compilerplugins/clang/test/stringview.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/strbuf.hxx>
  11 #include <rtl/string.hxx>
  12 #include <rtl/ustrbuf.hxx>
  13 #include <rtl/ustring.hxx>
  14
  15 void call_view(std::u16string_view) {}
  16 void call_view(std::string_view) {}
  17 struct ConstructWithView
  18 {
  19     ConstructWithView(std::u16string_view) {}
  20     ConstructWithView(std::string_view) {}
  21 };
  22
  23 namespace test1
  24 {
  25 void f1(std::u16string_view s1)
  26 {
  27     // no warning expected
  28     call_view(s1);
  29 }
  30 void f1(std::string_view s1)
  31 {
  32     // no warning expected
  33     call_view(s1);
  34 }
  35 void f1(OUString s1)
  36 {
  37     // expected-error@+1 {{rather than copy, pass with a view using subView() [loplugin:stringview]}}
  38     call_view(s1.copy(1, 2));
  39     // expected-error@+1 {{rather than copy, pass with a view using subView() [loplugin:stringview]}}
  40     call_view(s1.copy(1));
  41     // expected-error@+1 {{rather than copy, pass with a view using subView() [loplugin:stringview]}}
  42     ConstructWithView(s1.copy(1, 2));
  43     // expected-error@+1 {{rather than copy, pass with a view using subView() [loplugin:stringview]}}
  44     ConstructWithView(s1.copy(1));
  45 }
  46 void f1(OString s1)
  47 {
  48     // expected-error@+1 {{rather than copy, pass with a view using subView() [loplugin:stringview]}}
  49     call_view(s1.copy(1, 2));
  50     // expected-error@+1 {{rather than copy, pass with a view using subView() [loplugin:stringview]}}
  51     call_view(s1.copy(1));
  52     // expected-error@+1 {{rather than copy, pass with a view using subView() [loplugin:stringview]}}
  53     ConstructWithView(s1.copy(1, 2));
  54     // expected-error@+1 {{rather than copy, pass with a view using subView() [loplugin:stringview]}}
  55     ConstructWithView(s1.copy(1));
  56 }
  57 }
  58
  59 namespace test2
  60 {
  61 void f3(OUString s1)
  62 {
  63     // expected-error@+1 {{rather than copy, pass with a view using subView() [loplugin:stringview]}}
  64     OUString s2 = s1.copy(1, 2) + "xxx";
  65     // expected-error@+1 {{rather than copy, pass with a view using subView() [loplugin:stringview]}}
  66     s2 = s1.copy(1) + "xxx";
  67     // expected-error@+1 {{rather than copy, pass with a view using subView() [loplugin:stringview]}}
  68     s2 = "xxx" + s1.copy(1);
  69     // expected-error@+1 {{rather than copy, pass with a view using subView() [loplugin:stringview]}}
  70     s2 += s1.copy(1);
  71 }
  72 void f3(OString s1)
  73 {
  74     // expected-error@+1 {{rather than copy, pass with a view using subView() [loplugin:stringview]}}
  75     OString s2 = s1.copy(1, 2) + "xxx";
  76     (void)s2;
  77     // expected-error@+1 {{rather than copy, pass with a view using subView() [loplugin:stringview]}}
  78     OString s3 = s1.copy(1) + "xxx";
  79     (void)s3;
  80 }
  81 }
  82
  83 namespace test3
  84 {
  85 void f4(OUString s1, OUString s2)
  86 {
  87     // expected-error@+1 {{rather than copy, pass with a view using subView() [loplugin:stringview]}}
  88     sal_Unicode x = s2.copy(1, 2)[12];
  89     (void)x;
  90     // expected-error@+1 {{rather than copy, pass with a view using subView() [loplugin:stringview]}}
  91     if (s2.copy(1, 2) < s1)
  92         ;
  93 }
  94 }
  95
  96 void f5()
  97 {
  98     // expected-error@+1 {{instead of an empty 'rtl::OString', pass an empty 'std::string_view' [loplugin:stringview]}}
  99     call_view(OString());
 100     // expected-error@+1 {{instead of an empty 'rtl::OUString', pass an empty 'std::u16string_view' [loplugin:stringview]}}
 101     call_view(OUString());
 102 }
 103
 104 /* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */