input

type BytePosition int

type Position struct {
	// LineNumber is the 0-indexed line number.
	LineNumber int

	// ColumnPosition is the 0-indexed column position on the line.
	ColumnPosition int
}

type PositionMapper interface {
	// RunePositionToLineAndCol converts the given 0-indexed rune position under the given source file
	// into a 0-indexed line number and column position.
	RunePositionToLineAndCol(runePosition int, path Source) (int, int, error)

	// LineAndColToRunePosition converts the given 0-indexed line number and column position under the
	// given source file into a 0-indexed rune position.
	LineAndColToRunePosition(lineNumber int, colPosition int, path Source) (int, error)

	// TextForLine returns the text for the specified line number.
	TextForLine(lineNumber int, path Source) (string, error)
}

type Source string

type SourcePosition interface {
	// Source is the input source for this position.
	Source() Source

	// RunePosition returns the 0-indexed rune position in the source file.
	RunePosition() (int, error)

	// LineAndColumn returns the 0-indexed line number and column position in the source file.
	LineAndColumn() (int, int, error)

	// LineText returns the text of the line for this position.
	LineText() (string, error)

	// String returns a (somewhat) human-readable form of the position.
	String() string
}

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

type SourceRange interface {
	// Source is the input source for this range.
	Source() Source

	// Start is the starting position of the source range.
	Start() SourcePosition

	// End is the ending position (inclusive) of the source range. If the same as the Start,
	// this range represents a single position.
	End() SourcePosition

	// ContainsPosition returns true if the given range contains the given position.
	ContainsPosition(position SourcePosition) (bool, error)

	// AtStartPosition returns a SourceRange located only at the starting position of this range.
	AtStartPosition() SourceRange

	// String returns a (somewhat) human-readable form of the range.
	String() string
}