/Ob (Inline Function Expansion)
/Ob{0|1|2}
The Inline Function Expansion (/Obn) options control inline expansion of functions, where n is one of the following:
| Option | Description |
|---|---|
| /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).
/Ob2 is in effect when /O1, /O2 or /Ox is used. 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.
You can also use #pragma auto_inline to exclude functions from being considered as candidates for inline expansion. Also see #pragma intrinsic.
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
See InlineFunctionExpansion Property.
See Also
/O Options (Optimize Code) | Compiler Options | Setting Compiler Options
