[sample]

Author: StellarWarp

README.md

@@ -0,0 +1,48 @@
+# Tagged Pointer
+
+a lightweight tagged pointer library for C++20
+
+provide a tuple-like tagged pointer
+
+
+```c++
+"sample1"_test = [] {
+int a = 0;
+tp::tagged_ptr<int, bool, bool> p = &a;
+
+//bool,bool
+const auto [b1,b2] = p;
+
+//bool ref, bool ref
+auto& [b1_ref,b2_ref] = p;
+b1_ref = true;
+b2_ref = true;
+};
+
+"sample2"_test = [] {
+
+enum class Flag {
+None = 0,
+A = 1 << 0,
+B = 1 << 1
+};
+
+int a = 0;
+tp::tagged_ptr<int, tp::tag_of<Flag,2>> p = &a;
+
+auto& [b1] = p;
+b1 = Flag::A;
+
+};
+
+"sample3"_test = [] {
+
+int a = 0;
+//low bits: 2 + x86_64 high bits reserve: 16
+tp::tagged_ptr<int, bool, bool, uint16_t> p = &a;
+
+const auto [b1,b2,i] = p;
+
+};
+```
+

test/sample.cpp

@@ -0,0 +1,56 @@
+#include "../src/tagged_ptr.h"
+#include "ut.hpp"
+
+using namespace boost::ut;
+
+suite sample = [] {
+
+    "sample1"_test = [] {
+        int a = 0;
+        tp::tagged_ptr<int, bool, bool> p = &a;
+
+        //bool,bool
+        const auto [b1,b2] = p;
+
+        //bool ref, bool ref
+        auto& [b1_ref,b2_ref] = p;
+        b1_ref = true;
+        b2_ref = true;
+    };
+
+    "sample2"_test = [] {
+
+        enum class Flag {
+            None = 0,
+            A = 1 << 0,
+            B = 1 << 1
+        };
+
+        int a = 0;
+        tp::tagged_ptr<int, tp::tag_of<Flag,2>> p = &a;
+
+        auto& [b1] = p;
+        b1 = Flag::A;
+
+    };
+
+    "sample3"_test = [] {
+
+        int a = 0;
+        //low bits: 2 + x86_64 high bits reserve: 16
+        tp::tagged_ptr<int, bool, bool, uint16_t> p = &a;
+
+        const auto [b1,b2,i] = p;
+
+    };
+
+    "sample4"_test = [] {
+
+        tp::tagged_ptr<void, uint16_t> p;
+
+        const auto [i] = p;
+
+    };
+
+
+};