mirror of https://github.com/swig/swig
121 lines
2.7 KiB
HTML
121 lines
2.7 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<title>SWIG and C++17</title>
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<link rel="stylesheet" type="text/css" href="style.css">
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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</head>
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<body bgcolor="#ffffff">
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<H1><a name="CPlusPlus17">9 SWIG and C++17</a></H1>
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<!-- INDEX -->
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<div class="sectiontoc">
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<ul>
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<li><a href="#CPlusPlus17_introduction">Introduction</a>
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<li><a href="#CPlusPlus17_core_language_changes">Core language changes</a>
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<ul>
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<li><a href="#CPlusPlus17_nested_namespaces">Nested namespace definitions</a>
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<li><a href="#CPlusPlus17_u8_char_literals">UTF-8 character literals</a>
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<li><a href="#CPlusPlus17_hexadecimal_floating_literals">Hexadecimal floating literals</a>
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<li><a href="#CPlusPlus17_fold_expressions">Fold expressions</a>
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</ul>
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<li><a href="#CPlusPlus17_standard_library_changes">Standard library changes</a>
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</ul>
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</div>
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<!-- INDEX -->
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<H2><a name="CPlusPlus17_introduction">9.1 Introduction</a></H2>
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<p>This chapter gives you a brief overview about the SWIG
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implementation of the C++17 standard.
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There isn't much in C++17 that affects SWIG, however, work has only just begun on adding
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C++17 support.
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</p>
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<p>
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<b>Compatibility note:</b> SWIG-4.0.0 is the first version to support any C++17 features.
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</p>
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<H2><a name="CPlusPlus17_core_language_changes">9.2 Core language changes</a></H2>
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<H3><a name="CPlusPlus17_nested_namespaces">9.2.1 Nested namespace definitions</a></H3>
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<p>
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C++17 offers a more concise syntax for defining namespaces.
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SWIG has support for nested namespace definitions such as:
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</p>
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<div class="code">
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<pre>
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namespace A::B::C {
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...
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}
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</pre>
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</div>
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<p>
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This is the equivalent to the C++98 namespace definitions:
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</p>
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<div class="code">
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<pre>
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namespace A {
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namespace B {
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namespace C {
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...
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}
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}
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}
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</pre>
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</div>
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<H3><a name="CPlusPlus17_u8_char_literals">9.2.2 UTF-8 character literals</a></H3>
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<p>
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C++17 added UTF-8 (u8) character literals.
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These are of type char.
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Example:
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</p>
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<div class="code">
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<pre>
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char a = u8'a';
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</pre>
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</div>
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<H3><a name="CPlusPlus17_hexadecimal_floating_literals">9.2.3 Hexadecimal floating literals</a></H3>
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<p>
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C++17 added hexadecimal floating literals.
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For example:
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</p>
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<div class="code">
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<pre>
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double f = 0xF.68p2;
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</pre>
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</div>
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<H3><a name="CPlusPlus17_fold_expressions">9.2.4 Fold expressions</a></H3>
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<p>
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C++17 added template fold expressions. SWIG 4.3.0 and later support
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parsing these with a few restrictions. Unary left fold expressions are
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not supported currently. Also the same restrictions that apply to other
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expressions apply here too.
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</p>
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<H2><a name="CPlusPlus17_standard_library_changes">9.3 Standard library changes</a></H2>
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</body>
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</html>
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