CODEWITHSUNDEEP
c++optimizationrecursiontail
Squall Leonhart
Squall Leonhart

Reputation: 81

About Tail recursive optimization

I used the below two functions to test the Tail recursive optimization under MSVC08

int TailRecursively1(int i)
{
  return TailRecursively1(i);
}

int TailRecursively2(std::string str)
{
  return TailRecursively2(str);
}

why has TailRecursively1 been optimized, but TailRecursively2 has caused the stack overflow?

Upvotes: 5

Views: 150

Answers (1)

tohava
tohava

Reputation: 5412

Because there are calls for std::string copy constructor and destructor when sending the str parameter by value to TailReucrsively2?

(I'm not 100% sure about this)

Upvotes: 5

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