/* ****************************************************************************
*
* Copyright (c) Microsoft Corporation.
*
* This source code is subject to terms and conditions of the Microsoft Public License. A
* copy of the license can be found in the License.html file at the root of this distribution. If
* you cannot locate the Microsoft Public License, please send an email to
* dlr@microsoft.com. By using this source code in any fashion, you are agreeing to be bound
* by the terms of the Microsoft Public License.
*
* You must not remove this notice, or any other, from this software.
*
*
* ***************************************************************************/
using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.Scripting.Utils;
namespace Microsoft.Scripting.Actions.Calls{
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1815:OverrideEqualsAndOperatorEqualsOnValueTypes")] // TODO
public struct ArgumentBinding {
private static readonly int[] _EmptyBinding = new int[0];
private readonly int _positionalArgCount;
private readonly int[] _binding; // immutable
internal ArgumentBinding(int positionalArgCount) {
_positionalArgCount = positionalArgCount;
_binding = _EmptyBinding;
}
internal ArgumentBinding(int positionalArgCount, int[] binding) {
Assert.NotNull(binding);
_binding = binding;
_positionalArgCount = positionalArgCount;
}
public int PositionalArgCount {
get { return _positionalArgCount; }
}
public int ArgumentToParameter(int argumentIndex) {
int i = argumentIndex - _positionalArgCount;
return (i < 0) ? argumentIndex : _positionalArgCount + _binding[i];
}
}
}
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