Add Range v3 as a submodule

We want to utilize features from C++ 20 ranges but they haven't been entirely implemented in libc++ so in the meantime we use the reference implementation for it which is Ranges v3.

.gitmodules

@@ -42,3 +42,6 @@
 	path = app/libraries/llvm
 	url = https://github.com/llvm/llvm-project.git
 	shallow = true
+[submodule "C++ Range v3"]
+	path = app/libraries/range
+	url = https://github.com/ericniebler/range-v3

app/CMakeLists.txt

@@ -98,6 +98,9 @@ set(Boost_USE_STATIC_LIBS ON)
 set(Boost_USE_MULTITHREADED ON)
 add_subdirectory("libraries/boost")
 
+# C++ Range v3
+add_subdirectory("libraries/range")
+
 # Build Skyline with full debugging data and -Og for debug builds
 set(CMAKE_CXX_FLAGS_DEBUG "-O0 -g3 -glldb -gdwarf-5")
 

app/libraries/range

@@ -0,0 +1 @@
+Subproject commit 83783f578e0e6666d68a3bf17b0038a80e62530e

app/src/main/res/values/strings.xml

@@ -139,6 +139,7 @@
     <string name="perfetto_description">Perfetto is used to profile and debug with detailed tracing</string>
     <string name="fmtlib_description">{fmt} provides a modern C++ string formatting API</string>
     <string name="boost_description">Boost provides high-quality implementations of containers and other convenience functions in C++</string>
+    <string name="rangev3_description">Range v3 is a reference implementation of ISO C++ 20 ranges, this allows us to use ranges while they are developed in LLVM\'s libc++</string>
     <string name="frozen_description">Frozen provides compile-time immutable hash maps with a perfect hash function for faster lookups</string>
     <string name="pugixml_description">pugixml is used to parse the preference XML to retrieve settings from C++</string>
     <string name="opus_description">Opus Audio Codec provides a high-quality Opus decoder used to decode Opus-encoded audio provided by the guest</string>

app/src/main/res/xml/preferences.xml

@@ -180,6 +180,12 @@
             app:libraryUrl="https://www.boost.org"
             app:summary="@string/boost_description"
             app:title="Boost" />
+        <emu.skyline.preference.LicensePreference
+            app:libraryCopyright="Copyright Eric Niebler 2019-present"
+            app:libraryLicense="@string/boost_software_license"
+            app:libraryUrl="https://github.com/ericniebler/range-v3"
+            app:summary="@string/rangev3_description"
+            app:title="Range v3" />
         <emu.skyline.preference.LicensePreference
             app:libraryCopyright="Copyright 2016 QuarksLab"
             app:libraryLicense="@string/apache2_license"