Sven Barth via fpc-devel wrote:
There is no full documentation for that parameter modifier (someone
might want to file a bug report for that), but the documentation for
“const” (
https://www.freepascal.org/docs-html/current/ref/refsu67.html#x183-20700014.4.4
) contains this:
=== doc begin ===
Contrary to Delphi, no assumptions should be made about how const
parameters are passed to the underlying routine. In particular, the
assumption that parameters with large size are passed by reference is
not correct. For this the constref parameter type should be used, which
is available as of version 2.5.1 of the compiler.
=== doc end ===
On debate, see FPC issue 17442.
Regards,
Adriaan van Os
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