Merge GCC frontend into the branch

frontend/result.cc

@@ -0,0 +1,67 @@
+/* Miscellaneous types used across stage boundaries.
+   Copyright (C) 2025 Free Software Foundation, Inc.
+
+GCC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3, or (at your option)
+any later version.
+
+GCC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+#include "elna/frontend/result.h"
+
+namespace elna::frontend
+{
+    error::error(const char *path, const struct position position)
+        : position(position), path(path)
+    {
+    }
+
+    std::size_t error::line() const noexcept
+    {
+        return this->position.line;
+    }
+
+    std::size_t error::column() const noexcept
+    {
+        return this->position.column;
+    }
+
+    error_container::error_container(const char *input_file)
+        : input_file(input_file)
+    {
+    }
+
+    std::deque<std::unique_ptr<error>>& error_container::errors()
+    {
+        return m_errors;
+    }
+
+    bool error_container::has_errors() const
+    {
+        return !m_errors.empty();
+    }
+
+    bool identifier_definition::operator==(const identifier_definition& that) const
+    {
+        return *this == that.name;
+    }
+
+    bool identifier_definition::operator==(const std::string& that) const
+    {
+        return this->name == that;
+    }
+}
+
+std::size_t std::hash<elna::frontend::identifier_definition>::operator()(
+        const elna::frontend::identifier_definition& key) const
+{
+    return std::hash<std::string>{}(key.name);
+}