// Unused.
public static T GetVariableValue <T>(string name)
{
VariantItem item = GetVariable(name);
if (item.Value is T typedValue)
{
return(typedValue);
}
throw new Exception("Value does not match the expected type.");
}
private static void DisplayVariable(VariantItem item)
{
Console.Out.WriteLine("{0} [{1}]:", item.Name, VariantUtility.FindTypeNameByType(item.Type));
Console.Out.WriteLine("\t{0}", ConsoleUtility.For(item.Type).Format(item.Value) ?? "<null>");
Console.Out.WriteLine();
}
// Unused.
public static object GetVariableValue(string name)
{
VariantItem item = GetVariable(name);
return(item?.Value);
}
private static void Main(string[] args)
{
Queue <string> argv = new Queue <string>(args);
if (!argv.Any())
{
Console.Error.WriteLine(@"dbv <command> [...]
commands:
ls List all variables.
set <name> <type> [value] Set a variable's value. If the value is omitted, null is set.
get <name> Get a variable's value.
rm <name> Remove a variable.");
return;
}
string command = argv.Dequeue();
switch (command)
{
case "ls":
{
var allVariables = VariantUtility.GetAllVariables().ToList();
foreach (VariantItem variant in allVariables)
{
DisplayVariable(variant);
}
Console.WriteLine("{0} variable(s)", allVariables.Count);
}
break;
case "get":
{
string name = argv.Dequeue();
if (name == null)
{
Console.Error.WriteLine("Variable name is missing.");
return;
}
VariantItem item = VariantUtility.GetVariable(name);
DisplayVariable(item);
}
break;
case "set":
{
string name = argv.DequeueOrDefault();
string typeName = argv.DequeueOrDefault();
string value = argv.DequeueOrDefault();
if (name == null)
{
Console.Error.WriteLine("Variable name is missing.");
return;
}
if (typeName == null)
{
Console.Error.WriteLine("Type name is missing.");
return;
}
Type type = VariantUtility.FindTypeByTypeName(typeName);
if (type == null)
{
Console.Error.WriteLine("Unrecognized data type.");
return;
}
VariantUtility.SetVariableValue(name, type, ParameterUtility.For(type).Parse(value));
}
break;
case "rm":
{
string name = argv.DequeueOrDefault();
if (name != null)
{
VariantUtility.RemoveVariable(name);
}
}
break;
default:
Console.Error.WriteLine("Unrecognized command.");
break;
}
}