qt-creator/tests/auto/cplusplus/ast/tst_ast.cpp

#include <QtTest>
#include <QtDebug>

#include <Control.h>
#include <Literals.h>
#include <Parser.h>
#include <AST.h>

using namespace CPlusPlus;

class tst_AST: public QObject
{
    Q_OBJECT

    Control control;

public:

    TranslationUnit *parse(const QByteArray &source,
                           TranslationUnit::ParseMode mode,
                           bool blockErrors = false)
    {
        StringLiteral *fileId = control.findOrInsertStringLiteral("<stdin>");
        TranslationUnit *unit = new TranslationUnit(&control, fileId);
        unit->setObjCEnabled(true);
        unit->setSource(source.constData(), source.length());
        unit->blockErrors(blockErrors);
        unit->parse(mode);
        return unit;
    }

    TranslationUnit *parseDeclaration(const QByteArray &source, bool blockErrors = false)
    { return parse(source, TranslationUnit::ParseDeclaration, blockErrors); }

    TranslationUnit *parseExpression(const QByteArray &source)
    { return parse(source, TranslationUnit::ParseExpression); }

    TranslationUnit *parseStatement(const QByteArray &source)
    { return parse(source, TranslationUnit::ParseStatement); }

private slots:
    // declarations
    void gcc_attributes_1();

    // expressions
    void simple_name_1();
    void template_id_1();
    void new_expression_1();
    void new_expression_2();
    void condition_1();
    void init_1();

    // statements
    void if_statement_1();
    void if_statement_2();
    void if_statement_3();
    void if_else_statement();
    void while_statement();
    void while_condition_statement();
    void for_statement();
    void cpp_initializer_or_function_declaration();
    void simple_declaration_1();
    void function_call_1();
    void function_call_2();
    void function_call_3();
    void function_call_4();
    void nested_deref_expression();
    void assignment_1();
    void assignment_2();

    // objc++
    void objc_attributes_followed_by_at_keyword();
    void objc_protocol_forward_declaration_1();
    void objc_protocol_definition_1();

    // expressions with (square) brackets
    void normal_array_access();
    void array_access_with_nested_expression();
    void objc_msg_send_expression();
    void objc_msg_send_expression_without_selector();
};

void tst_AST::gcc_attributes_1()
{
    QSharedPointer<TranslationUnit> unit(parseDeclaration("\n"
"static inline void *__attribute__((__always_inline__)) _mm_malloc(size_t size, size_t align);"
    ));
}

void tst_AST::simple_declaration_1()
{
    QSharedPointer<TranslationUnit> unit(parseStatement("\n"
"a * b = 10;"
    ));

    AST *ast = unit->ast();
    QVERIFY(ast);

    DeclarationStatementAST *declStmt = ast->asDeclarationStatement();
    QVERIFY(declStmt);
}

void tst_AST::simple_name_1()
{
    QSharedPointer<TranslationUnit> unit(parseExpression("a"));
    AST *ast = unit->ast();

    QVERIFY(ast != 0);
    QVERIFY(ast->asSimpleName() != 0);
    QCOMPARE(ast->asSimpleName()->identifier_token, 1U);
}

void tst_AST::template_id_1()
{
    QSharedPointer<TranslationUnit> unit(parseExpression("list<10>"));
    AST *ast = unit->ast();

    QVERIFY(ast != 0);
    QVERIFY(ast->asTemplateId() != 0);
    QCOMPARE(ast->asTemplateId()->identifier_token, 1U);
    QCOMPARE(ast->asTemplateId()->less_token, 2U);
    QVERIFY(ast->asTemplateId()->template_arguments != 0);
    QVERIFY(ast->asTemplateId()->template_arguments->template_argument != 0);
    QVERIFY(ast->asTemplateId()->template_arguments->template_argument->asNumericLiteral() != 0);
    QCOMPARE(ast->asTemplateId()->template_arguments->template_argument->asNumericLiteral()->literal_token, 3U);
    QVERIFY(ast->asTemplateId()->template_arguments->next == 0);
    QCOMPARE(ast->asTemplateId()->greater_token, 4U);
}

void tst_AST::new_expression_1()
{
    QSharedPointer<TranslationUnit> unit(parseExpression("\n"
"new char"
    ));

    AST *ast = unit->ast();
    QVERIFY(ast != 0);

