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5f7fba054f
The EN page only showed the two-argument form. Document the optional third argument, which admits protected and private functions when nonzero (matching the implementation in interpret.cc and the existing zh-CN page), and fix the SYNOPSYS -> SYNOPSIS heading typo. Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
1,016 B
1,016 B
| title |
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| system / function_exists |
function_exists
NAME
function_exists() - find the file containing a given function in an
object
SYNOPSIS
string function_exists( string str, object ob );
string function_exists( string str, object ob, int flag );
DESCRIPTION
Return the file name of the object that defines the function 'str' in
object 'ob'. The returned value can be other than 'file_name(ob)' if
the function is defined by an inherited object.
0 is returned if the function was not defined.
By default, functions that cannot be called from outside the object
(protected and private functions) are treated as not defined. If
'flag' is specified and is nonzero, such functions are reported as
well.
Note that function_exists() does not check shadows.
If no object is passed as the second argument, this efun will default
to this_object().
SEE ALSO
call_other(3), call_out(3), functionp(3), valid_shadow(4)