errors

Documentation

Index

• func PrintError(w io.Writer, err error)
• type Error
  • func (e Error) Error() string
• type ErrorList
  • func (p *ErrorList) Add(pos loc.Position, msg string)
  • func (p ErrorList) Err() error
  • func (p ErrorList) Error() string
  • func (p ErrorList) Len() int
  • func (p ErrorList) Less(i, j int) bool
  • func (p *ErrorList) List() []*Error
  • func (p *ErrorList) RemoveMultiples()
  • func (p *ErrorList) Reset()
  • func (p ErrorList) Sort()
  • func (p ErrorList) Swap(i, j int)

Functions

func PrintError

func PrintError(w io.Writer, err error)

PrintError is a utility function that prints a list of errors to w, one error per line, if the err parameter is an ErrorList. Otherwise it prints the err string.

Types

type Error

type Error struct {
	Pos loc.Position
	Msg string
}

In an ErrorList, an error is represented by an *Error. The position Pos, if valid, points to the beginning of the offending token, and the error condition is described by Msg.

func (Error) Error

func (e Error) Error() string

Error implements the error interface.

type ErrorList

type ErrorList []*Error

ErrorList is a list of *Errors. The zero value for an ErrorList is an empty ErrorList ready to use.

func (*ErrorList) Add

func (p *ErrorList) Add(pos loc.Position, msg string)

Add adds an Error with given position and error message to an ErrorList.

func (ErrorList) Err

func (p ErrorList) Err() error

Err returns an error equivalent to this error list. If the list is empty, Err returns nil.

func (ErrorList) Error

func (p ErrorList) Error() string

An ErrorList implements the error interface.

func (ErrorList) Len

func (p ErrorList) Len() int

ErrorList implements the sort Interface.

func (ErrorList) Less

func (p ErrorList) Less(i, j int) bool

func (*ErrorList) List

func (p *ErrorList) List() []*Error

func (*ErrorList) RemoveMultiples

func (p *ErrorList) RemoveMultiples()

RemoveMultiples sorts an ErrorList and removes all but the first error per line.

func (*ErrorList) Reset

func (p *ErrorList) Reset()

Reset resets an ErrorList to no errors.

func (ErrorList) Sort

func (p ErrorList) Sort()

Sort sorts an ErrorList. *Error entries are sorted by position, other errors are sorted by error message, and before any *Error entry.

func (ErrorList) Swap

func (p ErrorList) Swap(i, j int)