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DeleteReplCommand.cs
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DeleteReplCommand.cs
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// MetaphysicsIndustries.Giza - A Parsing System
// Copyright (C) 2008-2022 Metaphysics Industries, Inc.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 3 of the License, or (at your option) any later version.
//
// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
// USA
using System;
using NCommander;
using System.IO;
using System.Collections.Generic;
using MetaphysicsIndustries.Giza;
namespace giza
{
public class DeleteReplCommand : ReplCommand
{
public DeleteReplCommand(Dictionary<string, Definition> env)
: base(env)
{
Name = "delete";
Description = "Delete the specified definitions.";
Params = new [] {
new Parameter {
Name="def-names",
ParameterType=ParameterType.StringArray,
Description="The names of the definitions to delete. If '*' is given, then all definitions are deleted.",
},
};
}
protected override void InternalExecute(Dictionary<string, object> args)
{
var defsToDelete = (string[])args["def-names"];
if (defsToDelete == null ||
defsToDelete.Length < 1)
{
Console.WriteLine("Error: no definitions were specified.");
return;
}
if (defsToDelete.Length == 1 &&
defsToDelete[0] == "*")
{
Env.Clear();
Console.WriteLine("All definitions were deleted.");
return;
}
var someAreMissing = false;
foreach (var name in defsToDelete)
{
if (!Env.ContainsKey(name))
{
Console.WriteLine("Error: There is no definition named \"{0}\".", name);
someAreMissing = true;
}
}
if (someAreMissing)
{
Console.WriteLine("No definitions were deleted.");
}
else
{
foreach (var name in defsToDelete)
{
Env.Remove(name);
}
}
}
}
}