Add support for destructuring variable declarations

Change-Id: Ia7f894fb61cfa760e253963ab4815d98103cfd9b
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

4 files changed, 45 insertions, 263 deletions

diff --git a/src/qml/compiler/qv4codegen.cpp b/src/qml/compiler/qv4codegen.cpp
index 0323012686..151e98c673 100644
--- a/src/qml/compiler/qv4codegen.cpp
+++ b/src/qml/compiler/qv4codegen.cpp
@@ -380,14 +380,7 @@ void Codegen::variableDeclaration(PatternElement *ast)
 
     if (!ast->initializer)
         return;
-    Reference rhs = expression(ast->initializer);
-    if (hasError)
-        return;
-
-    Reference lhs = referenceForName(ast->bindingIdentifier, true);
-    //### if lhs is a temp, this won't generate a temp-to-temp move. Same for when rhs is a const
-    rhs.loadInAccumulator();
-    lhs.storeConsumeAccumulator();
+    initializeAndDestructureBindingElement(ast, Reference());
 }
 
 void Codegen::variableDeclarationList(VariableDeclarationList *ast)
@@ -401,19 +394,25 @@ void Codegen::initializeAndDestructureBindingElement(AST::PatternElement *e, con
 {
     RegisterScope scope(this);
     Reference varToStore = e->bindingIdentifier.isNull() ? Reference::fromStackSlot(this, bytecodeGenerator->newRegister()) : referenceForName(e->bindingIdentifier, true);
-    if (e->initializer && baseRef == varToStore) {
-        baseRef.loadInAccumulator();
-        BytecodeGenerator::Jump jump = bytecodeGenerator->jumpNotUndefined();
-        expression(e->initializer).loadInAccumulator();
-        varToStore.storeConsumeAccumulator();
-        jump.link();
-    } else if (e->initializer) {
-        baseRef.loadInAccumulator();
-        BytecodeGenerator::Jump jump = bytecodeGenerator->jumpNotUndefined();
-        expression(e->initializer).loadInAccumulator();
-        jump.link();
-        varToStore.storeConsumeAccumulator();
-    } else if (baseRef != varToStore) {
+    if (e->initializer) {
+        if (!baseRef.isValid()) {
+            // assignment
+            expression(e->initializer).loadInAccumulator();
+            varToStore.storeConsumeAccumulator();
+        } else if (baseRef == varToStore) {
+            baseRef.loadInAccumulator();
+            BytecodeGenerator::Jump jump = bytecodeGenerator->jumpNotUndefined();
+            expression(e->initializer).loadInAccumulator();
+            varToStore.storeConsumeAccumulator();
+            jump.link();
+        } else {
+            baseRef.loadInAccumulator();
+            BytecodeGenerator::Jump jump = bytecodeGenerator->jumpNotUndefined();
+            expression(e->initializer).loadInAccumulator();
+            jump.link();
+            varToStore.storeConsumeAccumulator();
+        }
+    } else if (baseRef != varToStore && baseRef.isValid()) {
         baseRef.loadInAccumulator();
         varToStore.storeConsumeAccumulator();
     }
diff --git a/src/qml/compiler/qv4compilerscanfunctions.cpp b/src/qml/compiler/qv4compilerscanfunctions.cpp
index 3f98d7fd67..c6e792fc45 100644
--- a/src/qml/compiler/qv4compilerscanfunctions.cpp
+++ b/src/qml/compiler/qv4compilerscanfunctions.cpp
@@ -196,18 +196,30 @@ bool ScanFunctions::visit(PatternElement *ast)
     if (!ast->isVariableDeclaration())
         return true;
 
-    if (_context->isStrict && (ast->bindingIdentifier == QLatin1String("eval") || ast->bindingIdentifier == QLatin1String("arguments")))
-        _cg->throwSyntaxError(ast->identifierToken, QStringLiteral("Variable name may not be eval or arguments in strict mode"));
-    checkName(QStringRef(&ast->bindingIdentifier), ast->identifierToken);
-    if (ast->bindingIdentifier == QLatin1String("arguments"))
-        _context->usesArgumentsObject = Context::ArgumentsObjectNotUsed;
-    if (ast->scope == VariableScope::Const && !ast->initializer) {
-        _cg->throwSyntaxError(ast->identifierToken, QStringLiteral("Missing initializer in const declaration"));
-        return false;
-    }
-    if (!_context->addLocalVar(ast->bindingIdentifier, ast->initializer ? Context::VariableDefinition : Context::VariableDeclaration, ast->scope)) {
-        _cg->throwSyntaxError(ast->identifierToken, QStringLiteral("Identifier %1 has already been declared").arg(ast->bindingIdentifier));
-        return false;
+    QStringList names;
+    ast->boundNames(&names);
+
+    for (const QString &name : qAsConst(names)) {
+        if (_context->isStrict && (name == QLatin1String("eval") || name == QLatin1String("arguments")))
+            _cg->throwSyntaxError(ast->identifierToken, QStringLiteral("Variable name may not be eval or arguments in strict mode"));
+        checkName(QStringRef(&name), ast->identifierToken);
+        if (name == QLatin1String("arguments"))
+            _context->usesArgumentsObject = Context::ArgumentsObjectNotUsed;
+        if (ast->scope == VariableScope::Const && !ast->initializer) {
+            _cg->throwSyntaxError(ast->identifierToken, QStringLiteral("Missing initializer in const declaration"));
+            return false;
+        }
+        const Context::Member *m = nullptr;
+        if (_context->memberInfo(name, &m)) {
+            if (m->isLexicallyScoped() || ast->isLexicallyScoped()) {
+                _cg->throwSyntaxError(ast->identifierToken, QStringLiteral("Identifier %1 has already been declared").arg(name));
+                return false;
+            }
+        }
+        if (!_context->addLocalVar(name, ast->initializer ? Context::VariableDefinition : Context::VariableDeclaration, ast->scope)) {
+            _cg->throwSyntaxError(ast->identifierToken, QStringLiteral("Identifier %1 has already been declared").arg(ast->bindingIdentifier));
+            return false;
+        }
     }
     return true;
 }
diff --git a/src/qml/parser/qqmljs.g b/src/qml/parser/qqmljs.g
index 5200779924..bf733dd6cd 100644
--- a/src/qml/parser/qqmljs.g
+++ b/src/qml/parser/qqmljs.g
@@ -2824,7 +2824,6 @@ VariableDeclaration: BindingPattern Initializer;
 VariableDeclaration_In: BindingPattern Initializer_In;
 /.
