12345678910111213141516171819202122232425262728293031323334 |
- package generator
- import (
- "io"
- )
- // ErrorTracker tracks errors to the underlying writer, so that you can ignore
- // them until you're ready to return.
- type ErrorTracker struct {
- io.Writer
- err error
- }
- // NewErrorTracker makes a new error tracker; note that it implements io.Writer.
- func NewErrorTracker(w io.Writer) *ErrorTracker {
- return &ErrorTracker{Writer: w}
- }
- // Write intercepts calls to Write.
- func (et *ErrorTracker) Write(p []byte) (n int, err error) {
- if et.err != nil {
- return 0, et.err
- }
- n, err = et.Writer.Write(p)
- if err != nil {
- et.err = err
- }
- return n, err
- }
- // Error returns nil if no error has occurred, otherwise it returns the error.
- func (et *ErrorTracker) Error() error {
- return et.err
- }
|