    NewExpressionAST *expr = ast->asNewExpression();
    QVERIFY(expr != 0);

    QCOMPARE(expr->scope_token, 0U);
    QCOMPARE(expr->new_token, 1U);
    QVERIFY(expr->new_placement == 0);
    QCOMPARE(expr->lparen_token, 0U);
    QVERIFY(expr->type_id == 0);
    QCOMPARE(expr->rparen_token, 0U);
    QVERIFY(expr->new_type_id != 0);
    QVERIFY(expr->new_initializer == 0);

    QVERIFY(expr->new_type_id->type_specifier != 0);
    QVERIFY(expr->new_type_id->ptr_operators == 0);
    QVERIFY(expr->new_type_id->new_array_declarators == 0);
}

void tst_AST::new_expression_2()
{
    QSharedPointer<TranslationUnit> unit(parseStatement("\n"
"::new(__p) _Tp(__val);"
    ));

    AST *ast = unit->ast();
    QVERIFY(ast != 0);

    ExpressionStatementAST *stmt = ast->asExpressionStatement();
    QVERIFY(stmt != 0);
    QVERIFY(stmt->expression != 0);
    QVERIFY(stmt->semicolon_token != 0);

    NewExpressionAST *expr = stmt->expression->asNewExpression();
    QVERIFY(expr != 0);

    QCOMPARE(expr->scope_token, 1U);
    QCOMPARE(expr->new_token, 2U);
    QVERIFY(expr->new_placement != 0);
    QCOMPARE(expr->lparen_token, 0U);
    QVERIFY(expr->type_id == 0);
    QCOMPARE(expr->rparen_token, 0U);
    QVERIFY(expr->new_type_id != 0);
    QVERIFY(expr->new_initializer != 0);
}

void tst_AST::condition_1()
{
    QSharedPointer<TranslationUnit> unit(parseExpression("\n"
"(x < 0 && y > (int) a)"
    ));

    AST *ast = unit->ast();
    QVERIFY(ast != 0);
}

void tst_AST::init_1()
{
    QSharedPointer<TranslationUnit> unit(parseDeclaration("\n"
                                                          "x y[] = { X<10>, y };"
    ));

    AST *ast = unit->ast();
    QVERIFY(ast != 0);
}

void tst_AST::function_call_1()
{
    QSharedPointer<TranslationUnit> unit(parseStatement("retranslateUi(blah);"));
    AST *ast = unit->ast();
    QVERIFY(ast != 0);
    QVERIFY(ast->asExpressionStatement());
}

void tst_AST::function_call_2()
{
    QSharedPointer<TranslationUnit> unit(parseStatement("retranslateUi(10);"));
    AST *ast = unit->ast();
    QVERIFY(ast != 0);
    QVERIFY(ast->asExpressionStatement());
}

void tst_AST::function_call_3()
{
    QSharedPointer<TranslationUnit> unit(parseStatement("advance();"));
    AST *ast = unit->ast();
    QVERIFY(ast != 0);
    QVERIFY(ast->asExpressionStatement());
}

void tst_AST::function_call_4()
{
    QSharedPointer<TranslationUnit> unit(parseStatement("checkPropertyAttribute(attrAst, propAttrs, ReadWrite);"));
    AST *ast = unit->ast();
    QVERIFY(ast != 0);
    QVERIFY(ast->asExpressionStatement());
}

void tst_AST::nested_deref_expression()
{
    QSharedPointer<TranslationUnit> unit(parseStatement("(*blah);"));
    AST *ast = unit->ast();
    QVERIFY(ast != 0);
    QVERIFY(ast->asExpressionStatement());
}

void tst_AST::assignment_1()
{
    QSharedPointer<TranslationUnit> unit(parseStatement("a(x) = 3;"));
    AST *ast = unit->ast();
    QVERIFY(ast != 0);
    QVERIFY(ast->asExpressionStatement());
}

void tst_AST::assignment_2()
{
    QSharedPointer<TranslationUnit> unit(parseStatement("(*blah) = 10;"));
    AST *ast = unit->ast();
    QVERIFY(ast != 0);
    QVERIFY(ast->asExpressionStatement());
}

void tst_AST::if_statement_1()
{
    QSharedPointer<TranslationUnit> unit(parseStatement("if (a) b;"));

    AST *ast = unit->ast();
    QVERIFY(ast != 0);

