diff --git a/include/wabt/ir.h b/include/wabt/ir.h
index 35f6593571..62d77f9117 100644
--- a/include/wabt/ir.h
+++ b/include/wabt/ir.h
@@ -1378,6 +1378,8 @@ class ScriptModule {
   ScriptModuleType type() const { return type_; }
   virtual const Location& location() const = 0;
 
+  bool is_definition;
+
  protected:
   explicit ScriptModule(ScriptModuleType type) : type_(type) {}
 
@@ -1506,6 +1508,7 @@ class CommandMixin : public Command {
 class ModuleCommand : public CommandMixin<CommandType::Module> {
  public:
   Module module;
+  bool is_definition;
 };
 
 class ScriptModuleCommand : public CommandMixin<CommandType::ScriptModule> {
diff --git a/include/wabt/token.def b/include/wabt/token.def
index 70c5481d5e..c400d7e379 100644
--- a/include/wabt/token.def
+++ b/include/wabt/token.def
@@ -34,6 +34,7 @@ WABT_TOKEN(Bin, "bin")
 WABT_TOKEN(Item, "item")
 WABT_TOKEN(Data, "data")
 WABT_TOKEN(Declare, "declare")
+WABT_TOKEN(Definition, "definition")
 WABT_TOKEN(Delegate, "delegate")
 WABT_TOKEN(Do, "do")
 WABT_TOKEN(Either, "either")
diff --git a/src/binary-writer-spec.cc b/src/binary-writer-spec.cc
index edcf0ba58f..934bbf8365 100644
--- a/src/binary-writer-spec.cc
+++ b/src/binary-writer-spec.cc
@@ -471,6 +471,11 @@ void BinaryWriterSpec::WriteCommands() {
       case CommandType::Module: {
         const Module& module = cast<ModuleCommand>(command)->module;
         std::string filename = GetModuleFilename(kWasmExtension);
+        if (cast<ModuleCommand>(command)->is_definition) {
+          WriteKey("definition");
+          WriteString("true");
+          WriteSeparator();
+        }
         WriteLocation(module.loc);
         WriteSeparator();
         if (!module.name.empty()) {
@@ -488,8 +493,14 @@ void BinaryWriterSpec::WriteCommands() {
 
       case CommandType::ScriptModule: {
         auto* script_module_command = cast<ScriptModuleCommand>(command);
+        auto* script_module = script_module_command->script_module.get();
         const auto& module = script_module_command->module;
         std::string filename = GetModuleFilename(kWasmExtension);
+        if (script_module->is_definition) {
+          WriteKey("definition");
+          WriteString("true");
+          WriteSeparator();
+        }
         WriteLocation(module.loc);
         WriteSeparator();
         if (!module.name.empty()) {
@@ -499,7 +510,7 @@ void BinaryWriterSpec::WriteCommands() {
         }
         WriteKey("filename");
         WriteEscapedString(GetBasename(filename));
-        WriteScriptModule(filename, *script_module_command->script_module);
+        WriteScriptModule(filename, *script_module);
         num_modules_++;
         last_module_index = i;
         break;
diff --git a/src/lexer-keywords.txt b/src/lexer-keywords.txt
index b72a37a662..37b350da19 100644
--- a/src/lexer-keywords.txt
+++ b/src/lexer-keywords.txt
@@ -46,6 +46,7 @@ code, TokenType::Code
 data.drop, TokenType::DataDrop, Opcode::DataDrop
 data, TokenType::Data
 declare, TokenType::Declare
+definition, TokenType::Definition
 delegate, TokenType::Delegate
 do, TokenType::Do
 drop, TokenType::Drop, Opcode::Drop
diff --git a/src/prebuilt/lexer-keywords.cc b/src/prebuilt/lexer-keywords.cc
index aec1ac50af..95150d3c76 100644
--- a/src/prebuilt/lexer-keywords.cc
+++ b/src/prebuilt/lexer-keywords.cc
@@ -223,7 +223,7 @@ Perfect_Hash::InWordSet (const char *str, size_t len)
 {
   enum
     {
-      TOTAL_KEYWORDS = 610,
+      TOTAL_KEYWORDS = 611,
       MIN_WORD_LENGTH = 2,
       MAX_WORD_LENGTH = 35,
       MIN_HASH_VALUE = 30,
@@ -240,782 +240,784 @@ Perfect_Hash::InWordSet (const char *str, size_t len)
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""},
-#line 154 "src/lexer-keywords.txt"
+#line 155 "src/lexer-keywords.txt"
       {"f64", Type::F64},
       {""}, {""},
 #line 47 "src/lexer-keywords.txt"
       {"data", TokenType::Data},
       {""}, {""}, {""}, {""},
-#line 466 "src/lexer-keywords.txt"
+#line 467 "src/lexer-keywords.txt"
       {"i64", Type::I64},
       {""}, {""}, {""},
-#line 557 "src/lexer-keywords.txt"
+#line 558 "src/lexer-keywords.txt"
       {"mut", TokenType::Mut},
       {""}, {""}, {""},
-#line 124 "src/lexer-keywords.txt"
+#line 125 "src/lexer-keywords.txt"
       {"f32x4", TokenType::F32X4},
       {""}, {""},
-#line 137 "src/lexer-keywords.txt"
+#line 138 "src/lexer-keywords.txt"
       {"f64.ge", TokenType::Compare, Opcode::F64Ge},
-#line 76 "src/lexer-keywords.txt"
+#line 77 "src/lexer-keywords.txt"
       {"f32.ge", TokenType::Compare, Opcode::F32Ge},
-#line 139 "src/lexer-keywords.txt"
+#line 140 "src/lexer-keywords.txt"
       {"f64.le", TokenType::Compare, Opcode::F64Le},
-#line 78 "src/lexer-keywords.txt"
+#line 79 "src/lexer-keywords.txt"
       {"f32.le", TokenType::Compare, Opcode::F32Le},
       {""},
-#line 366 "src/lexer-keywords.txt"
+#line 367 "src/lexer-keywords.txt"
       {"i32x4", TokenType::I32X4},
-#line 147 "src/lexer-keywords.txt"
+#line 148 "src/lexer-keywords.txt"
       {"f64.ne", TokenType::Compare, Opcode::F64Ne},
-#line 86 "src/lexer-keywords.txt"
+#line 87 "src/lexer-keywords.txt"
       {"f32.ne", TokenType::Compare, Opcode::F32Ne},
       {""}, {""},
-#line 146 "src/lexer-keywords.txt"
+#line 147 "src/lexer-keywords.txt"
       {"f64.neg", TokenType::Unary, Opcode::F64Neg},
-#line 85 "src/lexer-keywords.txt"
+#line 86 "src/lexer-keywords.txt"
       {"f32.neg", TokenType::Unary, Opcode::F32Neg},
-#line 556 "src/lexer-keywords.txt"
+#line 557 "src/lexer-keywords.txt"
       {"module", TokenType::Module},
-#line 579 "src/lexer-keywords.txt"
+#line 580 "src/lexer-keywords.txt"
       {"return", TokenType::Return, Opcode::Return},
-#line 442 "src/lexer-keywords.txt"
+#line 443 "src/lexer-keywords.txt"
       {"i64.ne", TokenType::Compare, Opcode::I64Ne},
-#line 299 "src/lexer-keywords.txt"
+#line 300 "src/lexer-keywords.txt"
       {"i32.ne", TokenType::Compare, Opcode::I32Ne},
-#line 138 "src/lexer-keywords.txt"
+#line 139 "src/lexer-keywords.txt"
       {"f64.gt", TokenType::Compare, Opcode::F64Gt},
-#line 77 "src/lexer-keywords.txt"
+#line 78 "src/lexer-keywords.txt"
       {"f32.gt", TokenType::Compare, Opcode::F32Gt},
-#line 141 "src/lexer-keywords.txt"
+#line 142 "src/lexer-keywords.txt"
       {"f64.lt", TokenType::Compare, Opcode::F64Lt},
-#line 80 "src/lexer-keywords.txt"
+#line 81 "src/lexer-keywords.txt"
       {"f32.lt", TokenType::Compare, Opcode::F32Lt},
       {""}, {""},
-#line 572 "src/lexer-keywords.txt"
+#line 573 "src/lexer-keywords.txt"
       {"ref.null", TokenType::RefNull, Opcode::RefNull},
-#line 102 "src/lexer-keywords.txt"
+#line 103 "src/lexer-keywords.txt"
       {"f32x4.ge", TokenType::Compare, Opcode::F32X4Ge},
       {""},
-#line 104 "src/lexer-keywords.txt"
+#line 105 "src/lexer-keywords.txt"
       {"f32x4.le", TokenType::Compare, Opcode::F32X4Le},
-#line 110 "src/lexer-keywords.txt"
+#line 111 "src/lexer-keywords.txt"
       {"f32x4.neg", TokenType::Unary, Opcode::F32X4Neg},
 #line 37 "src/lexer-keywords.txt"
       {"br", TokenType::Br, Opcode::Br},
-#line 50 "src/lexer-keywords.txt"
+#line 51 "src/lexer-keywords.txt"
       {"do", TokenType::Do},
-#line 111 "src/lexer-keywords.txt"
+#line 112 "src/lexer-keywords.txt"
       {"f32x4.ne", TokenType::Compare, Opcode::F32X4Ne},
       {""}, {""},
-#line 574 "src/lexer-keywords.txt"
+#line 575 "src/lexer-keywords.txt"
       {"result", TokenType::Result},
       {""},
-#line 351 "src/lexer-keywords.txt"
+#line 352 "src/lexer-keywords.txt"
       {"i32x4.neg", TokenType::Unary, Opcode::I32X4Neg},
 #line 45 "src/lexer-keywords.txt"
       {"code", TokenType::Code},
-#line 332 "src/lexer-keywords.txt"
+#line 333 "src/lexer-keywords.txt"
       {"i32x4.ge_u", TokenType::Compare, Opcode::I32X4GeU},
-#line 352 "src/lexer-keywords.txt"
+#line 353 "src/lexer-keywords.txt"
       {"i32x4.ne", TokenType::Compare, Opcode::I32X4Ne},
-#line 336 "src/lexer-keywords.txt"
+#line 337 "src/lexer-keywords.txt"
       {"i32x4.le_u", TokenType::Compare, Opcode::I32X4LeU},
-#line 103 "src/lexer-keywords.txt"
+#line 104 "src/lexer-keywords.txt"
       {"f32x4.gt", TokenType::Compare, Opcode::F32X4Gt},
-#line 331 "src/lexer-keywords.txt"
+#line 332 "src/lexer-keywords.txt"
       {"i32x4.ge_s", TokenType::Compare, Opcode::I32X4GeS},
-#line 105 "src/lexer-keywords.txt"
+#line 106 "src/lexer-keywords.txt"
       {"f32x4.lt", TokenType::Compare, Opcode::F32X4Lt},
-#line 335 "src/lexer-keywords.txt"
+#line 336 "src/lexer-keywords.txt"
       {"i32x4.le_s", TokenType::Compare, Opcode::I32X4LeS},
       {""},
-#line 334 "src/lexer-keywords.txt"
+#line 335 "src/lexer-keywords.txt"
       {"i32x4.gt_u", TokenType::Compare, Opcode::I32X4GtU},
-#line 591 "src/lexer-keywords.txt"
+#line 592 "src/lexer-keywords.txt"
       {"table", TokenType::Table},
-#line 344 "src/lexer-keywords.txt"
+#line 345 "src/lexer-keywords.txt"
       {"i32x4.lt_u", TokenType::Compare, Opcode::I32X4LtU},
       {""},
-#line 333 "src/lexer-keywords.txt"
+#line 334 "src/lexer-keywords.txt"
       {"i32x4.gt_s", TokenType::Compare, Opcode::I32X4GtS},
       {""},
-#line 343 "src/lexer-keywords.txt"
+#line 344 "src/lexer-keywords.txt"
       {"i32x4.lt_s", TokenType::Compare, Opcode::I32X4LtS},
       {""}, {""},
-#line 145 "src/lexer-keywords.txt"
+#line 146 "src/lexer-keywords.txt"
       {"f64.nearest", TokenType::Unary, Opcode::F64Nearest},
-#line 84 "src/lexer-keywords.txt"
+#line 85 "src/lexer-keywords.txt"
       {"f32.nearest", TokenType::Unary, Opcode::F32Nearest},
       {""}, {""}, {""}, {""}, {""},
 #line 30 "src/lexer-keywords.txt"
       {"before", TokenType::Before},
       {""}, {""}, {""}, {""},
-#line 109 "src/lexer-keywords.txt"
+#line 110 "src/lexer-keywords.txt"
       {"f32x4.nearest", TokenType::Unary, Opcode::F32X4Nearest},
       {""}, {""}, {""}, {""}, {""},
-#line 443 "src/lexer-keywords.txt"
+#line 444 "src/lexer-keywords.txt"
       {"i64.or", TokenType::Binary, Opcode::I64Or},
-#line 300 "src/lexer-keywords.txt"
+#line 301 "src/lexer-keywords.txt"
       {"i32.or", TokenType::Binary, Opcode::I32Or},
       {""},
 #line 48 "src/lexer-keywords.txt"
       {"declare", TokenType::Declare},
       {""}, {""}, {""}, {""}, {""}, {""}, {""},
-#line 586 "src/lexer-keywords.txt"
+#line 587 "src/lexer-keywords.txt"
       {"table.get", TokenType::TableGet, Opcode::TableGet},
-#line 583 "src/lexer-keywords.txt"
+#line 584 "src/lexer-keywords.txt"
       {"struct", Type::Struct, TokenType::Struct},
-#line 589 "src/lexer-keywords.txt"
+#line 590 "src/lexer-keywords.txt"
       {"table.set", TokenType::TableSet, Opcode::TableSet},
-#line 95 "src/lexer-keywords.txt"
+#line 96 "src/lexer-keywords.txt"
       {"f32x4.ceil", TokenType::Unary, Opcode::F32X4Ceil},
-#line 188 "src/lexer-keywords.txt"
+#line 189 "src/lexer-keywords.txt"
       {"func", Type::FuncRef, TokenType::Func},
-#line 153 "src/lexer-keywords.txt"
+#line 154 "src/lexer-keywords.txt"
       {"f64.trunc", TokenType::Unary, Opcode::F64Trunc},
-#line 91 "src/lexer-keywords.txt"
+#line 92 "src/lexer-keywords.txt"
       {"f32.trunc", TokenType::Unary, Opcode::F32Trunc},
       {""}, {""},
-#line 151 "src/lexer-keywords.txt"
+#line 152 "src/lexer-keywords.txt"
       {"f64.store", TokenType::Store, Opcode::F64Store},
-#line 89 "src/lexer-keywords.txt"
+#line 90 "src/lexer-keywords.txt"
       {"f32.store", TokenType::Store, Opcode::F32Store},
       {""}, {""}, {""},
-#line 448 "src/lexer-keywords.txt"
+#line 449 "src/lexer-keywords.txt"
       {"i64.rotl", TokenType::Binary, Opcode::I64Rotl},
-#line 305 "src/lexer-keywords.txt"
+#line 306 "src/lexer-keywords.txt"
       {"i32.rotl", TokenType::Binary, Opcode::I32Rotl},
       {""},
-#line 456 "src/lexer-keywords.txt"
+#line 457 "src/lexer-keywords.txt"
       {"i64.store", TokenType::Store, Opcode::I64Store},
-#line 312 "src/lexer-keywords.txt"
+#line 313 "src/lexer-keywords.txt"
       {"i32.store", TokenType::Store, Opcode::I32Store},
-#line 144 "src/lexer-keywords.txt"
+#line 145 "src/lexer-keywords.txt"
       {"f64.mul", TokenType::Binary, Opcode::F64Mul},
-#line 83 "src/lexer-keywords.txt"
+#line 84 "src/lexer-keywords.txt"
       {"f32.mul", TokenType::Binary, Opcode::F32Mul},
-#line 122 "src/lexer-keywords.txt"
+#line 123 "src/lexer-keywords.txt"
       {"f32x4.trunc", TokenType::Unary, Opcode::F32X4Trunc},
       {""}, {""},
-#line 449 "src/lexer-keywords.txt"
+#line 450 "src/lexer-keywords.txt"
       {"i64.rotr", TokenType::Binary, Opcode::I64Rotr},
-#line 306 "src/lexer-keywords.txt"
+#line 307 "src/lexer-keywords.txt"
       {"i32.rotr", TokenType::Binary, Opcode::I32Rotr},
