add parent section

build.zig.zon

@@ -11,8 +11,8 @@
             .hash = "122014e78d7c69d93595993b3231f3141368e22634b332b0b91a2fb73a8570f147a5",
         },
         .superhtml = .{
-            .url = "git+https://github.com/kristoff-it/superhtml#2f9752ab220b0cdde99994d6e20e2c5768585ca3",
-            .hash = "12202ea116df868225aacf87182bd9bb7ebd6815230399ffbb22afbc061c4a21ee3a",
+            .url = "git+https://github.com/kristoff-it/superhtml#3edb67236291d45ba97a79cdac3b91692487a352",
+            .hash = "1220879d0db55e043907b1af7623d93c6be80f27e3af75e35c85fa85e3823f52c922",
         },
         .ziggy = .{
             .url = "git+https://github.com/kristoff-it/ziggy#c66f47bc632c66668d61fa06eda112b41d6e5130",

src/context/Page.zig

@@ -430,6 +430,36 @@ pub const Builtins = struct {
         }
     };
 
+    pub const parentSection = struct {
+        pub const signature: Signature = .{ .ret = .Page };
+        pub const description =
+            \\Returns the parent section of a page. 
+            \\
+            \\It's always an error to call this function on the site's main 
+            \\index page as it doesn't have a parent section.
+        ;
+        pub const examples =
+            \\$page.parentSection()
+        ;
+        pub fn call(
+            self: *const Page,
+            gpa: Allocator,
+            args: []const Value,
+        ) !Value {
+            _ = gpa;
+            if (args.len != 0) return .{ .err = "expected 0 arguments" };
+            const p = self._meta.parent_section_path orelse return .{
+                .err = "root index page has no parent path",
+            };
+            return context.pageFind(.{
+                .ref = .{
+                    .path = p,
+                    .site = self._meta.site,
+                },
+            });
+        }
+    };
+
     pub const isSection = struct {
         pub const signature: Signature = .{ .ret = .Bool };
         pub const description =