Initial Course

modules/14_cpp26/include/constexpr_frontier.hpp

@@ -0,0 +1,12 @@
+#pragma once
+
+#include <array>
+#include <cstddef>
+
+namespace cpp26 {
+
+[[nodiscard]] auto compile_time_factorial(int n) -> long long;
+[[nodiscard]] auto compile_time_sum(std::array<int, 5> values) -> int;
+[[nodiscard]] auto is_sorted(std::array<int, 5> values) -> bool;
+
+}  // namespace cpp26

modules/14_cpp26/include/custom_formatter.hpp

@@ -0,0 +1,24 @@
+#pragma once
+
+#include <format>
+#include <string>
+
+namespace cpp26 {
+
+struct Point {
+    int x;
+    int y;
+};
+
+[[nodiscard]] auto format_point(const Point& point) -> std::string;
+[[nodiscard]] auto format_points(const Point& a, const Point& b) -> std::string;
+
+}  // namespace cpp26
+
+template <>
+struct std::formatter<cpp26::Point> : std::formatter<std::string> {
+    auto format(const cpp26::Point& point, std::format_context& ctx) const {
+        return std::formatter<std::string>::format(
+            std::format("({}, {})", point.x, point.y), ctx);
+    }
+};

modules/14_cpp26/include/monadic_expected.hpp

@@ -0,0 +1,14 @@
+#pragma once
+
+#include <expected>
+#include <string>
+
+namespace cpp26 {
+
+enum class ErrorCode { NotFound, Invalid };
+
+[[nodiscard]] auto parse_id(const std::string& text) -> std::expected<int, ErrorCode>;
+[[nodiscard]] auto load_user(int id) -> std::expected<std::string, ErrorCode>;
+[[nodiscard]] auto load_user_name(const std::string& text) -> std::expected<std::string, ErrorCode>;
+
+}  // namespace cpp26

modules/14_cpp26/include/pipeline_ranges.hpp

@@ -0,0 +1,18 @@
+#pragma once
+
+#include <string>
+#include <vector>
+
+namespace cpp26 {
+
+struct Record {
+    std::string category;
+    int value;
+};
+
+[[nodiscard]] auto top_values_by_category(const std::vector<Record>& records, int min_value)
+    -> std::vector<Record>;
+[[nodiscard]] auto total_by_category(const std::vector<Record>& records)
+    -> std::vector<std::pair<std::string, int>>;
+
+}  // namespace cpp26