       {""},
-#line 441 "src/lexer-keywords.txt"
+#line 442 "src/lexer-keywords.txt"
       {"i64.mul", TokenType::Binary, Opcode::I64Mul},
-#line 298 "src/lexer-keywords.txt"
+#line 299 "src/lexer-keywords.txt"
       {"i32.mul", TokenType::Binary, Opcode::I32Mul},
       {""}, {""}, {""}, {""},
-#line 108 "src/lexer-keywords.txt"
+#line 109 "src/lexer-keywords.txt"
       {"f32x4.mul", TokenType::Binary, Opcode::F32X4Mul},
       {""}, {""}, {""}, {""},
-#line 377 "src/lexer-keywords.txt"
+#line 378 "src/lexer-keywords.txt"
       {"i64.and", TokenType::Binary, Opcode::I64And},
-#line 248 "src/lexer-keywords.txt"
+#line 249 "src/lexer-keywords.txt"
       {"i32.and", TokenType::Binary, Opcode::I32And},
-#line 94 "src/lexer-keywords.txt"
+#line 95 "src/lexer-keywords.txt"
       {"f32x4.add", TokenType::Binary, Opcode::F32X4Add},
-#line 350 "src/lexer-keywords.txt"
+#line 351 "src/lexer-keywords.txt"
       {"i32x4.mul", TokenType::Binary, Opcode::I32X4Mul},
       {""}, {""},
 #line 40 "src/lexer-keywords.txt"
       {"call", TokenType::Call, Opcode::Call},
       {""}, {""}, {""},
-#line 325 "src/lexer-keywords.txt"
+#line 326 "src/lexer-keywords.txt"
       {"i32x4.add", TokenType::Binary, Opcode::I32X4Add},
       {""},
-#line 561 "src/lexer-keywords.txt"
+#line 562 "src/lexer-keywords.txt"
       {"null", TokenType::Null},
-#line 49 "src/lexer-keywords.txt"
+#line 50 "src/lexer-keywords.txt"
       {"delegate", TokenType::Delegate},
       {""}, {""},
-#line 545 "src/lexer-keywords.txt"
+#line 546 "src/lexer-keywords.txt"
       {"local", TokenType::Local},
       {""}, {""},
-#line 128 "src/lexer-keywords.txt"
+#line 129 "src/lexer-keywords.txt"
       {"f64.const", TokenType::Const, Opcode::F64Const},
-#line 66 "src/lexer-keywords.txt"
+#line 67 "src/lexer-keywords.txt"
       {"f32.const", TokenType::Const, Opcode::F32Const},
       {""},
-#line 118 "src/lexer-keywords.txt"
+#line 119 "src/lexer-keywords.txt"
       {"f32x4.replace_lane", TokenType::SimdLaneOp, Opcode::F32X4ReplaceLane},
       {""}, {""},
-#line 414 "src/lexer-keywords.txt"
+#line 415 "src/lexer-keywords.txt"
       {"i64.clz", TokenType::Unary, Opcode::I64Clz},
-#line 276 "src/lexer-keywords.txt"
+#line 277 "src/lexer-keywords.txt"
       {"i32.clz", TokenType::Unary, Opcode::I32Clz},
-#line 415 "src/lexer-keywords.txt"
+#line 416 "src/lexer-keywords.txt"
       {"i64.const", TokenType::Const, Opcode::I64Const},
-#line 277 "src/lexer-keywords.txt"
+#line 278 "src/lexer-keywords.txt"
       {"i32.const", TokenType::Const, Opcode::I32Const},
       {""},
-#line 354 "src/lexer-keywords.txt"
+#line 355 "src/lexer-keywords.txt"
       {"i32x4.replace_lane", TokenType::SimdLaneOp, Opcode::I32X4ReplaceLane},
       {""}, {""}, {""}, {""},
-#line 416 "src/lexer-keywords.txt"
+#line 417 "src/lexer-keywords.txt"
       {"i64.ctz", TokenType::Unary, Opcode::I64Ctz},
-#line 278 "src/lexer-keywords.txt"
+#line 279 "src/lexer-keywords.txt"
       {"i32.ctz", TokenType::Unary, Opcode::I32Ctz},
-#line 126 "src/lexer-keywords.txt"
+#line 127 "src/lexer-keywords.txt"
       {"f64.add", TokenType::Binary, Opcode::F64Add},
-#line 64 "src/lexer-keywords.txt"
+#line 65 "src/lexer-keywords.txt"
       {"f32.add", TokenType::Binary, Opcode::F32Add},
       {""}, {""}, {""}, {""}, {""}, {""},
-#line 376 "src/lexer-keywords.txt"
+#line 377 "src/lexer-keywords.txt"
       {"i64.add", TokenType::Binary, Opcode::I64Add},
-#line 247 "src/lexer-keywords.txt"
+#line 248 "src/lexer-keywords.txt"
       {"i32.add", TokenType::Binary, Opcode::I32Add},
       {""}, {""}, {""}, {""}, {""}, {""},
-#line 140 "src/lexer-keywords.txt"
+#line 141 "src/lexer-keywords.txt"
       {"f64.load", TokenType::Load, Opcode::F64Load},
-#line 79 "src/lexer-keywords.txt"
+#line 80 "src/lexer-keywords.txt"
       {"f32.load", TokenType::Load, Opcode::F32Load},
-#line 542 "src/lexer-keywords.txt"
+#line 543 "src/lexer-keywords.txt"
       {"local.get", TokenType::LocalGet, Opcode::LocalGet},
       {""},
-#line 543 "src/lexer-keywords.txt"
+#line 544 "src/lexer-keywords.txt"
       {"local.set", TokenType::LocalSet, Opcode::LocalSet},
-#line 580 "src/lexer-keywords.txt"
+#line 581 "src/lexer-keywords.txt"
       {"select", TokenType::Select, Opcode::Select},
-#line 544 "src/lexer-keywords.txt"
+#line 545 "src/lexer-keywords.txt"
       {"local.tee", TokenType::LocalTee, Opcode::LocalTee},
-#line 116 "src/lexer-keywords.txt"
+#line 117 "src/lexer-keywords.txt"
       {"f32x4.relaxed_min", TokenType::Binary, Opcode::F32X4RelaxedMin},
-#line 438 "src/lexer-keywords.txt"
+#line 439 "src/lexer-keywords.txt"
       {"i64.load", TokenType::Load, Opcode::I64Load},
-#line 295 "src/lexer-keywords.txt"
+#line 296 "src/lexer-keywords.txt"
       {"i32.load", TokenType::Load, Opcode::I32Load},
       {""}, {""}, {""},
-#line 353 "src/lexer-keywords.txt"
+#line 354 "src/lexer-keywords.txt"
       {"i32x4.relaxed_laneselect", TokenType::Ternary, Opcode::I32X4RelaxedLaneSelect},
-#line 427 "src/lexer-keywords.txt"
+#line 428 "src/lexer-keywords.txt"
       {"i64.ge_u", TokenType::Compare, Opcode::I64GeU},
-#line 286 "src/lexer-keywords.txt"
+#line 287 "src/lexer-keywords.txt"
       {"i32.ge_u", TokenType::Compare, Opcode::I32GeU},
-#line 431 "src/lexer-keywords.txt"
+#line 432 "src/lexer-keywords.txt"
       {"i64.le_u", TokenType::Compare, Opcode::I64LeU},
-#line 290 "src/lexer-keywords.txt"
+#line 291 "src/lexer-keywords.txt"
       {"i32.le_u", TokenType::Compare, Opcode::I32LeU},
-#line 426 "src/lexer-keywords.txt"
+#line 427 "src/lexer-keywords.txt"
       {"i64.ge_s", TokenType::Compare, Opcode::I64GeS},
-#line 285 "src/lexer-keywords.txt"
+#line 286 "src/lexer-keywords.txt"
       {"i32.ge_s", TokenType::Compare, Opcode::I32GeS},
-#line 430 "src/lexer-keywords.txt"
+#line 431 "src/lexer-keywords.txt"
       {"i64.le_s", TokenType::Compare, Opcode::I64LeS},
-#line 289 "src/lexer-keywords.txt"
+#line 290 "src/lexer-keywords.txt"
       {"i32.le_s", TokenType::Compare, Opcode::I32LeS},
-#line 429 "src/lexer-keywords.txt"
+#line 430 "src/lexer-keywords.txt"
       {"i64.gt_u", TokenType::Compare, Opcode::I64GtU},
-#line 288 "src/lexer-keywords.txt"
+#line 289 "src/lexer-keywords.txt"
       {"i32.gt_u", TokenType::Compare, Opcode::I32GtU},
-#line 440 "src/lexer-keywords.txt"
+#line 441 "src/lexer-keywords.txt"
       {"i64.lt_u", TokenType::Compare, Opcode::I64LtU},
-#line 297 "src/lexer-keywords.txt"
+#line 298 "src/lexer-keywords.txt"
       {"i32.lt_u", TokenType::Compare, Opcode::I32LtU},
-#line 428 "src/lexer-keywords.txt"
+#line 429 "src/lexer-keywords.txt"
       {"i64.gt_s", TokenType::Compare, Opcode::I64GtS},
-#line 287 "src/lexer-keywords.txt"
+#line 288 "src/lexer-keywords.txt"
       {"i32.gt_s", TokenType::Compare, Opcode::I32GtS},
-#line 439 "src/lexer-keywords.txt"
+#line 440 "src/lexer-keywords.txt"
       {"i64.lt_s", TokenType::Compare, Opcode::I64LtS},
-#line 296 "src/lexer-keywords.txt"
+#line 297 "src/lexer-keywords.txt"
       {"i32.lt_s", TokenType::Compare, Opcode::I32LtS},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
-#line 92 "src/lexer-keywords.txt"
+#line 93 "src/lexer-keywords.txt"
       {"f32", Type::F32},
       {""}, {""}, {""}, {""}, {""}, {""},
-#line 326 "src/lexer-keywords.txt"
+#line 327 "src/lexer-keywords.txt"
       {"i32x4.all_true", TokenType::Unary, Opcode::I32X4AllTrue},
-#line 322 "src/lexer-keywords.txt"
+#line 323 "src/lexer-keywords.txt"
       {"i32", Type::I32},
       {""}, {""}, {""}, {""},
-#line 568 "src/lexer-keywords.txt"
+#line 569 "src/lexer-keywords.txt"
       {"ref.as_non_null", TokenType::RefAsNonNull, Opcode::RefAsNonNull},
       {""}, {""}, {""},
-#line 459 "src/lexer-keywords.txt"
+#line 460 "src/lexer-keywords.txt"
       {"i64.trunc_f32_u", TokenType::Convert, Opcode::I64TruncF32U},
-#line 315 "src/lexer-keywords.txt"
+#line 316 "src/lexer-keywords.txt"
       {"i32.trunc_f32_u", TokenType::Convert, Opcode::I32TruncF32U},
-#line 455 "src/lexer-keywords.txt"
+#line 456 "src/lexer-keywords.txt"
       {"i64.store8", TokenType::Store, Opcode::I64Store8},
-#line 311 "src/lexer-keywords.txt"
+#line 312 "src/lexer-keywords.txt"
       {"i32.store8", TokenType::Store, Opcode::I32Store8},
-#line 458 "src/lexer-keywords.txt"
+#line 459 "src/lexer-keywords.txt"
       {"i64.trunc_f32_s", TokenType::Convert, Opcode::I64TruncF32S},
-#line 314 "src/lexer-keywords.txt"
+#line 315 "src/lexer-keywords.txt"
       {"i32.trunc_f32_s", TokenType::Convert, Opcode::I32TruncF32S},
       {""}, {""}, {""}, {""}, {""}, {""}, {""},
-#line 117 "src/lexer-keywords.txt"
+#line 118 "src/lexer-keywords.txt"
       {"f32x4.relaxed_nmadd", TokenType::Ternary, Opcode::F32X4RelaxedNmadd},
       {""}, {""}, {""}, {""}, {""},
-#line 340 "src/lexer-keywords.txt"
+#line 341 "src/lexer-keywords.txt"
       {"i32x4.relaxed_trunc_f64x2_u_zero", TokenType::Unary, Opcode::I32X4RelaxedTruncF64X2UZero},
-#line 578 "src/lexer-keywords.txt"
+#line 579 "src/lexer-keywords.txt"
       {"return_call", TokenType::ReturnCall, Opcode::ReturnCall},
-#line 339 "src/lexer-keywords.txt"
+#line 340 "src/lexer-keywords.txt"
       {"i32x4.relaxed_trunc_f64x2_s_zero", TokenType::Unary, Opcode::I32X4RelaxedTruncF64X2SZero},
 #line 35 "src/lexer-keywords.txt"
       {"br_on_null", TokenType::BrOnNull, Opcode::BrOnNull},
-#line 162 "src/lexer-keywords.txt"
+#line 163 "src/lexer-keywords.txt"
       {"f64x2.ge", TokenType::Compare, Opcode::F64X2Ge},
       {""},
-#line 164 "src/lexer-keywords.txt"
+#line 165 "src/lexer-keywords.txt"
       {"f64x2.le", TokenType::Compare, Opcode::F64X2Le},
-#line 170 "src/lexer-keywords.txt"
+#line 171 "src/lexer-keywords.txt"
       {"f64x2.neg", TokenType::Unary, Opcode::F64X2Neg},
       {""}, {""},
-#line 171 "src/lexer-keywords.txt"
+#line 172 "src/lexer-keywords.txt"
       {"f64x2.ne", TokenType::Compare, Opcode::F64X2Ne},
       {""}, {""}, {""}, {""},
-#line 479 "src/lexer-keywords.txt"
+#line 480 "src/lexer-keywords.txt"
       {"i64x2.neg", TokenType::Unary, Opcode::I64X2Neg},
       {""}, {""},
-#line 473 "src/lexer-keywords.txt"
+#line 474 "src/lexer-keywords.txt"
       {"i64x2.ne", TokenType::Binary, Opcode::I64X2Ne},
       {""},
-#line 163 "src/lexer-keywords.txt"
+#line 164 "src/lexer-keywords.txt"
       {"f64x2.gt", TokenType::Compare, Opcode::F64X2Gt},
-#line 477 "src/lexer-keywords.txt"
+#line 478 "src/lexer-keywords.txt"
       {"i64x2.ge_s", TokenType::Binary, Opcode::I64X2GeS},
-#line 165 "src/lexer-keywords.txt"
+#line 166 "src/lexer-keywords.txt"
       {"f64x2.lt", TokenType::Compare, Opcode::F64X2Lt},
-#line 476 "src/lexer-keywords.txt"
+#line 477 "src/lexer-keywords.txt"
       {"i64x2.le_s", TokenType::Binary, Opcode::I64X2LeS},
       {""},
-#line 413 "src/lexer-keywords.txt"
+#line 414 "src/lexer-keywords.txt"
       {"i64.atomic.store", TokenType::AtomicStore, Opcode::I64AtomicStore},
-#line 275 "src/lexer-keywords.txt"
+#line 276 "src/lexer-keywords.txt"
       {"i32.atomic.store", TokenType::AtomicStore, Opcode::I32AtomicStore},
       {""}, {""},
-#line 475 "src/lexer-keywords.txt"
+#line 476 "src/lexer-keywords.txt"
       {"i64x2.gt_s", TokenType::Binary, Opcode::I64X2GtS},
       {""},
-#line 474 "src/lexer-keywords.txt"
+#line 475 "src/lexer-keywords.txt"
       {"i64x2.lt_s", TokenType::Binary, Opcode::I64X2LtS},
-#line 57 "src/lexer-keywords.txt"
+#line 58 "src/lexer-keywords.txt"
       {"tag", TokenType::Tag},
       {""}, {""}, {""},
-#line 447 "src/lexer-keywords.txt"
+#line 448 "src/lexer-keywords.txt"
       {"i64.rem_u", TokenType::Binary, Opcode::I64RemU},
-#line 304 "src/lexer-keywords.txt"
+#line 305 "src/lexer-keywords.txt"
       {"i32.rem_u", TokenType::Binary, Opcode::I32RemU},
-#line 446 "src/lexer-keywords.txt"
+#line 447 "src/lexer-keywords.txt"
       {"i64.rem_s", TokenType::Binary, Opcode::I64RemS},
-#line 303 "src/lexer-keywords.txt"
+#line 304 "src/lexer-keywords.txt"
       {"i32.rem_s", TokenType::Binary, Opcode::I32RemS},
       {""},
-#line 406 "src/lexer-keywords.txt"
+#line 407 "src/lexer-keywords.txt"
       {"i64.atomic.rmw.or", TokenType::AtomicRmw, Opcode::I64AtomicRmwOr},
-#line 269 "src/lexer-keywords.txt"
+#line 270 "src/lexer-keywords.txt"
       {"i32.atomic.rmw.or", TokenType::AtomicRmw, Opcode::I32AtomicRmwOr},
       {""},
-#line 191 "src/lexer-keywords.txt"
+#line 192 "src/lexer-keywords.txt"
       {"get", TokenType::Get},
-#line 346 "src/lexer-keywords.txt"
+#line 347 "src/lexer-keywords.txt"
       {"i32x4.max_u", TokenType::Binary, Opcode::I32X4MaxU},
-#line 169 "src/lexer-keywords.txt"
+#line 170 "src/lexer-keywords.txt"