     case $rule_number: {
-    UNIMPLEMENTED;
         auto *node = new (pool) AST::PatternElement(sym(1).Pattern, sym(2).Expression);
         node->identifierToken = loc(1);
         sym(1).Node = node;
diff --git a/tests/auto/qml/ecmascripttests/TestExpectations b/tests/auto/qml/ecmascripttests/TestExpectations
index 5b1301247e..8823e5a94a 100644
--- a/tests/auto/qml/ecmascripttests/TestExpectations
+++ b/tests/auto/qml/ecmascripttests/TestExpectations
@@ -7639,32 +7639,17 @@ language/statements/const/dstr-ary-ptrn-elem-ary-elem-iter
 language/statements/const/dstr-ary-ptrn-elem-ary-elision-init
 language/statements/const/dstr-ary-ptrn-elem-ary-elision-iter
 language/statements/const/dstr-ary-ptrn-elem-ary-empty-init
-language/statements/const/dstr-ary-ptrn-elem-ary-empty-iter
 language/statements/const/dstr-ary-ptrn-elem-ary-rest-init
 language/statements/const/dstr-ary-ptrn-elem-ary-rest-iter
-language/statements/const/dstr-ary-ptrn-elem-ary-val-null
-language/statements/const/dstr-ary-ptrn-elem-id-init-exhausted
 language/statements/const/dstr-ary-ptrn-elem-id-init-fn-name-arrow
 language/statements/const/dstr-ary-ptrn-elem-id-init-fn-name-class
 language/statements/const/dstr-ary-ptrn-elem-id-init-fn-name-cover
 language/statements/const/dstr-ary-ptrn-elem-id-init-fn-name-fn
 language/statements/const/dstr-ary-ptrn-elem-id-init-fn-name-gen
-language/statements/const/dstr-ary-ptrn-elem-id-init-hole
 language/statements/const/dstr-ary-ptrn-elem-id-init-skipped
-language/statements/const/dstr-ary-ptrn-elem-id-init-throws
-language/statements/const/dstr-ary-ptrn-elem-id-init-undef
-language/statements/const/dstr-ary-ptrn-elem-id-init-unresolvable
-language/statements/const/dstr-ary-ptrn-elem-id-iter-complete
-language/statements/const/dstr-ary-ptrn-elem-id-iter-done
 language/statements/const/dstr-ary-ptrn-elem-id-iter-step-err
 language/statements/const/dstr-ary-ptrn-elem-id-iter-val
 language/statements/const/dstr-ary-ptrn-elem-id-iter-val-err
-language/statements/const/dstr-ary-ptrn-elem-obj-id
-language/statements/const/dstr-ary-ptrn-elem-obj-id-init
-language/statements/const/dstr-ary-ptrn-elem-obj-prop-id
-language/statements/const/dstr-ary-ptrn-elem-obj-prop-id-init
-language/statements/const/dstr-ary-ptrn-elem-obj-val-null
-language/statements/const/dstr-ary-ptrn-elem-obj-val-undef
 language/statements/const/dstr-ary-ptrn-elision
 language/statements/const/dstr-ary-ptrn-elision-exhausted
 language/statements/const/dstr-ary-ptrn-elision-step-err
@@ -7681,36 +7666,13 @@ language/statements/const/dstr-ary-ptrn-rest-id-iter-step-err
 language/statements/const/dstr-ary-ptrn-rest-id-iter-val-err
 language/statements/const/dstr-ary-ptrn-rest-obj-id
 language/statements/const/dstr-ary-ptrn-rest-obj-prop-id
-language/statements/const/dstr-obj-init-null
-language/statements/const/dstr-obj-init-undefined
-language/statements/const/dstr-obj-ptrn-empty
-language/statements/const/dstr-obj-ptrn-id-get-value-err
 language/statements/const/dstr-obj-ptrn-id-init-fn-name-arrow
 language/statements/const/dstr-obj-ptrn-id-init-fn-name-class
 language/statements/const/dstr-obj-ptrn-id-init-fn-name-cover
 language/statements/const/dstr-obj-ptrn-id-init-fn-name-fn
 language/statements/const/dstr-obj-ptrn-id-init-fn-name-gen
-language/statements/const/dstr-obj-ptrn-id-init-skipped
-language/statements/const/dstr-obj-ptrn-id-init-throws
-language/statements/const/dstr-obj-ptrn-id-init-unresolvable
-language/statements/const/dstr-obj-ptrn-id-trailing-comma
-language/statements/const/dstr-obj-ptrn-list-err
 language/statements/const/dstr-obj-ptrn-prop-ary
 language/statements/const/dstr-obj-ptrn-prop-ary-init
-language/statements/const/dstr-obj-ptrn-prop-ary-trailing-comma
-language/statements/const/dstr-obj-ptrn-prop-ary-value-null
