string impl

Author: Julian LALU

interface/core/string/cstring_view.h

@@ -258,7 +258,8 @@ namespace hud
             return ptr_[i];
         }
 
-    private:
+    [[nodiscard]]
+    constexpr bool is_valid_c private :
         /**Pointer to the null-terminated C-style string. */
         char_type *ptr_;
     };

interface/core/string/string.h

@@ -1,11 +1,19 @@
 #ifndef HD_INC_CORE_STRING_STRING_H
 #define HD_INC_CORE_STRING_STRING_H
+#include "../containers/vector.h"
 
 namespace hud
 {
     class string
     {
+        constexpr string() noexcept = default;
+        constexpr string(const string &) noexcept = default;
+        constexpr string(string &&) noexcept = default;
+        constexpr string &operator=(const string &) noexcept = default;
+        constexpr string &operator=(string &&) noexcept = default;
+
     private:
+        hud::vector<char8> data_;
     };
 } // namespace hud
 

interface/core/string/string_view.h

@@ -0,0 +1,21 @@
+#ifndef HD_INC_CORE_STRING_STRING_VIEW_H
+#define HD_INC_CORE_STRING_STRING_VIEW_H
+
+namespace hud
+{
+    /**
+     * Valid UTF-8 string view
+     */
+    template<typename char_t>
+    struct cstring_view
+    {
+
+    private:
+        /** An UTF-8 valid string view. */
+        char8 *ptr_;
+        usize len;
+    };
+
+} // namespace hud
+
+#endif // HD_INC_CORE_STRING_STRING_VIEW_H

src/string/cstring_view.cpp

@@ -0,0 +1 @@
+#include <core/string/cstring_view.h>

test/string/string_constructors.cpp

@@ -0,0 +1,30 @@
+
+#include <core/string.h>
+
+GTEST_TEST(string, default_constructor_should_allocate_no_memory)
+{
+    auto test = []() -> std::tuple<bool, usize, usize> {
+        hud::string s;
+        return std::tuple {
+            s.data() == nullptr,
+            s.count() == 0u,
+            s.max_count() == 0u
+        };
+    };
+
+    // Non Constant
+    {
+        auto result = test();
+        hud_assert_true(std::get<0>(result));
+        hud_assert_eq(std::get<1>(result), 0u);
+        hud_assert_eq(std::get<2>(result), 0u);
+    }
+
+    // Constant
+    {
+        constexpr auto result = test();
+        hud_assert_true(std::get<0>(result));
+        hud_assert_eq(std::get<1>(result), 0u);
+        hud_assert_eq(std::get<2>(result), 0u);
+    }
+}