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m_errorReporter.warning(decl->location(), "Naming function type parameters is deprecated.");
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for (auto const& decl: _node.returnParameterTypeList()->parameters())
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if (!decl->name().empty())
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m_errorReporter.warning(decl->location(), "Naming function type return parameters is deprecated.");
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return true;
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}
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bool SyntaxChecker::visit(VariableDeclaration const& _declaration)
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{
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bool const v050 = m_sourceUnit->annotation().experimentalFeatures.count(ExperimentalFeature::V050);
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if (!_declaration.typeName())
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{
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if (v050)
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m_errorReporter.syntaxError(_declaration.location(), "Use of the \"var\" keyword is deprecated.");
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else
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m_errorReporter.warning(_declaration.location(), "Use of the \"var\" keyword is deprecated.");
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}
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return true;
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}
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bool SyntaxChecker::visit(StructDefinition const& _struct)
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{
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bool const v050 = m_sourceUnit->annotation().experimentalFeatures.count(ExperimentalFeature::V050);
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if (_struct.members().empty())
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{
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if (v050)
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m_errorReporter.syntaxError(_struct.location(), "Defining empty structs is disallowed.");
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else
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m_errorReporter.warning(_struct.location(), "Defining empty structs is deprecated.");
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}
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return true;
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}
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