New Macro Syntax Proposal

[Davidl]

and my idea is eventually get the compiler's associate array out not  
built-in by using a
macro Language INI file instead. In the ini file, the macro is the  
language feature.

> Obviously the one I posted yesterday is not easy for IDE to highlight  
> sub-language set
> and also it lacks the power of parse different sub-language expressions.  
> I think the
> goal of macro should be powerful enough to introduce a new sub language.  
> Then the macro
> itself could be called mature.
> Consider the following
>
> macro MyPowerfulMacro = CODEGEN //indicate the backend gen code output  
> string
> {
> KeyWordList(CASE_INSENSITIVE)	// this is for IDE highlight
> //the design here doesn't pollute keyword we have now, KeyWordList,  
> Expression Backend all only take effect in macro expression
> {
>     object, TOKEN.object,
>     end,    TOKEN.end,
> }
> Expression
> {
>     expdeclare ::= EXP.expdeclare(objid, objattr[])
> 	TOKEN.object {( TOKEN.identifier:objid TOKEN.identifier:~objattr  
> TOKEN.colon TOKEN.object)
> 		| (EXP.expdeclare:objexp)  } TOKEN.end
> }
>
> Backend EXP.expdeclare(objid, objattr[])
> {
> 	CODEGEN ~= class "~objid.strinof)~"{;
> 	foreach(k;objattr)
> 	{
> 		CODEGEN ~= "class "~k.stringof~"{}"
> 	}
> 	CODEGEN ~= "}"
> }
>
> }