Using Hint Directives
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 use of this identifier is deprecated, use an alternative instead. The deprecated keyword can be followed by a string constant with a message. The compiler will show this message whenever the identifier is encountered.
- The use of this identifier is experimental: this can be used to flag new features that should be used with caution.
- This is a platform-dependent identifier: it may not be defined on all platforms.
- This should be used on functions and procedures only. It should be used to signal that a particular feature has not yet been implemented.
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.