Re: "Linus Torvalds Was (Sorta) Wrong About C++"

From:
Melzzzzz <mel@zzzzz.com>
Newsgroups:
comp.lang.c++
Date:
Thu, 12 Mar 2015 23:09:10 +0100
Message-ID:
<20150312230910.18111497@maxa-pc>
On Thu, 12 Mar 2015 23:02:24 +0100
Johannes Bauer <dfnsonfsduifb@gmx.de> wrote:

On 12.03.2015 22:24, Paavo Helde wrote:

Which errors do you have in mind that C doesn't catch at compile
time but C++ does?


Are you kidding?


LOL, no but with your examples I'm sure YOU are kidding:

int n = 100;
long* p = malloc(n);
p[n-1] = 42;


std::vector<int> x;
x.push_back(123);
std::cerr << x[-1] << std::endl;

Totally caught at compile time *cough* NOT

enum a { a1, a2 };
enum b { b1, b2 };
void g(enum b arg) {}

g(a1);


Yup, that one is legit. It was also the example I explicitly gave.

// a.h
void foo(int x);

// a.c
// not including a.h
void foo(long x) {}

// main.c
#include "a.h"
foo(42);

ok, the latter is a linker error in C++, not compile time, but
still much better than a random error on random architecture


Oh, that is indeed neat! Nice.


return type would not be caught by linker... c++ mangles function
names by parameter, but not by return type...

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