refactor: use std=20

- Use string_view

Author: spjuanjoc

include/Greet/Foo.h

@@ -9,7 +9,7 @@
 #ifndef FOO_H
 #define FOO_H
 
-#include <string>
+#include <string_view>
 
 namespace Greet
 {
@@ -27,11 +27,11 @@ class Foo
 
   void setPlatform();
 
-  std::string getPlatform() const;
+  std::string_view getPlatform() const;
 
 private:
-  int         m_value {};
-  std::string m_platform;
+  int              m_value {};
+  std::string_view m_platform;
 };
 
 }  // namespace Greet

src/Greet/Foo.cpp

@@ -29,7 +29,7 @@ Foo::greetFromPlatform() const
   fmt::print("Hello foo: {} from {}\n", m_value, getPlatform());
 }
 
-std::string
+std::string_view
 Foo::getPlatform() const
 {
   return m_platform;

test/Foo/test.Foo.c++

@@ -21,7 +21,7 @@ TEST_CASE("test the execution of foo in OSX", "[foo]")
   const auto foo = std::make_unique<Foo>(42);
 
   foo->greetFromPlatform();
-  auto platform = foo->getPlatform();
+  const auto platform = foo->getPlatform();
 
   fmt::print("Foo in {}\n", platform);