5 files changed, 14 insertions, 11 deletions
diff --git a/src/eval/html/Content.zig b/src/eval/html/Content.zig
index 96961da..7b9da3e 100644
--- a/src/eval/html/Content.zig
+++ b/src/eval/html/Content.zig
@@ -28,7 +28,7 @@ pub fn init(alloc: Allocator, tag: []const u8) Error!*Self {
 }
 
 pub fn element(self: *Self) Element {
-    return (Element.Wrapper(Self){ .ptr = self }).element();
+    return Element.Wrapper(Self, render).init(self);
 }
 
 fn fromNode(context: *anyopaque) Element {
@@ -36,7 +36,7 @@ fn fromNode(context: *anyopaque) Element {
     return self.element();
 }
 
-pub fn render(self: *Self, alloc: Allocator) Error![]const u8 {
+fn render(self: *Self, alloc: Allocator) Error![]const u8 {
     var base = self.base;
     const b = try base.element().render(alloc);
     defer alloc.free(b);
diff --git a/src/eval/html/Element.zig b/src/eval/html/Element.zig
index 52ee58d..dd24bea 100644
--- a/src/eval/html/Element.zig
+++ b/src/eval/html/Element.zig
@@ -11,13 +11,12 @@ pub const Root = @import("Root.zig");
 
 pub const Error = html.Error || Allocator.Error;
 
-pub fn Wrapper(comptime V: type) type {
+pub fn Wrapper(comptime V: type, comptime r: *const fn (*V, Allocator) Error![]const u8) type {
     comptime {
         if (!@hasField(V, "node")) @compileError("missing field 'node' for " ++ @typeName(V));
         const nd = @FieldType(V, "node");
         if (nd != Node) @compileError("invalid node's type: " ++ @typeName(nd) ++ ", want " ++ @typeName(Node));
         if (!std.meta.hasMethod(V, "element")) @compileError("missing declaration 'element' for " ++ @typeName(V));
-        if (!std.meta.hasMethod(V, "render")) @compileError("missing declaration 'render' for " ++ @typeName(V));
     }
     return struct {
         ptr: *V,
@@ -31,7 +30,11 @@ pub fn Wrapper(comptime V: type) type {
 
         fn render(context: *anyopaque, alloc: Allocator) Error![]const u8 {
             const self: *V = @ptrCast(@alignCast(context));
-            return try self.render(alloc);
+            return try r(self, alloc);
+        }
+
+        pub fn init(ptr: *V) Element {
+            return (Self{ .ptr = ptr }).element();
         }
 
         pub fn element(self: Self) Element {
diff --git a/src/eval/html/Literal.zig b/src/eval/html/Literal.zig
index 9d6d91e..a5eb199 100644
--- a/src/eval/html/Literal.zig
+++ b/src/eval/html/Literal.zig
@@ -28,7 +28,7 @@ pub fn initNoEscape(alloc: Allocator, literal: []const u8) Error!*Element.Litera
 }
 
 pub fn element(self: *Self) Element {
-    return (Element.Wrapper(Self){ .ptr = self }).element();
+    return Element.Wrapper(Self, render).init(self);
 }
 
 fn fromNode(context: *anyopaque) Element {
@@ -36,6 +36,6 @@ fn fromNode(context: *anyopaque) Element {
     return self.element();
 }
 
-pub fn render(self: *Self, alloc: Allocator) Error![]const u8 {
+fn render(self: *Self, alloc: Allocator) Error![]const u8 {
     return try alloc.dupe(u8, self.literal);
 }
diff --git a/src/eval/html/Root.zig b/src/eval/html/Root.zig
index 6c4c37a..af130d1 100644
--- a/src/eval/html/Root.zig
+++ b/src/eval/html/Root.zig
@@ -28,7 +28,7 @@ pub fn deinit(self: *Self) void {
 }
 
 pub fn element(self: *Self) Element {
-    return (Element.Wrapper(Self){ .ptr = self }).element();
+    return Element.Wrapper(Self, render).init(self);
 }
 
 pub fn allocator(self: *Self) Allocator {
@@ -50,7 +50,7 @@ fn fromNode(context: *anyopaque) Element {
     return self.element();
 }
 
-pub fn render(self: *Self, alloc: Allocator) Error![]const u8 {
+fn render(self: *Self, alloc: Allocator) Error![]const u8 {
     if (self.content.first == null) return "";
     var acc = try std.ArrayList(u8).initCapacity(alloc, 8);
     errdefer acc.deinit(alloc);
diff --git a/src/eval/html/Void.zig b/src/eval/html/Void.zig
index 431536c..17b369d 100644
--- a/src/eval/html/Void.zig
+++ b/src/eval/html/Void.zig
@@ -30,7 +30,7 @@ pub fn init(alloc: Allocator, tag: []const u8) Error!*Self {
 }
 
 pub fn element(self: *Self) Element {
-    return (Element.Wrapper(Self){ .ptr = self }).element();
+    return Element.Wrapper(Self, render).init(self);
 }
 
 pub fn setAttribute(self: *Self, k: []const u8, v: []const u8) Error!void {
@@ -62,7 +62,7 @@ fn fromNode(context: *anyopaque) Element {
     return self.element();
 }
 
-pub fn render(self: *Self, alloc: Allocator) Error![]const u8 {
+fn render(self: *Self, alloc: Allocator) Error![]const u8 {
     const attr = try renderAttribute(alloc, &self.attributes, &self.class_list);
     defer if (attr) |it| alloc.free(it);
     var acc = try List(u8).initCapacity(alloc, self.tag.len + 2);