register: what changed
Revision 0 to 1. Removed lines have a minus sign; added lines have a plus sign.
Title: Register
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|---|---|---|---|
| 1 | + | Back to [[Reserved words|reserved words]] | |
| 2 | + | ||
| 3 | + | The [[modifier]] **register**: | |
| 4 | + | ||
| 5 | + | - belongs to the calling conventions of internal and external subroutines; | |
| 6 | + | - is for compatibility with Delphi; | |
| 7 | + | - has been supported since FPC 1.9.x; | |
| 8 | + | - is used to call the first three parameters in the register. | |
| 9 | + | ||
| 10 | + | Example: | |
| 11 | + | ||
| 12 | + | ``` pascal | |
| 13 | + | function subTest: string; [register]; | |
| 14 | + | begin | |
| 15 | + | subTest: = 'abc'; | |
| 16 | + | end; | |
| 17 | + | ``` | |
| 18 | + | ||
| 19 | + | Example 2: | |
| 20 | + | ||
| 21 | + | ``` pascal | |
| 22 | + | function funcTest (strTestdaten: Pchar): LongWord; register; external 'Test.dll'; | |
| 23 | + | ``` | |
| 24 | + | ||
| 25 | + | --- | |
| 26 | + | *From the Free Pascal wiki, page "Register", as it stood on 2020-02-25 after a change by Trev, out of the wiki's dump of 2024-05-26. Copyright stays with the author who wrote it, according to the old wiki's [[Licensing]] page. If you have concerns about this material, [message the admin](/wiki-contact).* |