    IfStatementAST *stmt = ast->asIfStatement();
    QVERIFY(stmt != 0);
    QCOMPARE(stmt->if_token, 1U);
    QCOMPARE(stmt->lparen_token, 2U);
    QVERIFY(stmt->condition != 0);
    QCOMPARE(stmt->rparen_token, 4U);
    QVERIFY(stmt->statement != 0);
    QCOMPARE(stmt->else_token, 0U);
    QVERIFY(stmt->else_statement == 0);

    // check the `then' statement1
    ExpressionStatementAST *then_stmt = stmt->statement->asExpressionStatement();
    QVERIFY(then_stmt != 0);
    QVERIFY(then_stmt->expression != 0);
    QCOMPARE(then_stmt->semicolon_token, 6U);

    SimpleNameAST *id_expr = then_stmt->expression->asSimpleName();
    QVERIFY(id_expr != 0);
    QCOMPARE(id_expr->identifier_token, 5U);
}

void tst_AST::if_statement_2()
{
    QSharedPointer<TranslationUnit> unit(parseStatement("if (x<0 && y>a);"));

    AST *ast = unit->ast();
    QVERIFY(ast != 0);

    IfStatementAST *stmt = ast->asIfStatement();
    QVERIFY(stmt != 0);

    QVERIFY(stmt->condition);
    QVERIFY(stmt->condition->asBinaryExpression());
    QCOMPARE(unit->tokenKind(stmt->condition->asBinaryExpression()->binary_op_token), int(T_AMPER_AMPER));
}

void tst_AST::if_statement_3()
{
    QSharedPointer<TranslationUnit> unit(parseStatement("if (x<0 && x<0 && x<0 && x<0 && x<0 && x<0 && x<0);"));

    AST *ast = unit->ast();
    QVERIFY(ast != 0);

    IfStatementAST *stmt = ast->asIfStatement();
    QVERIFY(stmt != 0);

    QVERIFY(stmt->condition);
}

void tst_AST::if_else_statement()
{
    QSharedPointer<TranslationUnit> unit(parseStatement("if (a) b; else c;"));

    AST *ast = unit->ast();
    QVERIFY(ast != 0);

    IfStatementAST *stmt = ast->asIfStatement();
    QVERIFY(stmt != 0);
    QCOMPARE(stmt->if_token, 1U);
    QCOMPARE(stmt->lparen_token, 2U);
    QVERIFY(stmt->condition != 0);
    QCOMPARE(stmt->rparen_token, 4U);
    QVERIFY(stmt->statement != 0);
    QCOMPARE(stmt->else_token, 7U);
    QVERIFY(stmt->else_statement != 0);

    // check the `then' statement
    ExpressionStatementAST *then_stmt = stmt->statement->asExpressionStatement();
    QVERIFY(then_stmt != 0);
    QVERIFY(then_stmt->expression != 0);
    QCOMPARE(then_stmt->semicolon_token, 6U);

    SimpleNameAST *a_id_expr = then_stmt->expression->asSimpleName();
    QVERIFY(a_id_expr != 0);
    QCOMPARE(a_id_expr->identifier_token, 5U);

    // check the `then' statement
    ExpressionStatementAST *else_stmt = stmt->else_statement->asExpressionStatement();
    QVERIFY(else_stmt != 0);
    QVERIFY(else_stmt->expression != 0);
    QCOMPARE(else_stmt->semicolon_token, 9U);

    SimpleNameAST *b_id_expr = else_stmt->expression->asSimpleName();
    QVERIFY(b_id_expr != 0);
    QCOMPARE(b_id_expr->identifier_token, 8U);
}

void tst_AST::while_statement()
{
    QSharedPointer<TranslationUnit> unit(parseStatement("while (a) { }"));

    AST *ast = unit->ast();
    QVERIFY(ast != 0);

    WhileStatementAST *stmt = ast->asWhileStatement();
    QVERIFY(stmt != 0);
    QCOMPARE(stmt->while_token, 1U);
    QCOMPARE(stmt->lparen_token, 2U);
    QVERIFY(stmt->condition != 0);
    QCOMPARE(stmt->rparen_token, 4U);
    QVERIFY(stmt->statement != 0);

    // check condition
    QVERIFY(stmt->condition->asSimpleName() != 0);
    QCOMPARE(stmt->condition->asSimpleName()->identifier_token, 3U);