-language/statements/const/dstr-obj-ptrn-prop-eval-err
-language/statements/const/dstr-obj-ptrn-prop-id
-language/statements/const/dstr-obj-ptrn-prop-id-get-value-err
-language/statements/const/dstr-obj-ptrn-prop-id-init
-language/statements/const/dstr-obj-ptrn-prop-id-init-skipped
-language/statements/const/dstr-obj-ptrn-prop-id-init-throws
-language/statements/const/dstr-obj-ptrn-prop-id-init-unresolvable
-language/statements/const/dstr-obj-ptrn-prop-id-trailing-comma
-language/statements/const/dstr-obj-ptrn-prop-obj
-language/statements/const/dstr-obj-ptrn-prop-obj-init
-language/statements/const/dstr-obj-ptrn-prop-obj-value-null
-language/statements/const/dstr-obj-ptrn-prop-obj-value-undef
 language/statements/const/fn-name-arrow
 language/statements/const/fn-name-class
 language/statements/const/fn-name-cover
@@ -7737,32 +7699,17 @@ language/statements/for/dstr-const-ary-ptrn-elem-ary-elem-iter
 language/statements/for/dstr-const-ary-ptrn-elem-ary-elision-init
 language/statements/for/dstr-const-ary-ptrn-elem-ary-elision-iter
 language/statements/for/dstr-const-ary-ptrn-elem-ary-empty-init
-language/statements/for/dstr-const-ary-ptrn-elem-ary-empty-iter
 language/statements/for/dstr-const-ary-ptrn-elem-ary-rest-init
 language/statements/for/dstr-const-ary-ptrn-elem-ary-rest-iter
-language/statements/for/dstr-const-ary-ptrn-elem-ary-val-null
-language/statements/for/dstr-const-ary-ptrn-elem-id-init-exhausted
 language/statements/for/dstr-const-ary-ptrn-elem-id-init-fn-name-arrow
 language/statements/for/dstr-const-ary-ptrn-elem-id-init-fn-name-class
 language/statements/for/dstr-const-ary-ptrn-elem-id-init-fn-name-cover
 language/statements/for/dstr-const-ary-ptrn-elem-id-init-fn-name-fn
 language/statements/for/dstr-const-ary-ptrn-elem-id-init-fn-name-gen
-language/statements/for/dstr-const-ary-ptrn-elem-id-init-hole
 language/statements/for/dstr-const-ary-ptrn-elem-id-init-skipped
-language/statements/for/dstr-const-ary-ptrn-elem-id-init-throws
-language/statements/for/dstr-const-ary-ptrn-elem-id-init-undef
-language/statements/for/dstr-const-ary-ptrn-elem-id-init-unresolvable
-language/statements/for/dstr-const-ary-ptrn-elem-id-iter-complete
-language/statements/for/dstr-const-ary-ptrn-elem-id-iter-done
 language/statements/for/dstr-const-ary-ptrn-elem-id-iter-step-err
 language/statements/for/dstr-const-ary-ptrn-elem-id-iter-val
 language/statements/for/dstr-const-ary-ptrn-elem-id-iter-val-err
-language/statements/for/dstr-const-ary-ptrn-elem-obj-id
-language/statements/for/dstr-const-ary-ptrn-elem-obj-id-init
-language/statements/for/dstr-const-ary-ptrn-elem-obj-prop-id
-language/statements/for/dstr-const-ary-ptrn-elem-obj-prop-id-init
-language/statements/for/dstr-const-ary-ptrn-elem-obj-val-null
-language/statements/for/dstr-const-ary-ptrn-elem-obj-val-undef
 language/statements/for/dstr-const-ary-ptrn-elision
 language/statements/for/dstr-const-ary-ptrn-elision-exhausted
 language/statements/for/dstr-const-ary-ptrn-elision-iter-close
@@ -7781,36 +7728,13 @@ language/statements/for/dstr-const-ary-ptrn-rest-id-iter-step-err
 language/statements/for/dstr-const-ary-ptrn-rest-id-iter-val-err
 language/statements/for/dstr-const-ary-ptrn-rest-obj-id
 language/statements/for/dstr-const-ary-ptrn-rest-obj-prop-id
-language/statements/for/dstr-const-obj-init-null
-language/statements/for/dstr-const-obj-init-undefined
-language/statements/for/dstr-const-obj-ptrn-empty
-language/statements/for/dstr-const-obj-ptrn-id-get-value-err
 language/statements/for/dstr-const-obj-ptrn-id-init-fn-name-arrow
 language/statements/for/dstr-const-obj-ptrn-id-init-fn-name-class
 language/statements/for/dstr-const-obj-ptrn-id-init-fn-name-cover
 language/statements/for/dstr-const-obj-ptrn-id-init-fn-name-fn
 language/statements/for/dstr-const-obj-ptrn-id-init-fn-name-gen
