From 9774bdcf86dc5898311e31c2e040b373d491f8f6 Mon Sep 17 00:00:00 2001
From: Fabian Sauter <sauter.fabian@mailbox.org>
Date: Wed, 10 Jul 2024 09:43:35 +0200
Subject: [PATCH 1/2] Converted the example to c++ modules

---
 CMakeLists.txt           |  8 +++-----
 main.cpp                 | 16 ----------------
 src/CMakeLists.txt       |  6 ++++++
 src/main.cpp             |  5 +++++
 src/mymod/CMakeLists.txt |  7 +++++++
 src/mymod/MyMod.cpp      | 18 ++++++++++++++++++
 6 files changed, 39 insertions(+), 21 deletions(-)
 delete mode 100644 main.cpp
 create mode 100644 src/CMakeLists.txt
 create mode 100644 src/main.cpp
 create mode 100644 src/mymod/CMakeLists.txt
 create mode 100644 src/mymod/MyMod.cpp

diff --git a/CMakeLists.txt b/CMakeLists.txt
index ab170fe..ebac12b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,7 +1,7 @@
-cmake_minimum_required(VERSION 3.20)
+cmake_minimum_required(VERSION 3.28)
 project(cpr_example)
 
-set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD 23)
 
 # Set to C++ 11 if you are using cpr <= 1.9.x
 # More: https://github.com/libcpr/cpr#supported-releases
@@ -20,7 +20,7 @@ if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
   set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "Debug" "Release" "MinSizeRel" "RelWithDebInfo")
 endif()
 
-add_executable(cpr_example main.cpp)
+add_subdirectory(src)
 
 if(WIN32) # Install dlls in the same directory as the executable on Windows
     set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
@@ -31,5 +31,3 @@ include(FetchContent)
 FetchContent_Declare(cpr GIT_REPOSITORY https://github.com/libcpr/cpr.git
                          GIT_TAG 1.10.5) # The commit hash for 1.10.x. Replace with the latest from: https://github.com/libcpr/cpr/releases
 FetchContent_MakeAvailable(cpr)
-
-target_link_libraries(cpr_example PRIVATE cpr::cpr)
diff --git a/main.cpp b/main.cpp
deleted file mode 100644
index 29ab847..0000000
--- a/main.cpp
+++ /dev/null
@@ -1,16 +0,0 @@
-#include <iostream>
-#include <string>
-#include <cpr/cpr.h>
-
-int main(int argc, char** argv) {
-    cpr::Response r = cpr::Get(cpr::Url{"https://api.github.com/repos/whoshuu/cpr/contributors"},
-                               cpr::Authentication{"user", "pass", cpr::AuthMode::BASIC},
-                               cpr::Parameters{{"anon", "true"}, {"key", "value"}});
-    std::cout << "Status code: " << r.status_code << '\n';
-    std::cout << "Header:\n";
-    for (const std::pair<const std::basic_string<char>, std::basic_string<char>>& kv : r.header) {
-        std::cout << '\t' << kv.first << ':' << kv.second << '\n';
-    }
-    std::cout << "Text: " << r.text << '\n';
-    return 0;
-}
\ No newline at end of file
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
new file mode 100644
index 0000000..de3fde1
--- /dev/null
+++ b/src/CMakeLists.txt
@@ -0,0 +1,6 @@
+cmake_minimum_required(VERSION 3.28)
+
+add_subdirectory(mymod)
+
+add_executable(cpr_example main.cpp)
+target_link_libraries(cpr_example PRIVATE mymod)
\ No newline at end of file
diff --git a/src/main.cpp b/src/main.cpp
new file mode 100644
index 0000000..2239969
--- /dev/null
+++ b/src/main.cpp
@@ -0,0 +1,5 @@
+import mymod;
+
+int main(int argc, char** argv) {
+    mymod::GetFromGitHub();
+}
\ No newline at end of file
diff --git a/src/mymod/CMakeLists.txt b/src/mymod/CMakeLists.txt
new file mode 100644
index 0000000..259c6e5
--- /dev/null
+++ b/src/mymod/CMakeLists.txt
@@ -0,0 +1,7 @@
+cmake_minimum_required(VERSION 3.28)
+
+add_library(mymod)
+
+target_sources(mymod PUBLIC FILE_SET CXX_MODULES FILES MyMod.cpp)
+
+target_link_libraries(mymod PRIVATE cpr::cpr)
\ No newline at end of file
diff --git a/src/mymod/MyMod.cpp b/src/mymod/MyMod.cpp
new file mode 100644
index 0000000..ddb2e89
--- /dev/null
+++ b/src/mymod/MyMod.cpp
@@ -0,0 +1,18 @@
+module;
+
+#include <iostream>
+#include <string>
+#include <cpr/cpr.h>
+
+export module mymod;
+
+namespace mymod {
+export void GetFromGitHub() {
+    const cpr::Response response = cpr::Get(cpr::Url{"https://api.github.com/repos/whoshuu/cpr/contributors"},
+                                            cpr::Authentication{"user", "pass", cpr::AuthMode::BASIC},
+                                            cpr::Parameters{{"anon", "true"}, {"key", "value"}});
+    std::cout << "Status code: " << response.status_code << '\n';
+    std::cout << "Header:\n";
+    std::cout << "Text: " << response.text << '\n';
+}
+}  // namespace mymod
\ No newline at end of file

From b316a2dffbb86f5b756e82f38f2eab4e98a30cbe Mon Sep 17 00:00:00 2001
From: Fabian Sauter <sauter.fabian@mailbox.org>
Date: Wed, 10 Jul 2024 09:46:45 +0200
Subject: [PATCH 2/2] Added modules docs to the readme

---
 README.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/README.md b/README.md
index 8c10303..bceff7e 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,8 @@
 # CMake FetchContent Example
 A minimal example for using cpr via FetchContent in CMake.
 
+Also shows how to use C++ 20 modules. This requires gcc >= 14.1.0.
+
 ## Building
 
 ```bash