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C++ keyword: goto

From cppreference.net
C++ language
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Flow control
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Boolean - Integer - Floating-point
Character - String - nullptr (C++11)
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用法

  • goto 语句:作为该语句的声明

示例

#include <cassert>
#include <string>
[[nodiscard]] auto get_first_line(const std::string& string)
{
    std::string first_line{};
    for (const auto character : string)
        switch (character)
        {
            case '\n':
                goto past_for; // 从'范围for循环'中跳出
            default:
                first_line += character;
                break;
        }
past_for:
    return first_line;
}
int main()
{
    assert(get_first_line("Hello\nworld!") == "Hello");
}

参见

(自 C++17 起)
(自 C++23 起)
(自 C++20 起)