-language/statements/for/dstr-const-obj-ptrn-id-init-skipped
-language/statements/for/dstr-const-obj-ptrn-id-init-throws
-language/statements/for/dstr-const-obj-ptrn-id-init-unresolvable
-language/statements/for/dstr-const-obj-ptrn-id-trailing-comma
-language/statements/for/dstr-const-obj-ptrn-list-err
 language/statements/for/dstr-const-obj-ptrn-prop-ary
 language/statements/for/dstr-const-obj-ptrn-prop-ary-init
-language/statements/for/dstr-const-obj-ptrn-prop-ary-trailing-comma
-language/statements/for/dstr-const-obj-ptrn-prop-ary-value-null
-language/statements/for/dstr-const-obj-ptrn-prop-eval-err
-language/statements/for/dstr-const-obj-ptrn-prop-id
-language/statements/for/dstr-const-obj-ptrn-prop-id-get-value-err
-language/statements/for/dstr-const-obj-ptrn-prop-id-init
-language/statements/for/dstr-const-obj-ptrn-prop-id-init-skipped
-language/statements/for/dstr-const-obj-ptrn-prop-id-init-throws
-language/statements/for/dstr-const-obj-ptrn-prop-id-init-unresolvable
-language/statements/for/dstr-const-obj-ptrn-prop-id-trailing-comma
-language/statements/for/dstr-const-obj-ptrn-prop-obj
-language/statements/for/dstr-const-obj-ptrn-prop-obj-init
-language/statements/for/dstr-const-obj-ptrn-prop-obj-value-null
-language/statements/for/dstr-const-obj-ptrn-prop-obj-value-undef
 language/statements/for/dstr-let-ary-init-iter-close
 language/statements/for/dstr-let-ary-init-iter-get-err
 language/statements/for/dstr-let-ary-init-iter-no-close
@@ -7820,32 +7744,17 @@ language/statements/for/dstr-let-ary-ptrn-elem-ary-elem-iter
 language/statements/for/dstr-let-ary-ptrn-elem-ary-elision-init
 language/statements/for/dstr-let-ary-ptrn-elem-ary-elision-iter
 language/statements/for/dstr-let-ary-ptrn-elem-ary-empty-init
-language/statements/for/dstr-let-ary-ptrn-elem-ary-empty-iter
 language/statements/for/dstr-let-ary-ptrn-elem-ary-rest-init
 language/statements/for/dstr-let-ary-ptrn-elem-ary-rest-iter
-language/statements/for/dstr-let-ary-ptrn-elem-ary-val-null
-language/statements/for/dstr-let-ary-ptrn-elem-id-init-exhausted
 language/statements/for/dstr-let-ary-ptrn-elem-id-init-fn-name-arrow
 language/statements/for/dstr-let-ary-ptrn-elem-id-init-fn-name-class
 language/statements/for/dstr-let-ary-ptrn-elem-id-init-fn-name-cover
 language/statements/for/dstr-let-ary-ptrn-elem-id-init-fn-name-fn
 language/statements/for/dstr-let-ary-ptrn-elem-id-init-fn-name-gen
-language/statements/for/dstr-let-ary-ptrn-elem-id-init-hole
 language/statements/for/dstr-let-ary-ptrn-elem-id-init-skipped
-language/statements/for/dstr-let-ary-ptrn-elem-id-init-throws
-language/statements/for/dstr-let-ary-ptrn-elem-id-init-undef
-language/statements/for/dstr-let-ary-ptrn-elem-id-init-unresolvable
-language/statements/for/dstr-let-ary-ptrn-elem-id-iter-complete
-language/statements/for/dstr-let-ary-ptrn-elem-id-iter-done
 language/statements/for/dstr-let-ary-ptrn-elem-id-iter-step-err
 language/statements/for/dstr-let-ary-ptrn-elem-id-iter-val
 language/statements/for/dstr-let-ary-ptrn-elem-id-iter-val-err
-language/statements/for/dstr-let-ary-ptrn-elem-obj-id
-language/statements/for/dstr-let-ary-ptrn-elem-obj-id-init
-language/statements/for/dstr-let-ary-ptrn-elem-obj-prop-id
-language/statements/for/dstr-let-ary-ptrn-elem-obj-prop-id-init
-language/statements/for/dstr-let-ary-ptrn-elem-obj-val-null
-language/statements/for/dstr-let-ary-ptrn-elem-obj-val-undef
 language/statements/for/dstr-let-ary-ptrn-elision
 language/statements/for/dstr-let-ary-ptrn-elision-exhausted
 language/statements/for/dstr-let-ary-ptrn-elision-iter-close
@@ -7864,36 +7773,13 @@ language/statements/for/dstr-let-ary-ptrn-rest-id-iter-step-err
 language/statements/for/dstr-let-ary-ptrn-rest-id-iter-val-err
 language/statements/for/dstr-let-ary-ptrn-rest-obj-id
