Initial Course

modules/13_cpp23/include/expected.hpp

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+#pragma once
+
+#include <expected>
+#include <string>
+
+namespace cpp23 {
+
+enum class ParseError { EmptyInput, InvalidNumber };
+
+[[nodiscard]] auto parse_int(const std::string& text) -> std::expected<int, ParseError>;
+[[nodiscard]] auto safe_sqrt(int value) -> std::expected<double, std::string>;
+[[nodiscard]] auto chain_parse_and_double(const std::string& text) -> std::expected<int, ParseError>;
+
+}  // namespace cpp23

modules/13_cpp23/include/mdspan.hpp

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+#pragma once
+
+#include <mdspan>
+#include <span>
+#include <vector>
+
+namespace cpp23 {
+
+[[nodiscard]] auto make_row_major_matrix(int rows, int cols, int fill) -> std::vector<int>;
+[[nodiscard]] auto matrix_element(std::mdspan<const int, std::extents<int, std::dynamic_extent, std::dynamic_extent>> matrix,
+                                  int row, int col) -> int;
+[[nodiscard]] auto row_sums(std::mdspan<const int, std::extents<int, std::dynamic_extent, std::dynamic_extent>> matrix)
+    -> std::vector<int>;
+
+}  // namespace cpp23

modules/13_cpp23/include/print_and_format.hpp

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+#pragma once
+
+#include <string>
+#include <vector>
+
+namespace cpp23 {
+
+[[nodiscard]] auto format_greeting(const std::string& name, int score) -> std::string;
+[[nodiscard]] auto format_table_row(const std::vector<std::string>& columns) -> std::string;
+[[nodiscard]] auto format_hex(std::uint32_t value) -> std::string;
+
+}  // namespace cpp23

modules/13_cpp23/include/ranges_zip.hpp

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+#pragma once
+
+#include <ranges>
+#include <string>
+#include <vector>
+
+namespace cpp23 {
+
+[[nodiscard]] auto zip_sum(const std::vector<int>& a, const std::vector<int>& b) -> std::vector<int>;
+[[nodiscard]] auto chunk_strings(const std::vector<std::string>& words, std::size_t chunk_size)
+    -> std::vector<std::vector<std::string>>;
+[[nodiscard]] auto adjacent_differences(const std::vector<int>& data) -> std::vector<int>;
+
+}  // namespace cpp23