Disables or restores the /RTC settings.
You cannot enable a run-time check that was not enabled with a compiler option. For example, if you do not specify /RTCs, specifying #pragma runtime_checks( "s", restore) will not enable stack frame verification.
The runtime_checks pragma must appear outside a function and takes effect at the first function defined after the pragma is seen. The restore and off arguments turn options specified in the runtime_checks on or off.
The runtime_checks can be zero or more of the parameters shown in the following table.
Type of run-time check
Enables stack (frame) verification.
Reports when a value is assigned to a smaller data type that results in a data loss.
Reports when a variable is used before it is defined.
These are the same letters used with the /RTC compiler option. For example:
#pragma runtime_checks( "sc", restore )
Using the runtime_checks pragma with the empty string ("") is a special form of the directive:
When you use the off parameter, it turns the run-time error checks, listed in the table above, off.
When you use the restore parameter, it resets the run-time error checks to those that you specified with the /RTC compiler option.
#pragma runtime_checks( "", off ) . . . #pragma runtime_checks( "", restore )