 language/statements/for/dstr-let-ary-ptrn-rest-obj-prop-id
-language/statements/for/dstr-let-obj-init-null
-language/statements/for/dstr-let-obj-init-undefined
-language/statements/for/dstr-let-obj-ptrn-empty
-language/statements/for/dstr-let-obj-ptrn-id-get-value-err
 language/statements/for/dstr-let-obj-ptrn-id-init-fn-name-arrow
 language/statements/for/dstr-let-obj-ptrn-id-init-fn-name-class
 language/statements/for/dstr-let-obj-ptrn-id-init-fn-name-cover
 language/statements/for/dstr-let-obj-ptrn-id-init-fn-name-fn
 language/statements/for/dstr-let-obj-ptrn-id-init-fn-name-gen
-language/statements/for/dstr-let-obj-ptrn-id-init-skipped
-language/statements/for/dstr-let-obj-ptrn-id-init-throws
-language/statements/for/dstr-let-obj-ptrn-id-init-unresolvable
-language/statements/for/dstr-let-obj-ptrn-id-trailing-comma
-language/statements/for/dstr-let-obj-ptrn-list-err
 language/statements/for/dstr-let-obj-ptrn-prop-ary
 language/statements/for/dstr-let-obj-ptrn-prop-ary-init
-language/statements/for/dstr-let-obj-ptrn-prop-ary-trailing-comma
-language/statements/for/dstr-let-obj-ptrn-prop-ary-value-null
-language/statements/for/dstr-let-obj-ptrn-prop-eval-err
-language/statements/for/dstr-let-obj-ptrn-prop-id
-language/statements/for/dstr-let-obj-ptrn-prop-id-get-value-err
-language/statements/for/dstr-let-obj-ptrn-prop-id-init
-language/statements/for/dstr-let-obj-ptrn-prop-id-init-skipped
-language/statements/for/dstr-let-obj-ptrn-prop-id-init-throws
-language/statements/for/dstr-let-obj-ptrn-prop-id-init-unresolvable
-language/statements/for/dstr-let-obj-ptrn-prop-id-trailing-comma
-language/statements/for/dstr-let-obj-ptrn-prop-obj
-language/statements/for/dstr-let-obj-ptrn-prop-obj-init
-language/statements/for/dstr-let-obj-ptrn-prop-obj-value-null
-language/statements/for/dstr-let-obj-ptrn-prop-obj-value-undef
 language/statements/for/dstr-var-ary-init-iter-close
 language/statements/for/dstr-var-ary-init-iter-get-err
 language/statements/for/dstr-var-ary-init-iter-no-close
@@ -7903,32 +7789,17 @@ language/statements/for/dstr-var-ary-ptrn-elem-ary-elem-iter
 language/statements/for/dstr-var-ary-ptrn-elem-ary-elision-init
 language/statements/for/dstr-var-ary-ptrn-elem-ary-elision-iter
 language/statements/for/dstr-var-ary-ptrn-elem-ary-empty-init
-language/statements/for/dstr-var-ary-ptrn-elem-ary-empty-iter
 language/statements/for/dstr-var-ary-ptrn-elem-ary-rest-init
 language/statements/for/dstr-var-ary-ptrn-elem-ary-rest-iter
-language/statements/for/dstr-var-ary-ptrn-elem-ary-val-null
-language/statements/for/dstr-var-ary-ptrn-elem-id-init-exhausted
 language/statements/for/dstr-var-ary-ptrn-elem-id-init-fn-name-arrow
 language/statements/for/dstr-var-ary-ptrn-elem-id-init-fn-name-class
 language/statements/for/dstr-var-ary-ptrn-elem-id-init-fn-name-cover
 language/statements/for/dstr-var-ary-ptrn-elem-id-init-fn-name-fn
 language/statements/for/dstr-var-ary-ptrn-elem-id-init-fn-name-gen
-language/statements/for/dstr-var-ary-ptrn-elem-id-init-hole
 language/statements/for/dstr-var-ary-ptrn-elem-id-init-skipped
-language/statements/for/dstr-var-ary-ptrn-elem-id-init-throws
-language/statements/for/dstr-var-ary-ptrn-elem-id-init-undef
-language/statements/for/dstr-var-ary-ptrn-elem-id-init-unresolvable
-language/statements/for/dstr-var-ary-ptrn-elem-id-iter-complete
-language/statements/for/dstr-var-ary-ptrn-elem-id-iter-done
 language/statements/for/dstr-var-ary-ptrn-elem-id-iter-step-err
 language/statements/for/dstr-var-ary-ptrn-elem-id-iter-val
 language/statements/for/dstr-var-ary-ptrn-elem-id-iter-val-err
-language/statements/for/dstr-var-ary-ptrn-elem-obj-id
-language/statements/for/dstr-var-ary-ptrn-elem-obj-id-init
-language/statements/for/dstr-var-ary-ptrn-elem-obj-prop-id
-language/statements/for/dstr-var-ary-ptrn-elem-obj-prop-id-init
-language/statements/for/dstr-var-ary-ptrn-elem-obj-val-null
-language/statements/for/dstr-var-ary-ptrn-elem-obj-val-undef
 language/statements/for/dstr-var-ary-ptrn-elision
 language/statements/for/dstr-var-ary-ptrn-elision-exhausted
 language/statements/for/dstr-var-ary-ptrn-elision-iter-close
@@ -7947,36 +7818,13 @@ language/statements/for/dstr-var-ary-ptrn-rest-id-iter-step-err
 language/statements/for/dstr-var-ary-ptrn-rest-id-iter-val-err
 language/statements/for/dstr-var-ary-ptrn-rest-obj-id
 language/statements/for/dstr-var-ary-ptrn-rest-obj-prop-id
-language/statements/for/dstr-var-obj-init-null
-language/statements/for/dstr-var-obj-init-undefined
-language/statements/for/dstr-var-obj-ptrn-empty
-language/statements/for/dstr-var-obj-ptrn-id-get-value-err
 language/statements/for/dstr-var-obj-ptrn-id-init-fn-name-arrow
 language/statements/for/dstr-var-obj-ptrn-id-init-fn-name-class
 language/statements/for/dstr-var-obj-ptrn-id-init-fn-name-cover
 language/statements/for/dstr-var-obj-ptrn-id-init-fn-name-fn
 language/statements/for/dstr-var-obj-ptrn-id-init-fn-name-gen
-language/statements/for/dstr-var-obj-ptrn-id-init-skipped
-language/statements/for/dstr-var-obj-ptrn-id-init-throws
-language/statements/for/dstr-var-obj-ptrn-id-init-unresolvable
-language/statements/for/dstr-var-obj-ptrn-id-trailing-comma
-language/statements/for/dstr-var-obj-ptrn-list-err
 language/statements/for/dstr-var-obj-ptrn-prop-ary
 language/statements/for/dstr-var-obj-ptrn-prop-ary-init
-language/statements/for/dstr-var-obj-ptrn-prop-ary-trailing-comma
-language/statements/for/dstr-var-obj-ptrn-prop-ary-value-null
-language/statements/for/dstr-var-obj-ptrn-prop-eval-err
-language/statements/for/dstr-var-obj-ptrn-prop-id
-language/statements/for/dstr-var-obj-ptrn-prop-id-get-value-err
-language/statements/for/dstr-var-obj-ptrn-prop-id-init
-language/statements/for/dstr-var-obj-ptrn-prop-id-init-skipped
-language/statements/for/dstr-var-obj-ptrn-prop-id-init-throws
-language/statements/for/dstr-var-obj-ptrn-prop-id-init-unresolvable
-language/statements/for/dstr-var-obj-ptrn-prop-id-trailing-comma
-language/statements/for/dstr-var-obj-ptrn-prop-obj
-language/statements/for/dstr-var-obj-ptrn-prop-obj-init
-language/statements/for/dstr-var-obj-ptrn-prop-obj-value-null
-language/statements/for/dstr-var-obj-ptrn-prop-obj-value-undef
 language/statements/for/head-let-destructuring
 language/statements/for/head-lhs-let
 language/statements/for-in/head-const-bound-names-fordecl-tdz
@@ -8939,32 +8787,17 @@ language/statements/let/dstr-ary-ptrn-elem-ary-elem-iter
 language/statements/let/dstr-ary-ptrn-elem-ary-elision-init
 language/statements/let/dstr-ary-ptrn-elem-ary-elision-iter
 language/statements/let/dstr-ary-ptrn-elem-ary-empty-init
-language/statements/let/dstr-ary-ptrn-elem-ary-empty-iter
 language/statements/let/dstr-ary-ptrn-elem-ary-rest-init
 language/statements/let/dstr-ary-ptrn-elem-ary-rest-iter
-language/statements/let/dstr-ary-ptrn-elem-ary-val-null
-language/statements/let/dstr-ary-ptrn-elem-id-init-exhausted
 language/statements/let/dstr-ary-ptrn-elem-id-init-fn-name-arrow
 language/statements/let/dstr-ary-ptrn-elem-id-init-fn-name-class
 language/statements/let/dstr-ary-ptrn-elem-id-init-fn-name-cover
 language/statements/let/dstr-ary-ptrn-elem-id-init-fn-name-fn
 language/statements/let/dstr-ary-ptrn-elem-id-init-fn-name-gen
-language/statements/let/dstr-ary-ptrn-elem-id-init-hole
 language/statements/let/dstr-ary-ptrn-elem-id-init-skipped
-language/statements/let/dstr-ary-ptrn-elem-id-init-throws
-language/statements/let/dstr-ary-ptrn-elem-id-init-undef
-language/statements/let/dstr-ary-ptrn-elem-id-init-unresolvable
-language/statements/let/dstr-ary-ptrn-elem-id-iter-complete
-language/statements/let/dstr-ary-ptrn-elem-id-iter-done
