{"id":5201,"date":"2025-06-11T12:39:48","date_gmt":"2025-06-11T04:39:48","guid":{"rendered":"https:\/\/www.diggoodbox.com\/blog\/?p=5201"},"modified":"2025-06-11T12:39:48","modified_gmt":"2025-06-11T04:39:48","slug":"%e7%8e%b0%e4%bb%a3c%e6%a8%a1%e6%9d%bf%e5%87%bd%e6%95%b0%e4%b8%8e%e6%a8%a1%e6%9d%bf%e7%b1%bb%e6%80%bb%e7%bb%93modern-c-template-functions-classes-summary","status":"publish","type":"post","link":"https:\/\/www.diggoodbox.com\/blog\/?p=5201","title":{"rendered":"\u73b0\u4ee3C++\u6a21\u677f\u51fd\u6570\u4e0e\u6a21\u677f\u7c7b\u603b\u7ed3(Modern C++ Template Functions & Classes Summary)"},"content":{"rendered":"\n

<\/p>\n\n\n\n

\u4e2d\u6587<\/strong><\/td>English<\/strong><\/td><\/tr>
1. \u6a21\u677f\u57fa\u7840<\/strong><\/td>1. Template Basics<\/strong><\/td><\/tr>
– \u6a21\u677f\u662f\u6cdb\u578b\u7f16\u7a0b\u7684\u6838\u5fc3\u673a\u5236\uff0c\u5b9e\u73b0\u4ee3\u7801\u590d\u7528\u3002<\/td>– Templates enable generic programming, facilitating code reuse.<\/td><\/tr>
– \u6a21\u677f\u51fd\u6570\u548c\u6a21\u677f\u7c7b\u5141\u8bb8\u7c7b\u578b\u53c2\u6570\u5316\u3002<\/td>– Template functions and classes allow parameterization by types.<\/td><\/tr>
– \u8bed\u6cd5\u793a\u4f8b\uff1a<\/td>– Syntax example:<\/td><\/tr>
“`cpp<\/td>“`cpp<\/td><\/tr>
template<typename T><\/td>template<typename T><\/td><\/tr>
T max(T a, T b) { return a > b ? a : b; }<\/td>T max(T a, T b) { return a > b ? a : b; }<\/td><\/tr>
“`<\/td>“`<\/td><\/tr>
<\/td><\/td><\/tr>
2. \u6a21\u677f\u51fd\u6570<\/strong><\/td>2. Template Functions<\/strong><\/td><\/tr>
– \u652f\u6301\u51fd\u6570\u91cd\u8f7d\u548c\u6a21\u677f\u91cd\u8f7d\uff0c\u6839\u636e\u53c2\u6570\u7c7b\u578b\u81ea\u52a8\u63a8\u5bfc\u3002<\/td>– Support function overloading and template overloading, with automatic type deduction.<\/td><\/tr>
– \u652f\u6301\u975e\u7c7b\u578b\u6a21\u677f\u53c2\u6570\uff0c\u5982\u6574\u6570\u3001\u6307\u9488\u7b49\u3002<\/td>– Support non-type template parameters like integers, pointers, etc.<\/td><\/tr>
<\/td><\/td><\/tr>
3. \u6a21\u677f\u7c7b<\/strong><\/td>3. Template Classes<\/strong><\/td><\/tr>
– \u7c7b\u6a21\u677f\u53c2\u6570\u5316\u7c7b\u578b\uff0c\u5b9e\u73b0\u901a\u7528\u6570\u636e\u7ed3\u6784\u3002<\/td>– Class templates parameterize types for generic data structures.<\/td><\/tr>
– \u793a\u4f8b\uff1a<\/td>– Example:<\/td><\/tr>
“`cpp<\/td>“`cpp<\/td><\/tr>
template<typename T><\/td>template<typename T><\/td><\/tr>
class Container {<\/td>class Container {<\/td><\/tr>
T value;<\/td>T value;<\/td><\/tr>
public:<\/td>public:<\/td><\/tr>
Container(T v) : value(v) {}<\/td>Container(T v) : value(v) {}<\/td><\/tr>
T get() { return value; }<\/td>T get() { return value; }<\/td><\/tr>
};<\/td>};<\/td><\/tr>
“`<\/td>“`<\/td><\/tr>
<\/td><\/td><\/tr>
4. \u6a21\u677f\u7279\u5316<\/strong><\/td>4. Template Specialization<\/strong><\/td><\/tr>
– \u5168\u7279\u5316\uff1a\u4e3a\u7279\u5b9a\u7c7b\u578b\u63d0\u4f9b\u7279\u6b8a\u5b9e\u73b0\u3002<\/td>– Full specialization: provide special implementation for specific types.<\/td><\/tr>
