»Language: Scope
Scope is the context in which variables are created and accessed. If a variable exists in a parent scope, it is accessed and can be modified. Otherwise, the variable is created in your current scope.
Scopes are created with blocks. A block is a possibly empty sequence
of statements within matching brace brackets {}
. You may nest blocks
to create nested scopes.
In addition to explicitly created blocks, there are implicit blocks:
- The policy block encapsulates an entire policy.
- Each
any
,all
, andfor
statement is considered to be in its own block. Note thatif
statements do not create their own block.
The example policy below shows various effects of scopes: