RT!;
该实验表明:
1.lambda表达式是类型是一个函数...>_<好像是废话;
2.lambda表达式类型与其捕获方式无关,与其返回类型及参数类型有关...^.`;
我现在很想知道lambda表达式的捕获..原理是什么..;
该实验表明:
1.lambda表达式是类型是一个函数...>_<好像是废话;
2.lambda表达式类型与其捕获方式无关,与其返回类型及参数类型有关...^.`;
我现在很想知道lambda表达式的捕获..原理是什么..;
c++吧 关注：614,150贴子：2,110,534
- 10回复贴，共1页
WG21/N3691
5.1.2
3 The type of the lambda-expression (which is also the type of the closure object) is a unique, unnamed nonunion
class type — called the closure type — whose properties are described below. This class type is not
an aggregate (8.5.1). The closure type is declared in the smallest block scope, class scope, or namespace
scope that contains the corresponding lambda-expression. [ Note: This determines the set of namespaces
and classes associated with the closure type (3.4.2). The parameter types of a lambda-declarator do not
affect these associated namespaces and classes. —end note ] An implementation may define the closure
type differently from what is described below provided this does not alter the observable behavior of the
program other than by changing:
— the size and/or alignment of the closure type,
— whether the closure type is trivially copyable (Clause 9),
— whether the closure type is a standard-layout class (Clause 9), or
— whether the closure type is a POD class (Clause 9).
An implementation shall not add members of rvalue reference type to the closure type.
5.1.2
3 The type of the lambda-expression (which is also the type of the closure object) is a unique, unnamed nonunion
class type — called the closure type — whose properties are described below. This class type is not
an aggregate (8.5.1). The closure type is declared in the smallest block scope, class scope, or namespace
scope that contains the corresponding lambda-expression. [ Note: This determines the set of namespaces
and classes associated with the closure type (3.4.2). The parameter types of a lambda-declarator do not
affect these associated namespaces and classes. —end note ] An implementation may define the closure
type differently from what is described below provided this does not alter the observable behavior of the
program other than by changing:
— the size and/or alignment of the closure type,
— whether the closure type is trivially copyable (Clause 9),
— whether the closure type is a standard-layout class (Clause 9), or
— whether the closure type is a POD class (Clause 9).
An implementation shall not add members of rvalue reference type to the closure type.
