FAST UNSAFE

The UNSAFE keyword, used with FAST, allows the just-in-time compiler to use unsafe but faster code.

Using that keyword has the following effects:

• Conversion from Float to Single does not check for overflow.

• Public object variables are accessed without checking if the object reference is null, or if the object is invalid.

• Array access does not check for index validity.

• Division by zero is not checked.

• Bit access functions do not check the bit index.

• Mathematical functions result validity is not checked.

• Memory access functions do not check for illegal memory access.

• Arithmetic overflows are ignored.

So incorrect code compiled with the UNSAFE keyword usually leads to interpreter crashes, or indeterminate behaviour at best.

See also

• FAST

• Just In Time Compiler