update

20240906/bitset.cpp

@@ -1,8 +1,10 @@
+#include <any>
 #include <array>
 #include <climits>
 #include <cstddef>
-#include <format>
 #include <iostream>
+#include <ostream>
+#include <string>
 #include <vector>
 using namespace std;
 
@@ -11,42 +13,84 @@ typedef int i8;
 
 const u8 MAX = 1e5+1;
 
-constexpr std::array<u8, (size_t)MAX> initLog2(){
+template<typename T>
+struct std::formatter<std::vector<T>> {
+    constexpr auto parse(format_parse_context& ctx)const {
+        return ctx.begin();
+    }
+
+    constexpr auto format(const std::vector<T>& v, auto& ctx)const {
+        auto out = ctx.out();
+        std::format_to(out, "[");
+        for (size_t i = 0; i < v.size(); ++i) {
+            if (i > 0) {
+                std::format_to(out, ", ");
+            }
+            std::format_to(out, "{}", v[i]);
+        }
+        return std::format_to(out, "]");
+    }
+};
+
+constexpr std::array<u8, (size_t)MAX> initLog2() {
     std::array<u8, (size_t)MAX> log2{};
-    log2[1]=0;
-    for(int i=2;i<=(int)MAX-1;i++){
-        log2[i]=log2[i/2]+1;
+    log2[1] = 0;
+    for (int i = 2; i <= (int)MAX - 1; i++) {
+        log2[i] = log2[i / 2] + 1;
     }
     return log2;
 }
 
-class BitIntSet{
+class BitIntSet {
 private:
-    constexpr static const std::array<u8, (size_t)MAX> log2=initLog2();
+    constexpr static const std::array<u8, (size_t)MAX> log2 = initLog2();
 public:
     i8 data;
 
-    explicit BitIntSet(i8 n):data{n}{
-        // checkLog2IsInitalized();
+    constexpr explicit BitIntSet(i8 n) : data{n} {}
+
+    constexpr int getLowbit() const {
+        return this->data & ((~this->data) + 1);
     }
-    int getLowbit()const{
-        return this->data&((~this->data)+1);
+
+    constexpr int getLowbit(u8 n) const {
+        return n & ((~n) + 1);
     }
-    int getLowbit(u8 n)const{
-        return n&((~n)+1);
-    }
-    std::vector<u8> get1Dir()const{
+
+    constexpr std::vector<u8> get1Dir() const {
         std::vector<u8> ret;
-        int temp=this->data;
-        while(temp>0){
-            ret.push_back(log2[this->getLowbit()]);
-            temp-=getLowbit(temp);
+        int temp = this->data;
+        while (temp != 0) {
+            // #ifndef NDEBUG
+            //     std::cout<<std::format("[Debug]the lowbit of {} is {}\n",temp,getLowbit(temp));
+            // #endif
+            ret.push_back(log2[getLowbit(temp)]);
+            temp -= getLowbit(temp);
         }
         return ret;
     }
 };
 
-int main(){
-    BitIntSet b(10);
-    std::cout<<std::format("{0}.getLowbit()={1}\n{0}.get1Dir()={2}",b.data,b.getLowbit(),b.getLowbit());
+auto getTypeName(std::any &a){
+    return a.type().name();
+}
+
+template<class ...Args>
+void print(const Args&...args){
+    ((std::cout<<args),...);
+}
+
+template<typename... Args>
+void println(const Args&...args){
+    ((std::cout<<args<<" "),...);
+    endl(std::cout);
+}
+
+int main() {
+    int at =1;
+    println(at,"b",123,"c");
+    constexpr BitIntSet bit(257);
+    constexpr auto a = bit.data,b=bit.getLowbit();
+    auto c = bit.get1Dir();
+    std::cout<<a<<" "<<b<<" "<<c[0]<<" "<<c[1]<<std::endl;
 }

xmake.lua

@@ -2,13 +2,12 @@ add_rules("mode.debug","mode.release")
 if is_mode("debug") then 
     -- add_cxxflags("-O2","-DOI")
     add_cxxflags("-DOI")
+    add_cxxflags("-Wextra")
 end 
-if is_mode("release") then 
+if is_mode("release") and (is_plat("linux")or is_plat("mingw")) then 
     add_cxxflags("-march=native")
-    add_cxxflags("-fconstexpr-loop-limit=2147483647")
-    add_cxxflags("-fconstexpr-ops-limit=2147483647")
 end 
-set_languages("c++23")
+set_languages("c++latest")
 set_warnings("all")
 
 target("P1158")