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c++c++11sequence-points

Are there any situations where code would have a sequence point in c++11 but not c++03?

Now that the new c++11 standard has made changes in how sequence points are described I'm trying to find out exactly what has been changed between c++03 and c++11.

In particular, are there any situations where code that looks the same would have a sequence point in c++11 but not c++03?

Solution

  • There are no sequence points in C++11, rather there are sequenced before and sequenced after relations.

    Here are some trivial examples wherein behavior differ between C++03 and C++11

    int x = 10;
++++x; // well defined in C++11

int x = 10;
x = ++x +1; //well defined in C++11

    Why? Have a look at this answer and related threads.