How does std :: uncaught_exception work?

Question

Introduction

There are reports and articles about use and rationality std::uncaught_exception.

The functionality provided by this function boils down to

std :: uncaught_exception detects that the stack is currently unwinding.

Q

When looking for its definition, all I see is a DLL call

_CRTIMP2_PURE bool __CLRCALL_PURE_OR_CDECL uncaught_exception();

How can this level of introspection be achieved in a program? Is this something feasible with simple C ++ or compiler / assembly magic that should come into play?

Answer 1

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Answer 2

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