– \u504f\u7279\u5316\uff08\u4ec5\u7c7b\u6a21\u677f\u652f\u6301\uff09\uff1a\u9488\u5bf9\u90e8\u5206\u6a21\u677f\u53c2\u6570\u505a\u7279\u6b8a\u5904\u7406\u3002<\/td>– Partial specialization (only class templates): specialize some template parameters.<\/td><\/tr>
<\/td><\/td><\/tr>
5. \u73b0\u4ee3C++\u5bf9\u6a21\u677f\u7684\u589e\u5f3a<\/strong><\/td>5. Modern C++ Enhancements to Templates<\/strong><\/td><\/tr>
– \u81ea\u52a8\u7c7b\u578b\u63a8\u5bfc\uff08C++11\uff09<\/strong>\uff1a\u4f7f\u7528auto\u548cdecltype\u7b80\u5316\u6a21\u677f\u4ee3\u7801\u3002<\/td>– Type deduction (C++11)<\/strong>: use auto and decltype to simplify template code.<\/td><\/tr>
– \u522b\u540d\u6a21\u677f\uff08C++11\uff09<\/strong>\uff1a\u4f7f\u7528using\u5b9a\u4e49\u6a21\u677f\u522b\u540d\u3002<\/td>– Alias templates (C++11)<\/strong>: use using to create template aliases.<\/td><\/tr>
– \u53ef\u53d8\u53c2\u6570\u6a21\u677f\uff08C++11\uff09<\/strong>\uff1a\u652f\u6301\u4efb\u610f\u6570\u91cf\u6a21\u677f\u53c2\u6570\uff0c\u5b9e\u73b0\u6a21\u677f\u5143\u7f16\u7a0b\u3002<\/td>– Variadic templates (C++11)<\/strong>: support arbitrary number of template parameters.<\/td><\/tr>
– constexpr<\/strong> \u4e0e\u6a21\u677f\u7ed3\u5408\uff08C++11\u53ca\u4ee5\u540e\uff09<\/strong>\uff1a\u7f16\u8bd1\u671f\u8ba1\u7b97\uff0c\u63d0\u9ad8\u6027\u80fd\u3002<\/td>– constexpr<\/strong> with templates (C++11+)<\/strong>: enable compile-time computation.<\/td><\/tr>
– \u6982\u5ff5\uff08Concepts\uff0cC++20\uff09<\/strong>\uff1a\u5b9a\u4e49\u6a21\u677f\u53c2\u6570\u7ea6\u675f\uff0c\u63d0\u5347\u6a21\u677f\u4ee3\u7801\u53ef\u8bfb\u6027\u548c\u5b89\u5168\u6027\u3002<\/td>– Concepts (C++20)<\/strong>: constrain template parameters for readability and safety.<\/td><\/tr>
<\/td><\/td><\/tr>
6. \u53ef\u53d8\u53c2\u6570\u6a21\u677f\u793a\u4f8b<\/strong><\/td>6. Variadic Template Example<\/strong><\/td><\/tr>
“`cpp<\/td>“`cpp<\/td><\/tr>
template<typename T><\/td>template<typename T><\/td><\/tr>
void print(T t) { std::cout << t << std::endl; }<\/td>void print(T t) { std::cout << t << std::endl; }<\/td><\/tr>
<\/td><\/td><\/tr>
template<typename T, typename… Args><\/td>template<typename T, typename… Args><\/td><\/tr>
void print(T t, Args… args) {<\/td>void print(T t, Args… args) {<\/td><\/tr>
std::cout << t << “, “;<\/td>std::cout << t << “, “;<\/td><\/tr>
print(args…);<\/td>print(args…);<\/td><\/tr>
}<\/td>}<\/td><\/tr>
“`<\/td>“`<\/td><\/tr>
<\/td><\/td><\/tr>
7. \u6982\u5ff5\uff08Concepts\uff09\u793a\u4f8b\uff08C++20\uff09<\/strong><\/td>7. Concepts Example (C++20)<\/strong><\/td><\/tr>
“`cpp<\/td>“`cpp<\/td><\/tr>
template<typename T> requires std::integral<T><\/td>template<typename T> requires std::integral<T><\/td><\/tr>
T add(T a, T b) { return a + b; }<\/td>T add(T a, T b) { return a + b; }<\/td><\/tr>
“`<\/td>“`<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\n\n\n\n

<\/p>\n","protected":false},"excerpt":{"rendered":"

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