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gustedt.wordpress.com | ||
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quuxplusone.github.io
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| | | | | Someone on the cpplang Slack asks: How can I view a std::pair<T, T> as if it were a range of two Ts? That is, fill in the blank in this sample program: template<std::ranges::range R> void increment_all(R&& rg) { for (auto&& elt : rg) { elt = elt + 1; } } template<class T> auto F(std::pair<T, T>& kv) { ~~~~ } int main() { std::pair<int, int> kv = {1, 2}; increment_all(F(kv)); assert(kv.first == 2 && kv.second == 3); std::ranges::fill(F(kv), 4); assert(kv.first == 4 && kv.second == 4); } | |
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pagefault.se
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| | | | | Normally when writing OpenGL code, it can get very cumbersome/error-prone when defining how to pass vertex data to the GPU. As a given example, heres a toy vertex structure we want to tell OpenGL how to handle when it gets passed in as an array of data. struct Vertex3f2f { Vec3f pos; Vec2f uv; } With this, the following needs to be done to upload the data to the GPU with OpenGL (and it needs to change if the vertex structure changes, where making these changes by hand every time can easily lead to myster... | |
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qsantos.fr
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| | | | | This article will quickly explain the Rust types [T; N], &[T; N], &[T], Vec, &Vec with C code, and what the str, &str, String, OsString and CString add. Arrays and Slices Rust C [T; N] (array)Example: [i32; 100]Allocated on the stack T[N]Example: int[100]Allocated on the stack &[T; N] (array reference)Example: &[i32; 100]N is tracked at ... Continue reading Rust Strings for C Programmers ? | |
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brevzin.github.io
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| | | Several years ago, I wrote a post about the complexities of implementing comparison operators for optional: Getting in trouble with mixed comparisons. That post was all about how, even just for ==, making a few seemingly straightforward decisions leads to an ambiguity that different libraries handle differently. | ||
