fastformat | 易学教程

Is there a 'catch' with FastFormat?

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问题 I just read about the FastFormat C++ i/o formatting library, and it seems too good to be true: Faster even than printf, typesafe, and with what I consider a pleasing interface: // prints: "This formats the remaining arguments based on their order - in this case we put 1 before zero, followed by 1 again" fastformat::fmt(std::cout, "This formats the remaining arguments based on their order - in this case we put {1} before {0}, followed by {1} again", "zero", 1); // prints: "This writes each

FastFormat on OS X

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问题 After reading a little about FastFormat, I decided to download and install it on my Macbook Pro, running OS X 10.8. I successfully got FastFormat to build, and ran the performance tests. Then I wrote a small test to check whether it works: #include <cstdlib> #include <fastformat/fastformat.hpp> #include <fastformat/sinks/ostream.hpp> int main() { return EXIT_SUCCESS; } Upon compiling it with g++-4.7 (and making sure that all the include paths were correct), I got compile-time errors, such as

Do C++ formatting libraries generally fall back to *sprintf for numeric formatting?

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问题 I am wondering whether "all" C++ formatting libraries eventually fall back to a *sprintf function to format numbers. I am asking this because: Looking at the iostreams library that comes with Visual C++, I can see that numbers input into a stream will eventuall be formatted with sprintf_s . Boost.Format just uses the available iostreams library as far as I can tell. FastFormat eventually uses vsprintf to format a number. So, are there iostreams implementations that do not use *sprintf and do

Do C++ formatting libraries generally fall back to *sprintf for numeric formatting?

阅读更多关于 Do C++ formatting libraries generally fall back to *sprintf for numeric formatting?

I am wondering whether "all" C++ formatting libraries eventually fall back to a *sprintf function to format numbers. I am asking this because: Looking at the iostreams library that comes with Visual C++, I can see that numbers input into a stream will eventuall be formatted with sprintf_s . Boost.Format just uses the available iostreams library as far as I can tell. FastFormat eventually uses vsprintf to format a number. So, are there iostreams implementations that do not use *sprintf and do the formatting themselves? Are there other formatting libraries that do not forward formatting of