Mode ObjFPC: what changed
Revision 0 to 1. Removed lines have a minus sign; added lines have a plus sign.
Title: Mode ObjFPC
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| 1 | + | The mode **ObjFPC**, switched on with `{$mode objfpc}` in [[Source code|source code]], or `-Mobjfpc` on the [[Command-line interface|command line]], is the default mode for [[Lazarus]] source files (the default [[Compiler Mode|compiler mode]] when not using Lazarus is [[Mode FPC|FPC mode]]). | |
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| 3 | + | Using the ObjFPC mode has the following consequences: | |
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| 5 | + | 1. The [[@|address operator]] has to be used to assign procedural variables. Use `{$modeswitch classicProcVars+}` to disable this requirement. | |
| 6 | + | 2. A [[Forward|forward declaration]] must be repeated exactly the same by the [[Implementation|implementation]] of a [[Function|function]]/[[Procedure|procedure]]. In particular, parameters cannot be omitted when implementing the function or procedure, and the calling convention must be repeated as well. | |
| 7 | + | 3. [[Overload|Overloading]] of functions is allowed. | |
| 8 | + | 4. Nested [[Comments|comments]] are allowed. | |
| 9 | + | 5. The [[Objpas]] unit is loaded right after the system unit. One of the consequences of this is that the [[Integer|type integer]] is redefined as [[Longint|longint]]. | |
| 10 | + | 6. The [[Cvar|cvar]] type may be used. | |
| 11 | + | 7. [[PChar|PChars]] are converted to [[String|strings]] automatically. | |
| 12 | + | 8. Parameters in class methods cannot have the same names as class properties. | |
| 13 | + | 9. Strings are [[Shortstring|shortstrings]] by default. This may be changed by using the `-Sh` command line switch or the `{$H+}` switch. | |
| 14 | + | 10. [[Exceptions]], [[Class|classes]] and [[Interfaces]] are enabled. | |
| 15 | + | 11. Inline code is allowed: There is no need to enable it with the `{$INLINE}` directive. | |
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| 17 | + | --- | |
| 18 | + | *From the Free Pascal wiki, page "Mode ObjFPC", as it stood on 2022-08-06 after a change by Kai Burghardt, 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).* |