Derive Macro FieldName 

#[derive(FieldName)]

为结构体的每个字段生成对应获取的字段名的方法 （字符串字面量）

方法名为 field_{field_name}, 返回类型为 &'static str（如 field_name）, 值为字段的原始名称（如 "name"）.

示例

#[derive(FieldName)]
struct Person {
    name: String,
    age: u32,
}

impl Person {

    pub fn field_name() -> &'static str {
        "name"
    }

    pub fn field_age() -> &'static str {
        "age"
    }
}

Method for generating corresponding field names for each field of a structure (string literal)

The method name is’ field_ {field_name} ‘, the return type is’ static str’ (such as’ field_name ‘), and the value is the original name of the field (such as’ name’)

Example

#[derive(FieldName)]
struct Person {
    name: String,
    age: u32,
}

impl Person {

    pub fn field_name() -> &'static str {
        "name"
    }

    pub fn field_age() -> &'static str {
        "age"
    }
}