Test cpp17 features on the build server.

tests/CMakeLists.txt

@@ -27,4 +27,5 @@ add_subdirectory(libslic3r)
 add_subdirectory(timeutils)
 add_subdirectory(fff_print)
 add_subdirectory(sla_print)
+add_subdirectory(cpp17)
 # add_subdirectory(example)

tests/cpp17/CMakeLists.txt

@@ -0,0 +1,9 @@
+cmake_minimum_required(VERSION 3.1)
+
+project(Cpp17Test)
+
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+add_executable(cpp17test main.cpp)
+

tests/cpp17/main.cpp

@@ -0,0 +1,72 @@
+#include <cstdlib>
+#include <iostream>
+#include <tuple>
+#include <string>
+// Test for nested namespace definition
+namespace PrusaSlicer::Cpp17 {
+
+template<class T> class Foo
+{
+    T m_arg;
+public:
+    
+    explicit Foo(T &&arg): m_arg{arg} {}
+};
+
+} // namespace PrusaSlicer::Cpp17
+
+template<class T> std::string get_type(const T &v);
+
+template<> std::string get_type(const int &) { return "int"; }
+template<> std::string get_type(const double &) { return "double"; }
+template<> std::string get_type(const float &) { return "double"; }
+
+int main()
+{
+    // /////////////////////////////////////////////////////////////////////////
+    // Template argument deduction for class templates
+    // /////////////////////////////////////////////////////////////////////////
+    
+    auto foo = PrusaSlicer::Cpp17::Foo{1.f};
+    
+    // /////////////////////////////////////////////////////////////////////////
+    // Structured bindings:
+    // /////////////////////////////////////////////////////////////////////////
+    
+    auto my_tuple = std::make_tuple(0.2, 10);
+    
+    auto [a, b] = my_tuple;
+    
+    std::cout << "a is " << get_type(a) << std::endl;
+    std::cout << "b is " << get_type(b) << std::endl;
+    
+    // /////////////////////////////////////////////////////////////////////////
+    // Test for std::apply()
+    // /////////////////////////////////////////////////////////////////////////
+    
+    auto fun = [] (auto a, auto b) {
+        std::cout << "a (" << get_type(a) << ") = " << a << std::endl;
+        std::cout << "b (" << get_type(b) << ") = " << b << std::endl;
+    };
+    
+    std::apply(fun, my_tuple);
+    
+    // /////////////////////////////////////////////////////////////////////////
+    // constexpr lambda and if
+    // /////////////////////////////////////////////////////////////////////////
+    
+    auto isIntegral = [](auto v) constexpr -> bool {
+        if constexpr (std::is_integral_v<decltype(v)>) {
+            return true;
+        } else {
+            return false;
+        }
+    };
+    
+    static_assert (isIntegral(10), "" );
+    // would fail to compile: static_assert (isIntegral(10.0), "" );
+    std::cout << "Integer is integral: " << isIntegral(0) << std::endl;
+    std::cout << "Floating point is not integral: " << isIntegral(0.0) << std::endl;
+    
+    return EXIT_SUCCESS;
+}