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Re: Problems with PR 21210


Gabriel Dos Reis wrote:
Mark Mitchell <mark@codesourcery.com> writes:

| PR 21210 is a complaint that G++ 4.0 has stopped allowing conversions
| from integers to "__complex__ float".  This is a perfectly reasonable

My reading of the PR is a bit different, especially comment #1

  typedef float __complex__ fcomplex;
  fcomplex cplx = fcomplex();

which effectively produces the error

21210.C:2: error: invalid cast from type 'int' to type 'float __complex__'

which is at least disturbing, because there is not cast and no int
here. Rather, there is a default value fcomplex() being requested and
copied into another fcomplex. There is no conversion requested. That
appears to me to be entirely isolated from the std::complex<> thingy.
Why is that observation flawed?

Because the "T()" syntax means zero-initialization for builtin types. You will get the same error message if you write "fcomplex(3)".


--
Mark Mitchell
CodeSourcery, LLC
mark@codesourcery.com
(916) 791-8304


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