[LLVMdev] one question about up reference

[aqex]

Chris Lattner,您好！

	I see ,
	Thank you very much !

======= 2005-06-06 23:39:20 您在来信中写道：=======

>On Mon, 6 Jun 2005, aqex wrote:
>> hi,
>> I have one question about up reference, why use \nested_level_count in type description.
>> and have to handle it in HandleUpRefs() (AsmParser/llvmAsmParser.y)  ,
>>
>> why not just insert type name and return in calcTypeName() (AsmWriter.cpp) ;
>>
>> As you mention in "How to build recursively type" ,
>>
>> %mylist = type { %mylist*, int }  is accepted .
>>
>> Is it neccessary to use \nested_level_count ?
>>
>> I'm very thankful if you can give me some C code example to show it .
>
>Upreferences are used when the symbol table is stripped.  The above type 
>can be written like this without a name:
>
>  {\2*, int}
>
>This is important because LLVM does not require every type to have a name, 
>but I wouldn't recommend language front-ends to generate these.
>
>-Chris
>
>-- 
>http://nondot.org/sabre/
>http://llvm.cs.uiuc.edu/
>
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　　　　　　　　致
礼！
 
				 
　　　　　　　　aqex
　　　　　　　　aqex at bsv.com.cn
　　　　　　　　　　2005-06-07