       {"f64x2.nearest", TokenType::Unary, Opcode::F64X2Nearest},
-#line 345 "src/lexer-keywords.txt"
+#line 346 "src/lexer-keywords.txt"
       {"i32x4.max_s", TokenType::Binary, Opcode::I32X4MaxS},
       {""},
-#line 393 "src/lexer-keywords.txt"
+#line 394 "src/lexer-keywords.txt"
       {"i64.atomic.rmw32.sub_u", TokenType::AtomicRmw, Opcode::I64AtomicRmw32SubU},
       {""},
-#line 437 "src/lexer-keywords.txt"
+#line 438 "src/lexer-keywords.txt"
       {"i64.load8_u", TokenType::Load, Opcode::I64Load8U},
-#line 294 "src/lexer-keywords.txt"
+#line 295 "src/lexer-keywords.txt"
       {"i32.load8_u", TokenType::Load, Opcode::I32Load8U},
-#line 436 "src/lexer-keywords.txt"
+#line 437 "src/lexer-keywords.txt"
       {"i64.load8_s", TokenType::Load, Opcode::I64Load8S},
-#line 293 "src/lexer-keywords.txt"
+#line 294 "src/lexer-keywords.txt"
       {"i32.load8_s", TokenType::Load, Opcode::I32Load8S},
       {""}, {""},
-#line 390 "src/lexer-keywords.txt"
+#line 391 "src/lexer-keywords.txt"
       {"i64.atomic.rmw32.and_u", TokenType::AtomicRmw, Opcode::I64AtomicRmw32AndU},
-#line 595 "src/lexer-keywords.txt"
+#line 596 "src/lexer-keywords.txt"
       {"try", TokenType::Try, Opcode::Try},
-#line 569 "src/lexer-keywords.txt"
+#line 570 "src/lexer-keywords.txt"
       {"ref.extern", TokenType::RefExtern},
       {""}, {""}, {""}, {""}, {""}, {""},
-#line 157 "src/lexer-keywords.txt"
+#line 158 "src/lexer-keywords.txt"
       {"f64x2.ceil", TokenType::Unary, Opcode::F64X2Ceil},
       {""}, {""}, {""}, {""},
-#line 450 "src/lexer-keywords.txt"
+#line 451 "src/lexer-keywords.txt"
       {"i64.shl", TokenType::Binary, Opcode::I64Shl},
-#line 307 "src/lexer-keywords.txt"
+#line 308 "src/lexer-keywords.txt"
       {"i32.shl", TokenType::Binary, Opcode::I32Shl},
-#line 114 "src/lexer-keywords.txt"
+#line 115 "src/lexer-keywords.txt"
       {"f32x4.relaxed_madd", TokenType::Ternary, Opcode::F32X4RelaxedMadd},
       {""}, {""}, {""},
-#line 127 "src/lexer-keywords.txt"
+#line 128 "src/lexer-keywords.txt"
       {"f64.ceil", TokenType::Unary, Opcode::F64Ceil},
-#line 65 "src/lexer-keywords.txt"
+#line 66 "src/lexer-keywords.txt"
       {"f32.ceil", TokenType::Unary, Opcode::F32Ceil},
       {""}, {""}, {""}, {""}, {""},
-#line 182 "src/lexer-keywords.txt"
+#line 183 "src/lexer-keywords.txt"
       {"f64x2.trunc", TokenType::Unary, Opcode::F64X2Trunc},
-#line 355 "src/lexer-keywords.txt"
+#line 356 "src/lexer-keywords.txt"
       {"i32x4.shl", TokenType::Binary, Opcode::I32X4Shl},
       {""},
-#line 498 "src/lexer-keywords.txt"
+#line 499 "src/lexer-keywords.txt"
       {"i64.xor", TokenType::Binary, Opcode::I64Xor},
-#line 375 "src/lexer-keywords.txt"
+#line 376 "src/lexer-keywords.txt"
       {"i32.xor", TokenType::Binary, Opcode::I32Xor},
       {""}, {""}, {""},
-#line 590 "src/lexer-keywords.txt"
+#line 591 "src/lexer-keywords.txt"
       {"table.size", TokenType::TableSize, Opcode::TableSize},
-#line 454 "src/lexer-keywords.txt"
+#line 455 "src/lexer-keywords.txt"
       {"i64.store32", TokenType::Store, Opcode::I64Store32},
       {""}, {""},
-#line 168 "src/lexer-keywords.txt"
+#line 169 "src/lexer-keywords.txt"
       {"f64x2.mul", TokenType::Binary, Opcode::F64X2Mul},
       {""}, {""},
-#line 573 "src/lexer-keywords.txt"
+#line 574 "src/lexer-keywords.txt"
       {"register", TokenType::Register},
       {""}, {""},
-#line 389 "src/lexer-keywords.txt"
+#line 390 "src/lexer-keywords.txt"
       {"i64.atomic.rmw32.add_u", TokenType::AtomicRmw, Opcode::I64AtomicRmw32AddU},
-#line 156 "src/lexer-keywords.txt"
+#line 157 "src/lexer-keywords.txt"
       {"f64x2.add", TokenType::Binary, Opcode::F64X2Add},
-#line 471 "src/lexer-keywords.txt"
+#line 472 "src/lexer-keywords.txt"
       {"i64x2.mul", TokenType::Binary, Opcode::I64X2Mul},
       {""},
-#line 409 "src/lexer-keywords.txt"
+#line 410 "src/lexer-keywords.txt"
       {"i64.atomic.rmw.xor", TokenType::AtomicRmw, Opcode::I64AtomicRmwXor},
-#line 272 "src/lexer-keywords.txt"
+#line 273 "src/lexer-keywords.txt"
       {"i32.atomic.rmw.xor", TokenType::AtomicRmw, Opcode::I32AtomicRmwXor},
       {""}, {""},
-#line 392 "src/lexer-keywords.txt"
+#line 393 "src/lexer-keywords.txt"
       {"i64.atomic.rmw32.or_u", TokenType::AtomicRmw, Opcode::I64AtomicRmw32OrU},
-#line 467 "src/lexer-keywords.txt"
+#line 468 "src/lexer-keywords.txt"
       {"i64x2.add", TokenType::Binary, Opcode::I64X2Add},
-#line 588 "src/lexer-keywords.txt"
+#line 589 "src/lexer-keywords.txt"
       {"table.init", TokenType::TableInit, Opcode::TableInit},
       {""}, {""},
-#line 381 "src/lexer-keywords.txt"
+#line 382 "src/lexer-keywords.txt"
       {"i64.atomic.load", TokenType::AtomicLoad, Opcode::I64AtomicLoad},
-#line 251 "src/lexer-keywords.txt"
+#line 252 "src/lexer-keywords.txt"
       {"i32.atomic.load", TokenType::AtomicLoad, Opcode::I32AtomicLoad},
-#line 143 "src/lexer-keywords.txt"
+#line 144 "src/lexer-keywords.txt"
       {"f64.min", TokenType::Binary, Opcode::F64Min},
-#line 82 "src/lexer-keywords.txt"
+#line 83 "src/lexer-keywords.txt"
       {"f32.min", TokenType::Binary, Opcode::F32Min},
       {""}, {""}, {""},
-#line 537 "src/lexer-keywords.txt"
+#line 538 "src/lexer-keywords.txt"
       {"if", TokenType::If, Opcode::If},
-#line 178 "src/lexer-keywords.txt"
+#line 179 "src/lexer-keywords.txt"
       {"f64x2.replace_lane", TokenType::SimdLaneOp, Opcode::F64X2ReplaceLane},
-#line 566 "src/lexer-keywords.txt"
+#line 567 "src/lexer-keywords.txt"
       {"ref", TokenType::Ref},
-#line 106 "src/lexer-keywords.txt"
+#line 107 "src/lexer-keywords.txt"
       {"f32x4.max", TokenType::Binary, Opcode::F32X4Max},
-#line 554 "src/lexer-keywords.txt"
+#line 555 "src/lexer-keywords.txt"
       {"memory.size", TokenType::MemorySize, Opcode::MemorySize},
-#line 107 "src/lexer-keywords.txt"
+#line 108 "src/lexer-keywords.txt"
       {"f32x4.min", TokenType::Binary, Opcode::F32X4Min},
       {""},
-#line 592 "src/lexer-keywords.txt"
+#line 593 "src/lexer-keywords.txt"
       {"then", TokenType::Then},
       {""},
-#line 487 "src/lexer-keywords.txt"
+#line 488 "src/lexer-keywords.txt"
       {"i64x2.replace_lane", TokenType::SimdLaneOp, Opcode::I64X2ReplaceLane},
       {""}, {""}, {""}, {""},
-#line 435 "src/lexer-keywords.txt"
+#line 436 "src/lexer-keywords.txt"
       {"i64.load32_u", TokenType::Load, Opcode::I64Load32U},
       {""}, {""},
-#line 55 "src/lexer-keywords.txt"
+#line 56 "src/lexer-keywords.txt"
       {"else", TokenType::Else, Opcode::Else},
-#line 434 "src/lexer-keywords.txt"
+#line 435 "src/lexer-keywords.txt"
       {"i64.load32_s", TokenType::Load, Opcode::I64Load32S},
       {""}, {""},
-#line 404 "src/lexer-keywords.txt"
+#line 405 "src/lexer-keywords.txt"
       {"i64.atomic.rmw.and", TokenType::AtomicRmw, Opcode::I64AtomicRmwAnd},
-#line 267 "src/lexer-keywords.txt"
+#line 268 "src/lexer-keywords.txt"
       {"i32.atomic.rmw.and", TokenType::AtomicRmw, Opcode::I32AtomicRmwAnd},
       {""}, {""}, {""},
-#line 100 "src/lexer-keywords.txt"
+#line 101 "src/lexer-keywords.txt"
       {"f32x4.extract_lane", TokenType::SimdLaneOp, Opcode::F32X4ExtractLane},
       {""}, {""}, {""}, {""}, {""},
-#line 190 "src/lexer-keywords.txt"
+#line 191 "src/lexer-keywords.txt"
       {"function", TokenType::Function},
       {""},
-#line 330 "src/lexer-keywords.txt"
+#line 331 "src/lexer-keywords.txt"
       {"i32x4.extract_lane", TokenType::SimdLaneOp, Opcode::I32X4ExtractLane},
-#line 52 "src/lexer-keywords.txt"
+#line 53 "src/lexer-keywords.txt"
       {"either", TokenType::Either},
-#line 58 "src/lexer-keywords.txt"
+#line 59 "src/lexer-keywords.txt"
       {"extern", Type::ExternRef, TokenType::Extern},
       {""}, {""},
-#line 176 "src/lexer-keywords.txt"
+#line 177 "src/lexer-keywords.txt"
       {"f64x2.relaxed_min", TokenType::Binary, Opcode::F64X2RelaxedMin},
       {""}, {""}, {""},
-#line 412 "src/lexer-keywords.txt"
+#line 413 "src/lexer-keywords.txt"
       {"i64.atomic.store8", TokenType::AtomicStore, Opcode::I64AtomicStore8},
-#line 274 "src/lexer-keywords.txt"
+#line 275 "src/lexer-keywords.txt"
       {"i32.atomic.store8", TokenType::AtomicStore, Opcode::I32AtomicStore8},
-#line 486 "src/lexer-keywords.txt"
+#line 487 "src/lexer-keywords.txt"
       {"i64x2.relaxed_laneselect", TokenType::Ternary, Opcode::I64X2RelaxedLaneSelect},
       {""}, {""}, {""}, {""}, {""}, {""},
-#line 397 "src/lexer-keywords.txt"
+#line 398 "src/lexer-keywords.txt"
       {"i64.atomic.rmw8.and_u", TokenType::AtomicRmw, Opcode::I64AtomicRmw8AndU},
-#line 260 "src/lexer-keywords.txt"
+#line 261 "src/lexer-keywords.txt"
       {"i32.atomic.rmw8.and_u", TokenType::AtomicRmw, Opcode::I32AtomicRmw8AndU},
-#line 338 "src/lexer-keywords.txt"
+#line 339 "src/lexer-keywords.txt"
       {"i32x4.relaxed_trunc_f32x4_u", TokenType::Unary, Opcode::I32X4RelaxedTruncF32X4U},
-#line 56 "src/lexer-keywords.txt"
+#line 57 "src/lexer-keywords.txt"
       {"end", TokenType::End, Opcode::End},
       {""}, {""},
-#line 337 "src/lexer-keywords.txt"
+#line 338 "src/lexer-keywords.txt"
       {"i32x4.relaxed_trunc_f32x4_s", TokenType::Unary, Opcode::I32X4RelaxedTruncF32X4S},
       {""}, {""}, {""}, {""},
-#line 60 "src/lexer-keywords.txt"
+#line 61 "src/lexer-keywords.txt"
       {"exn", Type::ExnRef, TokenType::Exn},
       {""}, {""},
-#line 403 "src/lexer-keywords.txt"
+#line 404 "src/lexer-keywords.txt"
       {"i64.atomic.rmw.add", TokenType::AtomicRmw, Opcode::I64AtomicRmwAdd},
-#line 266 "src/lexer-keywords.txt"
+#line 267 "src/lexer-keywords.txt"
       {"i32.atomic.rmw.add", TokenType::AtomicRmw, Opcode::I32AtomicRmwAdd},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
-#line 571 "src/lexer-keywords.txt"
+#line 572 "src/lexer-keywords.txt"
       {"ref.is_null", TokenType::RefIsNull, Opcode::RefIsNull},
-#line 480 "src/lexer-keywords.txt"
+#line 481 "src/lexer-keywords.txt"
       {"i64x2.all_true", TokenType::Unary, Opcode::I64X2AllTrue},
-#line 433 "src/lexer-keywords.txt"
+#line 434 "src/lexer-keywords.txt"
       {"i64.load16_u", TokenType::Load, Opcode::I64Load16U},
-#line 292 "src/lexer-keywords.txt"
+#line 293 "src/lexer-keywords.txt"
       {"i32.load16_u", TokenType::Load, Opcode::I32Load16U},
       {""}, {""},
-#line 432 "src/lexer-keywords.txt"
+#line 433 "src/lexer-keywords.txt"
       {"i64.load16_s", TokenType::Load, Opcode::I64Load16S},
-#line 291 "src/lexer-keywords.txt"
+#line 292 "src/lexer-keywords.txt"
       {"i32.load16_s", TokenType::Load, Opcode::I32Load16S},
       {""},
-#line 186 "src/lexer-keywords.txt"
+#line 187 "src/lexer-keywords.txt"
       {"f64x2", TokenType::F64X2},
       {""}, {""},
-#line 396 "src/lexer-keywords.txt"
+#line 397 "src/lexer-keywords.txt"
       {"i64.atomic.rmw8.add_u", TokenType::AtomicRmw, Opcode::I64AtomicRmw8AddU},
-#line 259 "src/lexer-keywords.txt"
+#line 260 "src/lexer-keywords.txt"
       {"i32.atomic.rmw8.add_u", TokenType::AtomicRmw, Opcode::I32AtomicRmw8AddU},
       {""}, {""}, {""},
-#line 497 "src/lexer-keywords.txt"
+#line 498 "src/lexer-keywords.txt"
       {"i64x2", TokenType::I64X2},
       {""}, {""}, {""},
-#line 541 "src/lexer-keywords.txt"
+#line 542 "src/lexer-keywords.txt"
       {"item", TokenType::Item},
       {""}, {""},
-#line 177 "src/lexer-keywords.txt"
+#line 178 "src/lexer-keywords.txt"
       {"f64x2.relaxed_nmadd", TokenType::Ternary, Opcode::F64X2RelaxedNmadd},
       {""},
-#line 187 "src/lexer-keywords.txt"
+#line 188 "src/lexer-keywords.txt"
       {"field", TokenType::Field},
       {""}, {""},
 #line 34 "src/lexer-keywords.txt"
       {"br_on_non_null", TokenType::BrOnNonNull, Opcode::BrOnNonNull},
       {""},
-#line 101 "src/lexer-keywords.txt"
+#line 102 "src/lexer-keywords.txt"
       {"f32x4.floor", TokenType::Unary, Opcode::F32X4Floor},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
-#line 380 "src/lexer-keywords.txt"
+#line 381 "src/lexer-keywords.txt"
       {"i64.atomic.load8_u", TokenType::AtomicLoad, Opcode::I64AtomicLoad8U},
-#line 250 "src/lexer-keywords.txt"
+#line 251 "src/lexer-keywords.txt"
       {"i32.atomic.load8_u", TokenType::AtomicLoad, Opcode::I32AtomicLoad8U},
-#line 452 "src/lexer-keywords.txt"
+#line 453 "src/lexer-keywords.txt"
       {"i64.shr_u", TokenType::Binary, Opcode::I64ShrU},
-#line 309 "src/lexer-keywords.txt"
+#line 310 "src/lexer-keywords.txt"
       {"i32.shr_u", TokenType::Binary, Opcode::I32ShrU},
-#line 451 "src/lexer-keywords.txt"
+#line 452 "src/lexer-keywords.txt"
       {"i64.shr_s", TokenType::Binary, Opcode::I64ShrS},
-#line 308 "src/lexer-keywords.txt"
+#line 309 "src/lexer-keywords.txt"
       {"i32.shr_s", TokenType::Binary, Opcode::I32ShrS},
       {""}, {""}, {""}, {""}, {""},
-#line 357 "src/lexer-keywords.txt"
+#line 358 "src/lexer-keywords.txt"
       {"i32x4.shr_u", TokenType::Binary, Opcode::I32X4ShrU},
-#line 223 "src/lexer-keywords.txt"
+#line 224 "src/lexer-keywords.txt"
       {"i16x8.neg", TokenType::Unary, Opcode::I16X8Neg},
-#line 356 "src/lexer-keywords.txt"
+#line 357 "src/lexer-keywords.txt"
       {"i32x4.shr_s", TokenType::Binary, Opcode::I32X4ShrS},
-#line 207 "src/lexer-keywords.txt"
+#line 208 "src/lexer-keywords.txt"
       {"i16x8.ge_u", TokenType::Compare, Opcode::I16X8GeU},
-#line 225 "src/lexer-keywords.txt"
+#line 226 "src/lexer-keywords.txt"
       {"i16x8.ne", TokenType::Compare, Opcode::I16X8Ne},
-#line 211 "src/lexer-keywords.txt"
+#line 212 "src/lexer-keywords.txt"
       {"i16x8.le_u", TokenType::Compare, Opcode::I16X8LeU},
       {""},
-#line 206 "src/lexer-keywords.txt"
+#line 207 "src/lexer-keywords.txt"
       {"i16x8.ge_s", TokenType::Compare, Opcode::I16X8GeS},
       {""},
-#line 210 "src/lexer-keywords.txt"
+#line 211 "src/lexer-keywords.txt"
       {"i16x8.le_s", TokenType::Compare, Opcode::I16X8LeS},
-#line 570 "src/lexer-keywords.txt"
+#line 571 "src/lexer-keywords.txt"
       {"ref.func", TokenType::RefFunc, Opcode::RefFunc},
-#line 209 "src/lexer-keywords.txt"
+#line 210 "src/lexer-keywords.txt"
       {"i16x8.gt_u", TokenType::Compare, Opcode::I16X8GtU},
       {""},
-#line 215 "src/lexer-keywords.txt"
+#line 216 "src/lexer-keywords.txt"
       {"i16x8.lt_u", TokenType::Compare, Opcode::I16X8LtU},
       {""},
-#line 208 "src/lexer-keywords.txt"
+#line 209 "src/lexer-keywords.txt"
       {"i16x8.gt_s", TokenType::Compare, Opcode::I16X8GtS},
-#line 559 "src/lexer-keywords.txt"
+#line 560 "src/lexer-keywords.txt"
       {"nan:canonical", TokenType::NanCanonical},
-#line 214 "src/lexer-keywords.txt"
+#line 215 "src/lexer-keywords.txt"
       {"i16x8.lt_s", TokenType::Compare, Opcode::I16X8LtS},
       {""}, {""},
-#line 136 "src/lexer-keywords.txt"
+#line 137 "src/lexer-keywords.txt"
       {"f64.floor", TokenType::Unary, Opcode::F64Floor},
-#line 75 "src/lexer-keywords.txt"
+#line 76 "src/lexer-keywords.txt"
       {"f32.floor", TokenType::Unary, Opcode::F32Floor},
       {""}, {""},
-#line 423 "src/lexer-keywords.txt"
+#line 424 "src/lexer-keywords.txt"
       {"i64.extend8_s", TokenType::Unary, Opcode::I64Extend8S},
-#line 284 "src/lexer-keywords.txt"
+#line 285 "src/lexer-keywords.txt"
       {"i32.extend8_s", TokenType::Unary, Opcode::I32Extend8S},
       {""}, {""}, {""}, {""}, {""}, {""}, {""},
 #line 42 "src/lexer-keywords.txt"
       {"catch_all", TokenType::CatchAll, Opcode::CatchAll},
-#line 242 "src/lexer-keywords.txt"
+#line 243 "src/lexer-keywords.txt"
       {"i16x8", TokenType::I16X8},
       {""}, {""}, {""},
-#line 461 "src/lexer-keywords.txt"
+#line 462 "src/lexer-keywords.txt"
       {"i64.trunc_f64_u", TokenType::Convert, Opcode::I64TruncF64U},
-#line 317 "src/lexer-keywords.txt"
+#line 318 "src/lexer-keywords.txt"
       {"i32.trunc_f64_u", TokenType::Convert, Opcode::I32TruncF64U},
       {""}, {""},
-#line 460 "src/lexer-keywords.txt"
+#line 461 "src/lexer-keywords.txt"
       {"i64.trunc_f64_s", TokenType::Convert, Opcode::I64TruncF64S},
-#line 316 "src/lexer-keywords.txt"
+#line 317 "src/lexer-keywords.txt"
       {"i32.trunc_f64_s", TokenType::Convert, Opcode::I32TruncF64S},
       {""}, {""},
-#line 348 "src/lexer-keywords.txt"
+#line 349 "src/lexer-keywords.txt"
       {"i32x4.min_u", TokenType::Binary, Opcode::I32X4MinU},
       {""},
-#line 347 "src/lexer-keywords.txt"
+#line 348 "src/lexer-keywords.txt"
       {"i32x4.min_s", TokenType::Binary, Opcode::I32X4MinS},
       {""}, {""},
-#line 174 "src/lexer-keywords.txt"
+#line 175 "src/lexer-keywords.txt"
       {"f64x2.relaxed_madd", TokenType::Ternary, Opcode::F64X2RelaxedMadd},
       {""}, {""}, {""},
-#line 629 "src/lexer-keywords.txt"
+#line 630 "src/lexer-keywords.txt"
       {"i64.mul_wide_u", TokenType::Binary, Opcode::I64MulWideU},
       {""},
-#line 628 "src/lexer-keywords.txt"
+#line 629 "src/lexer-keywords.txt"
       {"i64.mul_wide_s", TokenType::Binary, Opcode::I64MulWideS},
       {""}, {""}, {""}, {""}, {""},
-#line 488 "src/lexer-keywords.txt"
+#line 489 "src/lexer-keywords.txt"
       {"i64x2.shl", TokenType::Binary, Opcode::I64X2Shl},
+#line 49 "src/lexer-keywords.txt"
+      {"definition", TokenType::Definition},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
-      {""}, {""}, {""},
-#line 558 "src/lexer-keywords.txt"
+      {""}, {""},
+#line 559 "src/lexer-keywords.txt"
       {"nan:arithmetic", TokenType::NanArithmetic},
       {""},
-#line 576 "src/lexer-keywords.txt"
+#line 577 "src/lexer-keywords.txt"
       {"return_call_indirect", TokenType::ReturnCallIndirect, Opcode::ReturnCallIndirect},
       {""}, {""}, {""}, {""}, {""},
-#line 399 "src/lexer-keywords.txt"
+#line 400 "src/lexer-keywords.txt"
       {"i64.atomic.rmw8.or_u", TokenType::AtomicRmw, Opcode::I64AtomicRmw8OrU},
-#line 262 "src/lexer-keywords.txt"
+#line 263 "src/lexer-keywords.txt"
       {"i32.atomic.rmw8.or_u", TokenType::AtomicRmw, Opcode::I32AtomicRmw8OrU},
       {""}, {""}, {""}, {""},
-#line 220 "src/lexer-keywords.txt"
+#line 221 "src/lexer-keywords.txt"
       {"i16x8.mul", TokenType::Binary, Opcode::I16X8Mul},
       {""},
-#line 555 "src/lexer-keywords.txt"
+#line 556 "src/lexer-keywords.txt"
       {"memory", TokenType::Memory},
       {""}, {""}, {""}, {""},
-#line 198 "src/lexer-keywords.txt"
+#line 199 "src/lexer-keywords.txt"
       {"i16x8.add", TokenType::Binary, Opcode::I16X8Add},
       {""}, {""}, {""}, {""},
-#line 422 "src/lexer-keywords.txt"
+#line 423 "src/lexer-keywords.txt"
       {"i64.extend32_s", TokenType::Unary, Opcode::I64Extend32S},
-#line 166 "src/lexer-keywords.txt"
+#line 167 "src/lexer-keywords.txt"
       {"f64x2.max", TokenType::Binary, Opcode::F64X2Max},
       {""},
-#line 167 "src/lexer-keywords.txt"
+#line 168 "src/lexer-keywords.txt"
       {"f64x2.min", TokenType::Binary, Opcode::F64X2Min},
       {""}, {""}, {""},
-#line 395 "src/lexer-keywords.txt"
+#line 396 "src/lexer-keywords.txt"
       {"i64.atomic.rmw32.xor_u", TokenType::AtomicRmw, Opcode::I64AtomicRmw32XorU},
       {""}, {""}, {""},
-#line 394 "src/lexer-keywords.txt"
+#line 395 "src/lexer-keywords.txt"
       {"i64.atomic.rmw32.xchg_u", TokenType::AtomicRmw, Opcode::I64AtomicRmw32XchgU},
-#line 142 "src/lexer-keywords.txt"
+#line 143 "src/lexer-keywords.txt"
       {"f64.max", TokenType::Binary, Opcode::F64Max},
-#line 81 "src/lexer-keywords.txt"
+#line 82 "src/lexer-keywords.txt"
       {"f32.max", TokenType::Binary, Opcode::F32Max},
       {""},
-#line 228 "src/lexer-keywords.txt"
+#line 229 "src/lexer-keywords.txt"
       {"i16x8.replace_lane", TokenType::SimdLaneOp, Opcode::I16X8ReplaceLane},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
-#line 160 "src/lexer-keywords.txt"
+#line 161 "src/lexer-keywords.txt"
       {"f64x2.extract_lane", TokenType::SimdLaneOp, Opcode::F64X2ExtractLane},
-#line 523 "src/lexer-keywords.txt"
+#line 524 "src/lexer-keywords.txt"
       {"i8x16.neg", TokenType::Unary, Opcode::I8X16Neg},
       {""},
-#line 510 "src/lexer-keywords.txt"
+#line 511 "src/lexer-keywords.txt"
       {"i8x16.ge_u", TokenType::Compare, Opcode::I8X16GeU},
-#line 525 "src/lexer-keywords.txt"
+#line 526 "src/lexer-keywords.txt"
       {"i8x16.ne", TokenType::Compare, Opcode::I8X16Ne},
-#line 514 "src/lexer-keywords.txt"
+#line 515 "src/lexer-keywords.txt"
       {"i8x16.le_u", TokenType::Compare, Opcode::I8X16LeU},
       {""},
-#line 509 "src/lexer-keywords.txt"
+#line 510 "src/lexer-keywords.txt"
       {"i8x16.ge_s", TokenType::Compare, Opcode::I8X16GeS},
-#line 468 "src/lexer-keywords.txt"
+#line 469 "src/lexer-keywords.txt"
       {"i64x2.extract_lane", TokenType::SimdLaneOp, Opcode::I64X2ExtractLane},
-#line 513 "src/lexer-keywords.txt"
+#line 514 "src/lexer-keywords.txt"
       {"i8x16.le_s", TokenType::Compare, Opcode::I8X16LeS},
-#line 72 "src/lexer-keywords.txt"
+#line 73 "src/lexer-keywords.txt"
       {"f32.demote_f64", TokenType::Convert, Opcode::F32DemoteF64},
-#line 512 "src/lexer-keywords.txt"
+#line 513 "src/lexer-keywords.txt"
       {"i8x16.gt_u", TokenType::Compare, Opcode::I8X16GtU},
       {""},
-#line 516 "src/lexer-keywords.txt"
+#line 517 "src/lexer-keywords.txt"
       {"i8x16.lt_u", TokenType::Compare, Opcode::I8X16LtU},
-#line 567 "src/lexer-keywords.txt"
+#line 568 "src/lexer-keywords.txt"
       {"quote", TokenType::Quote},
-#line 511 "src/lexer-keywords.txt"
+#line 512 "src/lexer-keywords.txt"
       {"i8x16.gt_s", TokenType::Compare, Opcode::I8X16GtS},
       {""},
-#line 515 "src/lexer-keywords.txt"
+#line 516 "src/lexer-keywords.txt"
       {"i8x16.lt_s", TokenType::Compare, Opcode::I8X16LtS},
       {""}, {""},
 #line 41 "src/lexer-keywords.txt"
       {"catch", TokenType::Catch, Opcode::Catch},
       {""}, {""}, {""},
-#line 408 "src/lexer-keywords.txt"
+#line 409 "src/lexer-keywords.txt"
       {"i64.atomic.rmw.xchg", TokenType::AtomicRmw, Opcode::I64AtomicRmwXchg},
-#line 271 "src/lexer-keywords.txt"
+#line 272 "src/lexer-keywords.txt"
       {"i32.atomic.rmw.xchg", TokenType::AtomicRmw, Opcode::I32AtomicRmwXchg},
       {""},
-#line 226 "src/lexer-keywords.txt"
+#line 227 "src/lexer-keywords.txt"
       {"i16x8.relaxed_laneselect", TokenType::Ternary, Opcode::I16X8RelaxedLaneSelect},
       {""}, {""}, {""},
-#line 563 "src/lexer-keywords.txt"
+#line 564 "src/lexer-keywords.txt"
       {"output", TokenType::Output},
       {""}, {""}, {""},
-#line 562 "src/lexer-keywords.txt"
+#line 563 "src/lexer-keywords.txt"
       {"offset", TokenType::Offset},
       {""}, {""}, {""}, {""},
-#line 540 "src/lexer-keywords.txt"
+#line 541 "src/lexer-keywords.txt"
       {"invoke", TokenType::Invoke},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
-#line 421 "src/lexer-keywords.txt"
+#line 422 "src/lexer-keywords.txt"
       {"i64.extend16_s", TokenType::Unary, Opcode::I64Extend16S},
-#line 283 "src/lexer-keywords.txt"
+#line 284 "src/lexer-keywords.txt"
       {"i32.extend16_s", TokenType::Unary, Opcode::I32Extend16S},
       {""}, {""}, {""}, {""},
-#line 115 "src/lexer-keywords.txt"
+#line 116 "src/lexer-keywords.txt"
       {"f32x4.relaxed_max", TokenType::Binary, Opcode::F32X4RelaxedMax},
-#line 402 "src/lexer-keywords.txt"
+#line 403 "src/lexer-keywords.txt"
       {"i64.atomic.rmw8.xor_u", TokenType::AtomicRmw, Opcode::I64AtomicRmw8XorU},
-#line 265 "src/lexer-keywords.txt"
+#line 266 "src/lexer-keywords.txt"
       {"i32.atomic.rmw8.xor_u", TokenType::AtomicRmw, Opcode::I32AtomicRmw8XorU},
-#line 119 "src/lexer-keywords.txt"
+#line 120 "src/lexer-keywords.txt"
       {"f32x4.splat", TokenType::Unary, Opcode::F32X4Splat},
       {""},
 #line 32 "src/lexer-keywords.txt"
@@ -1023,701 +1025,701 @@ Perfect_Hash::InWordSet (const char *str, size_t len)
       {""}, {""}, {""},
 #line 31 "src/lexer-keywords.txt"
       {"binary", TokenType::Bin},
-#line 234 "src/lexer-keywords.txt"
+#line 235 "src/lexer-keywords.txt"
       {"i16x8.sub_sat_u", TokenType::Binary, Opcode::I16X8SubSatU},
-#line 358 "src/lexer-keywords.txt"
+#line 359 "src/lexer-keywords.txt"
       {"i32x4.splat", TokenType::Unary, Opcode::I32X4Splat},
       {""},
-#line 199 "src/lexer-keywords.txt"
+#line 200 "src/lexer-keywords.txt"
       {"i16x8.all_true", TokenType::Unary, Opcode::I16X8AllTrue},
-#line 233 "src/lexer-keywords.txt"
+#line 234 "src/lexer-keywords.txt"
       {"i16x8.sub_sat_s", TokenType::Binary, Opcode::I16X8SubSatS},
       {""}, {""}, {""},
-#line 610 "src/lexer-keywords.txt"
+#line 611 "src/lexer-keywords.txt"
       {"v128", Type::V128},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""}, {""},
-#line 161 "src/lexer-keywords.txt"
+#line 162 "src/lexer-keywords.txt"
       {"f64x2.floor", TokenType::Unary, Opcode::F64X2Floor},
       {""}, {""}, {""},
 #line 38 "src/lexer-keywords.txt"
       {"call_indirect", TokenType::CallIndirect, Opcode::CallIndirect},
       {""}, {""},
-#line 502 "src/lexer-keywords.txt"
+#line 503 "src/lexer-keywords.txt"
       {"i8x16.add", TokenType::Binary, Opcode::I8X16Add},
       {""}, {""},
-#line 605 "src/lexer-keywords.txt"
+#line 606 "src/lexer-keywords.txt"
       {"v128.or", TokenType::Binary, Opcode::V128Or},
-#line 551 "src/lexer-keywords.txt"
+#line 552 "src/lexer-keywords.txt"
       {"memory.fill", TokenType::MemoryFill, Opcode::MemoryFill},
       {""}, {""},
-#line 585 "src/lexer-keywords.txt"
+#line 586 "src/lexer-keywords.txt"
