CPP1111 — Fixed type mapping should provide (explicit) operator bool

Given the specification of the class template Fixed provides

operator int64_t () const;
operator long double() const;

and

bool operator!() const;

This allows to test some Fixed instantiation within a boolean context as in a useful way as follows:

typedef IDL::Fixed<5,2> F;
F f = ...;
if (!f)

will cause an ambiguity error between the two conversion functions to int64_t and long double. User code is required to write the obfuscated form

if (!!f)

to realize the same thing. This is unfortunate and there is a simple means to solve this problem: The specification should add

explicit operator bool() const;

to the class template synopsis with the same semantics as negating operator!

Accepting this issue as proposed. Also during the discussion it was proposed to add a
namespace level to_string