    // check the `body' statement
    CompoundStatementAST *body_stmt = stmt->statement->asCompoundStatement();
    QVERIFY(body_stmt != 0);
    QCOMPARE(body_stmt->lbrace_token, 5U);
    QVERIFY(body_stmt->statements == 0);
    QCOMPARE(body_stmt->rbrace_token, 6U);
}

void tst_AST::while_condition_statement()
{
    QSharedPointer<TranslationUnit> unit(parseStatement("while (int a = foo) { }"));

    AST *ast = unit->ast();
    QVERIFY(ast != 0);

    WhileStatementAST *stmt = ast->asWhileStatement();
    QVERIFY(stmt != 0);
    QCOMPARE(stmt->while_token, 1U);
    QCOMPARE(stmt->lparen_token, 2U);
    QVERIFY(stmt->condition != 0);
    QCOMPARE(stmt->rparen_token, 7U);
    QVERIFY(stmt->statement != 0);

    // check condition
    ConditionAST *condition = stmt->condition->asCondition();
    QVERIFY(condition != 0);
    QVERIFY(condition->type_specifier != 0);
    QVERIFY(condition->type_specifier->asSimpleSpecifier() != 0);
    QCOMPARE(condition->type_specifier->asSimpleSpecifier()->specifier_token, 3U);
    QVERIFY(condition->type_specifier->next == 0);
    QVERIFY(condition->declarator != 0);
    QVERIFY(condition->declarator->core_declarator != 0);
    QVERIFY(condition->declarator->core_declarator->asDeclaratorId() != 0);
    QVERIFY(condition->declarator->core_declarator->asDeclaratorId()->name != 0);
    QVERIFY(condition->declarator->core_declarator->asDeclaratorId()->name->asSimpleName() != 0);
    QCOMPARE(condition->declarator->core_declarator->asDeclaratorId()->name->asSimpleName()->identifier_token, 4U);
    QVERIFY(condition->declarator->postfix_declarators == 0);
    QVERIFY(condition->declarator->initializer != 0);
    QVERIFY(condition->declarator->initializer->asSimpleName() != 0);
    QCOMPARE(condition->declarator->initializer->asSimpleName()->identifier_token, 6U);

    // check the `body' statement
    CompoundStatementAST *body_stmt = stmt->statement->asCompoundStatement();
    QVERIFY(body_stmt != 0);
    QCOMPARE(body_stmt->lbrace_token, 8U);
    QVERIFY(body_stmt->statements == 0);
    QCOMPARE(body_stmt->rbrace_token, 9U);
}

void tst_AST::for_statement()
{
    QSharedPointer<TranslationUnit> unit(parseStatement("for (;;) {}"));
    AST *ast = unit->ast();
    QVERIFY(ast != 0);

    ForStatementAST *stmt = ast->asForStatement();
    QVERIFY(stmt != 0);
    QCOMPARE(stmt->for_token, 1U);
    QCOMPARE(stmt->lparen_token, 2U);
    QVERIFY(stmt->initializer != 0);
    QVERIFY(stmt->initializer->asExpressionStatement() != 0);
    QCOMPARE(stmt->initializer->asExpressionStatement()->semicolon_token, 3U);
    QVERIFY(stmt->condition == 0);
    QCOMPARE(stmt->semicolon_token, 4U);
    QVERIFY(stmt->expression == 0);
    QCOMPARE(stmt->rparen_token, 5U);
    QVERIFY(stmt->statement != 0);
    QVERIFY(stmt->statement->asCompoundStatement() != 0);
    QCOMPARE(stmt->statement->asCompoundStatement()->lbrace_token, 6U);
    QVERIFY(stmt->statement->asCompoundStatement()->statements == 0);
    QCOMPARE(stmt->statement->asCompoundStatement()->rbrace_token, 7U);
}

void tst_AST::cpp_initializer_or_function_declaration()
{
    QSharedPointer<TranslationUnit> unit(parseStatement("QFileInfo fileInfo(foo);"));
    AST *ast = unit->ast();
    QVERIFY(ast != 0);

    DeclarationStatementAST *stmt = ast->asDeclarationStatement();
    QVERIFY(stmt != 0);

    QVERIFY(stmt->declaration != 0);

    SimpleDeclarationAST *simple_decl = stmt->declaration->asSimpleDeclaration();
    QVERIFY(simple_decl != 0);

    QVERIFY(simple_decl->decl_specifier_seq != 0);
    QVERIFY(simple_decl->decl_specifier_seq->next == 0);
    QVERIFY(simple_decl->declarators != 0);
    QVERIFY(simple_decl->declarators->next == 0);
    QCOMPARE(simple_decl->semicolon_token, 6U);

    NamedTypeSpecifierAST *named_ty = simple_decl->decl_specifier_seq->asNamedTypeSpecifier();
    QVERIFY(named_ty != 0);
    QVERIFY(named_ty->name != 0);

    SimpleNameAST *simple_named_ty = named_ty->name->asSimpleName();
    QVERIFY(simple_named_ty != 0);
    QCOMPARE(simple_named_ty->identifier_token, 1U);

    DeclaratorAST *declarator = simple_decl->declarators->declarator;
    QVERIFY(declarator != 0);
    QVERIFY(declarator->core_declarator != 0);
    QVERIFY(declarator->postfix_declarators != 0);
    QVERIFY(declarator->postfix_declarators->next == 0);
    QVERIFY(declarator->initializer == 0);

    DeclaratorIdAST *decl_id = declarator->core_declarator->asDeclaratorId();
    QVERIFY(decl_id != 0);
    QVERIFY(decl_id->name != 0);
    QVERIFY(decl_id->name->asSimpleName() != 0);
    QCOMPARE(decl_id->name->asSimpleName()->identifier_token, 2U);

    FunctionDeclaratorAST *fun_declarator = declarator->postfix_declarators->asFunctionDeclarator();
    QVERIFY(fun_declarator != 0);
    QCOMPARE(fun_declarator->lparen_token, 3U);
    QVERIFY(fun_declarator->parameters != 0);
    QCOMPARE(fun_declarator->rparen_token, 5U);

    // check the formal arguments
    ParameterDeclarationClauseAST *param_clause = fun_declarator->parameters;
    QVERIFY(param_clause->parameter_declarations != 0);
    QVERIFY(param_clause->parameter_declarations->next == 0);
    QCOMPARE(param_clause->dot_dot_dot_token, 0U);

    // check the parameter
    DeclarationListAST *declarations = param_clause->parameter_declarations->asDeclarationList();
    QVERIFY(declarations);
    QVERIFY(declarations->declaration);
    QVERIFY(! declarations->next);

    ParameterDeclarationAST *param = declarations->declaration->asParameterDeclaration();
    QVERIFY(param);
    QVERIFY(param->type_specifier != 0);
    QVERIFY(param->type_specifier->next == 0);
    QVERIFY(param->type_specifier->asNamedTypeSpecifier() != 0);
    QVERIFY(param->type_specifier->asNamedTypeSpecifier()->name != 0);
    QVERIFY(param->type_specifier->asNamedTypeSpecifier()->name->asSimpleName() != 0);
    QCOMPARE(param->type_specifier->asNamedTypeSpecifier()->name->asSimpleName()->identifier_token, 4U);
}

void tst_AST::objc_attributes_followed_by_at_keyword()
{
    QSharedPointer<TranslationUnit> unit(parseDeclaration("\n"
"__attribute__((deprecated)) @interface foo <bar>\n"
"{\n"
" int a, b;\n"
"}\n"
"+ (id) init;\n"
"- (id) init:(int)a foo:(int)b, c;\n"
"@end\n"
    ));
    AST *ast = unit->ast();
}

void tst_AST::objc_protocol_forward_declaration_1()
{
    QSharedPointer<TranslationUnit> unit(parseDeclaration("\n@protocol foo;"));
    AST *ast = unit->ast();
}

void tst_AST::objc_protocol_definition_1()
{
    QSharedPointer<TranslationUnit> unit(parseDeclaration("\n@protocol foo <ciao, bar> @end"));
    AST *ast = unit->ast();
}

void tst_AST::normal_array_access()
{
    QSharedPointer<TranslationUnit> unit(parseDeclaration("\n"
                                                          "int f() {\n"
                                                          "  int a[10];\n"
                                                          "  int b = 1;\n"
                                                          "  return a[b];\n"
                                                          "}"
                                                          ));
    AST *ast = unit->ast();
    QVERIFY(ast);

    FunctionDefinitionAST *func = ast->asFunctionDefinition();
    QVERIFY(func);

    StatementListAST *bodyStatements = func->function_body->asCompoundStatement()->statements;
    QVERIFY(bodyStatements);
    QVERIFY(bodyStatements->next);
    QVERIFY(bodyStatements->next->next);
    QVERIFY(bodyStatements->next->next->statement);
    ExpressionAST *expr = bodyStatements->next->next->statement->asReturnStatement()->expression;
    QVERIFY(expr);

    PostfixExpressionAST *postfixExpr = expr->asPostfixExpression();
    QVERIFY(postfixExpr);

    {
        ExpressionAST *lhs = postfixExpr->base_expression;
        QVERIFY(lhs);
        SimpleNameAST *a = lhs->asSimpleName();
        QVERIFY(a);
        QCOMPARE(QLatin1String(unit->identifier(a->identifier_token)->chars()), QLatin1String("a"));
    }

    {
        QVERIFY(postfixExpr->postfix_expressions && !postfixExpr->postfix_expressions->next);
        ArrayAccessAST *rhs = postfixExpr->postfix_expressions->asArrayAccess();
        QVERIFY(rhs && rhs->expression);
        SimpleNameAST *b = rhs->expression->asSimpleName();
        QVERIFY(b);
        QCOMPARE(QLatin1String(unit->identifier(b->identifier_token)->chars()), QLatin1String("b"));
    }
}

void tst_AST::array_access_with_nested_expression()
{
    QSharedPointer<TranslationUnit> unit(parseDeclaration("\n"
                                                          "int f() {\n"
                                                          "  int a[15];\n"
                                                          "  int b = 1;\n"
                                                          "  return (a)[b];\n"
                                                          "}"
                                                          ));
    AST *ast = unit->ast();
    QVERIFY(ast);

    FunctionDefinitionAST *func = ast->asFunctionDefinition();
    QVERIFY(func);

    StatementListAST *bodyStatements = func->function_body->asCompoundStatement()->statements;
    QVERIFY(bodyStatements && bodyStatements->next && bodyStatements->next->next && bodyStatements->next->next->statement);
    ExpressionAST *expr = bodyStatements->next->next->statement->asReturnStatement()->expression;
    QVERIFY(expr);

    CastExpressionAST *castExpr = expr->asCastExpression();
    QVERIFY(!castExpr);

    PostfixExpressionAST *postfixExpr = expr->asPostfixExpression();
    QVERIFY(postfixExpr);

    {
        ExpressionAST *lhs = postfixExpr->base_expression;
        QVERIFY(lhs);
        NestedExpressionAST *nested_a = lhs->asNestedExpression();
        QVERIFY(nested_a && nested_a->expression);
        SimpleNameAST *a = nested_a->expression->asSimpleName();
        QVERIFY(a);
        QCOMPARE(QLatin1String(unit->identifier(a->identifier_token)->chars()), QLatin1String("a"));
    }

    {
        QVERIFY(postfixExpr->postfix_expressions && !postfixExpr->postfix_expressions->next);
        ArrayAccessAST *rhs = postfixExpr->postfix_expressions->asArrayAccess();
        QVERIFY(rhs && rhs->expression);
        SimpleNameAST *b = rhs->expression->asSimpleName();
        QVERIFY(b);
        QCOMPARE(QLatin1String(unit->identifier(b->identifier_token)->chars()), QLatin1String("b"));
    }
}

void tst_AST::objc_msg_send_expression()
{
    QSharedPointer<TranslationUnit> unit(parseDeclaration("\n"
                                                          "int f() {\n"
                                                          "  NSObject *obj = [[[NSObject alloc] init] autorelease];\n"
                                                          "  return [obj description];\n"
                                                          "}"
                                                          ));
    AST *ast = unit->ast();
    QVERIFY(ast);

    FunctionDefinitionAST *func = ast->asFunctionDefinition();
    QVERIFY(func);

    StatementListAST *bodyStatements = func->function_body->asCompoundStatement()->statements;
    QVERIFY(bodyStatements && bodyStatements->next && !bodyStatements->next->next && bodyStatements->next->statement);

    {// check the NSObject declaration
        DeclarationStatementAST *firstStatement = bodyStatements->statement->asDeclarationStatement();
        QVERIFY(firstStatement);
        DeclarationAST *objDecl = firstStatement->declaration;
        QVERIFY(objDecl);
        SimpleDeclarationAST *simpleDecl = objDecl->asSimpleDeclaration();
        QVERIFY(simpleDecl);

