Difference between revisions of "Return"
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Lady Sumoku (talk | contribs) m (Replaced old <LSL> block with <source lang="lsl2">) |
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}}{{#vardefine:examples| | }}{{#vardefine:examples| | ||
< | <source lang="lsl2">integer Goodbye() | ||
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llOwnerSay("Goodbye"); | llOwnerSay("Goodbye"); | ||
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llOwnerSay("meh"); | llOwnerSay("meh"); | ||
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integer Calc (string cmd, integer a, integer b) | integer Calc (string cmd, integer a, integer b) | ||
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}}{{#vardefine:notes| | }}{{#vardefine:notes| | ||
}}{{#vardefine:caveats|*There is a bug in the compiler and it will let you return a value with events, which when encountered at runtime will cause the script to crash. | }}{{#vardefine:caveats|*There is a bug in the compiler and it will let you return a value with events, which when encountered at runtime will cause the script to crash. | ||
Revision as of 00:56, 22 January 2015
| LSL Portal | Functions | Events | Types | Operators | Constants | Flow Control | Script Library | Categorized Library | Tutorials |
- The correct title of this article is return. The initial letter is shown capitalized due to technical restrictions.
return value;
return value;| • type | value | – | value or variable to be returned by the function, the type must be the same as that to be returned by the function. |
Used to return execution to the previous scope along with a value.
Functions
- Exits the function and continues script execution in the previous scope.
Events
- Causes the script to crash. Events cannot return a value. Use the next form of this keyword instead.
return;
Used to prematurely return execution to the previous scope before reaching the end of the function/event. You do not need to use this at the end of an event or function, as it is assumed by the compiler.
Functions
- Exits the function and continues script execution in the previous scope.
Events
- Exits the event and removes it from the event queue. If there is another event in the queue, that event is triggered.
Caveats
- There is a bug in the compiler and it will let you return a value with events, which when encountered at runtime will cause the script to crash.
- Do not try to return a value in the event scope if you do not wish your script to crash.
Examples
integer Goodbye()
{
llOwnerSay("Goodbye");
return 0;
}
Hello()
{
llOwnerSay("Hello");
return;
}
meh()
{
llOwnerSay("meh");
}
integer Calc (string cmd, integer a, integer b)
{
// The user function has been declared as returning an integer,
// so every return within the function must return an integer
if (cmd == "+") return a + b;
// We don't need to code 'else' here, as the preceding statement resulted in 'return' when true
if (cmd == "-") return a - b;
if (cmd == "*") return a * b;
if (cmd == "/") return a / b;
// We must return a value here too, we can't omit the final return
return -1;
}
default
{
state_entry()
{
llSay(0, llList2CSV ( [ Calc("+",1,2), Calc ("-",5,3), Calc ("*",3,4), Calc("/",18,6) ] ) );
}
}