Parsing Error templated constexpr member variable

Description:

When intializing a static constexpr class member variable using a brace-enclosed expression, compilation fails with error "expected a ")"".

Affected Versions:

icpc (ICC) 19.1.0.166 20191121

Minimal example:

class Test
{
template< typename Foo >
static constexpr bool UseSMPAssign_v =  (true) ;
};

int main(int argc, char** argv)
{
    return 0;
}

Expected Result:

Minimal example compiles without errors

Actual Result:

Compilation Fails with

testmain2.cpp(4): error: expected a ")"
  static constexpr bool UseSMPAssign_v =  (true) ;
                                                 ^

compilation aborted for testmain2.cpp (code 2)

Other Compilers:

GCC 8.3 and 9.2 are compiling the example

Note:

Omitting the Braces fixes the issue, but syntactically there should be nothing wrong adding them.