Int-cast floating point expressions as constants?

I recently ran across this problem... My code looks like this.

     #define SomeFloat 0.5
     static const int SomeIntConst = ((int)(SomeFloat + 0.5));

     template<int V>
     struct SomeStruct
     {
     };

     int main()
     {
         SomeStruct<SomeIntConst> ();
         return 0;
     }

When I compile this with ICC, or GCC, or Microsoft Visual C++,
with default settings, it compiles properly.

Even with GCC -ansi, it compiles properly.
However, when I compile it with GCC's -pedantic option, I get
the following error messages:

tmp.cc:11: error: 'SomeIntConst' cannot appear in a constant-expression
tmp.cc:11: error: template argument 1 is invalid

What is the right behavior in this situation for a compiler to do?

-- 
Joel Yliluoma - http://iki.fi/bisqwit/

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