Gabriel Dos Reis - Re: Default arguments and FUNCTION_TYPEs (original) (raw)

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"Giovanni Bajo" giovannibajo@libero.it writes:

| Nathan Sidwell nathan@codesourcery.com wrote: | | >>> In the C++ front end, default arguments are recorded in | >>> FUNCTION_TYPEs intead of being part of the FUNCTION_DECLs. What are | >>> the reasons for that? | >> | >> | >> There used to be an extension that allowed default arguments on | >> function pointer types. We agreed to kill it, although I don't know | >> if it was actually removed. If that's been done, there's no longer | >> any reason. | > | > I took it out the back and shot it. | > | > The obvious place is on the DECL_INITIAL of the PARM_DECLs, but I | > don't think they exist until the function is defined. | | | I heard once that there was some long-term project of storing function | declarations (without corresponding definitions) in a more memory-efficient | memory representation. Moving default parameters within PARM_DECL seems a | little backward in this respect. And if your memory is right, requiring to | build PARM_DECLs just to store default arguments would be even worse.

I don't see why, it is backward -- we still need to build the PARM_DECLs default arguments or not. Anyway, I'm in the middle of coding that suggestion, so I would appreciate a better concrete representation.

-- Gaby

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