/Ob (Inline Function Expansion)
The Inline Function Expansion (/Obn) options control inline expansion of functions, where n is one of the following:
|/Ob0||Disables inline expansion, which is on by default.|
|/Ob1||Expands only functions marked as inline or __inline or, in a C++ member function, defined within a class declaration.|
|/Ob2||Expands functions marked as inline or __inline and any other function that the compiler chooses (expansion occurs at the compiler's discretion, often referred to as auto-inlining).
This option requires that you enable optimizations using /O1, /O2, /Ox, or /Og.
The compiler treats the inline expansion options and keywords as suggestions. There is no guarantee that functions will be expanded inline. You cannot force the compiler to inline a particular function.
To set this compiler option in the Visual Studio development environment
- Open the project's Property Pages dialog box. For details, see Setting Visual C++ Project Properties.
- Click the C/C++ folder.
- Click the Optimization property page.
- Modify the Inline Function Expansion property.
To set this compiler option programmatically