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Source file src/github.com/google/go-containerregistry/internal/and/and_closer.go

Documentation: github.com/google/go-containerregistry/internal/and

     1  // Copyright 2020 Google LLC All Rights Reserved.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //    http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  // Package and provides helpers for adding Close to io.{Reader|Writer}.
    16  package and
    17  
    18  import (
    19  	"io"
    20  )
    21  
    22  // ReadCloser implements io.ReadCloser by reading from a particular io.Reader
    23  // and then calling the provided "Close()" method.
    24  type ReadCloser struct {
    25  	io.Reader
    26  	CloseFunc func() error
    27  }
    28  
    29  var _ io.ReadCloser = (*ReadCloser)(nil)
    30  
    31  // Close implements io.ReadCloser
    32  func (rac *ReadCloser) Close() error {
    33  	return rac.CloseFunc()
    34  }
    35  
    36  // WriteCloser implements io.WriteCloser by reading from a particular io.Writer
    37  // and then calling the provided "Close()" method.
    38  type WriteCloser struct {
    39  	io.Writer
    40  	CloseFunc func() error
    41  }
    42  
    43  var _ io.WriteCloser = (*WriteCloser)(nil)
    44  
    45  // Close implements io.WriteCloser
    46  func (wac *WriteCloser) Close() error {
    47  	return wac.CloseFunc()
    48  }
    49  

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