/// <summary>Registers a global constant.</summary>
/// <exception cref="Exception">Throws an exception if the global constant name already exists.</exception>
/// <param name="name">The global constant name.</param>
/// <param name="value">The global constant value.</param>
/// <returns>A Fluent EvalContext.</returns>
public EvalContext RegisterGlobalConstant(string name, object value)
{
if (!AliasGlobalConstants.TryAdd(name, Expression.Constant(value)))
{
throw new Exception(string.Format(ExceptionMessage.Unexpected_AliasRegistered, name));
}
return(this);
}
/// <summary>Unregisters a global constant.</summary>
/// <param name="aliases">The global constant name.</param>
/// <returns>An Fluent EvalContext.</returns>
public EvalContext UnregisterGlobalConstant(params string[] aliases)
{
foreach (var alias in aliases)
{
ConstantExpression value;
AliasGlobalConstants.TryRemove(alias, out value);
}
return(this);
}
/// <summary>Unregisters all kind of alias (Extension Methods, Names, Static Members, Types and Values).</summary>
/// <returns>An Fluent EvalContext.</returns>
public EvalContext UnregisterAll()
{
AliasExtensionMethods.Clear();
AliasGlobalConstants.Clear();
AliasGlobalVariables.Clear();
AliasNames.Clear();
AliasStaticMembers.Clear();
AliasTypes.Clear();
return(this);
}
