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    1 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
    2 <html>
    3 <head>
    4 <title>SWIG and C++17</title>
    5 <link rel="stylesheet" type="text/css" href="style.css">
    6 <meta http-equiv="content-type" content="text/html; charset=UTF-8">
    7 </head>
    8 
    9 <body bgcolor="#ffffff">
   10 <H1><a name="CPlusPlus17">9 SWIG and C++17</a></H1>
   11 <!-- INDEX -->
   12 <div class="sectiontoc">
   13 <ul>
   14 <li><a href="#CPlusPlus17_introduction">Introduction</a>
   15 <li><a href="#CPlusPlus17_core_language_changes">Core language changes</a>
   16 <ul>
   17 <li><a href="#CPlusPlus17_nested_namespaces">Nested namespace definitions</a>
   18 <li><a href="#CPlusPlus17_u8_char_literals">UTF-8 character literals</a>
   19 <li><a href="#CPlusPlus17_hexadecimal_floating_literals">Hexadecimal floating literals</a>
   20 </ul>
   21 <li><a href="#CPlusPlus17_standard_library_changes">Standard library changes</a>
   22 </ul>
   23 </div>
   24 <!-- INDEX -->
   25 
   26 
   27 
   28 <H2><a name="CPlusPlus17_introduction">9.1 Introduction</a></H2>
   29 
   30 
   31 <p>This chapter gives you a brief overview about the SWIG
   32 implementation of the C++17 standard.
   33 There isn't much in C++17 that affects SWIG, however, work has only just begun on adding
   34 C++17 support.
   35 </p>
   36 
   37 <p>
   38 <b>Compatibility note:</b> SWIG-4.0.0 is the first version to support any C++17 features.
   39 </p>
   40 
   41 <H2><a name="CPlusPlus17_core_language_changes">9.2 Core language changes</a></H2>
   42 
   43 
   44 <H3><a name="CPlusPlus17_nested_namespaces">9.2.1 Nested namespace definitions</a></H3>
   45 
   46 
   47 <p>
   48 C++17 offers a more concise syntax for defining namespaces.
   49 SWIG has support for nested namespace definitions such as:
   50 </p>
   51 
   52 <div class="code">
   53 <pre>
   54 namespace A::B::C {
   55   ...
   56 }
   57 </pre>
   58 </div>
   59 
   60 <p>
   61 This is the equivalent to the C++98 namespace definitions:
   62 </p>
   63 
   64 <div class="code">
   65 <pre>
   66 namespace A {
   67   namespace B {
   68     namespace C {
   69       ...
   70     }
   71   }
   72 }
   73 </pre>
   74 </div>
   75 
   76 <H3><a name="CPlusPlus17_u8_char_literals">9.2.2 UTF-8 character literals</a></H3>
   77 
   78 
   79 <p>
   80 C++17 added UTF-8 (u8) character literals.
   81 These are of type char.
   82 Example:
   83 </p>
   84 
   85 <div class="code">
   86 <pre>
   87 char a = u8'a';
   88 </pre>
   89 </div>
   90 
   91 <H3><a name="CPlusPlus17_hexadecimal_floating_literals">9.2.3 Hexadecimal floating literals</a></H3>
   92 
   93 
   94 <p>
   95 C++17 added hexadecimal floating literals.
   96 For example:
   97 </p>
   98 
   99 <div class="code">
  100 <pre>
  101 double f = 0xF.68p2;
  102 </pre>
  103 </div>
  104 
  105 <H2><a name="CPlusPlus17_standard_library_changes">9.3 Standard library changes</a></H2>
  106 
  107 
  108 </body>
  109 </html>