        {// check the type (NSObject)
            QVERIFY(simpleDecl->decl_specifier_seq && !simpleDecl->decl_specifier_seq->next);
            NamedTypeSpecifierAST *namedType = simpleDecl->decl_specifier_seq->asNamedTypeSpecifier();
            QVERIFY(namedType && namedType->name);
            SimpleNameAST *typeName = namedType->name->asSimpleName();
            QVERIFY(typeName);
            QCOMPARE(QLatin1String(unit->identifier(typeName->identifier_token)->chars()), QLatin1String("NSObject"));
        }

        {// check the assignment
            QVERIFY(simpleDecl->declarators && !simpleDecl->declarators->next);
            DeclaratorAST *declarator = simpleDecl->declarators->declarator;
            QVERIFY(declarator);
            QVERIFY(!declarator->attributes);

            QVERIFY(declarator->ptr_operators && !declarator->ptr_operators->next && declarator->ptr_operators->asPointer() && !declarator->ptr_operators->asPointer()->cv_qualifier_seq);

            QVERIFY(declarator->core_declarator && declarator->core_declarator->asDeclaratorId());
            NameAST *objNameId = declarator->core_declarator->asDeclaratorId()->name;
            QVERIFY(objNameId && objNameId->asSimpleName());
            QCOMPARE(QLatin1String(unit->identifier(objNameId->asSimpleName()->identifier_token)->chars()), QLatin1String("obj"));

            QVERIFY(!declarator->postfix_declarators);
            QVERIFY(!declarator->post_attributes);
            ExpressionAST *initializer = declarator->initializer;
            QVERIFY(initializer);

            ObjCMessageExpressionAST *expr1 = initializer->asObjCMessageExpression();
            QVERIFY(expr1 && expr1->receiver_expression && expr1->selector && !expr1->argument_list);

            ObjCMessageExpressionAST *expr2 = expr1->receiver_expression->asObjCMessageExpression();
            QVERIFY(expr2 && expr2->receiver_expression && expr2->selector && !expr2->argument_list);

            ObjCMessageExpressionAST *expr3 = expr2->receiver_expression->asObjCMessageExpression();
            QVERIFY(expr3 && expr3->receiver_expression && expr3->selector && !expr3->argument_list);
        }
    }

    {// check the return statement
        ExpressionAST *expr = bodyStatements->next->statement->asReturnStatement()->expression;
        QVERIFY(expr);

        ObjCMessageExpressionAST *msgExpr = expr->asObjCMessageExpression();
        QVERIFY(msgExpr);

        QVERIFY(msgExpr->receiver_expression);
        SimpleNameAST *receiver = msgExpr->receiver_expression->asSimpleName();
        QVERIFY(receiver);
        QCOMPARE(QLatin1String(unit->identifier(receiver->identifier_token)->chars()), QLatin1String("obj"));

        QVERIFY(msgExpr->argument_list == 0);

        QVERIFY(msgExpr->selector);
        ObjCSelectorWithoutArgumentsAST *sel = msgExpr->selector->asObjCSelectorWithoutArguments();
        QVERIFY(sel);
        QCOMPARE(QLatin1String(unit->identifier(sel->name_token)->chars()), QLatin1String("description"));
    }
}

void tst_AST::objc_msg_send_expression_without_selector()
{
    // This test is to verify that no ObjCMessageExpressionAST element is created as the expression for the return statement.
    QSharedPointer<TranslationUnit> unit(parseDeclaration("\n"
                                                          "int f() {\n"
                                                          "  NSObject *obj = [[[NSObject alloc] init] autorelease];\n"
                                                          "  return [obj];\n"
                                                          "}",
                                                          true));
    AST *ast = unit->ast();
    QVERIFY(ast);

    FunctionDefinitionAST *func = ast->asFunctionDefinition();
    QVERIFY(func);

    StatementListAST *bodyStatements = func->function_body->asCompoundStatement()->statements;
    QVERIFY(bodyStatements && bodyStatements->next);
    QVERIFY(bodyStatements->next->statement);
    QVERIFY(bodyStatements->next->statement->asReturnStatement());
    QVERIFY(!bodyStatements->next->statement->asReturnStatement()->expression);
}

QTEST_APPLESS_MAIN(tst_AST)
#include "tst_ast.moc"