Most identifiers (constants, variables, functions or methods, properties) can have a hint directive appended to their definition:
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Hint directives
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Whenever an identifier marked with a hint directive is later encountered by the compiler, then a warning will be displayed, corresponding to the specified hint.
The following are examples:
Const AConst = 12 deprecated; var p : integer platform; Function Something : Integer; experimental; begin Something:=P+AConst; end; begin Something; end.
This would result in the following output:
testhd.pp(11,15) Warning: Symbol "p" is not portable testhd.pp(11,22) Warning: Symbol "AConst" is deprecated testhd.pp(15,3) Warning: Symbol "Something" is experimental
Hint directives can follow all kinds of identifiers: units, constants, types, variables, functions, procedures and methods.