m2_reswords.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}
{* 29mar2005}{...}
{cmd:help m2 reswords}
{hline}
{* index reserved words}{...}

{title:Title}

{p 4 4 2}
{hi:[M-2] reswords -- Reserved words}


{title:Syntax}

{p 4 4 2}
Reserved words are

	{cmd}aggregate       enum            numeric         super
	array           explicit        operator        switch
	boolean         export          orgtypedef      template
	break           external        pointer         this
	byte            float           polymorphic     throw
	case            for             pragma          transmorphic
	catch           friend          private         try
	class           function        protected       typedef
	colvector       global          public          typename
	complex         goto            quad            union
	const           if              real            unsigned
	continue        inline          return          using
	default         int             rowvector       vector
	delegate        local           scalar          version
	delete          long            short           virtual
	do              mata            signed          void
	double          matrix          sizeof          volatile
	else            namespace       static          while
	eltypedef       new             string           
	end             NULL            struct{txt}


{title:Description}

{p 4 4 2}
Reserved words are words reserved by the Mata compiler; they may not be 
used to name either variables or functions.


{title:Remarks}

{p 4 4 2}
Remarks are presented under the headings

	{bf:Future developments}
	{bf:Version control}


{title:Future developments}

{p 4 4 2}
Many of the words above are reserved for the future implementation of  
new features.  For instance, the words
{cmd:aggregate},
{cmd:array},
{cmd:boolean},
{cmd:byte},
etc., currently play no role in Mata except that they are reserved.

{p 4 4 2}
You cannot infer much about short-run development plans from the presence or
absence of a word from the list.  The list was constructed by
including words that would be needed in order to add certain
features, but we have erred on the side of reserving too many words because it
is better to give back a word than to take it away later.  Taking away a word
can cause previously written code to break.

{p 4 4 2}
In addition, features can be added without reserving words if the word 
will only be used within a specific context.  Our original list was 
much longer, but then we struck from it such context-specific words.


{title:Version control}

{p 4 4 2}
Even if we should need to reserve new words in the future, you can ensure 
that you need not modify your programs by engaging in version control; 
see {bf:{help m2_version:[M-2] version}}.


{title:Also see}

{p 4 13 2}
Manual:  {hi:[M-2] reswords}

{p 4 13 2}
Online:  help for 
{bf:{help m1_naming:[M-1] naming}};
{bf:{help m2_version:[M-2] version}};
{bf:{help m2_intro:[M-2] intro}}
{p_end}