diff options
Diffstat (limited to 'libsolidity')
| -rw-r--r-- | libsolidity/analysis/SyntaxChecker.cpp | 21 | ||||
| -rw-r--r-- | libsolidity/analysis/SyntaxChecker.h | 6 |
2 files changed, 25 insertions, 2 deletions
diff --git a/libsolidity/analysis/SyntaxChecker.cpp b/libsolidity/analysis/SyntaxChecker.cpp index ac4fa72b..0bc20f2e 100644 --- a/libsolidity/analysis/SyntaxChecker.cpp +++ b/libsolidity/analysis/SyntaxChecker.cpp @@ -138,9 +138,25 @@ void SyntaxChecker::endVisit(ModifierDefinition const& _modifier) m_placeholderFound = false; } -bool SyntaxChecker::visit(WhileStatement const&) +void SyntaxChecker::checkSingleStatementVariableDeclaration(ASTNode const& _statement) +{ + auto varDecl = dynamic_cast<VariableDeclarationStatement const*>(&_statement); + if (varDecl) + m_errorReporter.syntaxError(_statement.location(), "Variable declarations can only be used inside blocks."); +} + +bool SyntaxChecker::visit(IfStatement const& _ifStatement) +{ + checkSingleStatementVariableDeclaration(_ifStatement.trueStatement()); + if (Statement const* _statement = _ifStatement.falseStatement()) + checkSingleStatementVariableDeclaration(*_statement); + return true; +} + +bool SyntaxChecker::visit(WhileStatement const& _whileStatement) { m_inLoopDepth++; + checkSingleStatementVariableDeclaration(_whileStatement.body()); return true; } @@ -149,9 +165,10 @@ void SyntaxChecker::endVisit(WhileStatement const&) m_inLoopDepth--; } -bool SyntaxChecker::visit(ForStatement const&) +bool SyntaxChecker::visit(ForStatement const& _forStatement) { m_inLoopDepth++; + checkSingleStatementVariableDeclaration(_forStatement.body()); return true; } diff --git a/libsolidity/analysis/SyntaxChecker.h b/libsolidity/analysis/SyntaxChecker.h index 897df676..f5716bf9 100644 --- a/libsolidity/analysis/SyntaxChecker.h +++ b/libsolidity/analysis/SyntaxChecker.h @@ -52,6 +52,12 @@ private: virtual bool visit(ModifierDefinition const& _modifier) override; virtual void endVisit(ModifierDefinition const& _modifier) override; + /// Reports an error if _statement is a VariableDeclarationStatement. + /// Used by if/while/for to check for single statement variable declarations + /// without a block. + void checkSingleStatementVariableDeclaration(ASTNode const& _statement); + + virtual bool visit(IfStatement const& _ifStatement) override; virtual bool visit(WhileStatement const& _whileStatement) override; virtual void endVisit(WhileStatement const& _whileStatement) override; virtual bool visit(ForStatement const& _forStatement) override; |