Scope
The scope is the visible range of a variable.
Table of contents:
Category
A scope is a range of source code that can refer to a variable.
If a scope surrounds another scope, it can see the variables in the outer scope from the inner scope. It cannot see variables in the inner scope from the outer scope.
Category of scopes are:
Class definition scope
Member definition scope
Compound statement scope
Class definition scope
The class definition scope is the scope generated by the class definition.
Variables that have a class definition scope are fields of that class.
Member definition scope
The member definition scope is the scope generated by the following definition.
Compound statement scope
The compound statement scope is the scope generated by the following statement.
Example
| 1: | class example |
| 2: | ... // ♦1 Class definition scope |
| 3: | open method void someMethod() |
| 4: | ... // ♦2 Member definition scope |
| 5: | if(true) |
| 6: | ... // ♦3 Compound statement scope |
| 7: | endif |
| 8: | endmethod |
| 9: | ec |
♦1: ♦2 and ♦3 cannot be referenced.
♦2: ♦1 can be referenced. ♦3 can not be referenced.
♦3: ♦1 and ♦2 can be referenced.