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From: Keith Thompson <Keith.S.Thompson+u@gmail.com>
Newsgroups: comp.lang.c++
Subject: Re: C++ variable names
Date: Thu, 16 Jan 2020 00:15:09 -0800
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T <T@invalid.invalid> writes:
[...]
> This got it?
>
> C           C++
> float_t     std::float_t
> double_t    std::double_t

float_t and double_t are fairly obscure types defined in <math.h>
in C, and in <cmath> or <math.h> in C++.  float_t is at least as
wide as float, and might be wider and faster; similarly for double_t.
(For example, float_t might be defined as double if double operations
are faster than float operations.)  See the C standard (I think
you have N1570) section 7.12.  I don't know that there would be
any reason to refer to them in Raku.

The predefined floating-point types in both C and C++ are float,
double, and long double.

I'm really not sure what this whole discussion is about.  The types
in the standard library have names defined by the standard library
as specified in the language standard.  You just use those names.
It doesn't make sense to talk about changing them.

If you weren't aware, most of the C standard library headers
are incorporated into the C++ standard library.  Each <foo.h>
C header is available in C++ as <cfoo>, with the declarations in
the std:: namespace.  With very few exceptions, they're the same.
Any decent C++ reference should explain all this.

No offense, but I get the feeling that you have some fundamental
misconception that led you to think that, for example, referring to
int32_t as int32 might make some kind of sense.

Hopefully this means you won't have to post a new question about
size_t and ptrdiff_t, since the answers will be exactly the same.

-- 
Keith Thompson (The_Other_Keith) Keith.S.Thompson+u@gmail.com
    [Note updated email address]
Working, but not speaking, for Philips Healthcare
void Void(void) { Void(); } /* The recursive call of the void */