[fpc-devel] constref in Windows

Jonas Maebe jonas.maebe at elis.ugent.be
Sat Nov 20 11:53:51 CET 2010

On 19 Nov 2010, at 17:56, Paul Ishenin wrote:

> 19.11.2010 23:47, Jonas Maebe wrote:
>> Well, it could be done since "const" is implementation-dependent, but it would force all non-x86 platforms to pass all const parameters by reference by default, which may not be desirable from an efficiency point of view.
> As I understand not all const parameters are passed by reference in delphi stdcall implementation but only records? Or say integer/byte will be passed by reference too?

You proposed to make "const = constref on stdcall convention". constref passes everything by reference (that's the literal meaning of the keyword "const argument by reference").

Also, the default calling convention on non-x86 platforms is supposed to be compliant with the default ABI of the platform. Many of these platforms pass small records all by value (const or not).


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