[cfe-dev] extend C syntax in clang plug-in?

[Sean Silva]

On Mon, Nov 17, 2014 at 7:48 PM, Sean Silva <chisophugis at gmail.com> wrote:

>
>
> On Mon, Nov 17, 2014 at 7:00 PM, hongborong <hongbo.rong at intel.com> wrote:
>
>> I want to experiment with some syntax extensions to C, including some new
>> built-in types and new statements. Can it be done completely in a plugin?
>>
>
> No. Currently clang's plugin functionality is very limited.
>

Sorry, I should have added a link to what you *can* do:
http://clang.llvm.org/docs/ClangPlugins.html

Basically you can run a FrontendAction which operates on the AST that
clang's parser generates.

-- Sean Silva


>
> -- Sean Silva
>
>
>> Any related examples to look at?
>>
>> For an extremely simple example, let us say we have
>>         int A;
>>         A, B = 1, [1.0, 2.0];
>> Here B is untyped, and [1.0, 2.0] is not an expected expression. Instead
>> of
>> throwing errors, can we write a clang plugin to do the following? (1)
>> Pre-process the token stream. For example, the second statement can be
>> broken into two statements: A=1; B=[1.0, 2.0]; That gives us a new token
>> stream. (2) Parse. For the statement “B=[1.0, 2.0]”, build a customized
>> AST
>> node, and insert it to the function’s AST. (3) Some additional analysis
>> may
>> be done on the function’s AST. (4) Finally, transform the function's AST
>> so
>> that it completely conforms to standard C.
>>
>> Thanks,
>> Hongbo
>>
>>
>>
>> --
>> View this message in context:
>> http://clang-developers.42468.n3.nabble.com/extend-C-syntax-in-clang-plug-in-tp4042499.html
>> Sent from the Clang Developers mailing list archive at Nabble.com.
>>
>> _______________________________________________
>> cfe-dev mailing list
>> cfe-dev at cs.uiuc.edu
>> http://lists.cs.uiuc.edu/mailman/listinfo/cfe-dev
>>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/cfe-dev/attachments/20141117/55c9ac26/attachment.html>