Re: [cdt-dev] how to extend scanner - CPreProcessor

["Peter Watkins" <peter.watkins@xxxxxxxxxxxxx>]

I have the same question as Swapna. In
my case, the compiler I'm writing a language extension for specifies inline
assembly as follows:

#pragma asm
// Assembly goes here
#pragma endasm

Or alternately:

#asm
// Assembly goes here
#endasm

Both cases require not only new keywords
in the preprocessor but modifications to the state machine as well (correct
me if I'm mistaken).

Thanks,

Peter



From:      
 Swapna Pawar <Swapna.Pawar@xxxxxxxx>
To:      
 "cdt-dev@xxxxxxxxxxx"
<cdt-dev@xxxxxxxxxxx>, 
Date:      
 01/02/2014 03:54 AM
Subject:    
   [cdt-dev] how
to extend scanner - CPreProcessor
Sent by:    
   cdt-dev-bounces@xxxxxxxxxxx

---

Hi,
 
I need to add the customized token.
For example, 
 
#pragma custom_token
static int func(int a, int b){
ADD R2,R1 ; Assembly-language description
}
 
Similar bug is logged:
 
https://bugs.eclipse.org/bugs/show_bug.cgi?id=275335
 
However, my requirement is to support
above syntax. No syntax error should be displayed for the above snippet.

 
This can be achieved by over-riding
the executeDirective() method from org.eclipse.cdt.internal.core.parser.scanner
> CPreprocessor.
However, ‘CPreprocessor’ is not
extendible and the required methods are invisible.
 
Please suggest on how we can extend
‘CPreprocessor’ for supporting the required syntax.
 
Any help is greatly appreciated.
 
Regards,
Swapna

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