Tweak generate.Tuple and generate.Union

Leverage comptime fields to give generated Tuple a default value, allowing
TupleT and Tuple to be merged.

Only call generate.Tuple on the final output. This eliminates redundant
deduplication, and results in a simpler API (nested types just need to expose
a natural Zig tuple).

generate.Union leverages the new Tuple and removes unused features.

src/dom/character_data.zig

@@ -21,7 +21,6 @@ const std = @import("std");
 const jsruntime = @import("jsruntime");
 const Case = jsruntime.test_utils.Case;
 const checkCases = jsruntime.test_utils.checkCases;
-const generate = @import("../generate.zig");
 
 const parser = @import("netsurf");
 
@@ -32,12 +31,12 @@ const ProcessingInstruction = @import("processing_instruction.zig").ProcessingIn
 const HTMLElem = @import("../html/elements.zig");
 
 // CharacterData interfaces
-pub const Interfaces = generate.Tuple(.{
+pub const Interfaces = .{
     Comment,
     Text.Text,
     Text.Interfaces,
     ProcessingInstruction,
-});
+};
 
 // CharacterData implementation
 pub const CharacterData = struct {

src/dom/dom.zig

@@ -16,8 +16,6 @@
 // You should have received a copy of the GNU Affero General Public License
 // along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
-const generate = @import("../generate.zig");
-
 const DOMException = @import("exceptions.zig").DOMException;
 const EventTarget = @import("event_target.zig").EventTarget;
 const DOMImplementation = @import("implementation.zig").DOMImplementation;
@@ -27,7 +25,7 @@ const NodeList = @import("nodelist.zig");
 const Nod = @import("node.zig");
 const MutationObserver = @import("mutation_observer.zig");
 
-pub const Interfaces = generate.Tuple(.{
+pub const Interfaces = .{
     DOMException,
     EventTarget,
     DOMImplementation,
@@ -37,4 +35,4 @@ pub const Interfaces = generate.Tuple(.{
     Nod.Node,
     Nod.Interfaces,
     MutationObserver.Interfaces,
-});
+};

src/dom/mutation_observer.zig

@@ -26,15 +26,13 @@ const CallbackResult = jsruntime.CallbackResult;
 const Case = jsruntime.test_utils.Case;
 const checkCases = jsruntime.test_utils.checkCases;
 
-const generate = @import("../generate.zig");
-
 const NodeList = @import("nodelist.zig").NodeList;
 
-pub const Interfaces = generate.Tuple(.{
+pub const Interfaces = .{
     MutationObserver,
     MutationRecord,
     MutationRecords,
-});
+};
 
 const Walker = @import("../dom/walker.zig").WalkerChildren;
 

src/dom/node.zig

@@ -47,7 +47,7 @@ const HTML = @import("../html/html.zig");
 const HTMLElem = @import("../html/elements.zig");
 
 // Node interfaces
-pub const Interfaces = generate.Tuple(.{
+pub const Interfaces = .{
     Attr,
     CData.CharacterData,
     CData.Interfaces,
@@ -57,12 +57,10 @@ pub const Interfaces = generate.Tuple(.{
     DocumentFragment,
     HTMLCollection,
     HTMLCollectionIterator,
-
     HTML.Interfaces,
-});
-const Generated = generate.Union.compile(Interfaces);
-pub const Union = Generated._union;
-pub const Tags = Generated._enum;
+};
+
+pub const Union = generate.Union(Interfaces);
 
 // Node implementation
 pub const Node = struct {

src/dom/nodelist.zig

@@ -25,7 +25,6 @@ const Callback = jsruntime.Callback;
 const CallbackResult = jsruntime.CallbackResult;
 const Case = jsruntime.test_utils.Case;
 const checkCases = jsruntime.test_utils.checkCases;
-const generate = @import("../generate.zig");
 
 const NodeUnion = @import("node.zig").Union;
 const Node = @import("node.zig").Node;
@@ -36,10 +35,10 @@ const log = std.log.scoped(.nodelist);
 
 const DOMException = @import("exceptions.zig").DOMException;
 
-pub const Interfaces = generate.Tuple(.{
+pub const Interfaces = .{
     NodeListIterator,
     NodeList,
-});
+};
 
 pub const NodeListIterator = struct {
     pub const mem_guarantied = true;

src/dom/text.zig

@@ -21,7 +21,6 @@ const std = @import("std");
 const jsruntime = @import("jsruntime");
 const Case = jsruntime.test_utils.Case;
 const checkCases = jsruntime.test_utils.checkCases;
-const generate = @import("../generate.zig");
 
 const parser = @import("netsurf");
 
@@ -31,9 +30,9 @@ const CDATASection = @import("cdata_section.zig").CDATASection;
 const UserContext = @import("../user_context.zig").UserContext;
 
 // Text interfaces
-pub const Interfaces = generate.Tuple(.{
+pub const Interfaces = .{
     CDATASection,
-});
+};
 
 pub const Text = struct {
     pub const Self = parser.Text;