135 lines
6.3 KiB
HTML
135 lines
6.3 KiB
HTML
|
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
||
|
|
<html xmlns="http://www.w3.org/1999/xhtml">
|
||
|
|
<head>
|
||
|
|
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
|
||
|
|
<meta http-equiv="X-UA-Compatible" content="IE=9"/>
|
||
|
|
<meta name="generator" content="Doxygen 1.8.18"/>
|
||
|
|
<meta name="viewport" content="width=device-width, initial-scale=1"/>
|
||
|
|
<title>AngelScript: Function overloading</title>
|
||
|
|
<link href="tabs.css" rel="stylesheet" type="text/css"/>
|
||
|
|
<script type="text/javascript" src="jquery.js"></script>
|
||
|
|
<script type="text/javascript" src="dynsections.js"></script>
|
||
|
|
<link href="navtree.css" rel="stylesheet" type="text/css"/>
|
||
|
|
<script type="text/javascript" src="resize.js"></script>
|
||
|
|
<script type="text/javascript" src="navtreedata.js"></script>
|
||
|
|
<script type="text/javascript" src="navtree.js"></script>
|
||
|
|
<link href="search/search.css" rel="stylesheet" type="text/css"/>
|
||
|
|
<script type="text/javascript" src="search/searchdata.js"></script>
|
||
|
|
<script type="text/javascript" src="search/search.js"></script>
|
||
|
|
<script type="text/javascript">
|
||
|
|
/* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt GPL-v2 */
|
||
|
|
$(document).ready(function() { init_search(); });
|
||
|
|
/* @license-end */
|
||
|
|
</script>
|
||
|
|
<link href="doxygen.css" rel="stylesheet" type="text/css" />
|
||
|
|
</head>
|
||
|
|
<body>
|
||
|
|
<div id="top"><!-- do not remove this div, it is closed by doxygen! -->
|
||
|
|
<div id="titlearea">
|
||
|
|
<table cellspacing="0" cellpadding="0">
|
||
|
|
<tbody>
|
||
|
|
<tr style="height: 56px;">
|
||
|
|
<td id="projectlogo"><img alt="Logo" src="aslogo_small.png"/></td>
|
||
|
|
<td id="projectalign" style="padding-left: 0.5em;">
|
||
|
|
<div id="projectname">AngelScript
|
||
|
|
</div>
|
||
|
|
</td>
|
||
|
|
<td> <div id="MSearchBox" class="MSearchBoxInactive">
|
||
|
|
<span class="left">
|
||
|
|
<img id="MSearchSelect" src="search/mag_sel.png"
|
||
|
|
onmouseover="return searchBox.OnSearchSelectShow()"
|
||
|
|
onmouseout="return searchBox.OnSearchSelectHide()"
|
||
|
|
alt=""/>
|
||
|
|
<input type="text" id="MSearchField" value="Search" accesskey="S"
|
||
|
|
onfocus="searchBox.OnSearchFieldFocus(true)"
|
||
|
|
onblur="searchBox.OnSearchFieldFocus(false)"
|
||
|
|
onkeyup="searchBox.OnSearchFieldChange(event)"/>
|
||
|
|
</span><span class="right">
|
||
|
|
<a id="MSearchClose" href="javascript:searchBox.CloseResultsWindow()"><img id="MSearchCloseImg" border="0" src="search/close.png" alt=""/></a>
|
||
|
|
</span>
|
||
|
|
</div>
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
</tbody>
|
||
|
|
</table>
|
||
|
|
</div>
|
||
|
|
<!-- end header part -->
|
||
|
|
<!-- Generated by Doxygen 1.8.18 -->
|
||
|
|
<script type="text/javascript">
|
||
|
|
/* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt GPL-v2 */
|
||
|
|
var searchBox = new SearchBox("searchBox", "search",false,'Search');
|
||
|
|
/* @license-end */
|
||
|
|
</script>
|
||
|
|
</div><!-- top -->
|
||
|
|
<div id="side-nav" class="ui-resizable side-nav-resizable">
|
||
|
|
<div id="nav-tree">
|
||
|
|
<div id="nav-tree-contents">
|
||
|
|
<div id="nav-sync" class="sync"></div>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div id="splitbar" style="-moz-user-select:none;"
|
||
|
|
class="ui-resizable-handle">
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<script type="text/javascript">
|
||
|
|
/* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt GPL-v2 */
|
