Block
From Free Pascal wiki
Jump to navigationJump to searchThe printable version is no longer supported and may have rendering errors. Please update your browser bookmarks and please use the default browser print function instead.
│ English (en) │
A block is a sequence of declarations followed by a sequence of statements.
The declarations are optional.
The sequence of statements can be empty, but at least the begin
…end
-frame has to be present (in routines asm
…end
is allowed, too).
The key feature of a block is, that declarations are only valid while the statements are processed.
This concept is known as scope.
Example
The following is a valid block:
const
foobar = -1;
type
booleanArray = array of boolean;
var
check: booleanArray;
begin
check := booleanArray.create(true, false, true);
end;
An indication, whether something constitutes a block, is, whether you can use it as part of a routine definition, as well as make a program
out of it (syntactically; apart from the terminating dot).