[omniORB] BUG: macro expansion problem

[Gary D. Duzan]

   From looking at the platform file for Sun it see by default to use
/usr/ccs/lib/cpp as the preprocessor. Try running your IDL through that
and see if it doesn't come up with the same thing as "omniidl2 -E". If
so, try changing the definition of CPP in your platform file to "CC" or
"CC -E" and rebuilding omniidl2.

					Gary Duzan
					GTE Laboratories



In Message <14130.60337.115007.311012@prodigy.anvil.co.uk> ,
   Alex Hornby <alex@anvil.co.uk> wrote:

=>Colin Caughie writes:
=> > > -----Original Message-----
=> > > From: Alex Hornby [mailto:alex@anvil.co.uk]
=> > > Sent: Friday, 7 May 1999 12:47
=> > > To: omniorb-list@uk.research.att.com
=> > > Subject: [omniORB] BUG: macro expansion problem
=> > > 
=> > > 
=> > > Dear all,
=> > > 
=> > > Macro expansion is not being done properly, as the ## is left in.
=> > > I know macros are nasty, but one of our developers is very 
=> > > attached to 
=> > > them.
=> > > 
=> > > ...
=> > >
=> > > #define EV_TAG(tag) \
=> > > 	struct evtag_ ## tag { \
=> > > 		tag value; \
=> > > 		string errortext; \
=> > > 	}
=> > 
=> > 
=> > Have you tried removing the spaces on either side of the ##?
=> > 
=> > Just a thought,
=> > 
=> > Colin Caughie (A macro fan!)
=>
=>Yes, it makes little difference:
=>
=>Cheers,
=>Alex.
=>
=>-- Modified IDL
=>#pragma prefix "anvil.co.uk"
=>
=>#define EV_TAG(tag) \
=>	struct evtag_##tag { \
=>		tag value; \
=>		string errortext; \
=>	}
=>
=>module example {
=>    EV_TAG(short);
=>    EV_TAG(string);
=>    EV_TAG(long);
=>    EV_TAG(float);
=>    EV_TAG(double);
=>    EV_TAG(Date);
=>    EV_TAG(DateTime);
=>    EV_TAG(Currency);
=>    EV_TAG(Instrument);
=>    EV_TAG(Agency);
=>    EV_TAG(Counterparty);
=>    EV_TAG(Book);
=>};
=>
=>-- omniidl2 output
=># 1 "/tmp/idli_0gcSQZ.cc" 
=>#pragma prefix "anvil.co.uk"
=>
=>
=>
=>
=>
=>
=>
=>module example {
=>    struct evtag_##short { short value; string errortext; };
=>    struct evtag_##string { string value; string errortext; };
=>    struct evtag_##long { long value; string errortext; };
=>    struct evtag_##float { float value; string errortext; };
=>    struct evtag_##double { double value; string errortext; };
=>    struct evtag_##Date { Date value; string errortext; };
=>    struct evtag_##DateTime { DateTime value; string errortext; };
=>    struct evtag_##Currency { Currency value; string errortext; };
=>    struct evtag_##Instrument { Instrument value; string errortext; };
=>    struct evtag_##Agency { Agency value; string errortext; };
=>    struct evtag_##Counterparty { Counterparty value; string errortext; };
=>    struct evtag_##Book { Book value; string errortext; };
=>};
=>
=>-- output of cc -E
=>#pragma	prefix "anvil.co.uk"
=># 2 "macro_probem.idl"
=>
=># 8
=>
=>module example {
=>     struct evtag_short { short value ; string errortext ; };
=>     struct evtag_string { string value ; string errortext ; };
=>     struct evtag_long { long value ; string errortext ; };
=>     struct evtag_float { float value ; string errortext ; };
=>     struct evtag_double { double value ; string errortext ; };
=>     struct evtag_Date { Date value ; string errortext ; };
=>     struct evtag_DateTime { DateTime value ; string errortext ; };
=>     struct evtag_Currency { Currency value ; string errortext ; };
=>     struct evtag_Instrument { Instrument value ; string errortext ; };
=>     struct evtag_Agency { Agency value ; string errortext ; };
=>     struct evtag_Counterparty { Counterparty value ; string errortext ; };
=>     struct evtag_Book { Book value ; string errortext ; };
=>};
=>#ident "acomp: WorkShop Compilers 4.2 30 Oct 1996 C 4.2"
=>