Duplicate reports 3830, 4556 and 3747.

[Jan van Dijk]

[Please CC me, thanks]

	Hi there,

Somebody with GNATS write access should mark two of the PR's 3830, 4556
and 3747 as duplicates. They describe the same bug: gcc versions >= 3.0
refuse to compile the following correct code:

struct MyString
{
        char operator[](unsigned) const;
        operator const char*() const;
};
 
int main()
{
        MyString s;
        char c1 = s[0u]; // OK
        char c2 = s[0];  // <=====
        return 0;
};

The line <===== results in the error message:

test.cpp: In function `int main()':
test.cpp:11: choosing `char MyString::operator[](unsigned int) const'
over `
   operator[]'
test.cpp:11:   because worst conversion for the former is better than
worst
   conversion for the latter