errors

Documentation

Index

• Variables
• func Break() error
• func Continue() error
• func Error(pos lexer.Position, err error) error
• func Errorf(pos lexer.Position, f string, a ...interface{}) error
• func IsBreak(err error) bool
• func IsContinue(err error) bool
• func IsError(err error) bool
• func IsNoFieldErr(err error) bool
• func IsReturn(err error) bool
• func IsVisitorExit(err error) bool
• func IsVisitorStop(err error) bool
• func NewReturn(v interface{}) error
• func NoField(pos lexer.Position, v interface{}, n string) error
• type NoFieldError
  • func GetNoFieldErr(err error) (*NoFieldError, bool)
  • func (e *NoFieldError) Error() string
  • func (e *NoFieldError) Name() string
  • func (e *NoFieldError) Value() interface{}
• type ReturnError
  • func (r *ReturnError) Error() string
  • func (r *ReturnError) Value() interface{}

Variables

var (

	// VisitorExit is an error which will terminate the Visitor.
	// This is the same as any error occurring within a Visitor except that the final error
	// returned from specific handlers will become nil.
	VisitorExit = errors.New("visitor exit")

	// VisitorStop is an error which causes the current step in a Visitor to stop processing.
	// It's used to enable a Visitor to handle all processing of a node within itself rather
	// than the Visitor proceeding to any child nodes of that node.
	VisitorStop = errors.New("visitor stop")
)

Functions

func Break

func Break() error

func Continue

func Continue() error

func Error

func Error(pos lexer.Position, err error) error

Error wraps an error with the lexer.Position. If IsError(err) returns true then that error is returned. If err is nil then nil is returned. IsError will return true for a non-nil result from this function.

func Errorf

func Errorf(pos lexer.Position, f string, a ...interface{}) error

Errorf returns an error containing the lexer.Position and the formatted message. IsError with this error will return true.

func IsBreak

func IsBreak(err error) bool

IsBreak returns true if err is from a break instruction being invoked.

func IsContinue

func IsContinue(err error) bool

IsContinue returns true if err is from a continue instruction being invoked.

func IsError

func IsError(err error) bool

IsError returns true if the error is from Errorf or Error functions.

func IsNoFieldErr

func IsNoFieldErr(err error) bool

func IsReturn

func IsReturn(err error) bool

func IsVisitorExit

func IsVisitorExit(err error) bool

IsVisitorExit returns true if err is VisitorExit

func IsVisitorStop

func IsVisitorStop(err error) bool

IsVisitorStop returns true if err is VisitorStop

func NewReturn

func NewReturn(v interface{}) error

func NoField

func NoField(pos lexer.Position, v interface{}, n string) error

Types

type NoFieldError

type NoFieldError struct {
	// contains filtered or unexported fields
}

func GetNoFieldErr

func GetNoFieldErr(err error) (*NoFieldError, bool)

func (*NoFieldError) Error

func (e *NoFieldError) Error() string

func (*NoFieldError) Name

func (e *NoFieldError) Name() string

func (*NoFieldError) Value

func (e *NoFieldError) Value() interface{}

type ReturnError

type ReturnError struct {
	// contains filtered or unexported fields
}

func (*ReturnError) Error

func (r *ReturnError) Error() string

func (*ReturnError) Value

func (r *ReturnError) Value() interface{}