Passing commas into macros

[Grey Plastic]

How do I pass text that contains a comma into a macro? For example, I
have

#define ATTRIBUTE(name, type) ...

and I want to do

ATTRIBUTE(trans itions, map<int,int>);

However, the last comma is being interpretted as the macro argument
delimiter, and I get the error

macro "ATTRIBUTE" passed 3 arguments, but takes just 2

Help?

[Gianni Mariani]

Re: Passing commas into macros

Grey Plastic wrote:[color=blue]
> How do I pass text that contains a comma into a macro? For example, I
> have
>
> #define ATTRIBUTE(name, type) ...
>
> and I want to do
>
> ATTRIBUTE(trans itions, map<int,int>);[/color]

Try

ATTRIBUTE(trans itions, (map<int,int>))

Or, worst case

typedef map<int,int> map_int_int;
ATTRIBUTE(trans itions, map_int_int)

[color=blue]
>
> However, the last comma is being interpretted as the macro argument
> delimiter, and I get the error
>
> macro "ATTRIBUTE" passed 3 arguments, but takes just 2
>
> Help?[/color]

[Andrey Tarasevich]

Re: Passing commas into macros

Grey Plastic wrote:[color=blue]
> How do I pass text that contains a comma into a macro? For example, I
> have
>
> #define ATTRIBUTE(name, type) ...
>
> and I want to do
>
> ATTRIBUTE(trans itions, map<int,int>);
>
> However, the last comma is being interpretted as the macro argument
> delimiter, and I get the error
>
> macro "ATTRIBUTE" passed 3 arguments, but takes just 2
> ...[/color]

Use typedef-name for the type

typedef map<int,int> TMapIntInt;
ATTRIBUTE(trans itions, TMapIntInt);

--
Best regards,
Andrey Tarasevich

[Derk Gwen]

Re: Passing commas into macros

greyplastic@hot mail.com (Grey Plastic) wrote:
# How do I pass text that contains a comma into a macro? For example, I
# have
#
# #define ATTRIBUTE(name, type) ...
#
# and I want to do
#
# ATTRIBUTE(trans itions, map<int,int>);
#
# However, the last comma is being interpretted as the macro argument
# delimiter, and I get the error

In C, many of these kinds of constructs can be parenthesised
and avoid irritating cpp. If in C++ (map<int,int>) is equivalent to
map<int,int>, then you can use ATTRIBUTE(trans itions, (map<int,int>)) ;

--
Derk Gwen http://derkgwen.250free.com/html/index.html
So....that would make Bethany part black?