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package parsec
import "fmt"
type Node interface {
}
type Error struct {
pos int
Message string
}
func (e Error) Pos() int { return e.pos }
func (e Error) Error() string { return fmt.Sprintf("offset %d: %s", e.pos, e.Message) }
func NewError(pos int, message string) Error {
return Error{pos, message}
}
func IsError(n interface{}) bool {
_, isErr := n.(Error)
return isErr
}
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