Functions - SQF: Difference between revisions

Latest revision as of 13:29, 24 July 2006

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Function

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-'''Description:'''
+#REDIRECT [[Function]]
-While script syntax (see [[exec]]) is line based, functions (see [[call]], [[execVM]], [[compile]], [[then]], [[do]]) are based on structured expressions and end-of-line has no special meaning, it is considered to be equivalent to space or semicolon and is therefore required even when ending line.
-'''Note:''' Scripts can do some things that are not possible in functions.<br>
-Scripts can wait suspended until some condition is met, they can also use goto to change execution point at any time.
-Main language contructs used in functions are:
-*[[if]]..[[then]]..[[else]]
-*[[while]]..[[do]]
-*Curled braces
-*Multiple commands (including assigment commands) are delimited with a semicolon.
-Result of the last expression evaluated is returned as a function result.<br>
-This can be nothing when a function returns no value.
-<b>Example 1</b> (max.sqf)
-comment "Return maximum of first and second argument";<br>
-[[private variableNameList|private]] {"_a","_b"};<br>
-_a = _this [[select]] 0;<br>
-_b = _this [[select]] 1;<br>
-if (_a>_b) [[then]] {_a} [[else]] {_b}
-<b>Example 2</b> (infantrySafe.sqf)
-comment "Switch all infantry units to safe mode";<br>
-{<br>
-[[if]] ([[vehicle]] _x == _x) [[then]]<br>
-{<br>
-_x [[setBehaviour]] "safe"<br>
-}<br>
-} [[forEach]] _this
-Due to line-based nature of scripts it is not possible to create multiline string constants in them.<br>
-To overcome this limitation you can store multiline in separate files and load them using [[loadFile]] or [[preprocessFile]] functions (the second uses C-like preprocessor with // or /* */ comments and #define macros).<br>
-Recommended file extension for functions is '''.SQF''' (as opposed to '''.SQS''' used for scripts).
-[[Category: Scripting_Topics ]]

Functions - SQF: Difference between revisions

Latest revision as of 13:29, 24 July 2006

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