[dale_glass]

What's wrong with constexpr?

[pmarin]

Its a crippled form of code generator in an era where compile time execution is suported by many modern system languages.

But I don't like any of them. I prefer to write my own code generators.

[klodolph]

C doesn't have that version of constexpr. In C2x, constexpr is just a way to define constants, like

  constexpr unsigned long long kMyBigNum = 0x1234123412341234ull;

Previously, you had to #define. Using enum causes problems when it doesn't fit in an int. And const doesn't mean the right thing:

  const int kArraySize = 5;

  void MyFunction(void) {
    int array[kArraySize]; // NO!
  }

The above function will work if you have VLAs enabled, or if your compiler specifically allows for it. It's nice to have a standardized version that works everywhere (VLAs don't work everywhere).

[flohofwoe]

Constexpr in C is essentially what const should have been, it's not as "powerful" as the C++ version.