[fpc-pascal] const records passed incorrectly

Jonas Maebe jonas.maebe at elis.ugent.be
Mon Nov 16 14:56:32 CET 2009

On 16 Nov 2009, at 14:50, Anthony Walter wrote:

> There is a problem with the above code on FPC when you change calling
> conventions of A.

Const indeed behaves differently depending on the calling convention.  
With register and stdcall, we emulate Delphi. With mwpascal, we  
emulate MetroWerks Pascal. With cdecl, we emulate C compilers. In C  
compilers, adding "const" does not change the way the parameter is  
passed: they are still passed by value. There have been lots of  
discussions in the past about adding something like constvar or  
constref, but nothing has ever come from it.


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