Mirrors/CppCoreGuidelines
1
0
Fork 0
mirror of https://github.com/isocpp/CppCoreGuidelines.git synced 2025-12-17 12:44:42 +03:00
Code Issues Actions Packages Projects Releases Wiki Activity

Closed #477.'

Browse Source
This commit is contained in:
hsutter
2015-12-23 11:38:26 -08:00
parent dc5cb14536
commit 238ffceb62
1 changed files with 3 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
CppCoreGuidelines.md
View File

@@ -2404,6 +2404,8 @@ If you have multiple values to return, [use a tuple](#Rf-out-multi) or similar m
A struct of many (individually cheap-to-move) elements may be in aggregate expensive to move. A struct of many (individually cheap-to-move) elements may be in aggregate expensive to move.
It is not recommended to return a `const` value. Such older advice is now obsolete; it does not add value, and it interferes with move semantics.
##### Exceptions ##### Exceptions
* For non-value types, such as types in an inheritance hierarchy, return the object by `unique_ptr` or `shared_ptr`. * For non-value types, such as types in an inheritance hierarchy, return the object by `unique_ptr` or `shared_ptr`.
@@ -2425,6 +2427,7 @@ A struct of many (individually cheap-to-move) elements may be in aggregate expen
##### Enforcement ##### Enforcement
* Flag reference to non-`const` parameters that are not read before being written to and are a type that could be cheaply returned; they should be "out" return values. * Flag reference to non-`const` parameters that are not read before being written to and are a type that could be cheaply returned; they should be "out" return values.
* Flag returning a `const` value. To fix: Remove `const` to return a non-`const` value instead.
### <a name="Rf-out-multi"></a> F.21: To return multiple "out" values, prefer returning a tuple or struct ### <a name="Rf-out-multi"></a> F.21: To return multiple "out" values, prefer returning a tuple or struct