peek            bool
	peekToken       ScanToken
	peekText        string
}

// NewInput returns an Input from the given path.
func NewInput(name string) *Input {
	return &Input{
		// include directories: look in source dir, then -I directories.
		includes:        append([]string{filepath.Dir(name)}, flags.I...),
		beginningOfLine: true,
		macros:          predefine(flags.D),
	}
}