compilerplugins/clang/test/reducevarscope.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 <rtl/ustring.hxx>
  11
  12 #pragma clang diagnostic ignored "-Wunknown-warning-option" // for Clang < 13
  13 #pragma clang diagnostic ignored "-Wunused-but-set-variable"
  14
  15 void test1()
  16 {
  17     int i = 2; // expected-error {{can reduce scope of var [loplugin:reducevarscope]}}
  18     {
  19         i = 3; // expected-note {{used here [loplugin:reducevarscope]}}
  20     }
  21     int j = 2; // expected-error {{can reduce scope of var [loplugin:reducevarscope]}}
  22     {
  23         j = 3; // expected-note {{used here [loplugin:reducevarscope]}}
  24         {
  25             j = 4; // expected-note {{used here [loplugin:reducevarscope]}}
  26         }
  27     }
  28 }
  29
  30 // negative test - seen inside a loop
  31 void test2()
  32 {
  33     int i = 2;
  34     for (int j = 1; j < 10; ++j)
  35     {
  36         i = 3;
  37     }
  38 }
  39
  40 // negative test - initial assignment from non-constant
  41 void test3()
  42 {
  43     int j = 1;
  44     int i = j;
  45     {
  46         i = 3;
  47     }
  48 }
  49
  50 // negative test
  51 void test4()
  52 {
  53     int i = 2;
  54     {
  55         i = 3;
  56     }
  57     i = 4;
  58 }
  59
  60 // negative test
  61 void test5()
  62 {
  63     int i = 2;
  64     i = 3;
  65 }
  66
  67 // negative test - seen in 2 child blocks
  68 void test6()
  69 {
  70     int i;
  71     {
  72         i = 3;
  73     }
  74     {
  75         i = 3;
  76     }
  77 }
  78
  79 // TODO negative test - storing pointer to OUString data
  80 // void test7()
  81 // {
  82 // OUString s;
  83 // const sal_Unicode* p = nullptr;
  84 // {
  85 // p = s.getStr();
  86 // }
  87 // auto p2 = p;
  88 // (void)p2;
  89 // }
  90
  91 // negative test - passing var into lambda
  92 void test8()
  93 {
  94     int i;
  95     auto l1 = [&]() { i = 1; };
  96     (void)l1;
  97 }
  98
  99 /* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */