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.
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