||
|
|
$(document).ready(function(){initNavTree('doc_script_func_overload.html',''); initResizable(); });
|
||
|
|
/* @license-end */
|
||
|
|
</script>
|
||
|
|
<div id="doc-content">
|
||
|
|
<!-- window showing the filter options -->
|
||
|
|
<div id="MSearchSelectWindow"
|
||
|
|
onmouseover="return searchBox.OnSearchSelectShow()"
|
||
|
|
onmouseout="return searchBox.OnSearchSelectHide()"
|
||
|
|
onkeydown="return searchBox.OnSearchSelectKey(event)">
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<!-- iframe showing the search results (closed by default) -->
|
||
|
|
<div id="MSearchResultsWindow">
|
||
|
|
<iframe src="javascript:void(0)" frameborder="0"
|
||
|
|
name="MSearchResults" id="MSearchResults">
|
||
|
|
</iframe>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<div class="PageDoc"><div class="header">
|
||
|
|
<div class="headertitle">
|
||
|
|
<div class="title">Function overloading </div> </div>
|
||
|
|
</div><!--header-->
|
||
|
|
<div class="contents">
|
||
|
|
<div class="textblock"><p>Function overloading happens when more than one function with the same name is declared with different parameters. This is a useful feature when an operation needs to be able to work with different types of input, yet produce similar result.</p>
|
||
|
|
<p>The compiler is able to resolve which function to call by matching the type of each argument expression to the function parameter, and eliminating the functions where there is no possible conversion available. The compiler will do this for each argument from first to last. When all arguments have been evaluated only one function should be the best match, otherwise the compiler will give an error about the impossibility to determine the correct function to call.</p>
|
||
|
|
<p>The type of conversion that needs to be performed on the argument to get to the type of the parameter determines how well a function matches. The following list gives the order of how one type of conversion compares to another.</p>
|
||
|
|
<ul>
|
||
|
|
<li>no conversion needed</li>
|
||
|
|
<li>conversion to const</li>
|
||
|
|
<li>size of primitive changes</li>
|
||
|
|
<li>integer type to float type and vice versa</li>
|
||
|
|
<li>reference cast</li>
|
||
|
|
<li>object to primitive conversion</li>
|
||
|
|
<li>conversion to object</li>
|
||
|
|
<li>variable argument type</li>
|
||
|
|
</ul>
|
||
|
|
<p>Observe that it is not possible to create overloads where the only difference is the return type. This is because the return type is not part of the selection criteria that the compiler uses to determine which function to call, the return type is just the result of the called function.</p>
|
||
|
|
<pre>
|
||
|
|
void Function(int a, float b, string c) {}
|
||
|
|
void Function(string a, int b, float c) {}
|
||
|
|
void Function(float a, string b, int c) {}</pre><pre> void main()
|
||
|
|
{
|
||
|
|
Function(1, 2.5f, 'a'); // Will call the first overload
|
||
|
|
Function('a', 1, 2.5f); // Will call the second overload
|
||
|
|
Function(2.5f, 'a', 1); // Will call the third overload
|
||
|
|
}
|
||
|
|
</pre> </div></div><!-- contents -->
|
||
|
|
</div><!-- PageDoc -->
|
||
|
|
</div><!-- doc-content -->
|
||
|
|
<!-- start footer part -->
|
||
|
|
<div id="nav-path" class="navpath"><!-- id is needed for treeview function! -->
|
||
|
|
<ul>
|
||
|
|
<li class="footer">Generated on Sat Dec 5 2020 23:20:24 for AngelScript by
|
||
|
|
<a href="http://www.doxygen.org/index.html">
|
||
|
|
<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.8.18 </li>
|
||
|
|
</ul>
|
||
|
|
</div>
|
||
|
|
</body>
|
||
|
|
</html>
|