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/*
This file is part of solidity.
solidity 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.
solidity 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 solidity. If not, see <http://www.gnu.org/licenses/>.
*/
#include <libsolidity/analysis/SyntaxChecker.h>
#include <memory>
#include <libsolidity/ast/AST.h>
#include <libsolidity/analysis/SemVerHandler.h>
#include <libsolidity/interface/Version.h>
using namespace std;
using namespace dev;
using namespace dev::solidity;
bool SyntaxChecker::checkSyntax(SourceUnit const& _sourceUnit)
{
_sourceUnit.accept(*this);
return Error::containsOnlyWarnings(m_errors);
}
void SyntaxChecker::syntaxError(SourceLocation const& _location, std::string const& _description)
{
auto err = make_shared<Error>(Error::Type::SyntaxError);
*err <<
errinfo_sourceLocation(_location) <<
errinfo_comment(_description);
m_errors.push_back(err);
}
bool SyntaxChecker::visit(SourceUnit const&)
{
m_versionPragmaFound = false;
return true;
}
void SyntaxChecker::endVisit(SourceUnit const& _sourceUnit)
{
if (!m_versionPragmaFound)
{
string errorString("Source file does not specify required compiler version!");
SemVerVersion recommendedVersion{string(VersionString)};
if (!recommendedVersion.isPrerelease())
errorString +=
"Consider adding \"pragma solidity ^" +
to_string(recommendedVersion.major()) +
string(".") +
to_string(recommendedVersion.minor()) +
string(".") +
to_string(recommendedVersion.patch());
string(";\"");
auto err = make_shared<Error>(Error::Type::Warning);
*err <<
errinfo_sourceLocation(_sourceUnit.location()) <<
errinfo_comment(errorString);
m_errors.push_back(err);
}
}
bool SyntaxChecker::visit(PragmaDirective const& _pragma)
{
solAssert(!_pragma.tokens().empty(), "");
solAssert(_pragma.tokens().size() == _pragma.literals().size(), "");
if (_pragma.tokens()[0] != Token::Identifier || _pragma.literals()[0] != "solidity")
syntaxError(_pragma.location(), "Unknown pragma \"" + _pragma.literals()[0] + "\"");
else
{
vector<Token::Value> tokens(_pragma.tokens().begin() + 1, _pragma.tokens().end());
vector<string> literals(_pragma.literals().begin() + 1, _pragma.literals().end());
SemVerMatchExpressionParser parser(tokens, literals);
auto matchExpression = parser.parse();
SemVerVersion currentVersion{string(VersionString)};
if (!matchExpression.matches(currentVersion))
syntaxError(
_pragma.location(),
"Source file requires different compiler version (current compiler is " +
string(VersionString) + " - note that nightly builds are considered to be "
"strictly less than the released version"
);
m_versionPragmaFound = true;
}
return true;
}
bool SyntaxChecker::visit(ModifierDefinition const&)
{
m_placeholderFound = false;
return true;
}
void SyntaxChecker::endVisit(ModifierDefinition const& _modifier)
{
if (!m_placeholderFound)
syntaxError(_modifier.body().location(), "Modifier body does not contain '_'.");
m_placeholderFound = false;
}
bool SyntaxChecker::visit(WhileStatement const&)
{
m_inLoopDepth++;
return true;
}
void SyntaxChecker::endVisit(WhileStatement const& )
{
m_inLoopDepth--;
}
bool SyntaxChecker::visit(ForStatement const&)
{
m_inLoopDepth++;
return true;
}
void SyntaxChecker::endVisit(ForStatement const&)
{
m_inLoopDepth--;
}
bool SyntaxChecker::visit(Continue const& _continueStatement)
{
if (m_inLoopDepth <= 0)
// we're not in a for/while loop, report syntax error
syntaxError(_continueStatement.location(), "\"continue\" has to be in a \"for\" or \"while\" loop.");
return true;
}
bool SyntaxChecker::visit(Break const& _breakStatement)
{
if (m_inLoopDepth <= 0)
// we're not in a for/while loop, report syntax error
syntaxError(_breakStatement.location(), "\"break\" has to be in a \"for\" or \"while\" loop.");
return true;
}
bool SyntaxChecker::visit(PlaceholderStatement const&)
{
m_placeholderFound = true;
return true;
}
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