From 1afa4b89fdb0e14d90bfc087118cfff0700bc5c4 Mon Sep 17 00:00:00 2001
From: Peter Dimov <pdimov@gmail.com>
Date: Mon, 25 Nov 2019 03:25:57 +0200
Subject: [PATCH] Add boost::source_location

---
 include/boost/assert/source_location.hpp | 69 ++++++++++++++++++++++++
 test/Jamfile.v2                          |  3 ++
 test/source_location_test.cpp            | 30 +++++++++++
 test/source_location_test2.cpp           | 32 +++++++++++
 4 files changed, 134 insertions(+)
 create mode 100644 include/boost/assert/source_location.hpp
 create mode 100644 test/source_location_test.cpp
 create mode 100644 test/source_location_test2.cpp

diff --git a/include/boost/assert/source_location.hpp b/include/boost/assert/source_location.hpp
new file mode 100644
index 0000000..8c3ef49
--- /dev/null
+++ b/include/boost/assert/source_location.hpp
@@ -0,0 +1,69 @@
+#ifndef BOOST_ASSERT_SOURCE_LOCATION_HPP_INCLUDED
+#define BOOST_ASSERT_SOURCE_LOCATION_HPP_INCLUDED
+
+//  http://www.boost.org/libs/assert
+//
+//  Copyright 2019 Peter Dimov
+//  Distributed under the Boost Software License, Version 1.0.
+//  http://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/current_function.hpp>
+#include <boost/config.hpp>
+#include <boost/cstdint.hpp>
+
+namespace boost
+{
+
+struct source_location
+{
+private:
+
+    char const * file_;
+    char const * function_;
+    boost::uint_least32_t line_;
+    boost::uint_least32_t column_;
+
+public:
+
+    BOOST_CONSTEXPR source_location() BOOST_NOEXCEPT: file_( "(unknown)" ), function_( file_ ), line_( 0 ), column_( 0 )
+    {
+    }
+
+    BOOST_CONSTEXPR source_location( char const * file, boost::uint_least32_t line, char const * function, boost::uint_least32_t column = 0 ) BOOST_NOEXCEPT: file_( file ), function_( function ), line_( line ), column_( column )
+    {
+    }
+
+    BOOST_CONSTEXPR char const * file_name() const BOOST_NOEXCEPT
+    {
+        return file_;
+    }
+
+    BOOST_CONSTEXPR char const * function_name() const BOOST_NOEXCEPT
+    {
+        return function_;
+    }
+
+    BOOST_CONSTEXPR boost::uint_least32_t line() const BOOST_NOEXCEPT
+    {
+        return line_;
+    }
+
+    BOOST_CONSTEXPR boost::uint_least32_t column() const BOOST_NOEXCEPT
+    {
+        return column_;
+    }
+};
+
+} // namespace boost
+
+#if defined( BOOST_DISABLE_CURRENT_LOCATION )
+
+#  define BOOST_CURRENT_LOCATION ::boost::source_location()
+
+#else
+
+#  define BOOST_CURRENT_LOCATION ::boost::source_location(__FILE__, __LINE__, BOOST_CURRENT_FUNCTION)
+
+#endif
+
+#endif // #ifndef BOOST_ASSERT_SOURCE_LOCATION_HPP_INCLUDED
diff --git a/test/Jamfile.v2 b/test/Jamfile.v2
index d1595c8..5d8f0c7 100644
--- a/test/Jamfile.v2
+++ b/test/Jamfile.v2
@@ -27,3 +27,6 @@ run assert_msg_test2.cpp ;
 run quick.cpp ;
 
 run current_function_test2.cpp ;
+
+run source_location_test.cpp ;
+run source_location_test2.cpp ;
diff --git a/test/source_location_test.cpp b/test/source_location_test.cpp
new file mode 100644
index 0000000..f94e230
--- /dev/null
+++ b/test/source_location_test.cpp
@@ -0,0 +1,30 @@
+// Copyright 2019 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// http://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/assert/source_location.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+int main()
+{
+    {
+        boost::source_location loc;
+
+        BOOST_TEST_CSTR_EQ( loc.file_name(), "(unknown)" );
+        BOOST_TEST_CSTR_EQ( loc.function_name(), "(unknown)" );
+        BOOST_TEST_EQ( loc.line(), 0 );
+        BOOST_TEST_EQ( loc.column(), 0 );
+    }
+
+    {
+        boost::source_location loc = BOOST_CURRENT_LOCATION;
+
+
+        BOOST_TEST_CSTR_EQ( loc.file_name(), __FILE__ );
+        BOOST_TEST_CSTR_EQ( loc.function_name(), BOOST_CURRENT_FUNCTION );
+        BOOST_TEST_EQ( loc.line(), 20 );
+        BOOST_TEST_EQ( loc.column(), 0 );
+    }
+
+    return boost::report_errors();
+}
diff --git a/test/source_location_test2.cpp b/test/source_location_test2.cpp
new file mode 100644
index 0000000..e21e3f6
--- /dev/null
+++ b/test/source_location_test2.cpp
@@ -0,0 +1,32 @@
+// Copyright 2019 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// http://www.boost.org/LICENSE_1_0.txt
+
+#define BOOST_DISABLE_CURRENT_LOCATION
+
+#include <boost/assert/source_location.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+int main()
+{
+    {
+        boost::source_location loc;
+
+        BOOST_TEST_CSTR_EQ( loc.file_name(), "(unknown)" );
+        BOOST_TEST_CSTR_EQ( loc.function_name(), "(unknown)" );
+        BOOST_TEST_EQ( loc.line(), 0 );
+        BOOST_TEST_EQ( loc.column(), 0 );
+    }
+
+    {
+        boost::source_location loc = BOOST_CURRENT_LOCATION;
+
+
+        BOOST_TEST_CSTR_EQ( loc.file_name(), "(unknown)" );
+        BOOST_TEST_CSTR_EQ( loc.function_name(), "(unknown)" );
+        BOOST_TEST_EQ( loc.line(), 0 );
+        BOOST_TEST_EQ( loc.column(), 0 );
+    }
+
+    return boost::report_errors();
+}