Compile time regular expression in C++
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Compile time regular expression in C++
1–10 of 30 posts
Re: Compile time regular expression in C++
#2Hopefully the standard regex will be constexpr soon.
Re: Compile time regular expression in C++
#3Hopefully the standard regex will be constexpr soon.
Not to mention, like... trig functions. I know std::cos et al. need to set errno. Maybe cppfront will get rid of it.
Re: Compile time regular expression in C++
#4This has been a part of the dlang standard library for some time: https://dlang.org/phobos/std_regex.html
Re: Compile time regular expression in C++
#5Hopefully the standard regex will be constexpr soon.
Not to mention, like... trig functions. I know std::cos et al. need to set errno. Maybe cppfront will get rid of it.
Compile with -fno-math-errno. Almost nobody checks errno for math functions, and disabling it can give a huge speedup.
Re: Compile time regular expression in C++
#6Earlier quoted context omitted.
Not to mention, like... trig functions. I know std::cos et al. need to set errno. Maybe cppfront will get rid of it.
Compile with -fno-math-errno. Almost nobody checks errno for math functions, and disabling it can give a huge speedup.
That sets the cmath functions constexpr??
Re: Compile time regular expression in C++
#7Re: Compile time regular expression in C++
#8I'd love for someone to add this to rebar[1] so that we can get a good sense of how well it does against other general purpose regex engines. It will be a little tricky to add (since the build step will require emitting a C++ program and compiling it), but it should be possible.
Re: Compile time regular expression in C++
#9Hopefully the standard regex will be constexpr soon.
Not to mention, like... trig functions. I know std::cos et al. need to set errno. Maybe cppfront will get rid of it.
Isn’t the issue with functions like this that they are not guaranteed to be the same on all hardware? So making it constexpr could break programs or cause the constexpr evaluated result to differ from the runtime result even for the same inputs
Re: Compile time regular expression in C++
#10Hopefully the standard regex will be constexpr soon.
Not to mention, like... trig functions. I know std::cos et al. need to set errno. Maybe cppfront will get rid of it.
What does cppfront have to do with it? You can write/download/import/enable constexpr implementations of cos with standard c++ compilers?
That’s like saying you can’t drive during winter with your car because it came with summer tires... just change your tires?