func()

in pq/error.go [167:188]

• 16 lines of code
• 6 McCabe index (conditional complexity)

func (e *Error) causedBy(cause error) *Error {
	e.cause = cause
	other, ok := cause.(*Error)
	if !ok {
		return e
	}

	// merge error and cause context such that the cause context only reports
	// fields that differ from the current context.

	errCtx := &e.ctx
	causeCtx := &other.ctx

	if errCtx.id == causeCtx.id {
		causeCtx.id = 0 // delete common queue id from cause context
	}
	if errCtx.isPage && causeCtx.isPage && errCtx.page == causeCtx.page {
		causeCtx.isPage = false // delete common page id from cause context
	}

	return e
}