Difference between revisions of "User Defined Function"
note about let and eval
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imported>Odessa (note about let and eval) |
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UDFs may optionally return a single value of any type, using the [[SetFunctionValue]] command within them. They may optionally accept one or more arguments of any type, which are defined within curly braces: | UDFs may optionally return a single value of any type, using the [[SetFunctionValue]] command within them. They may optionally accept one or more arguments of any type, which are defined within curly braces: | ||
<pre> | <pre> | ||
scn SomeUDF | |||
int arg1 ; * args are optional | int arg1 ; * args are optional | ||
ref arg2 | ref arg2 | ||
| Line 9: | Line 11: | ||
Begin Function { arg1, arg2, arg3... } | Begin Function { arg1, arg2, arg3... } | ||
; * | ; * do whatever like any other script | ||
End | End | ||
</pre> | </pre> | ||
and called in a similar way to regular functions: | and called in a similar way to regular functions: | ||
<pre> | <pre> | ||
scn SomeOtherScript | |||
... | |||
call SomeUDF arg1, arg2, arg3... | |||
</pre> | |||
let SomeVariable := | However, to assign the return to a variable, [[Let]] must be used rather than <b>set .. to ..</b>, and to use in a conditional, [[Eval|if eval]] rather than simply <b>if</b>: | ||
<pre> | |||
let SomeVariable := call SomeOtherUDF arg1 | |||
if eval (call SomeSuitableUDF) | if eval (call SomeSuitableUDF) | ||
| Line 79: | Line 86: | ||
*[[Eval]] | *[[Eval]] | ||
*[[Let]] | *[[Let]] | ||
*[[Script Compiler Override]] | |||
==External Links== | ==External Links== | ||
*[http://fallout.bethsoft.com/eng/links/privacyredirect.php?site=http://www.loverslab.com/topic/26802-tutorial-nvse4-part-2-user-defined-functions-udfs/ Tutorial on User Defined Functions in NVSE 4] | *[http://fallout.bethsoft.com/eng/links/privacyredirect.php?site=http://www.loverslab.com/topic/26802-tutorial-nvse4-part-2-user-defined-functions-udfs/ Tutorial on User Defined Functions in NVSE 4] | ||
[[Category:NVSE]] | [[Category:NVSE]] | ||