From 483eb2f56657e8e7f419ab1a4fab8dce9ade8609 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sat, 27 Apr 2024 20:24:20 +0200
Subject: Adding upstream version 14.2.21.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 src/boost/libs/spirit/test/x3/rule3.cpp | 109 ++++++++++++++++++++++++++++++++
 1 file changed, 109 insertions(+)
 create mode 100644 src/boost/libs/spirit/test/x3/rule3.cpp

(limited to 'src/boost/libs/spirit/test/x3/rule3.cpp')

diff --git a/src/boost/libs/spirit/test/x3/rule3.cpp b/src/boost/libs/spirit/test/x3/rule3.cpp
new file mode 100644
index 00000000..420146c0
--- /dev/null
+++ b/src/boost/libs/spirit/test/x3/rule3.cpp
@@ -0,0 +1,109 @@
+/*=============================================================================
+    Copyright (c) 2001-2012 Joel de Guzman
+
+    Distributed under the Boost Software License, Version 1.0. (See accompanying
+    file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+=============================================================================*/
+
+#include <boost/detail/lightweight_test.hpp>
+#include <boost/spirit/home/x3.hpp>
+#include <boost/fusion/include/std_pair.hpp>
+
+#include <string>
+#include <cstring>
+#include <iostream>
+#include "test.hpp"
+
+using boost::spirit::x3::_val;
+
+struct f
+{
+    template <typename Context>
+    void operator()(Context const& ctx) const
+    {
+        _val(ctx) += _attr(ctx);
+    }
+};
+
+
+struct stationary : boost::noncopyable
+{
+    explicit stationary(int i) : val{i} {}
+    stationary& operator=(int i) { val = i; return *this; }
+
+    int val;
+};
+
+
+namespace check_stationary {
+
+boost::spirit::x3::rule<class a_r, stationary> const a;
+boost::spirit::x3::rule<class b_r, stationary> const b;
+
+auto const a_def = '{' >> boost::spirit::x3::int_ >> '}';
+auto const b_def = a;
+
+BOOST_SPIRIT_DEFINE(a, b)
+
+}
+
+
+int main()
+{
+    using spirit_test::test_attr;
+    using spirit_test::test;
+
+    using namespace boost::spirit::x3::ascii;
+    using boost::spirit::x3::rule;
+    using boost::spirit::x3::lit;
+    using boost::spirit::x3::eps;
+    using boost::spirit::x3::unused_type;
+
+
+    { // synth attribute value-init
+
+        std::string s;
+        typedef rule<class r, std::string> rule_type;
+
+        auto rdef = rule_type()
+            = alpha                 [f()]
+            ;
+
+        BOOST_TEST(test_attr("abcdef", +rdef, s));
+        BOOST_TEST(s == "abcdef");
+    }
+
+    { // synth attribute value-init
+
+        std::string s;
+        typedef rule<class r, std::string> rule_type;
+
+        auto rdef = rule_type() =
+            alpha /
+               [](auto& ctx)
+               {
+                  _val(ctx) += _attr(ctx);
+               }
+            ;
+
+        BOOST_TEST(test_attr("abcdef", +rdef, s));
+        BOOST_TEST(s == "abcdef");
+    }
+
+    {
+        auto r = rule<class r, int>{} = eps[([] (auto& ctx) {
+            using boost::spirit::x3::_val;
+            static_assert(std::is_same<std::decay_t<decltype(_val(ctx))>, unused_type>::value,
+                "Attribute must not be synthesized");
+        })];
+        BOOST_TEST(test("", r));
+    }
+
+    { // ensure no unneded synthesization, copying and moving occured
+        stationary st { 0 };
+        BOOST_TEST(test_attr("{42}", check_stationary::b, st));
+        BOOST_TEST_EQ(st.val, 42);
+    }
+
+    return boost::report_errors();
+}
-- 
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