       {"table.fill", TokenType::TableFill, Opcode::TableFill},
       {""}, {""}, {""}, {""}, {""}, {""},
-#line 490 "src/lexer-keywords.txt"
+#line 491 "src/lexer-keywords.txt"
       {"i64x2.shr_u", TokenType::Binary, Opcode::I64X2ShrU},
       {""},
-#line 489 "src/lexer-keywords.txt"
+#line 490 "src/lexer-keywords.txt"
       {"i64x2.shr_s", TokenType::Binary, Opcode::I64X2ShrS},
       {""},
-#line 379 "src/lexer-keywords.txt"
+#line 380 "src/lexer-keywords.txt"
       {"i64.atomic.load32_u", TokenType::AtomicLoad, Opcode::I64AtomicLoad32U},
       {""},
-#line 528 "src/lexer-keywords.txt"
+#line 529 "src/lexer-keywords.txt"
       {"i8x16.replace_lane", TokenType::SimdLaneOp, Opcode::I8X16ReplaceLane},
-#line 197 "src/lexer-keywords.txt"
+#line 198 "src/lexer-keywords.txt"
       {"i16x8.add_sat_u", TokenType::Binary, Opcode::I16X8AddSatU},
       {""},
-#line 626 "src/lexer-keywords.txt"
+#line 627 "src/lexer-keywords.txt"
       {"i64.add128", TokenType::Quaternary, Opcode::I64Add128},
       {""},
-#line 196 "src/lexer-keywords.txt"
+#line 197 "src/lexer-keywords.txt"
       {"i16x8.add_sat_s", TokenType::Binary, Opcode::I16X8AddSatS},
       {""},
-#line 604 "src/lexer-keywords.txt"
+#line 605 "src/lexer-keywords.txt"
       {"v128.not", TokenType::Unary, Opcode::V128Not},
-#line 609 "src/lexer-keywords.txt"
+#line 610 "src/lexer-keywords.txt"
       {"v128.store", TokenType::Store, Opcode::V128Store},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""},
-#line 391 "src/lexer-keywords.txt"
+#line 392 "src/lexer-keywords.txt"
       {"i64.atomic.rmw32.cmpxchg_u", TokenType::AtomicRmwCmpxchg, Opcode::I64AtomicRmw32CmpxchgU},
       {""}, {""},
-#line 584 "src/lexer-keywords.txt"
+#line 585 "src/lexer-keywords.txt"
       {"table.copy", TokenType::TableCopy, Opcode::TableCopy},
       {""},
-#line 411 "src/lexer-keywords.txt"
+#line 412 "src/lexer-keywords.txt"
       {"i64.atomic.store32", TokenType::AtomicStore, Opcode::I64AtomicStore32},
-#line 217 "src/lexer-keywords.txt"
+#line 218 "src/lexer-keywords.txt"
       {"i16x8.max_u", TokenType::Binary, Opcode::I16X8MaxU},
 #line 46 "src/lexer-keywords.txt"
       {"data.drop", TokenType::DataDrop, Opcode::DataDrop},
-#line 216 "src/lexer-keywords.txt"
+#line 217 "src/lexer-keywords.txt"
       {"i16x8.max_s", TokenType::Binary, Opcode::I16X8MaxS},
       {""}, {""}, {""},
-#line 113 "src/lexer-keywords.txt"
+#line 114 "src/lexer-keywords.txt"
       {"f32x4.pmin", TokenType::Binary, Opcode::F32X4PMin},
-#line 600 "src/lexer-keywords.txt"
+#line 601 "src/lexer-keywords.txt"
       {"v128.and", TokenType::Binary, Opcode::V128And},
       {""}, {""},
-#line 603 "src/lexer-keywords.txt"
+#line 604 "src/lexer-keywords.txt"
       {"v128.load", TokenType::Load, Opcode::V128Load},
-#line 527 "src/lexer-keywords.txt"
+#line 528 "src/lexer-keywords.txt"
       {"i8x16.relaxed_laneselect", TokenType::Ternary, Opcode::I8X16RelaxedLaneSelect},
       {""}, {""}, {""},
-#line 386 "src/lexer-keywords.txt"
+#line 387 "src/lexer-keywords.txt"
       {"i64.atomic.rmw16.sub_u", TokenType::AtomicRmw, Opcode::I64AtomicRmw16SubU},
-#line 256 "src/lexer-keywords.txt"
+#line 257 "src/lexer-keywords.txt"
       {"i32.atomic.rmw16.sub_u", TokenType::AtomicRmw, Opcode::I32AtomicRmw16SubU},
       {""}, {""}, {""}, {""}, {""}, {""},
-#line 383 "src/lexer-keywords.txt"
+#line 384 "src/lexer-keywords.txt"
       {"i64.atomic.rmw16.and_u", TokenType::AtomicRmw, Opcode::I64AtomicRmw16AndU},
-#line 253 "src/lexer-keywords.txt"
+#line 254 "src/lexer-keywords.txt"
       {"i32.atomic.rmw16.and_u", TokenType::AtomicRmw, Opcode::I32AtomicRmw16AndU},
-#line 623 "src/lexer-keywords.txt"
+#line 624 "src/lexer-keywords.txt"
       {"v128.store64_lane", TokenType::SimdStoreLane, Opcode::V128Store64Lane},
       {""}, {""},
-#line 425 "src/lexer-keywords.txt"
+#line 426 "src/lexer-keywords.txt"
       {"i64.extend_i32_u", TokenType::Convert, Opcode::I64ExtendI32U},
       {""},
-#line 424 "src/lexer-keywords.txt"
+#line 425 "src/lexer-keywords.txt"
       {"i64.extend_i32_s", TokenType::Convert, Opcode::I64ExtendI32S},
       {""}, {""}, {""}, {""},
-#line 599 "src/lexer-keywords.txt"
+#line 600 "src/lexer-keywords.txt"
       {"v128.andnot", TokenType::Binary, Opcode::V128Andnot},
       {""}, {""}, {""}, {""},
-#line 229 "src/lexer-keywords.txt"
+#line 230 "src/lexer-keywords.txt"
       {"i16x8.shl", TokenType::Binary, Opcode::I16X8Shl},
       {""}, {""}, {""},
-#line 602 "src/lexer-keywords.txt"
+#line 603 "src/lexer-keywords.txt"
       {"v128.const", TokenType::Const, Opcode::V128Const},
       {""},
-#line 378 "src/lexer-keywords.txt"
+#line 379 "src/lexer-keywords.txt"
       {"i64.atomic.load16_u", TokenType::AtomicLoad, Opcode::I64AtomicLoad16U},
-#line 249 "src/lexer-keywords.txt"
+#line 250 "src/lexer-keywords.txt"
       {"i32.atomic.load16_u", TokenType::AtomicLoad, Opcode::I32AtomicLoad16U},
       {""},
-#line 534 "src/lexer-keywords.txt"
+#line 535 "src/lexer-keywords.txt"
       {"i8x16.sub_sat_u", TokenType::Binary, Opcode::I8X16SubSatU},
       {""}, {""},
-#line 503 "src/lexer-keywords.txt"
+#line 504 "src/lexer-keywords.txt"
       {"i8x16.all_true", TokenType::Unary, Opcode::I8X16AllTrue},
-#line 533 "src/lexer-keywords.txt"
+#line 534 "src/lexer-keywords.txt"
       {"i8x16.sub_sat_s", TokenType::Binary, Opcode::I8X16SubSatS},
       {""}, {""},
-#line 59 "src/lexer-keywords.txt"
+#line 60 "src/lexer-keywords.txt"
       {"externref", Type::ExternRef},
       {""},
-#line 465 "src/lexer-keywords.txt"
+#line 466 "src/lexer-keywords.txt"
       {"i64.trunc_sat_f64_u", TokenType::Convert, Opcode::I64TruncSatF64U},
-#line 321 "src/lexer-keywords.txt"
+#line 322 "src/lexer-keywords.txt"
       {"i32.trunc_sat_f64_u", TokenType::Convert, Opcode::I32TruncSatF64U},
       {""}, {""},
-#line 464 "src/lexer-keywords.txt"
+#line 465 "src/lexer-keywords.txt"
       {"i64.trunc_sat_f64_s", TokenType::Convert, Opcode::I64TruncSatF64S},
-#line 320 "src/lexer-keywords.txt"
+#line 321 "src/lexer-keywords.txt"
       {"i32.trunc_sat_f64_s", TokenType::Convert, Opcode::I32TruncSatF64S},
-#line 616 "src/lexer-keywords.txt"
+#line 617 "src/lexer-keywords.txt"
       {"v128.load8_lane", TokenType::SimdLoadLane, Opcode::V128Load8Lane},
       {""},
 #line 33 "src/lexer-keywords.txt"
       {"br_if", TokenType::BrIf, Opcode::BrIf},
       {""},
-#line 382 "src/lexer-keywords.txt"
+#line 383 "src/lexer-keywords.txt"
       {"i64.atomic.rmw16.add_u", TokenType::AtomicRmw, Opcode::I64AtomicRmw16AddU},
-#line 252 "src/lexer-keywords.txt"
+#line 253 "src/lexer-keywords.txt"
       {"i32.atomic.rmw16.add_u", TokenType::AtomicRmw, Opcode::I32AtomicRmw16AddU},
       {""}, {""}, {""},
-#line 615 "src/lexer-keywords.txt"
+#line 616 "src/lexer-keywords.txt"
       {"v128.load8_splat", TokenType::Load, Opcode::V128Load8Splat},
       {""}, {""},
-#line 385 "src/lexer-keywords.txt"
+#line 386 "src/lexer-keywords.txt"
       {"i64.atomic.rmw16.or_u", TokenType::AtomicRmw, Opcode::I64AtomicRmw16OrU},
-#line 255 "src/lexer-keywords.txt"
+#line 256 "src/lexer-keywords.txt"
       {"i32.atomic.rmw16.or_u", TokenType::AtomicRmw, Opcode::I32AtomicRmw16OrU},
       {""},
-#line 98 "src/lexer-keywords.txt"
+#line 99 "src/lexer-keywords.txt"
       {"f32x4.div", TokenType::Binary, Opcode::F32X4Div},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
-#line 132 "src/lexer-keywords.txt"
+#line 133 "src/lexer-keywords.txt"
       {"f64.convert_i64_u", TokenType::Convert, Opcode::F64ConvertI64U},
-#line 70 "src/lexer-keywords.txt"
+#line 71 "src/lexer-keywords.txt"
       {"f32.convert_i64_u", TokenType::Convert, Opcode::F32ConvertI64U},
-#line 189 "src/lexer-keywords.txt"
+#line 190 "src/lexer-keywords.txt"
       {"funcref", Type::FuncRef},
-#line 553 "src/lexer-keywords.txt"
+#line 554 "src/lexer-keywords.txt"
       {"memory.init", TokenType::MemoryInit, Opcode::MemoryInit},
-#line 131 "src/lexer-keywords.txt"
+#line 132 "src/lexer-keywords.txt"
       {"f64.convert_i64_s", TokenType::Convert, Opcode::F64ConvertI64S},
-#line 69 "src/lexer-keywords.txt"
+#line 70 "src/lexer-keywords.txt"
       {"f32.convert_i64_s", TokenType::Convert, Opcode::F32ConvertI64S},
       {""},
-#line 54 "src/lexer-keywords.txt"
+#line 55 "src/lexer-keywords.txt"
       {"elem", TokenType::Elem},
       {""}, {""},
 #line 21 "src/lexer-keywords.txt"
       {"after", TokenType::After},
       {""}, {""},
-#line 501 "src/lexer-keywords.txt"
+#line 502 "src/lexer-keywords.txt"
       {"i8x16.add_sat_u", TokenType::Binary, Opcode::I8X16AddSatU},
       {""}, {""}, {""},
-#line 500 "src/lexer-keywords.txt"
+#line 501 "src/lexer-keywords.txt"
       {"i8x16.add_sat_s", TokenType::Binary, Opcode::I8X16AddSatS},
       {""},
-#line 597 "src/lexer-keywords.txt"
+#line 598 "src/lexer-keywords.txt"
       {"type", TokenType::Type},
-#line 125 "src/lexer-keywords.txt"
+#line 126 "src/lexer-keywords.txt"
       {"f64.abs", TokenType::Unary, Opcode::F64Abs},
-#line 63 "src/lexer-keywords.txt"
+#line 64 "src/lexer-keywords.txt"
       {"f32.abs", TokenType::Unary, Opcode::F32Abs},
       {""}, {""}, {""},
-#line 213 "src/lexer-keywords.txt"
+#line 214 "src/lexer-keywords.txt"
       {"v128.load8x8_u", TokenType::Load, Opcode::V128Load8X8U},
       {""},
-#line 212 "src/lexer-keywords.txt"
+#line 213 "src/lexer-keywords.txt"
       {"v128.load8x8_s", TokenType::Load, Opcode::V128Load8X8S},
       {""},
-#line 349 "src/lexer-keywords.txt"
+#line 350 "src/lexer-keywords.txt"
       {"i32x4.dot_i16x8_s", TokenType::Binary, Opcode::I32X4DotI16X8S},
-#line 121 "src/lexer-keywords.txt"
+#line 122 "src/lexer-keywords.txt"
       {"f32x4.sub", TokenType::Binary, Opcode::F32X4Sub},
       {""},
-#line 582 "src/lexer-keywords.txt"
+#line 583 "src/lexer-keywords.txt"
       {"start", TokenType::Start},
       {""},
-#line 93 "src/lexer-keywords.txt"
+#line 94 "src/lexer-keywords.txt"
       {"f32x4.abs", TokenType::Unary, Opcode::F32X4Abs},
       {""}, {""},
-#line 518 "src/lexer-keywords.txt"
+#line 519 "src/lexer-keywords.txt"
       {"i8x16.max_u", TokenType::Binary, Opcode::I8X16MaxU},
-#line 359 "src/lexer-keywords.txt"
+#line 360 "src/lexer-keywords.txt"
       {"i32x4.sub", TokenType::Binary, Opcode::I32X4Sub},
-#line 517 "src/lexer-keywords.txt"
+#line 518 "src/lexer-keywords.txt"
       {"i8x16.max_s", TokenType::Binary, Opcode::I8X16MaxS},
       {""}, {""},
-#line 324 "src/lexer-keywords.txt"
+#line 325 "src/lexer-keywords.txt"
       {"i32x4.abs", TokenType::Unary, Opcode::I32X4Abs},
-#line 453 "src/lexer-keywords.txt"
+#line 454 "src/lexer-keywords.txt"
       {"i64.store16", TokenType::Store, Opcode::I64Store16},
-#line 310 "src/lexer-keywords.txt"
+#line 311 "src/lexer-keywords.txt"
       {"i32.store16", TokenType::Store, Opcode::I32Store16},
       {""}, {""}, {""}, {""}, {""}, {""}, {""},
-#line 536 "src/lexer-keywords.txt"
+#line 537 "src/lexer-keywords.txt"
       {"i8x16", TokenType::I8X16},
       {""}, {""},
-#line 539 "src/lexer-keywords.txt"
+#line 540 "src/lexer-keywords.txt"
       {"input", TokenType::Input},
       {""}, {""}, {""},
-#line 598 "src/lexer-keywords.txt"
+#line 599 "src/lexer-keywords.txt"
       {"unreachable", TokenType::Unreachable, Opcode::Unreachable},
       {""},
-#line 175 "src/lexer-keywords.txt"
+#line 176 "src/lexer-keywords.txt"
       {"f64x2.relaxed_max", TokenType::Binary, Opcode::F64X2RelaxedMax},
       {""}, {""},
-#line 179 "src/lexer-keywords.txt"
+#line 180 "src/lexer-keywords.txt"
       {"f64x2.splat", TokenType::Unary, Opcode::F64X2Splat},
       {""}, {""},
-#line 368 "src/lexer-keywords.txt"
+#line 369 "src/lexer-keywords.txt"
       {"i32x4.trunc_sat_f32x4_u", TokenType::Unary, Opcode::I32X4TruncSatF32X4U},
       {""}, {""},
-#line 538 "src/lexer-keywords.txt"
+#line 539 "src/lexer-keywords.txt"
       {"import", TokenType::Import},
-#line 367 "src/lexer-keywords.txt"
+#line 368 "src/lexer-keywords.txt"
       {"i32x4.trunc_sat_f32x4_s", TokenType::Unary, Opcode::I32X4TruncSatF32X4S},
-#line 491 "src/lexer-keywords.txt"
+#line 492 "src/lexer-keywords.txt"
       {"i64x2.splat", TokenType::Unary, Opcode::I64X2Splat},
       {""}, {""}, {""},
-#line 618 "src/lexer-keywords.txt"
+#line 619 "src/lexer-keywords.txt"
       {"v128.load32_lane", TokenType::SimdLoadLane, Opcode::V128Load32Lane},
-#line 529 "src/lexer-keywords.txt"
+#line 530 "src/lexer-keywords.txt"
       {"i8x16.shl", TokenType::Binary, Opcode::I8X16Shl},
       {""}, {""},
-#line 150 "src/lexer-keywords.txt"
+#line 151 "src/lexer-keywords.txt"
       {"f64.sqrt", TokenType::Unary, Opcode::F64Sqrt},
