我想知道为什么= capture-default模式禁止在C lambda表达式的捕获列表中.
那是,
[=,this]{ }; // error
[&,this]{ }; // OK
这由C 11 5.1.2 / 8规定.
- If a lambda-capture includes a capture-default that is &,the
identifiers in the lambda-capture shall not be preceded by &.- If a lambda-capture includes a capture-default that is =,the
lambda-capture shall not contain this and each identifier it contains
shall be preceded by &.
问：这个规则有什么理由或背景故事吗？
