ostream problem...

my code requirement is that a string between two macros is to be displayed at the console. Like this:

Code:

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TRACE << "hello world" << ENDTRACE;

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Question is: how should the two MACROS be defined.

I am thinking of TRACE expanding to a static ostream object whose inserter can be overloaded to display the string at the console. What do you think?

Any ideas would be helpful.

TIA

Code:

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#include <iostream.h>

#define TRACE cout
#define ENDTRACE endl

int main(void)
{
    TRACE << "hello world" << ENDTRACE;
}

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It's a bit poor really, but it works.

well, for the given problem that's probably the simplest and best solution.

But I didn't specify the problem in detail :D The reason I said console was because that was what I was trying to do in a test program.

Ok, so the problem is: I need to invoke a method passing on the string between the two MARCOS. Something like:

Code:

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TRACE << "The number is: " << some_method_returning_int() << ENDTRACE;

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if some_method_returning_int() returned: 5, the effect of macro expansion should be:

Code:

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someObj::trace_to_correct_channel( "The number is: 5" );

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A solution to your problem would be:

Code:

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#define TRACE {stringstream __a;__a
#define ENDTRACE "";someObj::trace_to_correct_channel(__a.str().c_str());}

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I do not recommend use of macros like this, though.

(Edit) Don't forget to #include <sstream>