-#line 88 "src/lexer-keywords.txt"
+#line 89 "src/lexer-keywords.txt"
       {"f32.sqrt", TokenType::Unary, Opcode::F32Sqrt},
 #line 43 "src/lexer-keywords.txt"
       {"catch_ref", TokenType::CatchRef},
       {""},
-#line 596 "src/lexer-keywords.txt"
+#line 597 "src/lexer-keywords.txt"
       {"try_table", TokenType::TryTable, Opcode::TryTable},
       {""}, {""},
-#line 620 "src/lexer-keywords.txt"
+#line 621 "src/lexer-keywords.txt"
       {"v128.store8_lane", TokenType::SimdStoreLane, Opcode::V128Store8Lane},
       {""},
-#line 120 "src/lexer-keywords.txt"
+#line 121 "src/lexer-keywords.txt"
       {"f32x4.sqrt", TokenType::Unary, Opcode::F32X4Sqrt},
       {""}, {""}, {""},
 #line 36 "src/lexer-keywords.txt"
       {"br_table", TokenType::BrTable, Opcode::BrTable},
       {""}, {""}, {""},
-#line 194 "src/lexer-keywords.txt"
+#line 195 "src/lexer-keywords.txt"
       {"global", TokenType::Global},
       {""}, {""},
-#line 613 "src/lexer-keywords.txt"
+#line 614 "src/lexer-keywords.txt"
       {"v128.load32_splat", TokenType::Load, Opcode::V128Load32Splat},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""},
-#line 581 "src/lexer-keywords.txt"
+#line 582 "src/lexer-keywords.txt"
       {"shared", TokenType::Shared},
       {""}, {""},
-#line 231 "src/lexer-keywords.txt"
+#line 232 "src/lexer-keywords.txt"
       {"i16x8.shr_u", TokenType::Binary, Opcode::I16X8ShrU},
       {""},
-#line 230 "src/lexer-keywords.txt"
+#line 231 "src/lexer-keywords.txt"
       {"i16x8.shr_s", TokenType::Binary, Opcode::I16X8ShrS},
-#line 401 "src/lexer-keywords.txt"
+#line 402 "src/lexer-keywords.txt"
       {"i64.atomic.rmw8.xchg_u", TokenType::AtomicRmw, Opcode::I64AtomicRmw8XchgU},
-#line 264 "src/lexer-keywords.txt"
+#line 265 "src/lexer-keywords.txt"
       {"i32.atomic.rmw8.xchg_u", TokenType::AtomicRmw, Opcode::I32AtomicRmw8XchgU},
-#line 607 "src/lexer-keywords.txt"
+#line 608 "src/lexer-keywords.txt"
       {"v128.load32_zero", TokenType::Load, Opcode::V128Load32Zero},
       {""}, {""},
-#line 420 "src/lexer-keywords.txt"
+#line 421 "src/lexer-keywords.txt"
       {"i64.eqz", TokenType::Convert, Opcode::I64Eqz},
-#line 282 "src/lexer-keywords.txt"
+#line 283 "src/lexer-keywords.txt"
       {"i32.eqz", TokenType::Convert, Opcode::I32Eqz},
       {""}, {""}, {""}, {""}, {""}, {""},
-#line 611 "src/lexer-keywords.txt"
+#line 612 "src/lexer-keywords.txt"
       {"v128.xor", TokenType::Binary, Opcode::V128Xor},
       {""}, {""},
-#line 192 "src/lexer-keywords.txt"
+#line 193 "src/lexer-keywords.txt"
       {"global.get", TokenType::GlobalGet, Opcode::GlobalGet},
       {""},
-#line 193 "src/lexer-keywords.txt"
+#line 194 "src/lexer-keywords.txt"
       {"global.set", TokenType::GlobalSet, Opcode::GlobalSet},
       {""}, {""},
-#line 606 "src/lexer-keywords.txt"
+#line 607 "src/lexer-keywords.txt"
       {"v128.any_true", TokenType::Unary, Opcode::V128AnyTrue},
       {""}, {""}, {""}, {""},
-#line 173 "src/lexer-keywords.txt"
+#line 174 "src/lexer-keywords.txt"
       {"f64x2.pmin", TokenType::Binary, Opcode::F64X2PMin},
       {""}, {""}, {""},
-#line 418 "src/lexer-keywords.txt"
+#line 419 "src/lexer-keywords.txt"
       {"i64.div_u", TokenType::Binary, Opcode::I64DivU},
-#line 280 "src/lexer-keywords.txt"
+#line 281 "src/lexer-keywords.txt"
       {"i32.div_u", TokenType::Binary, Opcode::I32DivU},
-#line 417 "src/lexer-keywords.txt"
+#line 418 "src/lexer-keywords.txt"
       {"i64.div_s", TokenType::Binary, Opcode::I64DivS},
-#line 279 "src/lexer-keywords.txt"
+#line 280 "src/lexer-keywords.txt"
       {"i32.div_s", TokenType::Binary, Opcode::I32DivS},
-#line 470 "src/lexer-keywords.txt"
+#line 471 "src/lexer-keywords.txt"
       {"v128.load32x2_u", TokenType::Load, Opcode::V128Load32X2U},
       {""}, {""}, {""},
-#line 469 "src/lexer-keywords.txt"
+#line 470 "src/lexer-keywords.txt"
       {"v128.load32x2_s", TokenType::Load, Opcode::V128Load32X2S},
       {""}, {""}, {""}, {""},
-#line 219 "src/lexer-keywords.txt"
+#line 220 "src/lexer-keywords.txt"
       {"i16x8.min_u", TokenType::Binary, Opcode::I16X8MinU},
       {""},
-#line 218 "src/lexer-keywords.txt"
+#line 219 "src/lexer-keywords.txt"
       {"i16x8.min_s", TokenType::Binary, Opcode::I16X8MinS},
-#line 622 "src/lexer-keywords.txt"
+#line 623 "src/lexer-keywords.txt"
       {"v128.store32_lane", TokenType::SimdStoreLane, Opcode::V128Store32Lane},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""},
-#line 526 "src/lexer-keywords.txt"
+#line 527 "src/lexer-keywords.txt"
       {"i8x16.relaxed_swizzle", TokenType::Binary, Opcode::I8X16RelaxedSwizzle},
       {""}, {""}, {""},
-#line 552 "src/lexer-keywords.txt"
+#line 553 "src/lexer-keywords.txt"
       {"memory.grow", TokenType::MemoryGrow, Opcode::MemoryGrow},
       {""}, {""}, {""},
-#line 200 "src/lexer-keywords.txt"
+#line 201 "src/lexer-keywords.txt"
       {"i16x8.avgr_u", TokenType::Binary, Opcode::I16X8AvgrU},
-#line 205 "src/lexer-keywords.txt"
+#line 206 "src/lexer-keywords.txt"
       {"i16x8.extract_lane_u", TokenType::SimdLaneOp, Opcode::I16X8ExtractLaneU},
       {""},
-#line 204 "src/lexer-keywords.txt"
+#line 205 "src/lexer-keywords.txt"
       {"i16x8.extract_lane_s", TokenType::SimdLaneOp, Opcode::I16X8ExtractLaneS},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""},
-#line 463 "src/lexer-keywords.txt"
+#line 464 "src/lexer-keywords.txt"
       {"i64.trunc_sat_f32_u", TokenType::Convert, Opcode::I64TruncSatF32U},
-#line 319 "src/lexer-keywords.txt"
+#line 320 "src/lexer-keywords.txt"
       {"i32.trunc_sat_f32_u", TokenType::Convert, Opcode::I32TruncSatF32U},
       {""}, {""},
-#line 462 "src/lexer-keywords.txt"
+#line 463 "src/lexer-keywords.txt"
       {"i64.trunc_sat_f32_s", TokenType::Convert, Opcode::I64TruncSatF32S},
-#line 318 "src/lexer-keywords.txt"
+#line 319 "src/lexer-keywords.txt"
       {"i32.trunc_sat_f32_s", TokenType::Convert, Opcode::I32TruncSatF32S},
       {""}, {""}, {""}, {""}, {""}, {""},
-#line 565 "src/lexer-keywords.txt"
+#line 566 "src/lexer-keywords.txt"
       {"param", TokenType::Param},
       {""},
-#line 374 "src/lexer-keywords.txt"
+#line 375 "src/lexer-keywords.txt"
       {"i32x4.trunc_sat_f64x2_u_zero", TokenType::Unary, Opcode::I32X4TruncSatF64X2UZero},
       {""},
-#line 373 "src/lexer-keywords.txt"
+#line 374 "src/lexer-keywords.txt"
       {"i32x4.trunc_sat_f64x2_s_zero", TokenType::Unary, Opcode::I32X4TruncSatF64X2SZero},
       {""}, {""}, {""},
-#line 158 "src/lexer-keywords.txt"
+#line 159 "src/lexer-keywords.txt"
       {"f64x2.div", TokenType::Binary, Opcode::F64X2Div},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""},
-#line 130 "src/lexer-keywords.txt"
+#line 131 "src/lexer-keywords.txt"
       {"f64.convert_i32_u", TokenType::Convert, Opcode::F64ConvertI32U},
-#line 68 "src/lexer-keywords.txt"
+#line 69 "src/lexer-keywords.txt"
       {"f32.convert_i32_u", TokenType::Convert, Opcode::F32ConvertI32U},
       {""}, {""},
-#line 129 "src/lexer-keywords.txt"
+#line 130 "src/lexer-keywords.txt"
       {"f64.convert_i32_s", TokenType::Convert, Opcode::F64ConvertI32S},
-#line 67 "src/lexer-keywords.txt"
+#line 68 "src/lexer-keywords.txt"
       {"f32.convert_i32_s", TokenType::Convert, Opcode::F32ConvertI32S},
       {""},
-#line 388 "src/lexer-keywords.txt"
+#line 389 "src/lexer-keywords.txt"
       {"i64.atomic.rmw16.xor_u", TokenType::AtomicRmw, Opcode::I64AtomicRmw16XorU},
-#line 258 "src/lexer-keywords.txt"
+#line 259 "src/lexer-keywords.txt"
       {"i32.atomic.rmw16.xor_u", TokenType::AtomicRmw, Opcode::I32AtomicRmw16XorU},
-#line 621 "src/lexer-keywords.txt"
+#line 622 "src/lexer-keywords.txt"
       {"v128.store16_lane", TokenType::SimdStoreLane, Opcode::V128Store16Lane},
       {""},
-#line 387 "src/lexer-keywords.txt"
+#line 388 "src/lexer-keywords.txt"
       {"i64.atomic.rmw16.xchg_u", TokenType::AtomicRmw, Opcode::I64AtomicRmw16XchgU},
-#line 257 "src/lexer-keywords.txt"
+#line 258 "src/lexer-keywords.txt"
       {"i32.atomic.rmw16.xchg_u", TokenType::AtomicRmw, Opcode::I32AtomicRmw16XchgU},
-#line 531 "src/lexer-keywords.txt"
+#line 532 "src/lexer-keywords.txt"
       {"i8x16.shr_u", TokenType::Binary, Opcode::I8X16ShrU},
       {""},
-#line 530 "src/lexer-keywords.txt"
+#line 531 "src/lexer-keywords.txt"
       {"i8x16.shr_s", TokenType::Binary, Opcode::I8X16ShrS},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""},
 #line 44 "src/lexer-keywords.txt"
       {"catch_all_ref", TokenType::CatchAllRef},
-#line 181 "src/lexer-keywords.txt"
+#line 182 "src/lexer-keywords.txt"
       {"f64x2.sub", TokenType::Binary, Opcode::F64X2Sub},
 #line 39 "src/lexer-keywords.txt"
       {"call_ref", TokenType::CallRef, Opcode::CallRef},
 #line 26 "src/lexer-keywords.txt"
       {"assert_return", TokenType::AssertReturn},
       {""},
-#line 155 "src/lexer-keywords.txt"
+#line 156 "src/lexer-keywords.txt"
       {"f64x2.abs", TokenType::Unary, Opcode::F64X2Abs},
       {""}, {""}, {""},
-#line 492 "src/lexer-keywords.txt"
+#line 493 "src/lexer-keywords.txt"
       {"i64x2.sub", TokenType::Binary, Opcode::I64X2Sub},
       {""}, {""}, {""},
-#line 478 "src/lexer-keywords.txt"
+#line 479 "src/lexer-keywords.txt"
       {"i64x2.abs", TokenType::Unary, Opcode::I64X2Abs},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
-#line 520 "src/lexer-keywords.txt"
+#line 521 "src/lexer-keywords.txt"
       {"i8x16.min_u", TokenType::Binary, Opcode::I8X16MinU},
       {""},
-#line 519 "src/lexer-keywords.txt"
+#line 520 "src/lexer-keywords.txt"
       {"i8x16.min_s", TokenType::Binary, Opcode::I8X16MinS},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""},
-#line 398 "src/lexer-keywords.txt"
+#line 399 "src/lexer-keywords.txt"
       {"i64.atomic.rmw8.cmpxchg_u", TokenType::AtomicRmwCmpxchg, Opcode::I64AtomicRmw8CmpxchgU},
-#line 261 "src/lexer-keywords.txt"
+#line 262 "src/lexer-keywords.txt"
       {"i32.atomic.rmw8.cmpxchg_u", TokenType::AtomicRmwCmpxchg, Opcode::I32AtomicRmw8CmpxchgU},
       {""},
-#line 232 "src/lexer-keywords.txt"
+#line 233 "src/lexer-keywords.txt"
       {"i16x8.splat", TokenType::Unary, Opcode::I16X8Splat},
       {""},
-#line 504 "src/lexer-keywords.txt"
+#line 505 "src/lexer-keywords.txt"
       {"i8x16.avgr_u", TokenType::Binary, Opcode::I8X16AvgrU},
-#line 508 "src/lexer-keywords.txt"
+#line 509 "src/lexer-keywords.txt"
       {"i8x16.extract_lane_u", TokenType::SimdLaneOp, Opcode::I8X16ExtractLaneU},
       {""},
-#line 507 "src/lexer-keywords.txt"
+#line 508 "src/lexer-keywords.txt"
       {"i8x16.extract_lane_s", TokenType::SimdLaneOp, Opcode::I8X16ExtractLaneS},
       {""}, {""}, {""},
-#line 180 "src/lexer-keywords.txt"
+#line 181 "src/lexer-keywords.txt"
       {"f64x2.sqrt", TokenType::Unary, Opcode::F64X2Sqrt},
       {""}, {""}, {""},
-#line 328 "src/lexer-keywords.txt"
+#line 329 "src/lexer-keywords.txt"
       {"i32x4.relaxed_dot_i8x16_i7x16_add_s", TokenType::Ternary, Opcode::I32X4DotI8X16I7X16AddS},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""}, {""},
-#line 577 "src/lexer-keywords.txt"
+#line 578 "src/lexer-keywords.txt"
       {"return_call_ref", TokenType::ReturnCallRef, Opcode::ReturnCallRef},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
-#line 400 "src/lexer-keywords.txt"
+#line 401 "src/lexer-keywords.txt"
       {"i64.atomic.rmw8.sub_u", TokenType::AtomicRmw, Opcode::I64AtomicRmw8SubU},
-#line 263 "src/lexer-keywords.txt"
+#line 264 "src/lexer-keywords.txt"
       {"i32.atomic.rmw8.sub_u", TokenType::AtomicRmw, Opcode::I32AtomicRmw8SubU},
       {""}, {""}, {""}, {""},
-#line 594 "src/lexer-keywords.txt"
+#line 595 "src/lexer-keywords.txt"
       {"throw_ref", TokenType::ThrowRef, Opcode::ThrowRef},
-#line 61 "src/lexer-keywords.txt"
+#line 62 "src/lexer-keywords.txt"
       {"exnref", Type::ExnRef},
       {""},
-#line 619 "src/lexer-keywords.txt"
+#line 620 "src/lexer-keywords.txt"
       {"v128.load64_lane", TokenType::SimdLoadLane, Opcode::V128Load64Lane},
       {""}, {""}, {""}, {""}, {""},
-#line 384 "src/lexer-keywords.txt"
+#line 385 "src/lexer-keywords.txt"
       {"i64.atomic.rmw16.cmpxchg_u", TokenType::AtomicRmwCmpxchg, Opcode::I64AtomicRmw16CmpxchgU},
-#line 254 "src/lexer-keywords.txt"
+#line 255 "src/lexer-keywords.txt"
       {"i32.atomic.rmw16.cmpxchg_u", TokenType::AtomicRmwCmpxchg, Opcode::I32AtomicRmw16CmpxchgU},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""}, {""},
-#line 614 "src/lexer-keywords.txt"
+#line 615 "src/lexer-keywords.txt"
       {"v128.load64_splat", TokenType::Load, Opcode::V128Load64Splat},
       {""}, {""}, {""},
-#line 51 "src/lexer-keywords.txt"
+#line 52 "src/lexer-keywords.txt"
       {"drop", TokenType::Drop, Opcode::Drop},
-#line 327 "src/lexer-keywords.txt"
+#line 328 "src/lexer-keywords.txt"
       {"i32x4.bitmask", TokenType::Unary, Opcode::I32X4Bitmask},
       {""}, {""}, {""}, {""}, {""}, {""}, {""},
-#line 123 "src/lexer-keywords.txt"
+#line 124 "src/lexer-keywords.txt"
       {"f32x4.demote_f64x2_zero", TokenType::Unary, Opcode::F32X4DemoteF64X2Zero},
       {""}, {""},
-#line 484 "src/lexer-keywords.txt"
+#line 485 "src/lexer-keywords.txt"
       {"i64x2.extend_low_i32x4_u", TokenType::Unary, Opcode::I64X2ExtendLowI32X4U},
-#line 112 "src/lexer-keywords.txt"
+#line 113 "src/lexer-keywords.txt"
       {"f32x4.pmax", TokenType::Binary, Opcode::F32X4PMax},
-#line 482 "src/lexer-keywords.txt"
+#line 483 "src/lexer-keywords.txt"
       {"i64x2.extend_low_i32x4_s", TokenType::Unary, Opcode::I64X2ExtendLowI32X4S},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
-#line 532 "src/lexer-keywords.txt"
+#line 533 "src/lexer-keywords.txt"
       {"i8x16.splat", TokenType::Unary, Opcode::I8X16Splat},
       {""}, {""},
-#line 608 "src/lexer-keywords.txt"
+#line 609 "src/lexer-keywords.txt"
       {"v128.load64_zero", TokenType::Load, Opcode::V128Load64Zero},
-#line 405 "src/lexer-keywords.txt"
+#line 406 "src/lexer-keywords.txt"
       {"i64.atomic.rmw.cmpxchg", TokenType::AtomicRmwCmpxchg, Opcode::I64AtomicRmwCmpxchg},
-#line 268 "src/lexer-keywords.txt"
+#line 269 "src/lexer-keywords.txt"
       {"i32.atomic.rmw.cmpxchg", TokenType::AtomicRmwCmpxchg, Opcode::I32AtomicRmwCmpxchg},
       {""}, {""}, {""},
-#line 593 "src/lexer-keywords.txt"
+#line 594 "src/lexer-keywords.txt"
       {"throw", TokenType::Throw, Opcode::Throw},
       {""}, {""}, {""}, {""}, {""},
 #line 25 "src/lexer-keywords.txt"
       {"assert_malformed", TokenType::AssertMalformed},
       {""}, {""}, {""}, {""}, {""}, {""},
-#line 62 "src/lexer-keywords.txt"
+#line 63 "src/lexer-keywords.txt"
       {"export", TokenType::Export},
       {""}, {""}, {""}, {""},
-#line 550 "src/lexer-keywords.txt"
+#line 551 "src/lexer-keywords.txt"
       {"memory.copy", TokenType::MemoryCopy, Opcode::MemoryCopy},
       {""}, {""}, {""}, {""}, {""},
-#line 495 "src/lexer-keywords.txt"
+#line 496 "src/lexer-keywords.txt"
       {"i64x2.extmul_low_i32x4_u", TokenType::Binary, Opcode::I64X2ExtmulLowI32X4U},
       {""},
-#line 493 "src/lexer-keywords.txt"
+#line 494 "src/lexer-keywords.txt"
       {"i64x2.extmul_low_i32x4_s", TokenType::Binary, Opcode::I64X2ExtmulLowI32X4S},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""},
-#line 133 "src/lexer-keywords.txt"
+#line 134 "src/lexer-keywords.txt"
       {"f64.copysign", TokenType::Binary, Opcode::F64Copysign},
-#line 71 "src/lexer-keywords.txt"
+#line 72 "src/lexer-keywords.txt"
       {"f32.copysign", TokenType::Binary, Opcode::F32Copysign},
-#line 625 "src/lexer-keywords.txt"
+#line 626 "src/lexer-keywords.txt"
       {"i8x16.swizzle", TokenType::Binary, Opcode::I8X16Swizzle},
       {""}, {""}, {""}, {""}, {""},
-#line 624 "src/lexer-keywords.txt"
+#line 625 "src/lexer-keywords.txt"
       {"i8x16.shuffle", TokenType::SimdShuffleOp, Opcode::I8X16Shuffle},
       {""}, {""},
-#line 134 "src/lexer-keywords.txt"
+#line 135 "src/lexer-keywords.txt"
       {"f64.div", TokenType::Binary, Opcode::F64Div},
-#line 73 "src/lexer-keywords.txt"
+#line 74 "src/lexer-keywords.txt"
       {"f32.div", TokenType::Binary, Opcode::F32Div},
       {""}, {""}, {""}, {""}, {""}, {""},
-#line 546 "src/lexer-keywords.txt"
+#line 547 "src/lexer-keywords.txt"
       {"loop", TokenType::Loop, Opcode::Loop},
       {""}, {""}, {""}, {""}, {""}, {""},
-#line 235 "src/lexer-keywords.txt"
+#line 236 "src/lexer-keywords.txt"
       {"i16x8.sub", TokenType::Binary, Opcode::I16X8Sub},
       {""}, {""}, {""},
-#line 195 "src/lexer-keywords.txt"
+#line 196 "src/lexer-keywords.txt"
       {"i16x8.abs", TokenType::Unary, Opcode::I16X8Abs},
       {""}, {""}, {""}, {""}, {""}, {""}, {""},
-#line 575 "src/lexer-keywords.txt"
+#line 576 "src/lexer-keywords.txt"
       {"rethrow", TokenType::Rethrow, Opcode::Rethrow},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""},
-#line 587 "src/lexer-keywords.txt"
+#line 588 "src/lexer-keywords.txt"
       {"table.grow", TokenType::TableGrow, Opcode::TableGrow},
       {""},
-#line 410 "src/lexer-keywords.txt"
+#line 411 "src/lexer-keywords.txt"
       {"i64.atomic.store16", TokenType::AtomicStore, Opcode::I64AtomicStore16},
-#line 273 "src/lexer-keywords.txt"
+#line 274 "src/lexer-keywords.txt"
       {"i32.atomic.store16", TokenType::AtomicStore, Opcode::I32AtomicStore16},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""}, {""},
-#line 524 "src/lexer-keywords.txt"
+#line 525 "src/lexer-keywords.txt"
       {"i8x16.popcnt", TokenType::Unary, Opcode::I8X16Popcnt},
       {""},
-#line 617 "src/lexer-keywords.txt"
+#line 618 "src/lexer-keywords.txt"
       {"v128.load16_lane", TokenType::SimdLoadLane, Opcode::V128Load16Lane},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""},
-#line 612 "src/lexer-keywords.txt"
+#line 613 "src/lexer-keywords.txt"
       {"v128.load16_splat", TokenType::Load, Opcode::V128Load16Splat},
 #line 20 "src/lexer-keywords.txt"
       {"array", Type::Array, TokenType::Array},
       {""}, {""}, {""}, {""},
-#line 444 "src/lexer-keywords.txt"
+#line 445 "src/lexer-keywords.txt"
       {"i64.popcnt", TokenType::Unary, Opcode::I64Popcnt},
-#line 301 "src/lexer-keywords.txt"
+#line 302 "src/lexer-keywords.txt"
       {"i32.popcnt", TokenType::Unary, Opcode::I32Popcnt},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""},
-#line 370 "src/lexer-keywords.txt"
+#line 371 "src/lexer-keywords.txt"
       {"i32x4.extend_high_i16x8_u", TokenType::Unary, Opcode::I32X4ExtendHighI16X8U},
       {""},
-#line 369 "src/lexer-keywords.txt"
+#line 370 "src/lexer-keywords.txt"
       {"i32x4.extend_high_i16x8_s", TokenType::Unary, Opcode::I32X4ExtendHighI16X8S},
       {""}, {""}, {""}, {""}, {""},
-#line 97 "src/lexer-keywords.txt"
+#line 98 "src/lexer-keywords.txt"
       {"f32x4.convert_i32x4_u", TokenType::Unary, Opcode::F32X4ConvertI32X4U},
       {""},
-#line 96 "src/lexer-keywords.txt"
+#line 97 "src/lexer-keywords.txt"
       {"f32x4.convert_i32x4_s", TokenType::Unary, Opcode::F32X4ConvertI32X4S},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""},
-#line 535 "src/lexer-keywords.txt"
+#line 536 "src/lexer-keywords.txt"
       {"i8x16.sub", TokenType::Binary, Opcode::I8X16Sub},
       {""},
-#line 148 "src/lexer-keywords.txt"
+#line 149 "src/lexer-keywords.txt"
       {"f64.promote_f32", TokenType::Convert, Opcode::F64PromoteF32},
       {""},
-#line 499 "src/lexer-keywords.txt"
+#line 500 "src/lexer-keywords.txt"
       {"i8x16.abs", TokenType::Unary, Opcode::I8X16Abs},
       {""}, {""}, {""}, {""},
-#line 342 "src/lexer-keywords.txt"
+#line 343 "src/lexer-keywords.txt"
       {"v128.load16x4_u", TokenType::Load, Opcode::V128Load16X4U},
       {""}, {""},
-#line 481 "src/lexer-keywords.txt"
+#line 482 "src/lexer-keywords.txt"
       {"i64x2.bitmask", TokenType::Unary, Opcode::I64X2Bitmask},
-#line 341 "src/lexer-keywords.txt"
+#line 342 "src/lexer-keywords.txt"
       {"v128.load16x4_s", TokenType::Load, Opcode::V128Load16X4S},
-#line 365 "src/lexer-keywords.txt"
+#line 366 "src/lexer-keywords.txt"
       {"i32x4.extmul_high_i16x8_u", TokenType::Binary, Opcode::I32X4ExtmulHighI16X8U},
       {""},
-#line 363 "src/lexer-keywords.txt"
+#line 364 "src/lexer-keywords.txt"
       {"i32x4.extmul_high_i16x8_s", TokenType::Binary, Opcode::I32X4ExtmulHighI16X8S},
       {""}, {""}, {""}, {""}, {""}, {""},
-#line 627 "src/lexer-keywords.txt"
+#line 628 "src/lexer-keywords.txt"
       {"i64.sub128", TokenType::Quaternary, Opcode::I64Sub128},
-#line 172 "src/lexer-keywords.txt"
+#line 173 "src/lexer-keywords.txt"
       {"f64x2.pmax", TokenType::Binary, Opcode::F64X2PMax},
       {""}, {""}, {""}, {""},
-#line 564 "src/lexer-keywords.txt"
+#line 565 "src/lexer-keywords.txt"
       {"pagesize", TokenType::PageSize},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""},
-#line 372 "src/lexer-keywords.txt"
+#line 373 "src/lexer-keywords.txt"
       {"i32x4.extend_low_i16x8_u", TokenType::Unary, Opcode::I32X4ExtendLowI16X8U},
       {""},
-#line 371 "src/lexer-keywords.txt"
+#line 372 "src/lexer-keywords.txt"
       {"i32x4.extend_low_i16x8_s", TokenType::Unary, Opcode::I32X4ExtendLowI16X8S},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""},
-#line 53 "src/lexer-keywords.txt"
+#line 54 "src/lexer-keywords.txt"
       {"elem.drop", TokenType::ElemDrop, Opcode::ElemDrop},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""},
-#line 560 "src/lexer-keywords.txt"
+#line 561 "src/lexer-keywords.txt"
       {"nop", TokenType::Nop, Opcode::Nop},
-#line 227 "src/lexer-keywords.txt"
+#line 228 "src/lexer-keywords.txt"
       {"i16x8.relaxed_q15mulr_s", TokenType::Binary, Opcode::I16X8RelaxedQ15mulrS},
       {""}, {""}, {""},
-#line 364 "src/lexer-keywords.txt"
+#line 365 "src/lexer-keywords.txt"
       {"i32x4.extmul_low_i16x8_u", TokenType::Binary, Opcode::I32X4ExtmulLowI16X8U},
       {""},
-#line 362 "src/lexer-keywords.txt"
+#line 363 "src/lexer-keywords.txt"
       {"i32x4.extmul_low_i16x8_s", TokenType::Binary, Opcode::I32X4ExtmulLowI16X8S},
-#line 149 "src/lexer-keywords.txt"
+#line 150 "src/lexer-keywords.txt"
       {"f64.reinterpret_i64", TokenType::Convert, Opcode::F64ReinterpretI64},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
-#line 246 "src/lexer-keywords.txt"
+#line 247 "src/lexer-keywords.txt"
       {"i16x8.extend_low_i8x16_u", TokenType::Unary, Opcode::I16X8ExtendLowI8X16U},
       {""},
-#line 245 "src/lexer-keywords.txt"
+#line 246 "src/lexer-keywords.txt"
       {"i16x8.extend_low_i8x16_s", TokenType::Unary, Opcode::I16X8ExtendLowI8X16S},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""},
-#line 323 "src/lexer-keywords.txt"
+#line 324 "src/lexer-keywords.txt"
       {"i32.wrap_i64", TokenType::Convert, Opcode::I32WrapI64},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""},
-#line 240 "src/lexer-keywords.txt"
+#line 241 "src/lexer-keywords.txt"
       {"i16x8.extmul_low_i8x16_u", TokenType::Binary, Opcode::I16X8ExtmulLowI8X16U},
       {""},
-#line 238 "src/lexer-keywords.txt"
+#line 239 "src/lexer-keywords.txt"
       {"i16x8.extmul_low_i8x16_s", TokenType::Binary, Opcode::I16X8ExtmulLowI8X16S},
-#line 485 "src/lexer-keywords.txt"
+#line 486 "src/lexer-keywords.txt"
       {"i64x2.extend_high_i32x4_u", TokenType::Unary, Opcode::I64X2ExtendHighI32X4U},
       {""},
-#line 483 "src/lexer-keywords.txt"
+#line 484 "src/lexer-keywords.txt"
       {"i64x2.extend_high_i32x4_s", TokenType::Unary, Opcode::I64X2ExtendHighI32X4S},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""},
-#line 202 "src/lexer-keywords.txt"
+#line 203 "src/lexer-keywords.txt"
       {"i16x8.relaxed_dot_i8x16_i7x16_s", TokenType::Binary, Opcode::I16X8DotI8X16I7X16S},
       {""}, {""},
-#line 222 "src/lexer-keywords.txt"
+#line 223 "src/lexer-keywords.txt"
       {"i16x8.narrow_i32x4_u", TokenType::Binary, Opcode::I16X8NarrowI32X4U},
       {""},
-#line 221 "src/lexer-keywords.txt"
+#line 222 "src/lexer-keywords.txt"
       {"i16x8.narrow_i32x4_s", TokenType::Binary, Opcode::I16X8NarrowI32X4S},
       {""},
-#line 547 "src/lexer-keywords.txt"
+#line 548 "src/lexer-keywords.txt"
       {"memory.atomic.notify", TokenType::AtomicNotify, Opcode::MemoryAtomicNotify},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""},
-#line 361 "src/lexer-keywords.txt"
+#line 362 "src/lexer-keywords.txt"
       {"i32x4.extadd_pairwise_i16x8_u", TokenType::Unary, Opcode::I32X4ExtaddPairwiseI16X8U},
       {""},
-#line 360 "src/lexer-keywords.txt"
+#line 361 "src/lexer-keywords.txt"
       {"i32x4.extadd_pairwise_i16x8_s", TokenType::Unary, Opcode::I32X4ExtaddPairwiseI16X8S},
       {""}, {""}, {""}, {""}, {""},
-#line 496 "src/lexer-keywords.txt"
+#line 497 "src/lexer-keywords.txt"
       {"i64x2.extmul_high_i32x4_u", TokenType::Binary, Opcode::I64X2ExtmulHighI32X4U},
       {""},
-#line 494 "src/lexer-keywords.txt"
+#line 495 "src/lexer-keywords.txt"
       {"i64x2.extmul_high_i32x4_s", TokenType::Binary, Opcode::I64X2ExtmulHighI32X4S},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""},
@@ -1727,66 +1729,66 @@ Perfect_Hash::InWordSet (const char *str, size_t len)
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""},
-#line 445 "src/lexer-keywords.txt"
+#line 446 "src/lexer-keywords.txt"
