Compiler support of GNU Statement Expression

Question

Which modern compilers support the Gnu Statement expression (C and C++ languages). What versions should I have to use a statement expressions?

Statement expression i

Answer 1

As said in the comment of my previous answer, the Intel Compiler does support the statement expressions. But the emulation by Intel of that GNU extension is not complete, in C++. The following code is taken from CGAL-4.0 (http://www.cgal.org/):

#include <cassert>

struct A {
  int* p;

  A(int i) : p(new int(i)) {}
  ~A() { delete p; }
  int value() const { return *p;}
};

int main()
{
  int i = __extension__ ({ int j = 2; j+j; });
  assert(i == 4);

  // The Intel Compiler complains with the following error:
  // "error: destructible entities are not allowed inside of a statement
  // expression"
  // See http://software.intel.com/en-us/articles/cdiag1487/
  i = __extension__ ({ A a(2); A b(3); a.value() + b.value(); });

  assert(i == 5);
  return 0;
}

A comment in the code even give the error returned by the Intel Compiler, tested with version 11, 12, or 13.

http://software.intel.com/en-us/articles/cdiag1487/

Answer 2

The Intel C++ Compiler does not support statement expressions, even the last version that I know, version 13.0.

Answer 3

The PathScale® EKOPath Compiler Suite

It support gnu99 with "−std=gnu99"