Worst-case scenario: the UEd Goblin wipes the map and burns down your house.
Difference between revisions of "Compiler issues"
From Unreal Wiki, The Unreal Engine Documentation Site
m (→Parsing Issues: Swapped ...) |
m (→Parsing Issues) |
||
| Line 25: | Line 25: | ||
defaultproperties{ | defaultproperties{ | ||
}</uscript>}} | }</uscript>}} | ||
| + | |||
| + | '''Switch''' ''Issues related to the [[switch]] block'' when attempting to access DefaultProperties from a static function. | ||
| + | <br> | ||
| + | :Using the syntax Default.Identifier (to resolve a DefaultProperties reference from a static function) within a [[switch]] block confuses the compiler, which assumes the script has an error, and suggests 'default:', as in ''the default case'' for a switch statement. The error message is ''Error, Missing ':' in 'Default''. | ||
| + | |||
| + | {{CorrectWrong|<uscript> | ||
| + | // A workaround is necessary. | ||
| + | // Example using the class name directly.. | ||
| + | case 1: | ||
| + | Class'GameMessage'.Static.CallMe (); | ||
| + | break; | ||
| + | // ..or an if-else block to replace the switch-case statement.. | ||
| + | // ..or a local proxy variable: | ||
| + | static function Test (int Index) | ||
| + | { | ||
| + | local class<LocalMessage> ClassNameWorkaround; | ||
| + | ClassNameWorkaround = Default.ClassName; | ||
| + | // ... | ||
| + | case 1: | ||
| + | ClassNameWorkaround.Static.CallMe (); | ||
| + | break; | ||
| + | // ... | ||
| + | } | ||
| + | </uscript>|<uscript> | ||
| + | var class<LocalMessage> ClassName; | ||
| + | |||
| + | static function Test (int Index) | ||
| + | { | ||
| + | switch (Index) | ||
| + | { | ||
| + | case 1: | ||
| + | Default.ClassName.Static.CallMe (); | ||
| + | break; | ||
| + | |||
| + | default: | ||
| + | break; | ||
| + | } | ||
| + | } | ||
| + | |||
| + | DefaultProperties | ||
| + | { | ||
| + | ClassName = Class'GameMessage' | ||
| + | } | ||
| + | </uscript>}} | ||
Revision as of 19:22, 12 November 2011
Like any other compiler there are issues with the parsing therefor this page exists to mention those common issues and how to get around them.
Parsing Issues
Comment Issues related to the comments
- Having an end of multi-line comment proceeded by a line comment on the same line.
Correct and Wrong example
|
Correct |
Wrong |
/* if(!bUseForVehicles)
return Super.DamageTaken(Enemy, Injured);
else{//Branch4: Do vehicle code here, optimized?}
*//*local int LogInitHealth;*/ /*, LogDamage, LogConversion;*/ |
/* if(!bUseForVehicles)
return Super.DamageTaken(Enemy, Injured);
else{//Branch4: Do vehicle code here, optimized?}*//*local int LogInitHealth;*//*, LogDamage, LogConversion;*/ |
DefaultProperties Issues related to the defaultproperties block
- Placing a { on the same line of the defaultproperties declaration will cause the parser to skip the defaultproperties block thus :all of your default values will not be compiled, to get around this is easy just place the { on the next line!.
Correct and Wrong example
|
Correct |
Wrong |
defaultproperties { } |
defaultproperties{ } |
Switch Issues related to the switch block when attempting to access DefaultProperties from a static function.
- Using the syntax Default.Identifier (to resolve a DefaultProperties reference from a static function) within a switch block confuses the compiler, which assumes the script has an error, and suggests 'default:', as in the default case for a switch statement. The error message is Error, Missing ':' in 'Default.
Correct and Wrong example
|
Correct |
Wrong |
// A workaround is necessary. // Example using the class name directly.. case 1: Class'GameMessage'.Static.CallMe (); break; // ..or an if-else block to replace the switch-case statement.. // ..or a local proxy variable: static function Test (int Index) { local class<LocalMessage> ClassNameWorkaround; ClassNameWorkaround = Default.ClassName; // ... case 1: ClassNameWorkaround.Static.CallMe (); break; // ... } |
var class<LocalMessage> ClassName; static function Test (int Index) { switch (Index) { case 1: Default.ClassName.Static.CallMe (); break; default: break; } } DefaultProperties { ClassName = Class'GameMessage' } |