       {"i64.reinterpret_f64", TokenType::Convert, Opcode::I64ReinterpretF64},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""},
-#line 87 "src/lexer-keywords.txt"
+#line 88 "src/lexer-keywords.txt"
       {"f32.reinterpret_i32", TokenType::Convert, Opcode::F32ReinterpretI32},
       {""},
-#line 152 "src/lexer-keywords.txt"
+#line 153 "src/lexer-keywords.txt"
       {"f64.sub", TokenType::Binary, Opcode::F64Sub},
-#line 90 "src/lexer-keywords.txt"
+#line 91 "src/lexer-keywords.txt"
       {"f32.sub", TokenType::Binary, Opcode::F32Sub},
 #line 27 "src/lexer-keywords.txt"
       {"assert_trap", TokenType::AssertTrap},
       {""}, {""},
-#line 201 "src/lexer-keywords.txt"
+#line 202 "src/lexer-keywords.txt"
       {"i16x8.bitmask", TokenType::Unary, Opcode::I16X8Bitmask},
       {""}, {""},
-#line 457 "src/lexer-keywords.txt"
+#line 458 "src/lexer-keywords.txt"
       {"i64.sub", TokenType::Binary, Opcode::I64Sub},
-#line 313 "src/lexer-keywords.txt"
+#line 314 "src/lexer-keywords.txt"
       {"i32.sub", TokenType::Binary, Opcode::I32Sub},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""},
-#line 135 "src/lexer-keywords.txt"
+#line 136 "src/lexer-keywords.txt"
       {"f64.eq", TokenType::Compare, Opcode::F64Eq},
-#line 74 "src/lexer-keywords.txt"
+#line 75 "src/lexer-keywords.txt"
       {"f32.eq", TokenType::Compare, Opcode::F32Eq},
       {""}, {""}, {""}, {""}, {""}, {""},
-#line 419 "src/lexer-keywords.txt"
+#line 420 "src/lexer-keywords.txt"
       {"i64.eq", TokenType::Compare, Opcode::I64Eq},
-#line 281 "src/lexer-keywords.txt"
+#line 282 "src/lexer-keywords.txt"
       {"i32.eq", TokenType::Compare, Opcode::I32Eq},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""},
-#line 99 "src/lexer-keywords.txt"
+#line 100 "src/lexer-keywords.txt"
       {"f32x4.eq", TokenType::Compare, Opcode::F32X4Eq},
       {""}, {""}, {""}, {""}, {""}, {""}, {""},
-#line 329 "src/lexer-keywords.txt"
+#line 330 "src/lexer-keywords.txt"
       {"i32x4.eq", TokenType::Compare, Opcode::I32X4Eq},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""},
-#line 601 "src/lexer-keywords.txt"
+#line 602 "src/lexer-keywords.txt"
       {"v128.bitselect", TokenType::Ternary, Opcode::V128BitSelect},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""},
-#line 548 "src/lexer-keywords.txt"
+#line 549 "src/lexer-keywords.txt"
       {"memory.atomic.wait32", TokenType::AtomicWait, Opcode::MemoryAtomicWait32},
 #line 22 "src/lexer-keywords.txt"
       {"assert_exception", TokenType::AssertException},
       {""}, {""}, {""}, {""}, {""},
-#line 505 "src/lexer-keywords.txt"
+#line 506 "src/lexer-keywords.txt"
       {"i8x16.bitmask", TokenType::Unary, Opcode::I8X16Bitmask},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""},
-#line 302 "src/lexer-keywords.txt"
+#line 303 "src/lexer-keywords.txt"
       {"i32.reinterpret_f32", TokenType::Convert, Opcode::I32ReinterpretF32},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
@@ -1797,7 +1799,7 @@ Perfect_Hash::InWordSet (const char *str, size_t len)
       {"assert_invalid", TokenType::AssertInvalid},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""},
-#line 549 "src/lexer-keywords.txt"
+#line 550 "src/lexer-keywords.txt"
       {"memory.atomic.wait64", TokenType::AtomicWait, Opcode::MemoryAtomicWait64},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
@@ -1811,22 +1813,22 @@ Perfect_Hash::InWordSet (const char *str, size_t len)
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""},
-#line 407 "src/lexer-keywords.txt"
+#line 408 "src/lexer-keywords.txt"
       {"i64.atomic.rmw.sub", TokenType::AtomicRmw, Opcode::I64AtomicRmwSub},
-#line 270 "src/lexer-keywords.txt"
+#line 271 "src/lexer-keywords.txt"
       {"i32.atomic.rmw.sub", TokenType::AtomicRmw, Opcode::I32AtomicRmwSub},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""},
-#line 184 "src/lexer-keywords.txt"
+#line 185 "src/lexer-keywords.txt"
       {"f64x2.convert_low_i32x4_u", TokenType::Unary, Opcode::F64X2ConvertLowI32X4U},
       {""},
-#line 183 "src/lexer-keywords.txt"
+#line 184 "src/lexer-keywords.txt"
       {"f64x2.convert_low_i32x4_s", TokenType::Unary, Opcode::F64X2ConvertLowI32X4S},
       {""},
-#line 159 "src/lexer-keywords.txt"
+#line 160 "src/lexer-keywords.txt"
       {"f64x2.eq", TokenType::Compare, Opcode::F64X2Eq},
       {""}, {""}, {""}, {""}, {""}, {""}, {""},
-#line 472 "src/lexer-keywords.txt"
+#line 473 "src/lexer-keywords.txt"
       {"i64x2.eq", TokenType::Binary, Opcode::I64X2Eq},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
@@ -1843,22 +1845,22 @@ Perfect_Hash::InWordSet (const char *str, size_t len)
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""},
-#line 244 "src/lexer-keywords.txt"
+#line 245 "src/lexer-keywords.txt"
       {"i16x8.extend_high_i8x16_u", TokenType::Unary, Opcode::I16X8ExtendHighI8X16U},
       {""},
-#line 243 "src/lexer-keywords.txt"
+#line 244 "src/lexer-keywords.txt"
       {"i16x8.extend_high_i8x16_s", TokenType::Unary, Opcode::I16X8ExtendHighI8X16S},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""}, {""},
-#line 224 "src/lexer-keywords.txt"
+#line 225 "src/lexer-keywords.txt"
       {"i16x8.q15mulr_sat_s", TokenType::Binary, Opcode::I16X8Q15mulrSatS},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""},
-#line 241 "src/lexer-keywords.txt"
+#line 242 "src/lexer-keywords.txt"
       {"i16x8.extmul_high_i8x16_u", TokenType::Binary, Opcode::I16X8ExtmulHighI8X16U},
       {""},
-#line 239 "src/lexer-keywords.txt"
+#line 240 "src/lexer-keywords.txt"
       {"i16x8.extmul_high_i8x16_s", TokenType::Binary, Opcode::I16X8ExtmulHighI8X16S},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
@@ -1870,18 +1872,18 @@ Perfect_Hash::InWordSet (const char *str, size_t len)
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""},
-#line 203 "src/lexer-keywords.txt"
+#line 204 "src/lexer-keywords.txt"
       {"i16x8.eq", TokenType::Compare, Opcode::I16X8Eq},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
-#line 185 "src/lexer-keywords.txt"
+#line 186 "src/lexer-keywords.txt"
       {"f64x2.promote_low_f32x4", TokenType::Unary, Opcode::F64X2PromoteLowF32X4},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""},
-#line 522 "src/lexer-keywords.txt"
+#line 523 "src/lexer-keywords.txt"
       {"i8x16.narrow_i16x8_u", TokenType::Binary, Opcode::I8X16NarrowI16X8U},
       {""},
-#line 521 "src/lexer-keywords.txt"
+#line 522 "src/lexer-keywords.txt"
       {"i8x16.narrow_i16x8_s", TokenType::Binary, Opcode::I8X16NarrowI16X8S},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
@@ -1890,15 +1892,15 @@ Perfect_Hash::InWordSet (const char *str, size_t len)
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
-#line 237 "src/lexer-keywords.txt"
+#line 238 "src/lexer-keywords.txt"
       {"i16x8.extadd_pairwise_i8x16_u", TokenType::Unary, Opcode::I16X8ExtaddPairwiseI8X16U},
       {""},
-#line 236 "src/lexer-keywords.txt"
+#line 237 "src/lexer-keywords.txt"
       {"i16x8.extadd_pairwise_i8x16_s", TokenType::Unary, Opcode::I16X8ExtaddPairwiseI8X16S},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
       {""}, {""}, {""}, {""}, {""}, {""},
-#line 506 "src/lexer-keywords.txt"
+#line 507 "src/lexer-keywords.txt"
       {"i8x16.eq", TokenType::Compare, Opcode::I8X16Eq}
     };
 #if (defined __GNUC__ && __GNUC__ + (__GNUC_MINOR__ >= 6) > 4) || (defined __clang__ && __clang_major__ >= 3)
diff --git a/src/tools/spectest-interp.cc b/src/tools/spectest-interp.cc
index 8fd15b4d2b..900db403c6 100644
--- a/src/tools/spectest-interp.cc
+++ b/src/tools/spectest-interp.cc
@@ -140,6 +140,7 @@ class ModuleCommand : public CommandMixin<CommandType::Module> {
   ModuleType module = ModuleType::Binary;
   std::string filename;
   std::string name;
+  bool is_definition;
 };
 
 class Action {
@@ -378,6 +379,7 @@ class JSONParser {
   wabt::Result ParseString(std::string* out_string);
   wabt::Result ParseKeyStringValue(const char* key, std::string* out_string);
   wabt::Result ParseOptNameStringValue(std::string* out_string);
+  wabt::Result ParseOptIsDefinitionValue(bool* out_is_definition);
   wabt::Result ParseLine(uint32_t* out_line_number);
   wabt::Result ParseType(Type* out_type);
   wabt::Result ParseTypeObject(Type* out_type);
@@ -606,6 +608,24 @@ wabt::Result JSONParser::ParseOptNameStringValue(std::string* out_string) {
   return wabt::Result::Ok;
 }
 
+wabt::Result JSONParser::ParseOptIsDefinitionValue(bool* out_is_definition) {
+  if (Match("\"definition\"")) {
+    EXPECT(":");
+    std::string value;
+    CHECK_RESULT(ParseString(&value));
+    if (value == "true") {
+      *out_is_definition = true;
+    } else if (value == "false") {
+      *out_is_definition = false;
+    } else {
+      PrintError("unknown bool value: \"%s\"", value.c_str());
+      return wabt::Result::Error;
+    }
+    EXPECT(",");
+  }
+  return wabt::Result::Ok;
+}
+
 wabt::Result JSONParser::ParseLine(uint32_t* out_line_number) {
   EXPECT_KEY("line");
   CHECK_RESULT(ParseUint32(out_line_number));
@@ -1054,6 +1074,7 @@ wabt::Result JSONParser::ParseCommand(CommandPtr* out_command) {
   if (Match("\"module\"")) {
     auto command = std::make_unique<ModuleCommand>();
     EXPECT(",");
+    CHECK_RESULT(ParseOptIsDefinitionValue(&command->is_definition));
     CHECK_RESULT(ParseLine(&command->line));
     EXPECT(",");
     CHECK_RESULT(ParseOptNameStringValue(&command->name));
@@ -1625,6 +1646,14 @@ wabt::Result CommandRunner::OnModuleCommand(const ModuleCommand* command) {
     return wabt::Result::Error;
   }
 
+  if (command->is_definition) {
+    if (!command->name.empty()) {
+      PrintError(command->line, "only instantiated modules can have names");
+      return wabt::Result::Error;
+    }
+    return wabt::Result::Ok;
+  }
+
   RefVec imports;
   PopulateImports(module, &imports);
 
diff --git a/src/wast-parser.cc b/src/wast-parser.cc
index 4fcfd4dbdc..a20710454e 100644
--- a/src/wast-parser.cc
+++ b/src/wast-parser.cc
@@ -3825,6 +3825,7 @@ Result WastParser::ParseModuleCommand(Script* script, CommandPtr* out_command) {
       auto command = std::make_unique<ModuleCommand>();
       module = &command->module;
       *module = std::move(cast<TextScriptModule>(script_module.get())->module);
+      command->is_definition = script_module->is_definition;
       *out_command = std::move(command);
       break;
     }
@@ -4012,6 +4013,7 @@ Result WastParser::ParseScriptModule(
   EXPECT(Lpar);
   Location loc = GetLocation();
   EXPECT(Module);
+  bool is_definition = Match(TokenType::Definition);
   std::string name;
   CHECK_RESULT(ParseBindVarOpt(&name));
 
@@ -4062,6 +4064,7 @@ Result WastParser::ParseScriptModule(
     }
   }
 
+  (*out_module)->is_definition = is_definition;
   EXPECT(Rpar);
   return Result::Ok;
 }
diff --git a/test/gen-spec-js.py b/test/gen-spec-js.py
index 470e4b30d8..39468588b8 100755
--- a/test/gen-spec-js.py
+++ b/test/gen-spec-js.py
@@ -403,13 +403,17 @@ def _ModuleIdxName(self):
         return '$%d' % self.module_idx
 
     def _WriteModuleCommand(self, command):
-        self.module_idx += 1
-        idx_name = self._ModuleIdxName()
 
-        self.out_file.write('let %s = instance("%s");\n' %
-                            (idx_name, self._Module(command['filename'])))
-        if 'name' in command:
-            self.out_file.write('let %s = %s;\n' % (command['name'], idx_name))
+        if 'definition' in command:
+            self.out_file.write('definition("%s");\n' %
+                                (self._Module(command['filename'])))
+        else:
+            self.module_idx += 1
+            idx_name = self._ModuleIdxName()
+            self.out_file.write('let %s = instance("%s");\n' %
+                                (idx_name, self._Module(command['filename'])))
+            if 'name' in command:
+                self.out_file.write('let %s = %s;\n' % (command['name'], idx_name))
 
     def _WriteActionCommand(self, command):
         self.out_file.write('%s;\n' % self._Action(command['action']))
diff --git a/test/gen-spec-js/is_definition.txt b/test/gen-spec-js/is_definition.txt
new file mode 100644
index 0000000000..a4eae9d2f4
--- /dev/null
+++ b/test/gen-spec-js/is_definition.txt
@@ -0,0 +1,14 @@
+;;; TOOL: run-gen-spec-js
+;;; ARGS: --prefix=%(test_dir)s/gen-spec-empty-prefix.js
+(module definition (memory 65536))
+(module (memory 1))
+(;; STDOUT ;;;
+// A deliberately empty file for testing.
+
+// is_definition.txt:3
+definition("\x00\x61\x73\x6d\x01\x00\x00\x00\x05\x05\x01\x00\x80\x80\x04");
+
+// is_definition.txt:4
+let $1 = instance("\x00\x61\x73\x6d\x01\x00\x00\x00\x05\x03\x01\x00\x01");
+
+;;; STDOUT ;;)