mirror of
https://github.com/isocpp/CppCoreGuidelines.git
synced 2024-03-22 13:30:58 +08:00
Allow [&]
capture default when also capturing this
, closes #2060
This commit is contained in:
parent
0d70ae927d
commit
3c90d590e1
|
@ -2385,7 +2385,7 @@ Other function rules:
|
|||
* [F.51: Where there is a choice, prefer default arguments over overloading](#Rf-default-args)
|
||||
* [F.52: Prefer capturing by reference in lambdas that will be used locally, including passed to algorithms](#Rf-reference-capture)
|
||||
* [F.53: Avoid capturing by reference in lambdas that will be used non-locally, including returned, stored on the heap, or passed to another thread](#Rf-value-capture)
|
||||
* [F.54: If you capture `this`, capture all variables explicitly (no default capture)](#Rf-this-capture)
|
||||
* [F.54: When writing a lambda that captures `this` or any class data member, don't use `[=]` default capture](#Rf-this-capture)
|
||||
* [F.55: Don't use `va_arg` arguments](#F-varargs)
|
||||
* [F.56: Avoid unnecessary condition nesting](#F-nesting)
|
||||
|
||||
|
@ -4118,7 +4118,7 @@ If the `this` pointer must be captured, consider using `[*this]` capture, which
|
|||
* (Simple) Warn when capture-list contains a reference to a locally declared variable
|
||||
* (Complex) Flag when capture-list contains a reference to a locally declared variable and the lambda is passed to a non-`const` and non-local context
|
||||
|
||||
### <a name="Rf-this-capture"></a>F.54: If you capture `this`, capture all variables explicitly (no default capture)
|
||||
### <a name="Rf-this-capture"></a>F.54: When writing a lambda that captures `this` or any class data member, don't use `[=]` default capture
|
||||
|
||||
##### Reason
|
||||
|
||||
|
@ -4154,11 +4154,11 @@ It's confusing. Writing `[=]` in a member function appears to capture by value,
|
|||
|
||||
##### Note
|
||||
|
||||
This is under active discussion in standardization, and might be addressed in a future version of the standard by adding a new capture mode or possibly adjusting the meaning of `[=]`. For now, just be explicit.
|
||||
If you intend to capture a copy of all class data members, consider C++17 `[*this]`.
|
||||
|
||||
##### Enforcement
|
||||
|
||||
* Flag any lambda capture-list that specifies a capture-default (e.g., `=` or `&`) and also captures `this` (whether explicitly such as `[&, this]` or via default capture such as `[=]` and a use of `this` in the body)
|
||||
* Flag any lambda capture-list that specifies a capture-default of `[=]` and also captures `this` (whether explicitly or via the default capture and a use of `this` in the body)
|
||||
|
||||
### <a name="F-varargs"></a>F.55: Don't use `va_arg` arguments
|
||||
|
||||
|
|
Loading…
Reference in New Issue
Block a user