Item AST

1 files changed, 90 insertions, 0 deletions

diff --git a/src/io/span.hpp b/src/io/span.hpp
new file mode 100644
index 0000000..e474a7a
--- /dev/null
+++ b/src/io/span.hpp
@@ -0,0 +1,90 @@
+#pragma once
+//    io/span.hpp - Tracking info about input
+//
+//    Copyright © 2014 Ben Longbons <b.r.longbons@gmail.com>
+//
+//    This file is part of The Mana World (Athena server)
+//
+//    This program 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 of the License, or
+//    (at your option) any later version.
+//
+//    This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+
+#include "fwd.hpp"
+
+#include "../strings/rstring.hpp"
+#include "../strings/zstring.hpp"
+#include "../strings/literal.hpp"
+
+
+namespace tmwa
+{
+namespace io
+{
+    // TODO split this out
+    struct Line
+    {
+        RString text;
+
+        RString filename;
+        // 1-based
+        uint16_t line, column;
+
+        AString message_str(ZString cat, ZString msg) const;
+        AString note_str(ZString msg) const { return message_str("note"_s, msg); }
+        AString warning_str(ZString msg) const { return message_str("warning"_s, msg); }
+        AString error_str(ZString msg) const { return message_str("error"_s, msg); }
+        void message(ZString cat, ZString msg) const;
+        void note(ZString msg) const { message("note"_s, msg); }
+        void warning(ZString msg) const { message("warning"_s, msg); }
+        void error(ZString msg) const { message("error"_s, msg); }
+    };
+
+    // psst, don't tell anyone
+    struct LineChar : Line
+    {
+        char ch()
+        {
+            size_t c = column - 1;
+            if (c == text.size())
+                return '\n';
+            return text[c];
+        }
+    };
+
+    struct LineSpan
+    {
+        LineChar begin, end;
+
+        AString message_str(ZString cat, ZString msg) const;
+        AString note_str(ZString msg) const { return message_str("note"_s, msg); }
+        AString warning_str(ZString msg) const { return message_str("warning"_s, msg); }
+        AString error_str(ZString msg) const { return message_str("error"_s, msg); }
+        void message(ZString cat, ZString msg) const;
+        void note(ZString msg) const { message("note"_s, msg); }
+        void warning(ZString msg) const { message("warning"_s, msg); }
+        void error(ZString msg) const { message("error"_s, msg); }
+    };
+
+    template<class T>
+    struct Spanned
+    {
+        T data;
+        LineSpan span;
+    };
+
+    template<class T>
+    Spanned<T> respan(LineSpan span, T data)
+    {
+        return Spanned<T>{std::move(data), std::move(span)};
+    }
+} // namespace io
+} // namespace tmwa