Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

opApply example isn't compliant with spec #372

Open
wants to merge 7 commits into
base: master
Choose a base branch
from
Open

opApply example isn't compliant with spec #372

Changes from all commits
Commits
Show all changes
7 commits
Select commit Hold shift + click to select a range
27c6923
Make opApply example compliant with the spec
Inkrementator Oct 6, 2023
862a5dd
Make opApply example easier to copy/paste and run
Inkrementator Oct 6, 2023
e4a901c
opApply: Add example object for easier copy/paste
Inkrementator Oct 6, 2023
9ef3f59
Conciseness
Inkrementator Oct 6, 2023
db9442b
Style
Inkrementator Oct 6, 2023
7ebdb43
Style
Inkrementator Oct 6, 2023
e134cb0
Appropriate tags: scope + ref
Inkrementator Oct 6, 2023
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
22 changes: 14 additions & 8 deletions gems/opdispatch-opapply.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -40,18 +40,24 @@ over such a type will call `opApply` with a special
delegate as a parameter:

class Tree {
int val;
Tree lhs;
Tree rhs;
int opApply(int delegate(Tree) dg) {
if (lhs && lhs.opApply(dg)) return 1;
if (dg(this)) return 1;
if (rhs && rhs.opApply(dg)) return 1;
return 0;
this(int val, Tree lhs = null, Tree rhs = null) {
this.val = val;
this.lhs = lhs;
this.rhs = rhs;
}
int opApply(scope int delegate(ref Tree) dg) {
if (int res = lhs ? lhs.opApply(dg) : 0) return res;
if (int res = rhs ? rhs.opApply(dg) : 0) return res;
return dg(this);
}
}
Tree tree = new Tree;
foreach(node; tree) {
...
Tree tree = new Tree(5,
new Tree(3, new Tree(190)), new Tree(6));
foreach (node; tree) {
node.val.writeln;
}

The compiler transforms the `foreach` body to a special
Expand Down