Tweet

The Grinch Who Gave Back Cursed Code

19 Sep, 4 tweets, 2 min read

💯 Cursed code

Same code compiles in both C and C++ and can detect which version of C and C++ with language features alone.

With not be taking questions.

#cplusplus
#programming

I have added this to my github "determine_c_or_cpp" repo: github.com/shafik/determi…

Enjoy!

https://twitter.com/shafikyaghmour/status/1432803271400247296?s=20

Since folks like this you may also like:

https://twitter.com/shafikyaghmour/status/1432803271400247296?s=20

I feel compelled by some of the comments in quote tweets of this, to point out this should not be used in production.

We have standard macros for detecting C and C++ versions. Please use those: godbolt.org/z/c7P1EEq95

OTOH for IOCCC entries use this.

• • •

Missing some Tweet in this thread? You can try to force a refresh

This Thread may be Removed Anytime!

Twitter may remove this content at anytime! Save it as PDF for later use!

More from @shafikyaghmour

The Grinch Who Gave Back Cursed Code

@shafikyaghmour

18 Sep 20

@code_report

Structure and Interpretation of Computer Programs: SICP
By @code_report

Why SICP matters?

#CppCon
#Cplusplus

@code_report

@code_report Pascal is for building pyramids

Lisp is for building organisms

@code_report

@code_report "We write awful code"

Read 4 tweets

The Grinch Who Gave Back Cursed Code

@shafikyaghmour

31 May 19

Let’s do this:

One Like, One Undefined Behavior.

I plan on running this through the weekend at least.

#Cplusplus
#Programming

Signed integer overflow/underflow is undefined behavior

int x1=std::numeric_limits<int>::max()+1;
int x2=std::numeric_limits<int>::min()-1;

[expr.pre]p4 eel.is/c++draft/expr#…

godbolt: godbolt.org/z/Ga-fbb

#2 Signed integer overflow/underflow is undefined behavior 2

int x3=std::numeric_limits<int>::min() / -1;

[expr.pre]p4 eel.is/c++draft/expr#…

godbolt: godbolt.org/z/ytC8oi

Read 65 tweets

Share this page!

The Grinch Who Gave Back Cursed Code

Try unrolling a thread yourself!

More from @shafikyaghmour

The Grinch Who Gave Back Cursed Code

The Grinch Who Gave Back Cursed Code

Did Thread Reader help you today?

Like this author's thread?