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diff --git a/src/ast/npc.hpp b/src/ast/npc.hpp
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+++ b/src/ast/npc.hpp
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+#pragma once
+//    ast/npc.hpp - Structure of non-player characters (including mobs).
+//
+//    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 "../compat/result.hpp"
+
+#include "../io/span.hpp"
+
+#include "../net/timer.t.hpp"
+
+#include "../sexpr/variant.hpp"
+
+#include "../mmo/clif.t.hpp"
+#include "../mmo/ids.hpp"
+#include "../mmo/strs.hpp"
+
+#include "script.hpp"
+
+
+namespace tmwa
+{
+namespace ast
+{
+namespace npc
+{
+    using io::Spanned;
+
+    struct Comment
+    {
+        RString comment;
+    };
+    struct Warp
+    {
+        Spanned<MapName> m;
+        Spanned<unsigned> x, y;
+        io::LineSpan key_span;
+        Spanned<NpcName> name;
+        Spanned<unsigned> xs, ys;
+        Spanned<MapName> to_m;
+        Spanned<unsigned> to_x, to_y;
+    };
+    struct ShopItem
+    {
+        Spanned<ItemName> name;
+        bool value_multiply;
+        Spanned<int> value;
+    };
+    struct Shop
+    {
+        Spanned<MapName> m;
+        Spanned<unsigned> x, y;
+        Spanned<DIR> d;
+        io::LineSpan key_span;
+        Spanned<NpcName> name;
+        Spanned<Species> npc_class;
+        Spanned<std::vector<Spanned<ShopItem>>> items;
+    };
+    struct Monster
+    {
+        Spanned<MapName> m;
+        Spanned<unsigned> x, y;
+        Spanned<unsigned> xs, ys;
+        io::LineSpan key_span;
+        Spanned<MobName> name;
+        Spanned<Species> mob_class;
+        Spanned<unsigned> num;
+        Spanned<interval_t> delay1, delay2;
+        Spanned<NpcEvent> event;
+    };
+    struct MapFlag
+    {
+        Spanned<MapName> m;
+        io::LineSpan key_span;
+        Spanned<RString> name;
+        Spanned<std::vector<Spanned<RString>>> vec_extra;
+    };
+    struct ScriptFunction
+    {
+        io::LineSpan key1_span;
+        Spanned<RString> name;
+    };
+    struct ScriptNone
+    {
+        io::LineSpan key1_span;
+        Spanned<NpcName> name;
+        io::LineSpan key4_span;
+    };
+    struct ScriptMap
+    {
+        Spanned<MapName> m;
+        Spanned<unsigned> x, y;
+        Spanned<DIR> d;
+        Spanned<NpcName> name;
+        Spanned<Species> npc_class;
+        Spanned<unsigned> xs, ys;
+    };
+    using ScriptBase = Variant<ScriptFunction, ScriptNone, ScriptMap>;
+    struct Script : ScriptBase
+    {
+        Script() = default;
+        Script(ScriptFunction s) : ScriptBase(std::move(s)) {}
+        Script(ScriptNone s) : ScriptBase(std::move(s)) {}
+        Script(ScriptMap s) : ScriptBase(std::move(s)) {}
+
+        io::LineSpan key_span;
+        ast::script::ScriptBody body;
+    };
+    using TopLevelBase = Variant<Comment, Warp, Shop, Monster, MapFlag, Script>;
+    struct TopLevel : TopLevelBase
+    {
+        TopLevel() = default;
+        TopLevel(Comment t) : TopLevelBase(std::move(t)) {}
+        TopLevel(Warp t) : TopLevelBase(std::move(t)) {}
+        TopLevel(Shop t) : TopLevelBase(std::move(t)) {}
+        TopLevel(Monster t) : TopLevelBase(std::move(t)) {}
+        TopLevel(MapFlag t) : TopLevelBase(std::move(t)) {}
+        TopLevel(Script t) : TopLevelBase(std::move(t)) {}
+        io::LineSpan span;
+    };
+
+    Option<Result<TopLevel>> parse_top(io::LineCharReader& in);
+} // namespace npc
+} // namespace ast
+} // namespace tmwa