Sets

What is translated > Types > Sets

A Delphi set is simulated in the C++ VCL by the class Set:

template<class T, unsigned char minEl, unsigned char maxEl>

class __declspec(delphireturn) Set;

This set class is part of the C++Builder VCL. Users of other compilers can use the emulation of Delphi set's in "DelphiSets.h" in the Source folder of the  Delphi2Cppinstallation. This file is a contribution from Daniel Flower. The set type "System::Set" can be renamed to TSet, be means of the list of substitutions of the translator.

The use of set's is translated as follows:

MySet: set of 'a'..'z';

->

System::Set <  char/* range 'a'..'z'*/, 97, 122 > MySet;

or

type TIntSet = set of 1..250; 

-> 

typedef System::Set <  int/* range 1..250*/, 1, 250 > TIntSet;

If there is no explicit type-declaration of a set, as e.g. in:

MySet := ['a','b','c'];

a helping macro and a helping type is created:

   typedef System::Set <  char, 97, 122 > test__0;

   #define test__1 ( test__0 () 

      << char ( 97 ) << char ( 98 ) << char ( 99 ) )

MySet = test__1;

The names of such helping types can be adjusted to according names in the C++ Builder VCL by means of the list of substitutions of the translator.

If a temporary set of values is passed as open array parameter to a function, a corresponding array is produced in the C++ output, which is put in front of the function call.

This page belongs to the Delphi2Cpp Documentation