Update to C++20.

src/db_add_language/db_add_language.cpp

@@ -219,7 +219,7 @@ static void process_lang(polygon4::Storage &s, const path &p, polygon4::String p
         AimKV kv1;
         if (db.number_of_values)
         {
-            kv1 = ::get_kv(db, get_cp(p.filename().u8string()));
+            kv1 = ::get_kv(db, get_cp(to_printable_string(p.filename())));
             kvm.insert(kv1.begin(), kv1.end());
         }
     };
@@ -315,7 +315,7 @@ int main(int argc, char *argv[])
 #undef ADD_LANGUAGE
         else
         {
-            std::cerr << "No such lang: " << p.filename().u8string() << "\n";
+            std::cerr << "No such lang: " << to_printable_string(p.filename()) << "\n";
             continue;
         }
     }

src/mmm_extractor/mmm_extractor.cpp

@@ -63,7 +63,7 @@ mmm read_mmm(const path &fn)
 void process_mmm(const path &fn)
 {
     auto m = read_mmm(fn);
-    write_mat_bmp(fn.u8string() + ".bmp", m.data.unpack_mmm());
+    write_mat_bmp(path(fn) += ".bmp", m.data.unpack_mmm());
 }
 
 int main(int argc, char *argv[])

src/mmo_extractor/mmo_extractor.cpp

@@ -105,7 +105,7 @@ mmo_storage read_mmo(const path &fn)
 
 void write_mmo(Storage *storage, const mmo_storage &s)
 {
-    std::string map_name = s.name.filename().stem().u8string();
+    std::string map_name = to_printable_string(s.name.filename().stem());
     if (!prefix.empty())
         map_name = prefix + "." + map_name;
     std::transform(map_name.begin(), map_name.end(), map_name.begin(), ::tolower);
@@ -303,7 +303,7 @@ int main(int argc, char *argv[])
                 std::cout << mg.name;
                 std::cout << " " << mg.org;
                 std::cout << " " << mg.mechanoids.size();
-                std::cout << " " << file.filename().stem().u8string();
+                std::cout << " " << to_printable_string(file.filename().stem());
                 std::cout << "\n";
             }
         });

src/mmp_extractor/mmp.cpp

@@ -393,7 +393,7 @@ void mmp::writeHeightMap()
         fclose(f);
     };
 
-    cv::imwrite((path(filename) += ".heightmap16.png").u8string(), toCvMat(heightmap));
+    cv::imwrite((const char *)to_path_string(path(filename) += ".heightmap16.png").c_str(), toCvMat(heightmap));
 
     //write_hm(".heightmap16.r16", heightmap, sizeof(decltype(heightmap)::type));
     write_hm(".heightmap32.r32", heightmap32, sizeof(decltype(heightmap32)::type));
@@ -471,7 +471,7 @@ void mmp::writeSplitColormap() const
         for (auto &pixel : m)
             pixel = pixel == color ? 0x0000FF00 : 0;
         std::cout << "\r[" << i << "/" << colors.size() << "] Processing color " << ss.str();
-        cv::imwrite(fn.u8string(), toCvMat(m));
+        cv::imwrite((const char *)to_path_string(fn).c_str(), toCvMat(m));
     }
 }
 

src/mod_converter/mod_converter.cpp

@@ -87,7 +87,7 @@ auto read_model(const path &fn)
     if (fn.extension() == ".mod") // single block file from m2 sdk viewer
     {
         block bl;
-        bl.h.name = fn.stem().u8string();
+        bl.h.name = to_printable_string(fn.stem());
         bl.loadPayload(b);
         m.blocks.push_back(bl);
     }
@@ -112,8 +112,8 @@ void convert_model(const model &m, const path &fn)
 {
     // write all
     if (all_formats)
-        m.print(fn.u8string(), AS);
-    m.printFbx(fn.u8string(), AS);
+        m.print(to_printable_string(fn), AS);
+    m.printFbx(to_printable_string(fn), AS);
 }
 
 void convert_model(const path &fn)
@@ -122,7 +122,7 @@ void convert_model(const path &fn)
 
     if (stats)
     {
-        m.save(root[fn.filename().u8string()]);
+        m.save(root[to_printable_string(fn.filename())]);
         return;
     }
 
@@ -159,7 +159,7 @@ int main(int argc, char *argv[])
         }
     }
     else
-        throw std::runtime_error("No such file or directory: " + normalize_path(p));
+        throw std::runtime_error("No such file or directory: " + to_printable_string(normalize_path(p)));
 
     if (stats)
     {

sw.cpp

@@ -6,7 +6,7 @@ void build(Solution &s)
     tools += Git("https://github.com/aimrebirth/tools", "", "{v}");
 
     auto &common = tools.addStaticLibrary("common");
-    common.CPPVersion = CPPLanguageStandard::CPP17;
+    common += cpp20;
     common.setRootDirectory("src/common");
     common.Public += "pub.egorpugin.primitives.filesystem-master"_dep;
     common.Public += "pub.egorpugin.primitives.sw.main-master"_dep;
@@ -14,7 +14,7 @@ void build(Solution &s)
     auto add_exe = [&tools](const String &name) -> decltype(auto)
     {
         auto &t = tools.addExecutable(name);
-        t.CPPVersion = CPPLanguageStandard::CPP17;
+        t += cpp20;
         t.setRootDirectory("src/" + name);
         return t;
     };
@@ -47,14 +47,14 @@ void build(Solution &s)
 
     // not so simple targets
     auto &script2txt = tools.addStaticLibrary("script2txt");
-    script2txt.CPPVersion = CPPLanguageStandard::CPP17;
+    script2txt += cpp20;
     script2txt.setRootDirectory("src/script2txt");
     script2txt += "pub.lzwdgc.Polygon4.DataManager.schema-master"_dep;
     gen_flex_bison_pair("org.sw.demo.lexxmark.winflexbison"_dep, script2txt, "LALR1_CPP_VARIANT_PARSER", "script2txt");
     script2txt.CompileOptions.push_back("/Zc:__cplusplus");
 
     auto &model = tools.addStaticLibrary("model");
-    model.CPPVersion = CPPLanguageStandard::CPP17;
+    model += cpp20;
     model.setRootDirectory("src/model");
     model.Public += common,
         "org.sw.demo.unicode.icu.i18n"_dep,