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diff --git a/src/readline_possibilities.hh b/src/readline_possibilities.hh
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+/**
+ * Copyright (c) 2015, Timothy Stack
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * * Neither the name of Timothy Stack nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef LNAV_READLINE_POSSIBILITIES_H
+#define LNAV_READLINE_POSSIBILITIES_H
+
+#include <string>
+
+#include "readline_curses.hh"
+#include "textview_curses.hh"
+#include "view_helpers.hh"
+
+enum class text_quoting {
+    none,
+    sql,
+    regex,
+};
+
+void add_view_text_possibilities(readline_curses* rlc,
+                                 int context,
+                                 const std::string& type,
+                                 textview_curses* tc,
+                                 text_quoting tq);
+
+template<typename T,
+         typename... Args,
+         std::enable_if_t<std::is_enum<T>::value, bool> = true>
+void
+add_view_text_possibilities(readline_curses* rlc, T context, Args... args)
+{
+    add_view_text_possibilities(
+        rlc, lnav::enums::to_underlying(context), args...);
+}
+
+void add_filter_expr_possibilities(readline_curses* rlc,
+                                   int context,
+                                   const std::string& type);
+
+template<typename T,
+         typename... Args,
+         std::enable_if_t<std::is_enum<T>::value, bool> = true>
+void
+add_filter_expr_possibilities(readline_curses* rlc, T context, Args... args)
+{
+    add_filter_expr_possibilities(
+        rlc, lnav::enums::to_underlying(context), args...);
+}
+
+void add_env_possibilities(ln_mode_t context);
+void add_filter_possibilities(textview_curses* tc);
+void add_mark_possibilities();
+void add_config_possibilities();
+void add_tag_possibilities();
+void add_file_possibilities();
+void add_recent_netlocs_possibilities();
+
+extern struct sqlite_metadata_callbacks lnav_sql_meta_callbacks;
+
+#endif  // LNAV_READLINE_POSSIBILITIES_H