opts_exclusive.hlp

是一个经济学管理应用软件 很难找的 但是经济学学生又必须用到

{smcl}
{* 10mar2005}{...}
{cmd:help opts_exclusive}{right:also see:  {help undocumented}}
{hline}

{title:Title}

{p 4 24 2}
{hi:opts_exclusive} {hline 2} Programmer's utility for mutually exclusive
options


{title:Syntax}

{p 8 23 2}
{cmd:opts_exclusive} {cmd:"}{it:opts}{cmd:"}
[[{it:option_name}] {it:return_code}]


{title:Description}

{pstd}
{cmd:opts_exclusive} is a programmer's command for displaying an appropriate
message and return code when mutually exclusive options are encountered.
{it:opts} is the list of mutually exclusive options or suboptions.  If there
are less than two options listed in {it:opts}, {cmd:opts_exclusive} silently
exits with a 0 return code.  With more than 2 options in {it:opts}, an error
message is displayed and the return code set.  In the case of suboptions,
{it:option_name} indicates the option name.  The default return code is 198.
{it:return_code} specifies a different return code.


{title:Examples}

    {cmd:. opts_exclusive "a b" myopt}
{p 4 4 2}
    {err:option myopt() invalid; only one of a or b are allowed}
{p_end}
    {search r(198):r(198);}

    {cmd:. opts_exclusive "this that other" xyz 274}
{p 4 4 2}
    {err:option xyz() invalid; only one of this, that, or other are allowed}
{p_end}
    {search r(274):r(274);}

    {cmd:. opts_exclusive "green yellow red blue"}
{p 4 4 2}
    {err:only one of green, yellow, red, or blue are allowed}
{p_end}
    {search r(198):r(198);}


{title:Also see}

{psee}
Online:  {helpb error}, {helpb exit}
{p_end}