 language/statements/let/dstr-ary-ptrn-elem-id-iter-step-err
 language/statements/let/dstr-ary-ptrn-elem-id-iter-val
 language/statements/let/dstr-ary-ptrn-elem-id-iter-val-err
-language/statements/let/dstr-ary-ptrn-elem-obj-id
-language/statements/let/dstr-ary-ptrn-elem-obj-id-init
-language/statements/let/dstr-ary-ptrn-elem-obj-prop-id
-language/statements/let/dstr-ary-ptrn-elem-obj-prop-id-init
-language/statements/let/dstr-ary-ptrn-elem-obj-val-null
-language/statements/let/dstr-ary-ptrn-elem-obj-val-undef
 language/statements/let/dstr-ary-ptrn-elision
 language/statements/let/dstr-ary-ptrn-elision-exhausted
 language/statements/let/dstr-ary-ptrn-elision-step-err
@@ -8981,36 +8814,13 @@ language/statements/let/dstr-ary-ptrn-rest-id-iter-step-err
 language/statements/let/dstr-ary-ptrn-rest-id-iter-val-err
 language/statements/let/dstr-ary-ptrn-rest-obj-id
 language/statements/let/dstr-ary-ptrn-rest-obj-prop-id
-language/statements/let/dstr-obj-init-null
-language/statements/let/dstr-obj-init-undefined
-language/statements/let/dstr-obj-ptrn-empty
-language/statements/let/dstr-obj-ptrn-id-get-value-err
 language/statements/let/dstr-obj-ptrn-id-init-fn-name-arrow
 language/statements/let/dstr-obj-ptrn-id-init-fn-name-class
 language/statements/let/dstr-obj-ptrn-id-init-fn-name-cover
 language/statements/let/dstr-obj-ptrn-id-init-fn-name-fn
 language/statements/let/dstr-obj-ptrn-id-init-fn-name-gen
-language/statements/let/dstr-obj-ptrn-id-init-skipped
-language/statements/let/dstr-obj-ptrn-id-init-throws
-language/statements/let/dstr-obj-ptrn-id-init-unresolvable
-language/statements/let/dstr-obj-ptrn-id-trailing-comma
-language/statements/let/dstr-obj-ptrn-list-err
 language/statements/let/dstr-obj-ptrn-prop-ary
 language/statements/let/dstr-obj-ptrn-prop-ary-init
-language/statements/let/dstr-obj-ptrn-prop-ary-trailing-comma
-language/statements/let/dstr-obj-ptrn-prop-ary-value-null
-language/statements/let/dstr-obj-ptrn-prop-eval-err
-language/statements/let/dstr-obj-ptrn-prop-id
-language/statements/let/dstr-obj-ptrn-prop-id-get-value-err
-language/statements/let/dstr-obj-ptrn-prop-id-init
-language/statements/let/dstr-obj-ptrn-prop-id-init-skipped
-language/statements/let/dstr-obj-ptrn-prop-id-init-throws
-language/statements/let/dstr-obj-ptrn-prop-id-init-unresolvable
-language/statements/let/dstr-obj-ptrn-prop-id-trailing-comma
-language/statements/let/dstr-obj-ptrn-prop-obj
-language/statements/let/dstr-obj-ptrn-prop-obj-init
-language/statements/let/dstr-obj-ptrn-prop-obj-value-null
-language/statements/let/dstr-obj-ptrn-prop-obj-value-undef
 language/statements/let/fn-name-arrow
 language/statements/let/fn-name-class
 language/statements/let/fn-name-cover
@@ -9145,32 +8955,17 @@ language/statements/variable/dstr-ary-ptrn-elem-ary-elem-iter
 language/statements/variable/dstr-ary-ptrn-elem-ary-elision-init
 language/statements/variable/dstr-ary-ptrn-elem-ary-elision-iter
 language/statements/variable/dstr-ary-ptrn-elem-ary-empty-init
-language/statements/variable/dstr-ary-ptrn-elem-ary-empty-iter
 language/statements/variable/dstr-ary-ptrn-elem-ary-rest-init
 language/statements/variable/dstr-ary-ptrn-elem-ary-rest-iter
-language/statements/variable/dstr-ary-ptrn-elem-ary-val-null
-language/statements/variable/dstr-ary-ptrn-elem-id-init-exhausted
 language/statements/variable/dstr-ary-ptrn-elem-id-init-fn-name-arrow
 language/statements/variable/dstr-ary-ptrn-elem-id-init-fn-name-class
 language/statements/variable/dstr-ary-ptrn-elem-id-init-fn-name-cover
 language/statements/variable/dstr-ary-ptrn-elem-id-init-fn-name-fn
 language/statements/variable/dstr-ary-ptrn-elem-id-init-fn-name-gen
-language/statements/variable/dstr-ary-ptrn-elem-id-init-hole
 language/statements/variable/dstr-ary-ptrn-elem-id-init-skipped
