Clean up warnings found in CI

Author: ckormanyos

code_snippets/chapter05/chapter05_03-002_communication_template.cpp

@@ -53,7 +53,8 @@ class communication
 
     for( ; i < count; ++i)
     {
-      const std::uint8_t by(u >> (i * 8U));
+      const std::uint8_t by
+        {static_cast<std::uint8_t>(u >> (i * 8U)) };
 
       if(!send_byte(by))
       {

code_snippets/chapter05/chapter05_03-003_communication_session.cpp

@@ -51,7 +51,8 @@ class communication
 
     for( ; i < count; ++i)
     {
-      const std::uint8_t by(u >> (i * 8U));
+      const std::uint8_t by
+        {static_cast<std::uint8_t>(u >> (i * 8U)) };
 
       if(!send_byte(by))
       {

code_snippets/chapter05/chapter05_08-001_using_the_stl.cpp

@@ -41,7 +41,7 @@ auto do_something_with_the_stl() -> void
                 v.end(),
                 [](char& c)
                 {
-                  c = char { c + '0' };
+                  c = char { static_cast<char>(c + '0') };
                 });
 
   {

code_snippets/chapter05/chapter05_08-002_using_the_stl_algo.cpp

@@ -42,7 +42,7 @@ void do_something_with_the_stl()
                  v.begin(),
                  [](const char& c) -> char
                  {
-                   return char { c + '0' };
+                   return char { static_cast<char>(c + '0') };
                  });
 
   {

code_snippets/chapter05/chapter05_13-002_array_to_tuple - Copy.cpp

@@ -40,20 +40,21 @@ std::array<int, 4> a =
 }};
 
 // Convert int array to float tuple.
-// Here, the type of t is
+// Here, the type of tpl is
 // std::tuple<float, float, float, float>.
-auto t { array_to_tuple(a) };
+std::tuple<float, float, float, float> tpl
+  { array_to_tuple(a) };
 
 auto main() -> int;
 
 auto main() -> int
 {
   std::stringstream strm { };
 
-  strm << std::fixed << std::get<0>(t) << '\n';
-  strm << std::fixed << std::get<1>(t) << '\n';
-  strm << std::fixed << std::get<2>(t) << '\n';
-  strm << std::fixed << std::get<3>(t) << '\n';
+  strm << std::fixed << std::get<0>(tpl) << '\n';
+  strm << std::fixed << std::get<1>(tpl) << '\n';
+  strm << std::fixed << std::get<2>(tpl) << '\n';
+  strm << std::fixed << std::get<3>(tpl) << '\n';
 
   std::cout << strm.str() << std::endl;
 }

code_snippets/chapter05/chapter05_13-002_array_to_tuple.cpp

@@ -21,9 +21,7 @@ constexpr auto exp_series(
   const floating_point_type x)
     -> floating_point_type
 {
-  static_assert(
-    std::is_floating_point
-      <floating_point_type>::value);
+  static_assert(std::is_floating_point_v<floating_point_type>);
 
   floating_point_type term(1.0L);
   floating_point_type sum (0.0L);
@@ -33,7 +31,7 @@ constexpr auto exp_series(
     sum += term;
 
     term *= x;
-    term /= i;
+    term /= static_cast<floating_point_type>(i);
   }
 
   return sum;