例如,可以定义一个自定义类型,并在该类型上实现String()方法来定义输出格式。 示例代码如下: package main import "fmt" type CustomType struct { Value int } func (c CustomType) String() string { return fmt.Sprintf("CustomType: %d", c.Value) } func main() { customObj := CustomType{Value: ...
fmt当然不会用type_info,它用了自己的一套enum来编码类型信息[4],毕竟常见的能直接被格式化的类型就那么几样,更复杂的意味着要专门的custom handler,那信息就靠handler来储存了。 (其实fmt还特意把类型限制在16种,这样只要4bit编码) 更进一步,fmt后来还加入了dynamic_format_arg_store,以便实现运行期动态构造参数...
public: using char_type = typename Context::char_type; …… private: // Formats an argument of a custom type, such as a user-defined class. template <typename T, typename Formatter> static void format_custom_arg(const void* arg, typename Context::parse_context_type& parse_ctx, Context& ...
const string &getKey()const{return m_key;}; 第一个const返回值的类型 第二个const的含义:任何不会//修改数据的成员函数都应该声明为const TODO: //cout << fmt::format("kv2:{:d}", kv1) << endl; //测试未通过 //TODO: test_format_custom.cc:55:41: error: expression ‘<throw-expression>...
store.push_back(std::cref(a1));//Changing str affects the output but only for string and custom types.str[0] ='X'; std::stringresult = fmt::vformat("{} and {a1_}"); assert(result=="X234567890 and 42"); 5.2.3)、push_back 函数原型: ...
Search or jump to... Search code, repositories, users, issues, pull requests... Provide feedback We read every piece of feedback, and take your input very seriously. Include my email address so I can be contacted Cancel Submit feedback Saved searches Use saved searches to filter your...
value<Context> fmt::v10::detail::make_arg(T&&) [with bool IS_PACKED = true; Context = fmt::v10::basic_format_context<fmt::v10::appender, char>; type <anonymous> = fmt::v10::detail::type::custom_type; T = Test_e&; typename std::enable_if<IS_PACKED, int>::type <anonymous...
By use case CI/CD & Automation DevOps DevSecOps Resources Topics AI DevOps Security Software Development View all Explore Learning Pathways White papers, Ebooks, Webinars Customer Stories Partners Open Source GitHub Sponsors Fund open source developers The ReadME Project GitHub community...
Golang custom type fmt printing I have a custom type like this: type Timestamp struct { Time time.Time } // some more methods... Now when I print an instance of it using fmt: test := Timestamp{ Time: time.Now(), } fmt... go...
<fmt:formatDate value="${isoDate}" type="time" timeStyle="full"/>下午11时59分59秒 CDT Attribute: pattern; optional. Inidcates date/time custom patterns. <fmt:formatDate value="${date}" type="both" pattern="EEEE, MMMM d, yyyy HH:mm:ss Z"/>星期四, 四月 1, 2004 13:30:00 -...