github.com/m3db/m3@v1.5.0/src/x/errors/example_test.go (about)

     1  // Copyright (c) 2016 Uber Technologies, Inc.
     2  //
     3  // Permission is hereby granted, free of charge, to any person obtaining a copy
     4  // of this software and associated documentation files (the "Software"), to deal
     5  // in the Software without restriction, including without limitation the rights
     6  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     7  // copies of the Software, and to permit persons to whom the Software is
     8  // furnished to do so, subject to the following conditions:
     9  //
    10  // The above copyright notice and this permission notice shall be included in
    11  // all copies or substantial portions of the Software.
    12  //
    13  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    14  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    15  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    16  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    17  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    18  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    19  // THE SOFTWARE.
    20  
    21  package errors_test
    22  
    23  import (
    24  	"fmt"
    25  	"strings"
    26  
    27  	"github.com/m3db/m3/src/x/errors"
    28  )
    29  
    30  func ExampleMultiError() {
    31  	multiErr := errors.NewMultiError()
    32  
    33  	for i := 0; i < 3; i++ {
    34  		// Perform some work which may fail.
    35  		err := fmt.Errorf("error %d", i)
    36  
    37  		if err != nil {
    38  			// Add returns a new MultiError.
    39  			multiErr = multiErr.Add(err)
    40  		}
    41  	}
    42  
    43  	if err := multiErr.FinalError(); err != nil {
    44  		msg := strings.Replace(err.Error(), "\n", "; ", -1)
    45  		fmt.Println(msg)
    46  	}
    47  
    48  	if err := multiErr.LastError(); err != nil {
    49  		fmt.Println(err)
    50  	}
    51  
    52  	// Output:
    53  	// error 0; error 1; error 2
    54  	// error 2
    55  }