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XCSDD/docs/api/containers/string/size.md
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String::Length / Capacity / Empty

SizeType Length() const;
SizeType Capacity() const;
bool Empty() const;

获取字符串的长度、容量和判空状态。

参数:

返回:

  • Length() - 返回字符串的字符数(不包括终止 null 字符)
  • Capacity() - 返回已分配的存储容量
  • Empty() - 如果字符串为空则返回 true

复杂度: 均为 O(1)

示例:

#include "XCEngine/Containers/String.h"
#include <iostream>

int main() {
    XCEngine::Containers::String s1;
    std::cout << "Empty: " << s1.Empty() << std::endl;  // 输出: Empty: 1

    XCEngine::Containers::String s2("Hello");
    std::cout << "Length: " << s2.Length() << std::endl;      // 输出: Length: 5
    std::cout << "Capacity: " << s2.Capacity() << std::endl;  // 输出: Capacity: 6 或更大

    s2.Reserve(100);
    std::cout << "After Reserve(100), Capacity: " << s2.Capacity() << std::endl;  // 输出: 100

    return 0;
}

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