common

type Error struct {
	Location Location
	Message  string
}

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

type Location interface {
	Line() int   // 1-based line number within source.
	Column() int // 0-based column number within source.
}

type Source interface {
	// Content returns the source content represented as a string.
	// Examples contents are the single file contents, textbox field,
	// or url parameter.
	Content() string

	// Description gives a brief description of the source.
	// Example descriptions are a file name or ui element.
	Description() string

	// LineOffsets gives the character offsets at which lines occur.
	// The zero-th entry should refer to the break between the first
	// and second line, or EOF if there is only one line of source.
	LineOffsets() []int32

	// LocationOffset translates a Location to an offset.
	// Given the line and column of the Location returns the
	// Location's character offset in the Source, and a bool
	// indicating whether the Location was found.
	LocationOffset(location Location) (int32, bool)

	// OffsetLocation translates a character offset to a Location, or
	// false if the conversion was not feasible.
	OffsetLocation(offset int32) (Location, bool)

	// Snippet returns a line of content and whether the line was found.
	Snippet(line int) (string, bool)

	// IDOffset returns the raw character offset of an expression within
	// the source, or false if the expression cannot be found.
	IDOffset(exprID int64) (int32, bool)

	// IDLocation returns a Location for the given expression id,
	// or false if one cannot be found.  It behaves as the obvious
	// composition of IdOffset() and OffsetLocation().
	IDLocation(exprID int64) (Location, bool)
}

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