From 2d5a024f627202436148455f4c230b3665ece739 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?El=20Kharroubi=20Micha=C3=ABl?=
<michael.el-kharroubi@hesge.ch>
Date: Mon, 12 Feb 2024 17:26:34 +0100
Subject: [PATCH] [WIP] Add examples for future C++
---
.gitignore | 3 ++-
Examples/cartesian_prod.cpp | 23 +++++++++++++++++++++++
Examples/mdspan.cpp | 23 +++++++++++++++++++++++
3 files changed, 48 insertions(+), 1 deletion(-)
create mode 100644 Examples/cartesian_prod.cpp
create mode 100644 Examples/mdspan.cpp
diff --git a/.gitignore b/.gitignore
index a91c6d0..c5cf88a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
-PDFs/*.pdf
\ No newline at end of file
+PDFs/*.pdf
+**/Examples/artefacts
\ No newline at end of file
diff --git a/Examples/cartesian_prod.cpp b/Examples/cartesian_prod.cpp
new file mode 100644
index 0000000..df4ea74
--- /dev/null
+++ b/Examples/cartesian_prod.cpp
@@ -0,0 +1,23 @@
+#include <array>
+#include <iostream>
+#include <list>
+#include <ranges/v3/view/cartesian_product.hpp>
+#include <ranges>
+#include <string>
+#include <vector>
+
+namespace stdexp = std::experimental;
+
+void print(std::tuple<char const&, int const&, std::string const&> t, int pos) {
+ const auto& [a, b, c] = t;
+ std::cout << '(' << a << ' ' << b << ' ' << c << ')' << (pos % 4 ? " " : "\n");
+}
+
+int main() {
+ const auto x = std::array{'A', 'B'};
+ const auto y = std::vector{1, 2, 3};
+ const auto z = std::list<std::string>{"α", "β", "γ", "δ"};
+
+ for (int i{1}; auto const& tuple : stdexp::views::cartesian_product(x, y, z))
+ print(tuple, i++);
+}
\ No newline at end of file
diff --git a/Examples/mdspan.cpp b/Examples/mdspan.cpp
new file mode 100644
index 0000000..d594e99
--- /dev/null
+++ b/Examples/mdspan.cpp
@@ -0,0 +1,23 @@
+#include <experimental/mdspan>
+#include <iostream>
+namespace stdex = std::experimental;
+int main() {
+ std::array d{
+ 0,
+ 5,
+ 1,
+ 3,
+ 8,
+ 4,
+ 2,
+ 7,
+ 6,
+ };
+
+ stdex::mdspan m{d.data(), stdex::extents{3, 3}};
+ static_assert(m.rank() == 2, "Rank is two");
+ for (std::size_t i = 0; i < m.extent(0); ++i)
+ for (std::size_t j = 0; j < m.extent(1); ++j)
+ std::cout << "m(" << i << ", " << j << ") == " << m(i, j) << "\n";
+ return 0;
+}
\ No newline at end of file
--
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