protocol/ArgParser: move struct RangeArg to separate header

Makefile.am

@@ -82,6 +82,7 @@ libmpd_a_SOURCES = \
 	src/open.h \
 	src/protocol/Ack.cxx src/protocol/Ack.hxx \
 	src/protocol/ArgParser.cxx src/protocol/ArgParser.hxx \
+	src/protocol/RangeArg.hxx \
 	src/protocol/Result.cxx src/protocol/Result.hxx \
 	src/command/Request.hxx \
 	src/command/CommandResult.hxx \

src/command/DatabaseCommands.cxx

@@ -26,6 +26,7 @@
 #include "db/Count.hxx"
 #include "db/Selection.hxx"
 #include "CommandError.hxx"
+#include "protocol/RangeArg.hxx"
 #include "client/Client.hxx"
 #include "client/Response.hxx"
 #include "tag/ParseName.hxx"

src/command/QueueCommands.cxx

@@ -21,6 +21,7 @@
 #include "QueueCommands.hxx"
 #include "Request.hxx"
 #include "CommandError.hxx"
+#include "protocol/RangeArg.hxx"
 #include "db/DatabaseQueue.hxx"
 #include "db/Selection.hxx"
 #include "song/Filter.hxx"

src/command/Request.hxx

@@ -22,6 +22,7 @@
 
 #include "check.h"
 #include "protocol/ArgParser.hxx"
+#include "protocol/RangeArg.hxx"
 #include "Chrono.hxx"
 #include "util/ConstBuffer.hxx"
 

src/protocol/ArgParser.cxx

@@ -19,6 +19,7 @@
 
 #include "config.h"
 #include "ArgParser.hxx"
+#include "RangeArg.hxx"
 #include "Ack.hxx"
 #include "Chrono.hxx"
 #include "util/NumberParser.hxx"

src/protocol/ArgParser.hxx

@@ -22,10 +22,9 @@
 
 #include "check.h"
 
-#include <limits>
-
 #include <stdint.h>
 
+struct RangeArg;
 class SongTime;
 class SignedSongTime;
 
@@ -38,19 +37,6 @@ ParseCommandArgInt(const char *s, int min_value, int max_value);
 int
 ParseCommandArgInt(const char *s);
 
-struct RangeArg {
-	unsigned start, end;
-
-	void SetAll() {
-		start = 0;
-		end = std::numeric_limits<unsigned>::max();
-	}
-
-	static constexpr RangeArg All() {
-		return { 0, std::numeric_limits<unsigned>::max() };
-	}
-};
-
 RangeArg
 ParseCommandArgRange(const char *s);
 

src/protocol/RangeArg.hxx

@@ -0,0 +1,40 @@
+/*
+ * Copyright 2003-2018 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * 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 2 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, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_PROTOCOL_RANGE_ARG_HXX
+#define MPD_PROTOCOL_RANGE_ARG_HXX
+
+#include "check.h"
+
+#include <limits>
+
+struct RangeArg {
+	unsigned start, end;
+
+	void SetAll() {
+		start = 0;
+		end = std::numeric_limits<unsigned>::max();
+	}
+
+	static constexpr RangeArg All() {
+		return { 0, std::numeric_limits<unsigned>::max() };
+	}
+};
+
+#endif

test/test_protocol.cxx

@@ -1,6 +1,7 @@
 #include "config.h"
 #include "protocol/ArgParser.hxx"
 #include "protocol/Ack.hxx"
+#include "protocol/RangeArg.hxx"
 #include "util/Compiler.h"
 
 #include <cppunit/TestFixture.h>