Better testing of examples, better tests coverage

example/assert_handler.cpp

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+// Copyright Antony Polukhin, 2016.
+//
+// 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)
+
+#define BOOST_ENABLE_ASSERT_HANDLER
+
+#include <boost/array.hpp>
+BOOST_NOINLINE void foo(int i);
+BOOST_NOINLINE void bar(int i);
+ 
+BOOST_NOINLINE void bar(int i) {
+    boost::array<int, 5> a = {{101, 100, 123, 23, 32}};
+    if (i >= 0) {
+        foo(a[i]);
+    } else {
+        std::exit(1);
+    }
+}
+
+BOOST_NOINLINE void foo(int i) {
+    bar(--i);
+}
+
+namespace std { inline void ignore_abort(){ std::exit(0); } }
+#define abort ignore_abort
+
+//[getting_started_assert_handlers
+
+// BOOST_ENABLE_ASSERT_DEBUG_HANDLER is defined for the whole project
+#include <stdexcept>    // std::logic_error
+#include <iostream>     // std::cerr
+#include <boost/stacktrace.hpp>
+
+namespace boost {
+    inline void assertion_failed_msg(char const* expr, char const* msg, char const* function, char const* file, long line) {
+        std::cerr << "Expression '" << expr << "' is false in function '" << function << "': " << (msg ? msg : "<...>") << ".\n"
+            << "Backtrace:\n" << boost::stacktrace::stacktrace() << '\n';
+        std::abort();
+    }
+
+    inline void assertion_failed(char const* expr, char const* function, char const* file, long line) {
+        ::boost::assertion_failed_msg(expr, 0 /*nullptr*/, function, file, line);
+    }
+} // namespace boost
+//]
+
+
+int main() {
+    foo(5);
+    
+    return 2;
+}
+
+