https://issues.dlang.org/show_bug.cgi?id=17655
Issue ID: 17655
Summary: Call parent class reference.
Product: D
Version: D2
Hardware: x86
OS: Linux
Status: NEW
Severity: normal
Priority: P1
Component: dmd
Assignee: [email protected]
Reporter: [email protected]
Created attachment 1651
--> https://issues.dlang.org/attachment.cgi?id=1651&action=edit
source code
Exxample:
class Node {
Node[] members;
Node parent;
void add_member(ref Node member) {
members ~= member;
member.parent = this;
}
}
class Char : Node {
}
class Image : Node {
}
Node root = new Char();
Char ch = new Char();
Image image = new Image();
root.add_member(ch);
root.add_member(ch);
root.add_member(ch);
root.add_member(image);
root.add_member(image);
root.add_member(image);
This is simple tree implementation:
Node
Char
Char
Char
Image
Image
Image
dmd compile it with error:
Error: function Node.add_member (ref Node member) is not callable using
argument types (Char)
I try casting, but also error:
root.add_member(cast(Node)ch);
I try pass by out and inout, but also error:
void add_member(out Node member) {...}
void add_member(inout Node member) {...}
What is true way?
I need change the property "parent" (Node.parent = this) and I think what pass
by reference is good (ref Node member). Or not?
--