-language/statements/variable/dstr-ary-ptrn-elem-id-init-throws
-language/statements/variable/dstr-ary-ptrn-elem-id-init-undef
-language/statements/variable/dstr-ary-ptrn-elem-id-init-unresolvable
-language/statements/variable/dstr-ary-ptrn-elem-id-iter-complete
-language/statements/variable/dstr-ary-ptrn-elem-id-iter-done
 language/statements/variable/dstr-ary-ptrn-elem-id-iter-step-err
 language/statements/variable/dstr-ary-ptrn-elem-id-iter-val
 language/statements/variable/dstr-ary-ptrn-elem-id-iter-val-err
-language/statements/variable/dstr-ary-ptrn-elem-obj-id
-language/statements/variable/dstr-ary-ptrn-elem-obj-id-init
-language/statements/variable/dstr-ary-ptrn-elem-obj-prop-id
-language/statements/variable/dstr-ary-ptrn-elem-obj-prop-id-init
-language/statements/variable/dstr-ary-ptrn-elem-obj-val-null
-language/statements/variable/dstr-ary-ptrn-elem-obj-val-undef
 language/statements/variable/dstr-ary-ptrn-elision
 language/statements/variable/dstr-ary-ptrn-elision-exhausted
 language/statements/variable/dstr-ary-ptrn-elision-step-err
@@ -9187,36 +8982,13 @@ language/statements/variable/dstr-ary-ptrn-rest-id-iter-step-err
 language/statements/variable/dstr-ary-ptrn-rest-id-iter-val-err
 language/statements/variable/dstr-ary-ptrn-rest-obj-id
 language/statements/variable/dstr-ary-ptrn-rest-obj-prop-id
-language/statements/variable/dstr-obj-init-null
-language/statements/variable/dstr-obj-init-undefined
-language/statements/variable/dstr-obj-ptrn-empty
-language/statements/variable/dstr-obj-ptrn-id-get-value-err
 language/statements/variable/dstr-obj-ptrn-id-init-fn-name-arrow
 language/statements/variable/dstr-obj-ptrn-id-init-fn-name-class
 language/statements/variable/dstr-obj-ptrn-id-init-fn-name-cover
 language/statements/variable/dstr-obj-ptrn-id-init-fn-name-fn
 language/statements/variable/dstr-obj-ptrn-id-init-fn-name-gen
-language/statements/variable/dstr-obj-ptrn-id-init-skipped
-language/statements/variable/dstr-obj-ptrn-id-init-throws
-language/statements/variable/dstr-obj-ptrn-id-init-unresolvable
-language/statements/variable/dstr-obj-ptrn-id-trailing-comma
-language/statements/variable/dstr-obj-ptrn-list-err
 language/statements/variable/dstr-obj-ptrn-prop-ary
 language/statements/variable/dstr-obj-ptrn-prop-ary-init
-language/statements/variable/dstr-obj-ptrn-prop-ary-trailing-comma
-language/statements/variable/dstr-obj-ptrn-prop-ary-value-null
-language/statements/variable/dstr-obj-ptrn-prop-eval-err
-language/statements/variable/dstr-obj-ptrn-prop-id
-language/statements/variable/dstr-obj-ptrn-prop-id-get-value-err
-language/statements/variable/dstr-obj-ptrn-prop-id-init
-language/statements/variable/dstr-obj-ptrn-prop-id-init-skipped
-language/statements/variable/dstr-obj-ptrn-prop-id-init-throws
-language/statements/variable/dstr-obj-ptrn-prop-id-init-unresolvable
-language/statements/variable/dstr-obj-ptrn-prop-id-trailing-comma
-language/statements/variable/dstr-obj-ptrn-prop-obj
-language/statements/variable/dstr-obj-ptrn-prop-obj-init
-language/statements/variable/dstr-obj-ptrn-prop-obj-value-null
-language/statements/variable/dstr-obj-ptrn-prop-obj-value-undef
 language/statements/variable/fn-name-arrow
 language/statements/variable/fn-name-class
 language/statements/variable/fn-name-cover
@@ -9262,4 +9034,4 @@ language/global-code/decl-lex-restricted-global
 language/statements/const/global-use-before-initialization-in-declaration-statement
 language/statements/const/global-use-before-initialization-in-prior-statement
 language/statements/let/global-use-before-initialization-in-declaration-statement
-language/statements/let/global-use-before-initialization-in-prior-statement
+language/statements/let/global-use-before-initialization-in-prior-statement
\ No newline at end of file