Reduce verbosity with modern idioms (#2)

* Use CTAD and deduction guides to reduce verbosity of some constructions. Rename namespace chain to chains

* 🎨 Committing clang-format changes

* Use recursive lambda pattern to improve result_type_helper and expand

* 🎨 Committing clang-format changes

* Variadic result type

* 🎨 Committing clang-format changes

---------

Co-authored-by: Clang Robot <[email protected]>

fuzz_test/fuzz_tester.cpp

@@ -2,21 +2,19 @@
 #include <iterator>
 #include <utility>
 
-[[nodiscard]] auto sum_values(const uint8_t *Data, size_t Size)
-{
-  constexpr auto scale = 1000;
+[[nodiscard]] auto sum_values(const uint8_t* Data, size_t Size) {
+    constexpr auto scale = 1000;
 
-  int value = 0;
-  for (std::size_t offset = 0; offset < Size; ++offset) {
-    value += static_cast<int>(*std::next(Data, static_cast<long>(offset))) * scale;
-  }
-  return value;
+    int value = 0;
+    for (std::size_t offset = 0; offset < Size; ++offset) {
+        value += static_cast<int>(*std::next(Data, static_cast<long>(offset))) * scale;
+    }
+    return value;
 }
 
 // Fuzzer that attempts to invoke undefined behavior for signed integer overflow
 // cppcheck-suppress unusedFunction symbolName=LLVMFuzzerTestOneInput
-extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size)
-{
-  fmt::print("Value sum: {}, len{}\n", sum_values(Data, Size), Size);
-  return 0;
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* Data, size_t Size) {
+    fmt::print("Value sum: {}, len{}\n", sum_values(Data, Size), Size);
+    return 0;
 }

include/chains/sample_library.hpp

@@ -5,11 +5,12 @@
 
 [[nodiscard]] SAMPLE_LIBRARY_EXPORT int factorial(int) noexcept;
 
-[[nodiscard]] constexpr int factorial_constexpr(int input) noexcept
-{
-  if (input == 0) { return 1; }
+[[nodiscard]] constexpr int factorial_constexpr(int input) noexcept {
+    if (input == 0) {
+        return 1;
+    }
 
-  return input * factorial_constexpr(input - 1);
+    return input * factorial_constexpr(input - 1);
 }
 
 #endif

include/chains/tuple.hpp

@@ -6,7 +6,7 @@
 #ifndef CHAIN_TUPLE_HPP
 #define CHAIN_TUPLE_HPP
 
-namespace chain::inline v0 {
+namespace chains::inline v0 {
 
 namespace detail {
 
@@ -58,7 +58,7 @@ auto tuple_compose(std::tuple<Fs...>&& sequence) {
 
 //--------------------------------------------------------------------------------------------------
 
-} // namespace chain::inline v0
+} // namespace chains::inline v0
 
 //--------------------------------------------------------------------------------------------------