Re: Procedural parameters
Michael Van Canneyt via fpc-pascal <[email protected]>
| Newsgroups | gmane.comp.compilers.free-pascal.general |
|---|---|
| Message-ID | <[email protected]> |
On Sat, 14 Dec 2024, Adriaan van Os via fpc-pascal wrote: > > Macpascal and Iso pascal have procedural parameters, e.g. > > function A( function B: double): double; > > Is there a $modeswitch to allow this ? I searched "procedure parameter" and > "procedural parameter" in the Language Reference, but could not find > anything. As far as I know, the above is not allowed. you must declare the callback type explicitly. TMyFunc = function : double; function A(B : TMyFunc): double; This is in line with 'declare before use': procedure parameter lists cannot be used to declare types. Similarly, you also cannot write: function A(B : (one,two,three)) : double; > > Also, I wonder if "ISOPROGRAMPARAS" in the Programmer's Guide is spelled > correctly. It is, as that is what is used in the compiler: globtype.pas:736 Michael. _______________________________________________ fpc-pascal maillist - [email protected] https://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal