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correct "friend class" syntax #3190

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colin-home merged 1 commit into from
Jun 10, 2021
Merged

correct "friend class" syntax #3190

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4 changes: 2 additions & 2 deletions docs/cpp/friend-cpp.md
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Original file line number Diff line number Diff line change
Expand Up @@ -44,14 +44,14 @@ friend F;

The first form introduces a new class F if no existing class by that name was found in the innermost namespace. **C++11**: The second form does not introduce a new class; it can be used when the class has already been declared, and it must be used when declaring a template type parameter or a typedef as a friend.

Use `class friend F` when the referenced type has not yet been declared:
Use `friend class F` when the referenced type has not yet been declared:

```cpp
namespace NS
{
class M
{
class friend F; // Introduces F but doesn't define it
friend class F; // Introduces F but doesn't define it
};
}
```
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