Legal to forward declare C standard library entities but not C++ standard library entities?

Legal to forward declare C standard library entities but not C++ standard library entities?

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I wish this help you The problem is that C++ and C are not compatible at the object level... For example it's different to write:
double atof(const char *);
extern "C" {
    double atof(const char *);

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Does IronPython .net based DLL need to be deployed with Python Standard Library if it uses the Standard Library?

Tag : .net , By : Steve M
Date : March 29 2020, 07:55 AM
should help you out you need to deploy the python libraries you're referencing along with your dll. it wont be included statically in there for you.

Which parts of the C standard library are not covered by (the rest of) the C++ standard library?

Tag : cpp , By : adrianmooreuk
Date : March 29 2020, 07:55 AM
wish of those help There aren't that many headers, so lets just list them. Some could be replaced by language facilities, rather than libraries. (I haven't enumerated every function in each header, so I might have missed the odd function that doesn't have a C++ alternative when most of its colleagues do.)
C library         C++ alternatives
assert.h          Exceptions
complex.h         <complex>
ctype.h           None (or maybe <locale>, if you want to jump down that rabbit-hole)
errno.h           None (but only applies to C functions)
fenv.h            None
float.h           <limits>
inttypes.h        (See breakdown)
   formatting     <iostream>
   strto...       <string> (C++11), <sstream>
   imaxabs        std::abs overloads
   imaxdiv        std::div overloads
iso646.h          Language
locale.h          <locale>
math.h            None (extended with C++ overloads)
setjmp.h          Exceptions
signal.h          None
stdarg.h          Variadic templates (C++11)
stdbool.h         Language
stddef.h          None
stdint.h          None
stdio.h           <iostream> etc.
stdlib.h          (See breakdown)
   atof etc.      <sstream>, <string> (C++11)
   rand etc.      <random> (C++11)
   malloc etc.    new, containers
   abort etc.     None
   bsearch etc.   <algorithm>
   abs etc.       None (extended with C++ overloads)
   mb strings     None
string.h          <string>, <algorithm>
tgmath.h          <cmath> (C++ overloads)
time.h            <chrono> (C++11)
wchar.h           <iostream> etc.
wctype.h          None

Forward declare entities in C standard library?

Tag : c , By : ck1
Date : November 23 2020, 01:01 AM
This might help you Forward declarations of structs are always permissible in C. However, not very many types can be used this way. For example, you can't use a forward declaration for FILE simply because the tag name of the struct is not specified (and theoretically, it may not be a struct at all).
Section 7.1.4 paragraph 2 of n1570 gives you permission to do the same with functions:
void *malloc(size_t);
void abort(void);

/* my code here */

Idris: Hiding data types from standard library, or not importing standard library

Tag : development , By : Mariamario
Date : March 29 2020, 07:55 AM
I wish this help you I know there is a way to hide functions from imported libraries, with %hide. But it does not seem to work on data type names, like Nat and Vect. Is there any way to hide data type names, or just not import the standard library? , There are several relevant command-line options:
$ man idris
   --nobasepkgs             Do not use the given base package
   --noprelude              Do not use the given prelude
   --nobuiltins             Do not use the builtin functions
$ idris
Idris> :t Nat
Nat : Type

$ idris --noprelude
Idris> :t Nat
No such variable Nat

Is there a standard library way to convert text to HTML entities in Python 2.7?

Tag : python , By : ganok_tor
Date : March 29 2020, 07:55 AM
will be helpful for those in need The library xml.sax.saxutils is standard and can escape and unescape xml in Python 2.7
from xml.sax.saxutils import escape, unescape

mystr = escape('x < 7 && I like math && y > 7')
# x &lt; 7 &amp;&amp; I like math &amp;&amp; y &gt; 7
# x < 7 && I like math && y > 7
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