Source file src/github.com/goph/emperror/cause.go

Documentation: github.com/goph/emperror

     1  package emperror
     2  
     3  // ForEachCause loops through an error chain and calls a function for each of them,
     4  // starting with the topmost one.
     5  //
     6  // The function can return false to break the loop before it ends.
     7  func ForEachCause(err error, fn func(err error) bool) {
     8  	// causer is the interface defined in github.com/pkg/errors for specifying a parent error.
     9  	type causer interface {
    10  		Cause() error
    11  	}
    12  
    13  	for err != nil {
    14  		continueLoop := fn(err)
    15  		if !continueLoop {
    16  			break
    17  		}
    18  
    19  		cause, ok := err.(causer)
    20  		if !ok {
    21  			break
    22  		}
    23  
    24  		err = cause.Cause()
    25  	}
    26  }
    27  

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