package bibtex import ( "errors" "fmt" ) var ( // ErrUnexpectedAtsign is an error for unexpected @ in {}. ErrUnexpectedAtsign = errors.New("unexpected @ sign") // ErrUnknownStringVar is an error for looking up undefined string var. ErrUnknownStringVar = errors.New("unknown string variable") ) // ErrParse is a parse error. type ErrParse struct { Pos tokenPos Err string // Error string returned from parser. } func (e *ErrParse) Error() string { return fmt.Sprintf("parse failed at %s: %s", e.Pos, e.Err) }