position

Documentation

Overview

Package position implements a data structure for storing source code positions.

Index

• type Position
  • func Merge(a, b *Position) *Position
  • func (p Position) String() string

Types

type Position

type Position struct {
	Filename string // Source filename in which this token appears.
	Line     int    // Line in the source for this token.
	Startcol int    // Starting and ending columns in the source for this token.
	Endcol   int
}

A Position is the location in the source program that a token appears. It can specify a single character in the pinput, in which case the start and end columns are the same, or a span of sequential characters on one line.

func Merge

func Merge(a, b *Position) *Position

MergePosition returns the union of two positions such that the result contains both inputs.

func (Position) String

func (p Position) String() string

String formats a position to be useful for printing messages associated with this position, e.g. compiler errors.