how static_cast and dynamic_cast implemented?

[Yuming Ma]

all,

curious what's the implementation and compiling details of these two and
other C++ cast operators such as const_cast and reinterpret_cast...they
look like templated class with constructor checking the typeid of the
input object and return the target object...

thanks,

yuming,

[Jeff Schwab]

Yuming Ma wrote:

curious what's the implementation and compiling details of these two and
other C++ cast operators such as const_cast and reinterpret_cast...they
look like templated class with constructor checking the typeid of the
input object and return the target object...

No, they're done at compile-time, not run-time. Since they're built
into the language, they're not actually templated classes. However, I
wouldn't think they'd be hard to implement as function templates with
constraints. I wonder, why weren't they made library elements? Hm...