go/src/cmd/compile/internal/syntax/source.go

type source …

const sentinel …

func (s *source) init(in io.Reader, errh func(line, col uint, msg string)) { … }

const linebase …

const colbase …

// pos returns the (line, col) source position of s.ch.
func (s *source) pos() (line, col uint) { … }

// error reports the error msg at source position s.pos().
func (s *source) error(msg string) { … }

// start starts a new active source segment (including s.ch).
// As long as stop has not been called, the active segment's
// bytes (excluding s.ch) may be retrieved by calling segment.
func (s *source) start()          { … }

func (s *source) stop()           { … }

func (s *source) segment() []byte { … }

// rewind rewinds the scanner's read position and character s.ch
// to the start of the currently active segment, which must not
// contain any newlines (otherwise position information will be
// incorrect). Currently, rewind is only needed for handling the
// source sequence ".."; it must not be called outside an active
// segment.
func (s *source) rewind() { … }

func (s *source) nextch() { … }

// fill reads more source bytes into s.buf.
// It returns with at least one more byte in the buffer, or with s.ioerr != nil.
func (s *source) fill() { … }

// nextSize returns the next bigger size for a buffer of a given size.
func nextSize(size int) int { … }