/// <summary>
/// Gets the <see cref="SwiPrologTerm"/> of the given variable name or throw an ArgumentException.
/// </summary>
/// <param name="name">The name of the variable</param>
/// <returns>The PlTerm (value) of the variable </returns>
/// <exception cref="ArgumentException">Is thrown if the name is not the name of a variable.</exception>
public SwiPrologTerm this[string name]
{
get
{
SwiPrologQueryVariable v = _vars.Find(n1 => n1.Name == name);
if (v == null)
{
throw new ArgumentException("'" + name + "' is not a variable", "name");
}
return(v.Value);
}
}
/// <summary>
///
/// </summary>
/// <param name="key"></param>
/// <param name="value"></param>
/// <returns></returns>
public bool TryGetValue(string key, out object value)
{
SwiPrologQueryVariable v = _vars.Find(n1 => n1.Name == key);
if (v == null)
{
value = null;
return(false);
}
value = v.Value;
return(true);
}
object IDictionary <string, object> .this[string name]
{
get
{
SwiPrologQueryVariable v = _vars.Find(n1 => n1.Name == name);
if (v == null)
{
throw new ArgumentException("'" + name + "' is not a variable", "name");
}
return(v.Value);
}
set
{
throw new InvalidOperationException();
}
}
internal void Add(SwiPrologQueryVariable var)
{
_vars.Add(var);
}