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62 lines
2.8 KiB
62 lines
2.8 KiB
#Region "Copyright notice and license"
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' Protocol Buffers - Google's data interchange format
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' Copyright 2008 Google Inc. All rights reserved.
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' https://developers.google.com/protocol-buffers/
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'
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' Redistribution and use in source and binary forms, with or without
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' modification, are permitted provided that the following conditions are
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' met:
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'
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' * Redistributions of source code must retain the above copyright
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' notice, this list of conditions and the following disclaimer.
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' * Redistributions in binary form must reproduce the above
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' copyright notice, this list of conditions and the following disclaimer
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' in the documentation and/or other materials provided with the
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' distribution.
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' * Neither the name of Google Inc. nor the names of its
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' contributors may be used to endorse or promote products derived from
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' this software without specific prior written permission.
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'
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' THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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' "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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' LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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' A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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' OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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' SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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' LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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' DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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' THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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' (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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' OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#End Region
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Imports System.Collections.Generic
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Imports System.Collections.ObjectModel
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Namespace Google.Protobuf.Reflection
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''' <summary>
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''' Internal class containing utility methods when working with descriptors.
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''' </summary>
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Friend Module DescriptorUtil
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''' <summary>
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''' Equivalent to Func[TInput, int, TOutput] but usable in .NET 2.0. Only used to convert
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''' arrays.
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''' </summary>
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Friend Delegate Function IndexedConverter(Of TInput, TOutput)(element As TInput, index As Integer) As TOutput
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''' <summary>
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''' Converts the given array into a read-only list, applying the specified conversion to
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''' each input element.
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''' </summary>
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Friend Function ConvertAndMakeReadOnly(Of TInput, TOutput)(input As IList(Of TInput), converter As IndexedConverter(Of TInput, TOutput)) As IList(Of TOutput)
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Dim array = New TOutput(input.Count - 1) {}
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For i = 0 To array.Length - 1
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array(i) = converter(input(i), i)
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Next
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Return New ReadOnlyCollection(Of TOutput)(array)
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End Function
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End Module
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End Namespace
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