compilerplugins/clang/test/getstr.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  */
   9
  10 #include <sal/config.h>
  11
  12 #include <ostream>
  13
  14 #include <rtl/strbuf.hxx>
  15 #include <rtl/string.hxx>
  16 #include <rtl/ustrbuf.hxx>
  17 #include <rtl/ustring.hxx>
  18 #include <sal/log.hxx>
  19
  20 // Determine whether std::ostream operator << for sal_Unicode* (aka char16_t*) is deleted (see
  21 // <http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2019/p1423r3.html> "char8_t backward
  22 // compatibility remediation", as implemented now by
  23 // <https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=0c5b35933e5b150df0ab487efb2f11ef5685f713>
  24 // "libstdc++: P1423R3 char8_t remediation (2/4)" for -std=c++2a; TODO: the checks here and the
  25 // relevant code in loplugin:getstr should eventually be removed once support for the deleted
  26 // operators is widespread):
  27 #if __cplusplus > 201703L                                                                          \
  28     && (defined __GLIBCXX__ || defined _MSC_VER                                                    \
  29         || (defined _LIBCPP_VERSION && _LIBCPP_VERSION >= 16000))
  30 #define HAVE_DELETED_OPERATORS true
  31 #else
  32 #define HAVE_DELETED_OPERATORS false
  33 #endif
  34
  35 using S = OString;
  36
  37 void f(std::ostream& st, OString const& s1, OStringBuffer const& s2,
  38        OUString const& s3[[maybe_unused]], OUStringBuffer const& s4[[maybe_unused]], S const& s5,
  39        OString* p1, OStringBuffer* p2, OUString* p3[[maybe_unused]],
  40        OUStringBuffer* p4[[maybe_unused]], S* p5, char const* (OString::*pf)() const)
  41 {
  42     st << s1.getStr() // expected-error-re {{directly use object of type '{{(rtl::)?}}OString' in a call of 'operator <<', instead of calling 'getStr' first [loplugin:getstr]}}
  43        << s2.getStr()
  44 #if !HAVE_DELETED_OPERATORS
  45        << s3.getStr() // expected-error-re {{suspicious use of 'getStr' on an object of type '{{(rtl::)?}}OUString'; the result is implicitly cast to a void pointer in a call of 'operator <<' [loplugin:getstr]}}
  46        << s4.getStr() // expected-error-re {{suspicious use of 'getStr' on an object of type '{{(rtl::)?}}OUStringBuffer'; the result is implicitly cast to a void pointer in a call of 'operator <<' [loplugin:getstr]}}
  47 #endif
  48        << s5.getStr() // expected-error {{directly use object of type 'S' (aka 'rtl::OString') in a call of 'operator <<', instead of calling 'getStr' first [loplugin:getstr]}}
  49        << p1->getStr() // expected-error {{directly use object of type 'rtl::OString' in a call of 'operator <<', instead of calling 'getStr' first [loplugin:getstr]}}
  50        << p2->getStr()
  51 #if !HAVE_DELETED_OPERATORS
  52        << p3->getStr() // expected-error {{suspicious use of 'getStr' on an object of type 'rtl::OUString'; the result is implicitly cast to a void pointer in a call of 'operator <<' [loplugin:getstr]}}
  53        << p4->getStr() // expected-error {{suspicious use of 'getStr' on an object of type 'rtl::OUStringBuffer'; the result is implicitly cast to a void pointer in a call of 'operator <<' [loplugin:getstr]}}
  54 #endif
  55        << p5->getStr() // expected-error {{directly use object of type 'rtl::OString' in a call of 'operator <<', instead of calling 'getStr' first [loplugin:getstr]}}
  56        << (s1.*pf)();
  57     SAL_INFO( // expected-error-re 1+ {{directly use object of type '{{(rtl::)?}}OString' in a call of 'operator <<', instead of calling 'getStr' first [loplugin:getstr]}}
  58         "test", s1.getStr());
  59 }
  60
  61 /* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */