perf(ivy): move local references into consts array (#33129)

Follow-up from #32798. Moves the local references array into the component def's `consts` in order to make it compress better.

Before:
```
const _c0 = ['foo', ''];

SomeComp.ngComponentDef = defineComponent({
  template: function() {
    element(0, 'div', null, _c0);
  }
});
```

After:
```
SomeComp.ngComponentDef = defineComponent({
  consts: [['foo', '']],
  template: function() {
    element(0, 'div', null, 0);
  }
});
```

PR Close #33129

packages/compiler-cli/test/compliance/r3_compiler_compliance_spec.ts

@@ -796,7 +796,6 @@ describe('compiler compliance', () => {
           `IfDirective.ɵfac = function IfDirective_Factory(t) { return new (t || IfDirective)($r3$.ɵɵdirectiveInject($i$.TemplateRef)); };`;
 
       const MyComponentDefinition = `
-        const $c1$ = ["foo", ""];
         function MyComponent_li_2_Template(rf, ctx) {
           if (rf & 1) {
             $r3$.ɵɵelementStart(0, "li");
@@ -816,15 +815,15 @@ describe('compiler compliance', () => {
           selectors: [["my-component"]],
           decls: 3,
           vars: 0,
-          consts: [[${AttributeMarker.Template}, "if"]],
+          consts: [["foo", ""], [${AttributeMarker.Template}, "if"]],
           template:  function MyComponent_Template(rf, ctx) {
             if (rf & 1) {
-              $r3$.ɵɵelementStart(0, "ul", null, $c1$);
+              $r3$.ɵɵelementStart(0, "ul", null, 0);
-              $r3$.ɵɵtemplate(2, MyComponent_li_2_Template, 2, 2, "li", 0);
+              $r3$.ɵɵtemplate(2, MyComponent_li_2_Template, 2, 2, "li", 1);
               $r3$.ɵɵelementEnd();
             }
           },
-          directives:[IfDirective],
+          directives: [IfDirective],
           encapsulation: 2
         });`;
 
@@ -2231,16 +2230,16 @@ describe('compiler compliance', () => {
       };
 
       const MyComponentDefinition = `
-        const $c1$ = ["user", ""];
         …
         MyComponent.ɵcmp = $r3$.ɵɵdefineComponent({
           type: MyComponent,
           selectors: [["my-component"]],
           decls: 3,
           vars: 1,
+          consts: [["user", ""]],
           template:  function MyComponent_Template(rf, ctx) {
             if (rf & 1) {
-              $r3$.ɵɵelement(0, "input", null, $c1$);
+              $r3$.ɵɵelement(0, "input", null, 0);
               $r3$.ɵɵtext(2);
             }
             if (rf & 2) {
@@ -2292,9 +2291,6 @@ describe('compiler compliance', () => {
       };
 
       const MyComponentDefinition = `
-        const $c1$ = ["foo", ""];
-        const $c3$ = ["baz", ""];
-        const $c4$ = ["bar", ""];
         function MyComponent_div_3_span_2_Template(rf, ctx) {
           if (rf & 1) {
             $r3$.ɵɵelementStart(0, "span");
@@ -2315,8 +2311,8 @@ describe('compiler compliance', () => {
           if (rf & 1) {
             $r3$.ɵɵelementStart(0, "div");
             $r3$.ɵɵtext(1);
-            $r3$.ɵɵtemplate(2, MyComponent_div_3_span_2_Template, 2, 3, "span", 0);
+            $r3$.ɵɵtemplate(2, MyComponent_div_3_span_2_Template, 2, 3, "span", 1);
-            $r3$.ɵɵelement(3, "span", null, $c4$);
+            $r3$.ɵɵelement(3, "span", null, 3);
             $r3$.ɵɵelementEnd();
           }
           if (rf & 2) {
@@ -2333,13 +2329,13 @@ describe('compiler compliance', () => {
           selectors: [["my-component"]],
           decls: 6,
           vars: 1,
-          consts: [[${AttributeMarker.Template}, "if"]],
+          consts: [["foo", ""], [${AttributeMarker.Template}, "if"], ["baz", ""], ["bar", ""]],
           template:  function MyComponent_Template(rf, ctx) {
             if (rf & 1) {
-              $r3$.ɵɵelement(0, "div", null, $c1$);
+              $r3$.ɵɵelement(0, "div", null, 0);
               $r3$.ɵɵtext(2);
-              $r3$.ɵɵtemplate(3, MyComponent_div_3_Template, 5, 2, "div", 0);
+              $r3$.ɵɵtemplate(3, MyComponent_div_3_Template, 5, 2, "div", 1);
-              $r3$.ɵɵelement(4, "div", null, $c3$);
+              $r3$.ɵɵelement(4, "div", null, 2);
             }
             if (rf & 2) {
               const $foo$ = $r3$.ɵɵreference(1);
@@ -2381,8 +2377,6 @@ describe('compiler compliance', () => {
       };
 
       const template = `
-      const $c1$ = ["foo", ""];
-
       function MyComponent_div_0_span_3_Template(rf, ctx) {
         if (rf & 1) {
           $i0$.ɵɵelementStart(0, "span");
@@ -2400,8 +2394,8 @@ describe('compiler compliance', () => {
       function MyComponent_div_0_Template(rf, ctx) {
         if (rf & 1) {
           $i0$.ɵɵelementStart(0, "div");
-          $i0$.ɵɵelement(1, "div", null, $c1$);
+          $i0$.ɵɵelement(1, "div", null, 1);
-          $i0$.ɵɵtemplate(3, MyComponent_div_0_span_3_Template, 2, 2, "span", 1);
+          $i0$.ɵɵtemplate(3, MyComponent_div_0_span_3_Template, 2, 2, "span", 2);
           $i0$.ɵɵelementEnd();
         }
         if (rf & 2) {
@@ -2412,7 +2406,7 @@ describe('compiler compliance', () => {
       }
 
       // ...
-      consts: [[${AttributeMarker.Template}, "ngFor", "ngForOf"], [${AttributeMarker.Template}, "ngIf"]],
+      consts: [[${AttributeMarker.Template}, "ngFor", "ngForOf"], ["foo", ""], [${AttributeMarker.Template}, "ngIf"]],
       template:function MyComponent_Template(rf, ctx){
         if (rf & 1) {
           $i0$.ɵɵtemplate(0, MyComponent_div_0_Template, 4, 1, "div", 0);

packages/compiler-cli/test/compliance/r3_view_compiler_binding_spec.ts

@@ -1251,12 +1251,11 @@ describe('compiler compliance: bindings', () => {
       `);
 
       const template = `
-        const $_c1$ = ["myRef", ""];
         …
-        consts: [["id", "my-id"]],
+        consts: [["id", "my-id"], ["myRef", ""]],
         template:function MyComponent_Template(rf, $ctx$){
           if (rf & 1) {
-            $i0$.ɵɵelementStart(0, "b", 0, $_c1$);
+            $i0$.ɵɵelementStart(0, "b", 0, 1);
             $i0$.ɵɵdisableBindings();
             $i0$.ɵɵelementStart(2, "i");
             $i0$.ɵɵtext(3, "Hello {{ name }}!");

packages/compiler-cli/test/compliance/r3_view_compiler_listener_spec.ts

@@ -193,14 +193,13 @@ describe('compiler compliance: listen()', () => {
     };
 
     const MyComponentDefinition = `
-        const $e2_refs$ = ["user", ""];
         …
         MyComponent.ɵcmp = $r3$.ɵɵdefineComponent({
           type: MyComponent,
           selectors: [["my-component"]],
           decls: 4,
           vars: 0,
-          consts: [[${AttributeMarker.Bindings}, "click"]],
+          consts: [[${AttributeMarker.Bindings}, "click"], ["user", ""]],
           template:  function MyComponent_Template(rf, ctx) {
             if (rf & 1) {
               const $s$ = $r3$.ɵɵgetCurrentView();
@@ -212,7 +211,7 @@ describe('compiler compliance: listen()', () => {
                 });
                 $r3$.ɵɵtext(1, "Save");
               $r3$.ɵɵelementEnd();
-              $r3$.ɵɵelement(2, "input", null, $e2_refs$);
+              $r3$.ɵɵelement(2, "input", null, 1);
             }
           },
           encapsulation: 2

packages/compiler-cli/test/compliance/r3_view_compiler_template_spec.ts

@@ -491,8 +491,6 @@ describe('compiler compliance: template', () => {
     };
 
     const template = `
-      const $t0_refs$ = ["foo", ""];
-
       function MyComponent_ng_template_0_Template(rf, ctx) {
         if (rf & 1) {
           $i0$.ɵɵtext(0, "some-content");
@@ -500,10 +498,10 @@ describe('compiler compliance: template', () => {
       }
 
       // ...
-
+      consts: [["foo", ""]],
       template: function MyComponent_Template(rf, ctx) {
         if (rf & 1) {
-          $i0$.ɵɵtemplate(0, MyComponent_ng_template_0_Template, 1, 0, "ng-template", null, $t0_refs$, $i0$.ɵɵtemplateRefExtractor);
+          $i0$.ɵɵtemplate(0, MyComponent_ng_template_0_Template, 1, 0, "ng-template", null, 0, $i0$.ɵɵtemplateRefExtractor);
         }
       }`;
 

packages/compiler/src/render3/view/template.ts

@@ -606,10 +606,11 @@ export class TemplateDefinitionBuilder implements t.Visitor<void>, LocalResolver
     // add attributes for directive and projection matching purposes
     attributes.push(...this.prepareNonRenderAttrs(
         allOtherInputs, element.outputs, stylingBuilder, [], i18nAttrs, ngProjectAsAttr));
-    parameters.push(this.addConstants(attributes));
+    parameters.push(this.addAttrsToConsts(attributes));
 
     // local refs (ex.: <div #foo #bar="baz">)
-    parameters.push(this.prepareRefsParameter(element.references));
+    const refs = this.prepareRefsArray(element.references);
+    parameters.push(this.addToConsts(refs));
 
     const wasInNamespace = this._namespace;
     const currentNamespace = this.getNamespaceInstruction(namespaceKey);
@@ -869,11 +870,12 @@ export class TemplateDefinitionBuilder implements t.Visitor<void>, LocalResolver
         (a: t.TextAttribute) => { attrsExprs.push(asLiteral(a.name), asLiteral(a.value)); });
     attrsExprs.push(...this.prepareNonRenderAttrs(
         template.inputs, template.outputs, undefined, template.templateAttrs));
-    parameters.push(this.addConstants(attrsExprs));
+    parameters.push(this.addAttrsToConsts(attrsExprs));
 
     // local refs (ex.: <ng-template #foo>)
     if (template.references && template.references.length) {
-      parameters.push(this.prepareRefsParameter(template.references));
+      const refs = this.prepareRefsArray(template.references);
+      parameters.push(this.addToConsts(refs));
       parameters.push(o.importExpr(R3.templateRefExtractor));
     }
 
@@ -1294,24 +1296,26 @@ export class TemplateDefinitionBuilder implements t.Visitor<void>, LocalResolver
     return attrExprs;
   }
 
-  private addConstants(constExprs: o.Expression[]): o.LiteralExpr {
+  private addToConsts(expression: o.Expression): o.LiteralExpr {
-    if (constExprs.length > 0) {
+    if (o.isNull(expression)) {
-      const literal = o.literalArr(constExprs);
+      return o.TYPED_NULL_EXPR;
+    }
 
     // Try to reuse a literal that's already in the array, if possible.
     for (let i = 0; i < this._constants.length; i++) {
-        if (this._constants[i].isEquivalent(literal)) {
+      if (this._constants[i].isEquivalent(expression)) {
         return o.literal(i);
       }
     }
 
-      return o.literal(this._constants.push(literal) - 1);
+    return o.literal(this._constants.push(expression) - 1);
   }
 
-    return o.TYPED_NULL_EXPR;
+  private addAttrsToConsts(attrs: o.Expression[]): o.LiteralExpr {
+    return attrs.length > 0 ? this.addToConsts(o.literalArr(attrs)) : o.TYPED_NULL_EXPR;
   }
 
-  private prepareRefsParameter(references: t.Reference[]): o.Expression {
+  private prepareRefsArray(references: t.Reference[]): o.Expression {
     if (!references || references.length === 0) {
       return o.TYPED_NULL_EXPR;
     }
@@ -1336,7 +1340,7 @@ export class TemplateDefinitionBuilder implements t.Visitor<void>, LocalResolver
       return [reference.name, reference.value];
     }));
 
-    return this.constantPool.getConstLiteral(asLiteral(refsParam), true);
+    return asLiteral(refsParam);
   }
 
   private prepareListenerParameter(tagName: string, outputAst: t.BoundEvent, index: number):

packages/core/src/render3/definition.ts

@@ -18,7 +18,7 @@ import {stringify} from '../util/stringify';
 import {EMPTY_ARRAY, EMPTY_OBJ} from './empty';
 import {NG_COMP_DEF, NG_DIR_DEF, NG_FACTORY_DEF, NG_LOC_ID_DEF, NG_MOD_DEF, NG_PIPE_DEF} from './fields';
 import {ComponentDef, ComponentDefFeature, ComponentTemplate, ComponentType, ContentQueriesFunction, DirectiveDef, DirectiveDefFeature, DirectiveTypesOrFactory, FactoryFn, HostBindingsFunction, PipeDef, PipeType, PipeTypesOrFactory, ViewQueriesFunction} from './interfaces/definition';
-import {TAttributes} from './interfaces/node';
+import {TConstants} from './interfaces/node';
 // while SelectorFlags is unused here, it's required so that types don't get resolved lazily
 // see: https://github.com/Microsoft/web-build-tools/issues/1050
 import {CssSelectorList, SelectorFlags} from './interfaces/projection';
@@ -172,8 +172,11 @@ export function ɵɵdefineComponent<T>(componentDefinition: {
    */
   template: ComponentTemplate<T>;
 
-  /** Constants for the nodes in the component's view. */
+  /**
-  consts?: TAttributes[];
+   * Constants for the nodes in the component's view.
+   * Includes attribute arrays, local definition arrays etc.
+   */
+  consts?: TConstants;
 
   /**
    * An array of `ngContent[selector]` values that were found in the template.

packages/core/src/render3/instructions/container.ts

@@ -17,7 +17,7 @@ import {FLAGS, HEADER_OFFSET, InitPhaseState, LView, LViewFlags, RENDERER, TVIEW
 import {assertNodeType} from '../node_assert';
 import {appendChild, removeView} from '../node_manipulation';
 import {getBindingIndex, getCheckNoChangesMode, getIsParent, getLView, getPreviousOrParentTNode, setIsNotParent, setPreviousOrParentTNode} from '../state';
-import {load} from '../util/view_utils';
+import {getConstant, load} from '../util/view_utils';
 
 import {addToViewTree, createDirectivesInstances, createLContainer, createTNode, createTView, getOrCreateTNode, resolveDirectives, saveResolvedLocalsInData} from './shared';
 
@@ -56,8 +56,8 @@ export function ɵɵcontainer(index: number): void {
  * @param decls The number of nodes, local refs, and pipes for this template
  * @param vars The number of bindings for this template
  * @param tagName The name of the container element, if applicable
- * @param constsIndex Index of template in the `consts` array.
+ * @param attrsIndex Index of template attributes in the `consts` array.
- * @param localRefs A set of local reference bindings on the element.
+ * @param localRefs Index of the local references in the `consts` array.
  * @param localRefExtractor A function which extracts local-refs values from the template.
  *        Defaults to the current element associated with the local-ref.
  *
@@ -65,7 +65,7 @@ export function ɵɵcontainer(index: number): void {
  */
 export function ɵɵtemplate(
     index: number, templateFn: ComponentTemplate<any>| null, decls: number, vars: number,
-    tagName?: string | null, constsIndex?: number | null, localRefs?: string[] | null,
+    tagName?: string | null, attrsIndex?: number | null, localRefsIndex?: number | null,
     localRefExtractor?: LocalRefExtractor) {
   const lView = getLView();
   const tView = lView[TVIEW];
@@ -73,11 +73,11 @@ export function ɵɵtemplate(
 
   // TODO: consider a separate node type for templates
   const tContainerNode = containerInternal(
-      lView, index, tagName || null,
+      lView, index, tagName || null, getConstant(tViewConsts, attrsIndex) as TAttributes);
-      tViewConsts === null || constsIndex == null ? null : tViewConsts[constsIndex]);
+  const localRefs = getConstant(tViewConsts, localRefsIndex) as string[];
   if (tView.firstTemplatePass) {
     ngDevMode && ngDevMode.firstTemplatePass++;
-    resolveDirectives(tView, lView, tContainerNode, localRefs || null);
+    resolveDirectives(tView, lView, tContainerNode, localRefs);
     registerPostOrderHooks(tView, tContainerNode);
 
     const embeddedTView = tContainerNode.tViews = createTView(

packages/core/src/render3/instructions/element.ts

@@ -20,7 +20,7 @@ import {appendChild} from '../node_manipulation';
 import {decreaseElementDepthCount, getBindingIndex, getElementDepthCount, getIsParent, getLView, getNamespace, getPreviousOrParentTNode, getSelectedIndex, increaseElementDepthCount, setIsNotParent, setPreviousOrParentTNode} from '../state';
 import {setUpAttributes} from '../util/attrs_utils';
 import {getInitialStylingValue, hasClassInput, hasStyleInput, selectClassBasedInputName} from '../util/styling_utils';
-import {getNativeByTNode, getTNode} from '../util/view_utils';
+import {getConstant, getNativeByTNode, getTNode} from '../util/view_utils';
 
 import {createDirectivesInstances, elementCreate, executeContentQueries, getOrCreateTNode, matchingSchemas, renderInitialStyling, resolveDirectives, saveResolvedLocalsInData, setInputsForProperty} from './shared';
 import {registerInitialStylingOnTNode} from './styling';
@@ -32,8 +32,8 @@ import {registerInitialStylingOnTNode} from './styling';
  *
  * @param index Index of the element in the LView array
  * @param name Name of the DOM Node
- * @param constsIndex Index of the element in the `consts` array.
+ * @param attrsIndex Index of the element's attributes in the `consts` array.
- * @param localRefs A set of local reference bindings on the element.
+ * @param localRefsIndex Index of the element's local references in the `consts` array.
  *
  * Attributes and localRefs are passed as an array of strings where elements with an even index
  * hold an attribute name and elements with an odd index hold an attribute value, ex.:
@@ -42,25 +42,25 @@ import {registerInitialStylingOnTNode} from './styling';
  * @codeGenApi
  */
 export function ɵɵelementStart(
-    index: number, name: string, constsIndex?: number | null, localRefs?: string[] | null): void {
+    index: number, name: string, attrsIndex?: number | null, localRefsIndex?: number): void {
   const lView = getLView();
   const tView = lView[TVIEW];
   const tViewConsts = tView.consts;
-  const consts = tViewConsts === null || constsIndex == null ? null : tViewConsts[constsIndex];
+  const attrs = getConstant(tViewConsts, attrsIndex) as TAttributes;
+  const localRefs = getConstant(tViewConsts, localRefsIndex) as string[];
   ngDevMode && assertEqual(
                    getBindingIndex(), tView.bindingStartIndex,
                    'elements should be created before any bindings');
-
   ngDevMode && ngDevMode.rendererCreateElement++;
   ngDevMode && assertDataInRange(lView, index + HEADER_OFFSET);
   const renderer = lView[RENDERER];
   const native = lView[index + HEADER_OFFSET] = elementCreate(name, renderer, getNamespace());
-  const tNode = getOrCreateTNode(tView, lView[T_HOST], index, TNodeType.Element, name, consts);
+  const tNode = getOrCreateTNode(tView, lView[T_HOST], index, TNodeType.Element, name, attrs);
 
-  if (consts != null) {
+  if (attrs != null) {
-    const lastAttrIndex = setUpAttributes(renderer, native, consts);
+    const lastAttrIndex = setUpAttributes(renderer, native, attrs);
     if (tView.firstTemplatePass) {
-      registerInitialStylingOnTNode(tNode, consts, lastAttrIndex);
+      registerInitialStylingOnTNode(tNode, attrs, lastAttrIndex);
     }
   }
 
@@ -84,7 +84,7 @@ export function ɵɵelementStart(
   // and `[class]` bindings work for multiple directives.)
   if (tView.firstTemplatePass) {
     ngDevMode && ngDevMode.firstTemplatePass++;
-    const hasDirectives = resolveDirectives(tView, lView, tNode, localRefs || null);
+    const hasDirectives = resolveDirectives(tView, lView, tNode, localRefs);
     ngDevMode && validateElement(lView, native, tNode, hasDirectives);
 
     if (tView.queries !== null) {
@@ -148,14 +148,14 @@ export function ɵɵelementEnd(): void {
  *
  * @param index Index of the element in the data array
  * @param name Name of the DOM Node
- * @param constsIndex Index of the element in the `consts` array.
+ * @param attrsIndex Index of the element's attributes in the `consts` array.
- * @param localRefs A set of local reference bindings on the element.
+ * @param localRefsIndex Index of the element's local references in the `consts` array.
  *
  * @codeGenApi
  */
 export function ɵɵelement(
-    index: number, name: string, constsIndex?: number | null, localRefs?: string[] | null): void {
+    index: number, name: string, attrsIndex?: number | null, localRefsIndex?: number): void {
-  ɵɵelementStart(index, name, constsIndex, localRefs);
+  ɵɵelementStart(index, name, attrsIndex, localRefsIndex);
   ɵɵelementEnd();
 }
 

packages/core/src/render3/instructions/element_container.ts

@@ -15,6 +15,7 @@ import {HEADER_OFFSET, RENDERER, TVIEW, T_HOST} from '../interfaces/view';
 import {assertNodeType} from '../node_assert';
 import {appendChild} from '../node_manipulation';
 import {getBindingIndex, getIsParent, getLView, getPreviousOrParentTNode, setIsNotParent, setPreviousOrParentTNode} from '../state';
+import {getConstant} from '../util/view_utils';
 
 import {createDirectivesInstances, executeContentQueries, getOrCreateTNode, resolveDirectives, saveResolvedLocalsInData} from './shared';
 import {registerInitialStylingOnTNode} from './styling';
@@ -26,8 +27,8 @@ import {registerInitialStylingOnTNode} from './styling';
  * The instruction must later be followed by `elementContainerEnd()` call.
  *
  * @param index Index of the element in the LView array
- * @param constsIndex Index of the container in the `consts` array.
+ * @param attrsIndex Index of the container attributes in the `consts` array.
- * @param localRefs A set of local reference bindings on the element.
+ * @param localRefsIndex Index of the container's local references in the `consts` array.
  *
  * Even if this instruction accepts a set of attributes no actual attribute values are propagated to
  * the DOM (as a comment node can't have attributes). Attributes are here only for directive
@@ -36,13 +37,14 @@ import {registerInitialStylingOnTNode} from './styling';
  * @codeGenApi
  */
 export function ɵɵelementContainerStart(
-    index: number, constsIndex?: number | null, localRefs?: string[] | null): void {
+    index: number, attrsIndex?: number | null, localRefsIndex?: number): void {
   const lView = getLView();
   const tView = lView[TVIEW];
   const renderer = lView[RENDERER];
   const tagName = 'ng-container';
   const tViewConsts = tView.consts;
-  const consts = tViewConsts === null || constsIndex == null ? null : tViewConsts[constsIndex];
+  const attrs = getConstant(tViewConsts, attrsIndex) as TAttributes;
+  const localRefs = getConstant(tViewConsts, localRefsIndex) as string[];
   ngDevMode && assertEqual(
                    getBindingIndex(), tView.bindingStartIndex,
                    'element containers should be created before any bindings');
@@ -53,12 +55,12 @@ export function ɵɵelementContainerStart(
 
   ngDevMode && assertDataInRange(lView, index - 1);
   const tNode =
-      getOrCreateTNode(tView, lView[T_HOST], index, TNodeType.ElementContainer, tagName, consts);
+      getOrCreateTNode(tView, lView[T_HOST], index, TNodeType.ElementContainer, tagName, attrs);
 
-  if (consts && tView.firstTemplatePass) {
+  if (attrs && tView.firstTemplatePass) {
     // While ng-container doesn't necessarily support styling, we use the style context to identify
     // and execute directives on the ng-container.
-    registerInitialStylingOnTNode(tNode, consts as TAttributes, 0);
+    registerInitialStylingOnTNode(tNode, attrs, 0);
   }
 
   appendChild(native, tNode, lView);
@@ -66,7 +68,7 @@ export function ɵɵelementContainerStart(
 
   if (tView.firstTemplatePass) {
     ngDevMode && ngDevMode.firstTemplatePass++;
-    resolveDirectives(tView, lView, tNode, localRefs || null);
+    resolveDirectives(tView, lView, tNode, localRefs);
     if (tView.queries) {
       tView.queries.elementStart(tView, tNode);
     }
@@ -114,13 +116,13 @@ export function ɵɵelementContainerEnd(): void {
  * and {@link elementContainerEnd}
  *
  * @param index Index of the element in the LView array
- * @param constsIndex Index of the container in the `consts` array.
+ * @param attrsIndex Index of the container attributes in the `consts` array.
- * @param localRefs A set of local reference bindings on the element.
+ * @param localRefsIndex Index of the container's local references in the `consts` array.
  *
  * @codeGenApi
  */
 export function ɵɵelementContainer(
-    index: number, constsIndex?: number | null, localRefs?: string[] | null): void {
+    index: number, attrsIndex?: number | null, localRefsIndex?: number): void {
-  ɵɵelementContainerStart(index, constsIndex, localRefs);
+  ɵɵelementContainerStart(index, attrsIndex, localRefsIndex);
   ɵɵelementContainerEnd();
 }

packages/core/src/render3/instructions/lview_debug.ts

@@ -14,7 +14,7 @@ import {initNgDevMode} from '../../util/ng_dev_mode';
 import {ACTIVE_INDEX, CONTAINER_HEADER_OFFSET, LContainer, MOVED_VIEWS, NATIVE} from '../interfaces/container';
 import {DirectiveDefList, PipeDefList, ViewQueriesFunction} from '../interfaces/definition';
 import {COMMENT_MARKER, ELEMENT_MARKER, I18nMutateOpCode, I18nMutateOpCodes, I18nUpdateOpCode, I18nUpdateOpCodes, TIcu} from '../interfaces/i18n';
-import {PropertyAliases, TAttributes, TContainerNode, TElementNode, TNode as ITNode, TNode, TNodeFlags, TNodeProviderIndexes, TNodeType, TViewNode} from '../interfaces/node';
+import {PropertyAliases, TConstants, TContainerNode, TElementNode, TNode as ITNode, TNode, TNodeFlags, TNodeProviderIndexes, TNodeType, TViewNode} from '../interfaces/node';
 import {SelectorFlags} from '../interfaces/projection';
 import {TQueries} from '../interfaces/query';
 import {RComment, RElement, RNode} from '../interfaces/renderer';
@@ -102,7 +102,7 @@ export const TViewConstructor = class TView implements ITView {
       public pipeRegistry: PipeDefList|null,                 //
       public firstChild: TNode|null,                         //
       public schemas: SchemaMetadata[]|null,                 //
-      public consts: TAttributes[]|null,                     //
+      public consts: TConstants|null,                        //
       ) {}
 
   get template_(): string {

packages/core/src/render3/instructions/shared.ts

@@ -23,7 +23,7 @@ import {executeCheckHooks, executeInitAndCheckHooks, incrementInitPhaseFlags, re
 import {ACTIVE_INDEX, CONTAINER_HEADER_OFFSET, LContainer} from '../interfaces/container';
 import {ComponentDef, ComponentTemplate, DirectiveDef, DirectiveDefListOrFactory, PipeDefListOrFactory, RenderFlags, ViewQueriesFunction} from '../interfaces/definition';
 import {INJECTOR_BLOOM_PARENT_SIZE, NodeInjectorFactory} from '../interfaces/injector';
-import {AttributeMarker, InitialInputData, InitialInputs, LocalRefExtractor, PropertyAliasValue, PropertyAliases, TAttributes, TContainerNode, TDirectiveHostNode, TElementContainerNode, TElementNode, TIcuContainerNode, TNode, TNodeFlags, TNodeProviderIndexes, TNodeType, TProjectionNode, TViewNode} from '../interfaces/node';
+import {AttributeMarker, InitialInputData, InitialInputs, LocalRefExtractor, PropertyAliasValue, PropertyAliases, TAttributes, TConstants, TContainerNode, TDirectiveHostNode, TElementContainerNode, TElementNode, TIcuContainerNode, TNode, TNodeFlags, TNodeProviderIndexes, TNodeType, TProjectionNode, TViewNode} from '../interfaces/node';
 import {RComment, RElement, RNode, RText, Renderer3, RendererFactory3, isProceduralRenderer} from '../interfaces/renderer';
 import {SanitizerFn} from '../interfaces/sanitization';
 import {isComponentDef, isComponentHost, isContentQueryHost, isLContainer, isRootView} from '../interfaces/type_checks';
@@ -588,7 +588,7 @@ export function createTView(
     viewIndex: number, templateFn: ComponentTemplate<any>| null, decls: number, vars: number,
     directives: DirectiveDefListOrFactory | null, pipes: PipeDefListOrFactory | null,
     viewQuery: ViewQueriesFunction<any>| null, schemas: SchemaMetadata[] | null,
-    consts: TAttributes[] | null): TView {
+    consts: TConstants | null): TView {
   ngDevMode && ngDevMode.tView++;
   const bindingStartIndex = HEADER_OFFSET + decls;
   // This length does not yet contain host bindings from child directives because at this point,
@@ -627,7 +627,7 @@ export function createTView(
              typeof pipes === 'function' ? pipes() : pipes,  // pipeRegistry: PipeDefList|null,
              null,                                           // firstChild: TNode|null,
              schemas,                                        // schemas: SchemaMetadata[]|null,
-             consts) :                                       // consts: TAttributes[]
+             consts) :                                       // consts: TConstants|null
       {
         id: viewIndex,
         blueprint: blueprint,
@@ -1048,7 +1048,7 @@ export function resolveDirectives(
   if (!getBindingsEnabled()) return false;
 
   const directives: DirectiveDef<any>[]|null = findDirectiveMatches(tView, lView, tNode);
-  const exportsMap: ({[key: string]: number} | null) = localRefs ? {'': -1} : null;
+  const exportsMap: ({[key: string]: number} | null) = localRefs === null ? null : {'': -1};
   let hasDirectives = false;
 
   if (directives !== null) {

packages/core/src/render3/interfaces/definition.ts

@@ -10,7 +10,7 @@ import {SchemaMetadata, ViewEncapsulation} from '../../core';
 import {ProcessProvidersFunction} from '../../di/interface/provider';
 import {Type} from '../../interface/type';
 
-import {TAttributes} from './node';
+import {TConstants} from './node';
 import {CssSelectorList} from './projection';
 import {TView} from './view';
 
@@ -227,7 +227,7 @@ export interface ComponentDef<T> extends DirectiveDef<T> {
   readonly template: ComponentTemplate<T>;
 
   /** Constants associated with the component's view. */
-  readonly consts: TAttributes[]|null;
+  readonly consts: TConstants|null;
 
   /**
    * An array of `ngContent[selector]` values that were found in the template.

packages/core/src/render3/interfaces/node.ts

@@ -224,6 +224,13 @@ export const enum AttributeMarker {
  */
 export type TAttributes = (string | AttributeMarker | CssSelector)[];
 
+/**
+ * Constants that are associated with a view. Includes:
+ * - Attribute arrays.
+ * - Local definition arrays.
+ */
+export type TConstants = (TAttributes | string)[];
+
 /**
  * Binding data (flyweight) for a particular node that is shared between all templates
  * of a specific type.

packages/core/src/render3/interfaces/view.ts

@@ -15,7 +15,7 @@ import {Sanitizer} from '../../sanitization/sanitizer';
 import {LContainer} from './container';
 import {ComponentDef, ComponentTemplate, DirectiveDef, DirectiveDefList, HostBindingsFunction, PipeDef, PipeDefList, ViewQueriesFunction} from './definition';
 import {I18nUpdateOpCodes, TI18n} from './i18n';
-import {TAttributes, TElementNode, TNode, TViewNode} from './node';
+import {TAttributes, TConstants, TElementNode, TNode, TViewNode} from './node';
 import {PlayerHandler} from './player';
 import {LQueries, TQueries} from './query';
 import {RElement, Renderer3, RendererFactory3} from './renderer';
@@ -555,10 +555,10 @@ export interface TView {
   schemas: SchemaMetadata[]|null;
 
   /**
-   * Array of attributes for all of the elements in the view. Used
+   * Array of constants for the view. Includes attribute arrays, local definition arrays etc.
-   * for directive matching and attribute bindings.
+   * Used for directive matching, attribute bindings, local definitions and more.
    */
-  consts: TAttributes[]|null;
+  consts: TConstants|null;
 }
 
 export const enum RootContextFlags {Empty = 0b00, DetectChanges = 0b01, FlushPlayers = 0b10}

packages/core/src/render3/util/view_utils.ts

@@ -10,7 +10,7 @@ import {assertDataInRange, assertDefined, assertDomNode, assertGreaterThan, asse
 import {assertTNodeForLView} from '../assert';
 import {LContainer, TYPE} from '../interfaces/container';
 import {LContext, MONKEY_PATCH_KEY_NAME} from '../interfaces/context';
-import {TNode} from '../interfaces/node';
+import {TConstants, TNode} from '../interfaces/node';
 import {RNode, isProceduralRenderer} from '../interfaces/renderer';
 import {isLContainer, isLView} from '../interfaces/type_checks';
 import {FLAGS, HEADER_OFFSET, HOST, LView, LViewFlags, PARENT, PREORDER_HOOK_FLAGS, RENDERER, TData, TVIEW} from '../interfaces/view';
@@ -175,6 +175,11 @@ export function viewAttachedToContainer(view: LView): boolean {
   return isLContainer(view[PARENT]);
 }
 
+/** Returns a constant from `TConstants` instance. */
+export function getConstant(consts: TConstants | null, index: number | null | undefined) {
+  return consts === null || index == null ? null : consts[index];
+}
+
 /**
  * Resets the pre-order hook flags of the view.
  * @param lView the LView on which the flags are reset

packages/core/test/bundling/cyclic_import/bundle.golden_symbols.json

@@ -296,6 +296,9 @@
   {
     "name": "getComponentLViewByIndex"
   },
+  {
+    "name": "getConstant"
+  },
   {
     "name": "getContainerRenderParent"
   },

packages/core/test/bundling/todo/bundle.golden_symbols.json

@@ -314,12 +314,6 @@
   {
     "name": "_activeStylingMapApplyFn"
   },
-  {
-    "name": "_c0"
-  },
-  {
-    "name": "_c1"
-  },
   {
     "name": "_currentInjector"
   },
@@ -641,6 +635,9 @@
   {
     "name": "getConfig"
   },
+  {
+    "name": "getConstant"
+  },
   {
     "name": "getContainerRenderParent"
   },

packages/core/test/render3/listeners_spec.ts

@@ -917,10 +917,11 @@ describe('event listeners', () => {
         selectors: [['app']],
         decls: 3,
         vars: 0,
+        consts: [['comp', '']],
         template: (rf: RenderFlags, ctx: App) => {
           if (rf & RenderFlags.Create) {
             const state = ɵɵgetCurrentView();
-            ɵɵelement(0, 'comp', null, ['comp', '']);
+            ɵɵelement(0, 'comp', null, 0);
             ɵɵelementStart(2, 'button');
             {
               ɵɵlistener('click', function() {

packages/core/test/render3/query_spec.ts

@@ -341,7 +341,7 @@ describe('query', () => {
             'cmpt',
             function(rf: RenderFlags, ctx: any) {
               if (rf & RenderFlags.Create) {
-                ɵɵelement(0, 'div', null, ['foo', '']);
+                ɵɵelement(0, 'div', null, 0);
                 elToQuery = getNativeByIndex(0, getLView());
                 ɵɵelement(2, 'div');
               }
@@ -356,7 +356,8 @@ describe('query', () => {
                 ɵɵqueryRefresh(tmp = ɵɵloadQuery<QueryList<any>>()) &&
                     (ctx.query = tmp as QueryList<any>);
               }
-            });
+            },
+            [], [], undefined, [['foo', '']]);
 
         const cmptInstance = renderComponent(Cmpt);
         const qList = (cmptInstance.query as QueryList<any>);
@@ -379,7 +380,7 @@ describe('query', () => {
             'cmpt',
             function(rf: RenderFlags, ctx: any) {
               if (rf & RenderFlags.Create) {
-                ɵɵelement(0, 'div', null, ['foo', '', 'bar', '']);
+                ɵɵelement(0, 'div', null, 0);
                 elToQuery = getNativeByIndex(0, getLView());
                 ɵɵelement(3, 'div');
               }
@@ -397,7 +398,8 @@ describe('query', () => {
                 ɵɵqueryRefresh(tmp = ɵɵloadQuery<QueryList<any>>()) &&
                     (ctx.barQuery = tmp as QueryList<any>);
               }
-            });
+            },
+            [], [], undefined, [['foo', '', 'bar', '']]);
 
         const cmptInstance = renderComponent(Cmpt);
 
@@ -426,10 +428,10 @@ describe('query', () => {
             'cmpt',
             function(rf: RenderFlags, ctx: any) {
               if (rf & RenderFlags.Create) {
-                ɵɵelement(0, 'div', null, ['foo', '']);
+                ɵɵelement(0, 'div', null, 0);
                 el1ToQuery = getNativeByIndex(0, getLView());
                 ɵɵelement(2, 'div');
-                ɵɵelement(3, 'div', null, ['bar', '']);
+                ɵɵelement(3, 'div', null, 1);
                 el2ToQuery = getNativeByIndex(3, getLView());
               }
             },
@@ -443,7 +445,8 @@ describe('query', () => {
                 ɵɵqueryRefresh(tmp = ɵɵloadQuery<QueryList<any>>()) &&
                     (ctx.query = tmp as QueryList<any>);
               }
-            });
+            },
+            [], [], undefined, [['foo', ''], ['bar', '']]);
 
         const cmptInstance = renderComponent(Cmpt);
         const qList = (cmptInstance.query as QueryList<any>);
@@ -466,7 +469,7 @@ describe('query', () => {
             'cmpt',
             function(rf: RenderFlags, ctx: any) {
               if (rf & RenderFlags.Create) {
-                ɵɵelement(0, 'div', null, ['foo', '']);
+                ɵɵelement(0, 'div', null, 0);
                 elToQuery = getNativeByIndex(0, getLView());
                 ɵɵelement(2, 'div');
               }
@@ -481,7 +484,8 @@ describe('query', () => {
                 ɵɵqueryRefresh(tmp = ɵɵloadQuery<QueryList<any>>()) &&
                     (ctx.query = tmp as QueryList<any>);
               }
-            });
+            },
+            [], [], undefined, [['foo', '']]);
 
         const cmptInstance = renderComponent(Cmpt);
         const qList = (cmptInstance.query as QueryList<any>);
@@ -503,7 +507,7 @@ describe('query', () => {
                'cmpt',
                function(rf: RenderFlags, ctx: any) {
                  if (rf & RenderFlags.Create) {
-                   ɵɵelementContainerStart(0, null, ['foo', '']);
+                   ɵɵelementContainerStart(0, null, 0);
                    elToQuery = getNativeByIndex(0, getLView());
                    ɵɵelementContainerEnd();
                  }
@@ -518,7 +522,8 @@ describe('query', () => {
                    ɵɵqueryRefresh(tmp = ɵɵloadQuery<QueryList<any>>()) &&
                        (ctx.query = tmp as QueryList<any>);
                  }
-               });
+               },
+               [], [], undefined, [['foo', '']]);
 
            const cmptInstance = renderComponent(Cmpt);
            const qList = (cmptInstance.query as QueryList<any>);
@@ -539,7 +544,7 @@ describe('query', () => {
             'cmpt',
             function(rf: RenderFlags, ctx: any) {
               if (rf & RenderFlags.Create) {
-                ɵɵelementContainerStart(0, null, ['foo', '']);
+                ɵɵelementContainerStart(0, null, 0);
                 elToQuery = getNativeByIndex(0, getLView());
                 ɵɵelementContainerEnd();
               }
@@ -554,7 +559,8 @@ describe('query', () => {
                 ɵɵqueryRefresh(tmp = ɵɵloadQuery<QueryList<any>>()) &&
                     (ctx.query = tmp as QueryList<any>);
               }
-            });
+            },
+            [], [], undefined, [['foo', '']]);
 
         const cmptInstance = renderComponent(Cmpt);
         const qList = (cmptInstance.query as QueryList<any>);
@@ -603,7 +609,7 @@ describe('query', () => {
               if (rf & RenderFlags.Create) {
                 ɵɵelementContainerStart(0);
                 {
-                  ɵɵelement(1, 'div', null, ['foo', '']);
+                  ɵɵelement(1, 'div', null, 0);
                   elToQuery = getNativeByIndex(3, getLView());
                 }
                 ɵɵelementContainerEnd();
@@ -622,7 +628,8 @@ describe('query', () => {
                 ɵɵqueryRefresh(tmp = ɵɵloadQuery<QueryList<any>>()) &&
                     (ctx.shallow = tmp as QueryList<any>);
               }
-            });
+            },
+            [], [], undefined, [['foo', '']]);
 
         const fixture = new ComponentFixture(Cmpt);
         const deepQList = fixture.component.deep;
@@ -642,7 +649,7 @@ describe('query', () => {
             'cmpt',
             function(rf: RenderFlags, ctx: any) {
               if (rf & RenderFlags.Create) {
-                ɵɵelement(0, 'div', null, ['foo', '']);
+                ɵɵelement(0, 'div', null, 0);
               }
             },
             2, 0, [], [],
@@ -655,7 +662,8 @@ describe('query', () => {
                 ɵɵqueryRefresh(tmp = ɵɵloadQuery<QueryList<any>>()) &&
                     (ctx.query = tmp as QueryList<any>);
               }
-            });
+            },
+            [], [], undefined, [['foo', '']]);
 
         const cmptInstance = renderComponent(Cmpt);
         const qList = (cmptInstance.query as QueryList<any>);
@@ -674,7 +682,7 @@ describe('query', () => {
             'cmpt',
             function(rf: RenderFlags, ctx: any) {
               if (rf & RenderFlags.Create) {
-                ɵɵtemplate(0, null, 0, 0, 'ng-template', null, ['foo', '']);
+                ɵɵtemplate(0, null, 0, 0, 'ng-template', null, 0);
               }
             },
             2, 0, [], [],
@@ -687,7 +695,8 @@ describe('query', () => {
                 ɵɵqueryRefresh(tmp = ɵɵloadQuery<QueryList<any>>()) &&
                     (ctx.query = tmp as QueryList<any>);
               }
-            });
+            },
+            [], [], undefined, [['foo', '']]);
 
         const cmptInstance = renderComponent(Cmpt);
         const qList = (cmptInstance.query as QueryList<any>);
@@ -707,7 +716,7 @@ describe('query', () => {
                'cmpt',
                function(rf: RenderFlags, ctx: any) {
                  if (rf & RenderFlags.Create) {
-                   ɵɵtemplate(0, null, 0, 0, 'ng-template', null, ['foo', '']);
+                   ɵɵtemplate(0, null, 0, 0, 'ng-template', null, 0);
                  }
                },
                2, 0, [], [],
@@ -721,7 +730,8 @@ describe('query', () => {
                    ɵɵqueryRefresh(tmp = ɵɵloadQuery<QueryList<any>>()) &&
                        (ctx.query = tmp as QueryList<any>);
                  }
-               });
+               },
+               [], [], undefined, [['foo', '']]);
 
            const cmptInstance = renderComponent(Cmpt);
            const qList = (cmptInstance.query as QueryList<any>);
@@ -742,7 +752,7 @@ describe('query', () => {
             'cmpt',
             function(rf: RenderFlags, ctx: any) {
               if (rf & RenderFlags.Create) {
-                ɵɵtemplate(0, null, 0, 0, 'ng-template', null, ['foo', '']);
+                ɵɵtemplate(0, null, 0, 0, 'ng-template', null, 0);
               }
             },
             2, 0, [], [],
@@ -755,7 +765,8 @@ describe('query', () => {
                 ɵɵqueryRefresh(tmp = ɵɵloadQuery<QueryList<any>>()) &&
                     (ctx.query = tmp as QueryList<any>);
               }
-            });
+            },
+            [], [], undefined, [['foo', '']]);
 
         const cmptInstance = renderComponent(Cmpt);
         const qList = (cmptInstance.query as QueryList<any>);
@@ -775,7 +786,7 @@ describe('query', () => {
             'cmpt',
             function(rf: RenderFlags, ctx: any) {
               if (rf & RenderFlags.Create) {
-                ɵɵtemplate(0, null, 0, 0, 'ng-template', null, ['foo', '']);
+                ɵɵtemplate(0, null, 0, 0, 'ng-template', null, 0);
               }
             },
             2, 0, [], [],
@@ -788,7 +799,8 @@ describe('query', () => {
                 ɵɵqueryRefresh(tmp = ɵɵloadQuery<QueryList<any>>()) &&
                     (ctx.query = tmp as QueryList<any>);
               }
-            });
+            },
+            [], [], undefined, [['foo', '']]);
 
         const cmptInstance = renderComponent(Cmpt);
         const qList = (cmptInstance.query as QueryList<any>);
@@ -810,7 +822,7 @@ describe('query', () => {
             'cmpt',
             function(rf: RenderFlags, ctx: any) {
               if (rf & RenderFlags.Create) {
-                ɵɵelement(0, 'child', null, ['foo', '']);
+                ɵɵelement(0, 'child', null, 0);
               }
               if (rf & RenderFlags.Update) {
                 childInstance = getDirectiveOnNode(0);
@@ -826,7 +838,8 @@ describe('query', () => {
                 ɵɵqueryRefresh(tmp = ɵɵloadQuery<QueryList<any>>()) &&
                     (ctx.query = tmp as QueryList<any>);
               }
-            });
+            },
+            [], [], undefined, [['foo', '']]);
 
         const cmptInstance = renderComponent(Cmpt);
         const qList = (cmptInstance.query as QueryList<any>);
@@ -859,7 +872,7 @@ describe('query', () => {
             'cmpt',
             function(rf: RenderFlags, ctx: any) {
               if (rf & RenderFlags.Create) {
-                ɵɵelement(0, 'child', null, ['foo', 'child']);
+                ɵɵelement(0, 'child', null, 0);
               }
             },
             2, 0, [Child], [],
@@ -872,7 +885,8 @@ describe('query', () => {
                 ɵɵqueryRefresh(tmp = ɵɵloadQuery<QueryList<any>>()) &&
                     (ctx.query = tmp as QueryList<any>);
               }
-            });
+            },
+            [], [], undefined, [['foo', 'child']]);
 
         const cmptInstance = renderComponent(Cmpt);
         const qList = (cmptInstance.query as QueryList<any>);
@@ -895,7 +909,7 @@ describe('query', () => {
                'cmpt',
                function(rf: RenderFlags, ctx: any) {
                  if (rf & RenderFlags.Create) {
-                   ɵɵelement(0, 'div', 0, ['foo', 'child']);
+                   ɵɵelement(0, 'div', 0, 1);
                  }
                  if (rf & RenderFlags.Update) {
                    childInstance = getDirectiveOnNode(0);
@@ -912,7 +926,7 @@ describe('query', () => {
                        (ctx.query = tmp as QueryList<any>);
                  }
                },
-               [], [], undefined, [['child', '']]);
+               [], [], undefined, [['child', ''], ['foo', 'child']]);
 
            const cmptInstance = renderComponent(Cmpt);
            const qList = (cmptInstance.query as QueryList<any>);
@@ -935,7 +949,7 @@ describe('query', () => {
             'cmpt',
             function(rf: RenderFlags, ctx: any) {
               if (rf & RenderFlags.Create) {
-                ɵɵelement(0, 'div', 0, ['foo', 'child1', 'bar', 'child2']);
+                ɵɵelement(0, 'div', 0, 1);
               }
               if (rf & RenderFlags.Update) {
                 child1Instance = getDirectiveOnNode(0, 0);
@@ -953,7 +967,7 @@ describe('query', () => {
                     (ctx.query = tmp as QueryList<any>);
               }
             },
-            [], [], undefined, [['child1', '', 'child2', '']]);
+            [], [], undefined, [['child1', '', 'child2', ''], ['foo', 'child1', 'bar', 'child2']]);
 
         const cmptInstance = renderComponent(Cmpt);
         const qList = (cmptInstance.query as QueryList<any>);
@@ -977,7 +991,7 @@ describe('query', () => {
             'cmpt',
             function(rf: RenderFlags, ctx: any) {
               if (rf & RenderFlags.Create) {
-                ɵɵelement(0, 'div', 0, ['foo', 'child', 'bar', 'child']);
+                ɵɵelement(0, 'div', 0, 1);
               }
               if (rf & RenderFlags.Update) {
                 childInstance = getDirectiveOnNode(0);
@@ -997,7 +1011,7 @@ describe('query', () => {
                     (ctx.barQuery = tmp as QueryList<any>);
               }
             },
-            [], [], undefined, [['child', '']]);
+            [], [], undefined, [['child', ''], ['foo', 'child', 'bar', 'child']]);
 
         const cmptInstance = renderComponent(Cmpt);
 
@@ -1024,7 +1038,7 @@ describe('query', () => {
             'cmpt',
             function(rf: RenderFlags, ctx: any) {
               if (rf & RenderFlags.Create) {
-                ɵɵelement(0, 'div', 0, ['foo', 'child']);
+                ɵɵelement(0, 'div', 0, 1);
                 div = getNativeByIndex(0, getLView());
               }
             },
@@ -1039,7 +1053,7 @@ describe('query', () => {
                     (ctx.query = tmp as QueryList<any>);
               }
             },
-            [], [], undefined, [['child', '']]);
+            [], [], undefined, [['child', ''], ['foo', 'child']]);
 
         const cmptInstance = renderComponent(Cmpt);
         const qList = (cmptInstance.query as QueryList<any>);
@@ -1061,7 +1075,7 @@ describe('query', () => {
             'cmpt',
             function(rf: RenderFlags, ctx: any) {
               if (rf & RenderFlags.Create) {
-                ɵɵelement(0, 'div', 0, ['foo', '', 'bar', 'child']);
+                ɵɵelement(0, 'div', 0, 1);
                 div = getNativeByIndex(0, getLView());
               }
               if (rf & RenderFlags.Update) {
@@ -1079,7 +1093,7 @@ describe('query', () => {
                     (ctx.query = tmp as QueryList<any>);
               }
             },
-            [], [], undefined, [['child', '']]);
+            [], [], undefined, [['child', ''], ['foo', '', 'bar', 'child']]);
 
         const cmptInstance = renderComponent(Cmpt);
         const qList = (cmptInstance.query as QueryList<any>);
@@ -1236,7 +1250,7 @@ describe('query', () => {
             'cmpt',
             function(rf: RenderFlags, ctx: any) {
               if (rf & RenderFlags.Create) {
-                ɵɵelement(0, 'div', 0, ['foo', '']);
+                ɵɵelement(0, 'div', 0, 1);
               }
             },
             2, 0, [Child], [],
@@ -1250,7 +1264,7 @@ describe('query', () => {
                     (ctx.query = tmp as QueryList<any>);
               }
             },
-            [], [], undefined, [['child', '']]);
+            [], [], undefined, [['child', ''], ['foo', '']]);
 
         const {component} = new ComponentFixture(Cmpt);
         const qList = component.query;
@@ -1314,14 +1328,11 @@ describe('query', () => {
             function(rf: RenderFlags, ctx: any) {
               if (rf & RenderFlags.Create) {
                 ɵɵtemplate(
-                    0, Cmpt_Template_1, 2, 0, 'ng-template', null, ['foo', ''],
+                    0, Cmpt_Template_1, 2, 0, 'ng-template', null, 0, ɵɵtemplateRefExtractor);
-                    ɵɵtemplateRefExtractor);
                 ɵɵtemplate(
-                    2, Cmpt_Template_1, 2, 0, 'ng-template', null, ['bar', ''],
+                    2, Cmpt_Template_1, 2, 0, 'ng-template', null, 1, ɵɵtemplateRefExtractor);
-                    ɵɵtemplateRefExtractor);
                 ɵɵtemplate(
-                    4, Cmpt_Template_1, 2, 0, 'ng-template', null, ['baz', ''],
+                    4, Cmpt_Template_1, 2, 0, 'ng-template', null, 2, ɵɵtemplateRefExtractor);
-                    ɵɵtemplateRefExtractor);
               }
             },
             6, 0, [], [],
@@ -1337,7 +1348,8 @@ describe('query', () => {
                 ɵɵqueryRefresh(tmp = ɵɵloadQuery<QueryList<any>>()) &&
                     (ctx.elemQuery = tmp as QueryList<any>);
               }
-            });
+            },
+            [], [], undefined, [['foo', ''], ['bar', ''], ['baz', '']]);
 
         const {component} = new ComponentFixture(Cmpt);
 
@@ -1363,7 +1375,7 @@ describe('query', () => {
           'some-component-with-query',
           function(rf: RenderFlags, ctx: any) {
             if (rf & RenderFlags.Create) {
-              ɵɵelement(0, 'div', null, ['foo', '']);
+              ɵɵelement(0, 'div', null, 0);
             }
           },
           2, 0, [], [],
@@ -1376,7 +1388,8 @@ describe('query', () => {
               ɵɵqueryRefresh(tmp = ɵɵloadQuery<QueryList<any>>()) &&
                   (ctx.query = queryInstance = tmp as QueryList<any>);
             }
-          });
+          },
+          [], [], undefined, [['foo', '']]);
 
       function createTemplate() { ɵɵcontainer(0); }
 
@@ -1444,7 +1457,7 @@ describe('query', () => {
         function(rf: RenderFlags, ctx: any) {
           if (rf & RenderFlags.Create) {
             ɵɵtemplate(0, AppComponent_Template_1, 1, 0, 'div', 0);
-            ɵɵelement(1, 'div', null, ['foo', '']);
+            ɵɵelement(1, 'div', null, 1);
           }
         },
         3, 0, [SomeDir], [],
@@ -1458,7 +1471,7 @@ describe('query', () => {
                 (ctx.query = tmp as QueryList<any>);
           }
         },
-        [], [], undefined, [[AttributeMarker.Template, 'someDir']]);
+        [], [], undefined, [[AttributeMarker.Template, 'someDir'], ['foo', '']]);
 
     const fixture = new ComponentFixture(AppComponent);
     expect(fixture.component.query.length).toBe(1);
@@ -1508,12 +1521,12 @@ describe('query', () => {
           function(rf: RenderFlags, ctx: any) {
             if (rf & RenderFlags.Create) {
               ɵɵelementStart(0, 'div', 0);
-              { ɵɵelement(1, 'span', null, ['foo', '']); }
+              { ɵɵelement(1, 'span', null, 1); }
               ɵɵelementEnd();
             }
           },
           3, 0, [WithContentDirective], [], null, [], [], undefined,
-          [[AttributeMarker.Bindings, 'with-content']]);
+          [[AttributeMarker.Bindings, 'with-content'], ['foo', '']]);
 
       const fixture = new ComponentFixture(AppComponent);
       expect(withContentInstance !.foos.length)
@@ -1551,7 +1564,7 @@ describe('query', () => {
                   let rf = ɵɵembeddedViewStart(1, 3, 0);
                   if (rf & RenderFlags.Create) {
                     ɵɵelementStart(0, 'div', 0);
-                    { ɵɵelement(1, 'span', null, ['foo', '']); }
+                    { ɵɵelement(1, 'span', null, 1); }
                     ɵɵelementEnd();
                   }
                   ɵɵembeddedViewEnd();
@@ -1562,7 +1575,7 @@ describe('query', () => {
             }
           },
           1, 0, [WithContentDirective], [], null, [], [], undefined,
-          [[AttributeMarker.Bindings, 'with-content']]);
+          [[AttributeMarker.Bindings, 'with-content'], ['foo', '']]);
 
       const fixture = new ComponentFixture(AppComponent);
       expect(withContentInstance !.foos.length)
@@ -1584,11 +1597,15 @@ describe('query', () => {
        * <div with-content #foo>
        * </div>
        */
-      const AppComponent = createComponent('app-component', function(rf: RenderFlags, ctx: any) {
+      const AppComponent = createComponent(
+          'app-component',
+          function(rf: RenderFlags, ctx: any) {
             if (rf & RenderFlags.Create) {
-          ɵɵelement(0, 'div', 0, ['foo', '']);
+              ɵɵelement(0, 'div', 0, 1);
             }
-      }, 2, 0, [WithContentDirective], [], null, [], [], undefined, [['with-content', '']]);
+          },
+          2, 0, [WithContentDirective], [], null, [], [], undefined,
+          [['with-content', ''], ['foo', '']]);
 
       const fixture = new ComponentFixture(AppComponent);
       expect(withContentInstance !.foos.length)
@@ -1611,9 +1628,9 @@ describe('query', () => {
           function(rf: RenderFlags, ctx: any) {
             if (rf & RenderFlags.Create) {
               ɵɵelementStart(0, 'div', 0);
-              { ɵɵelement(1, 'div', null, ['foo', '']); }
+              { ɵɵelement(1, 'div', null, 2); }
               ɵɵelementEnd();
-              ɵɵelement(3, 'div', 1, ['bar', '']);
+              ɵɵelement(3, 'div', 1, 3);
             }
           },
           5, 0, [WithContentDirective], [],
@@ -1627,7 +1644,7 @@ describe('query', () => {
                   (ctx.foos = tmp as QueryList<any>);
             }
           },
-          [], [], undefined, [['with-content', ''], ['id', 'after']]);
+          [], [], undefined, [['with-content', ''], ['id', 'after'], ['foo', ''], ['bar', '']]);
 
       const fixture = new ComponentFixture(AppComponent);
       const viewQList = fixture.component.foos;
@@ -1653,9 +1670,9 @@ describe('query', () => {
           function(rf: RenderFlags, ctx: any) {
             if (rf & RenderFlags.Create) {
               ɵɵelementStart(0, 'div', 0);
-              { ɵɵelement(1, 'div', 1, ['foo', '']); }
+              { ɵɵelement(1, 'div', 1, 2); }
               ɵɵelementEnd();
-              ɵɵelement(3, 'div', null, ['foo', '']);
+              ɵɵelement(3, 'div', null, 2);
             }
           },
           5, 0, [WithContentDirective], [],
@@ -1669,7 +1686,7 @@ describe('query', () => {
                   (ctx.bars = tmp as QueryList<any>);
             }
           },
-          [], [], undefined, [['with-content', ''], ['id', 'yes']]);
+          [], [], undefined, [['with-content', ''], ['id', 'yes'], ['foo', '']]);
 
       const fixture = new ComponentFixture(AppComponent);
       expect(withContentInstance !.foos.length).toBe(1);
@@ -1714,13 +1731,13 @@ describe('query', () => {
            */
           function(rf: RenderFlags, ctx: any) {
             if (rf & RenderFlags.Create) {
-              ɵɵelementStart(0, 'div', 0, ['out', 'query']);
+              ɵɵelementStart(0, 'div', 0, 4);
               {
-                ɵɵelement(2, 'span', 1, ['foo', '']);
+                ɵɵelement(2, 'span', 1, 5);
-                ɵɵelementStart(4, 'div', 0, ['in', 'query']);
+                ɵɵelementStart(4, 'div', 0, 6);
-                { ɵɵelement(6, 'span', 2, ['bar', '']); }
+                { ɵɵelement(6, 'span', 2, 7); }
                 ɵɵelementEnd();
-                ɵɵelement(8, 'span', 3, ['baz', '']);
+                ɵɵelement(8, 'span', 3, 8);
               }
               ɵɵelementEnd();
             }
@@ -1730,8 +1747,10 @@ describe('query', () => {
               inInstance = load<QueryDirective>(lView, 5);
             }
           },
-          10, 0, [QueryDirective], [], null, [], [], undefined,
+          10, 0, [QueryDirective], [], null, [], [], undefined, [
-          [[AttributeMarker.Bindings, 'query'], ['id', 'foo'], ['id', 'bar'], ['id', 'baz']]);
+            [AttributeMarker.Bindings, 'query'], ['id', 'foo'], ['id', 'bar'], ['id', 'baz'],
+            ['out', 'query'], ['foo', ''], ['in', 'query'], ['bar', ''], ['baz', '']
+          ]);
 
       const fixture = new ComponentFixture(AppComponent);
       expect(outInstance !.fooBars.length).toBe(3);
@@ -1775,10 +1794,10 @@ describe('query', () => {
            */
           function(rf: RenderFlags, ctx: any) {
             if (rf & RenderFlags.Create) {
-              ɵɵelementStart(0, 'div', 0, ['out', 'query']);
+              ɵɵelementStart(0, 'div', 0, 2);
               {
-                ɵɵelementStart(2, 'div', 0, ['in', 'query', 'foo', '']);
+                ɵɵelementStart(2, 'div', 0, 3);
-                { ɵɵelement(5, 'span', 1, ['foo', '']); }
+                { ɵɵelement(5, 'span', 1, 4); }
                 ɵɵelementEnd();
               }
               ɵɵelementEnd();
@@ -1789,7 +1808,10 @@ describe('query', () => {
               inInstance = load<QueryDirective>(lView, 3);
             }
           },
-          7, 0, [QueryDirective], [], null, [], [], undefined, [['query', ''], ['id', 'bar']]);
+          7, 0, [QueryDirective], [], null, [], [], undefined, [
+            ['query', ''], ['id', 'bar'], ['out', 'query'], ['in', 'query', 'foo', ''],
+            ['foo', '']
+          ]);
 
       const fixture = new ComponentFixture(AppComponent);
       expect(outInstance !.fooBars.length).toBe(1);
@@ -1832,10 +1854,10 @@ describe('query', () => {
            */
           function(rf: RenderFlags, ctx: any) {
             if (rf & RenderFlags.Create) {
-              ɵɵelementStart(0, 'div', 0, ['out', 'query']);
+              ɵɵelementStart(0, 'div', 0, 2);
               {
-                ɵɵelementStart(2, 'div', 0, ['in', 'query', 'foo', '']);
+                ɵɵelementStart(2, 'div', 0, 3);
-                { ɵɵelement(5, 'span', 1, ['foo', '']); }
+                { ɵɵelement(5, 'span', 1, 4); }
                 ɵɵelementEnd();
               }
               ɵɵelementEnd();
@@ -1846,7 +1868,10 @@ describe('query', () => {
               inInstance = load<QueryDirective>(lView, 3);
             }
           },
-          7, 0, [QueryDirective], [], null, [], [], undefined, [['query', ''], ['id', 'bar']]);
+          7, 0, [QueryDirective], [], null, [], [], undefined, [
+            ['query', ''], ['id', 'bar'], ['out', 'query'], ['in', 'query', 'foo', ''],
+            ['foo', '']
+          ]);
 
       const fixture1 = new ComponentFixture(AppComponent);
       expect(outInstance !.fooBars.length).toBe(1);
@@ -1918,11 +1943,11 @@ describe('query', () => {
               */
              function(rf: RenderFlags, ctx: any) {
                if (rf & RenderFlags.Create) {
-                 ɵɵelementStart(0, 'div', 0, ['shallow', 'shallow-query', 'deep', 'deep-query']);
+                 ɵɵelementStart(0, 'div', 0, 1);
                  {
-                   ɵɵelement(3, 'span', null, ['foo', '']);
+                   ɵɵelement(3, 'span', null, 2);
                    ɵɵelementStart(5, 'div');
-                   { ɵɵelement(6, 'span', null, ['foo', '']); }
+                   { ɵɵelement(6, 'span', null, 2); }
                    ɵɵelementEnd();
                  }
                  ɵɵelementEnd();
@@ -1933,8 +1958,10 @@ describe('query', () => {
                  deepInstance = load<DeepQueryDirective>(lView, 2);
                }
              },
-             8, 0, [ShallowQueryDirective, DeepQueryDirective], [], null, [], [], undefined,
+             8, 0, [ShallowQueryDirective, DeepQueryDirective], [], null, [], [], undefined, [
-             [[AttributeMarker.Bindings, 'shallow-query', 'deep-query']]);
+               [AttributeMarker.Bindings, 'shallow-query', 'deep-query'],
+               ['shallow', 'shallow-query', 'deep', 'deep-query'], ['foo', '']
+             ]);
 
          const fixture = new ComponentFixture(AppComponent);
          expect(shallowInstance !.foos.length).toBe(1);

packages/core/test/render3/render_util.ts

@@ -13,7 +13,7 @@ import {TemplateRef} from '@angular/core/src/linker/template_ref';
 import {ViewContainerRef} from '@angular/core/src/linker/view_container_ref';
 import {Renderer2} from '@angular/core/src/render/api';
 import {createLView, createTView, getOrCreateTNode, getOrCreateTView, renderComponentOrTemplate} from '@angular/core/src/render3/instructions/shared';
-import {TAttributes, TNodeType} from '@angular/core/src/render3/interfaces/node';
+import {TAttributes, TConstants, TNodeType} from '@angular/core/src/render3/interfaces/node';
 import {enterView, getLView} from '@angular/core/src/render3/state';
 import {stringifyElement} from '@angular/platform-browser/testing/src/browser_util';
 
@@ -103,7 +103,7 @@ export class TemplateFixture extends BaseFixture {
       private createBlock: () => void, private updateBlock: () => void = noop, decls: number = 0,
       private vars: number = 0, directives?: DirectiveTypesOrFactory|null,
       pipes?: PipeTypesOrFactory|null, sanitizer?: Sanitizer|null,
-      rendererFactory?: RendererFactory3, private _consts?: TAttributes[]) {
+      rendererFactory?: RendererFactory3, private _consts?: TConstants) {
     super();
     this._directiveDefs = toDefs(directives, extractDirectiveDef);
     this._pipeDefs = toDefs(pipes, extractPipeDef);
@@ -249,7 +249,7 @@ export function renderTemplate<T>(
     hostNode: RElement, templateFn: ComponentTemplate<T>, decls: number, vars: number, context: T,
     providedRendererFactory: RendererFactory3, componentView: LView | null,
     directives?: DirectiveDefListOrFactory | null, pipes?: PipeDefListOrFactory | null,
-    sanitizer?: Sanitizer | null, consts?: TAttributes[]): LView {
+    sanitizer?: Sanitizer | null, consts?: TConstants): LView {
   if (componentView === null) {
     const renderer = providedRendererFactory.createRenderer(null, null);
 
@@ -288,8 +288,7 @@ export function renderTemplate<T>(
 export function renderToHtml(
     template: ComponentTemplate<any>, ctx: any, decls: number = 0, vars: number = 0,
     directives?: DirectiveTypesOrFactory | null, pipes?: PipeTypesOrFactory | null,
-    providedRendererFactory?: RendererFactory3 | null, keepNgReflect = false,
+    providedRendererFactory?: RendererFactory3 | null, keepNgReflect = false, consts?: TConstants) {
-    consts?: TAttributes[]) {
   hostView = renderTemplate(
       containerEl, template, decls, vars, ctx, providedRendererFactory || testRendererFactory,
       hostView, toDefs(directives, extractDirectiveDef), toDefs(pipes, extractPipeDef), null,
@@ -369,7 +368,7 @@ export function createComponent(
     directives: DirectiveTypesOrFactory = [], pipes: PipeTypesOrFactory = [],
     viewQuery: ComponentTemplate<any>| null = null, providers: Provider[] = [],
     viewProviders: Provider[] = [], hostBindings?: HostBindingsFunction<any>,
-    consts: TAttributes[] = []): ComponentType<any> {
+    consts: TConstants = []): ComponentType<any> {
   return class Component {
     value: any;
     static ɵfac = () => new Component;

packages/core/test/render3/view_container_ref_spec.ts

@@ -441,10 +441,10 @@ describe('ViewContainerRef', () => {
           selectors: [['dynamic-cmpt-with-view-queries']],
           decls: 2,
           vars: 0,
-          consts: [['bar', '']],
+          consts: [['foo', ''], ['bar', '']],
           template: (rf: RenderFlags, ctx: DynamicCompWithViewQueries) => {
             if (rf & RenderFlags.Create) {
-              ɵɵelement(0, 'div', 0, ['foo', '']);
+              ɵɵelement(0, 'div', 1, 0);
             }
             // testing only
             fooEl = getNativeByIndex(0, getLView()) as RElement;

tools/public_api_guard/core/core.d.ts

@@ -760,7 +760,7 @@ export declare function ɵɵdefineComponent<T>(componentDefinition: {
     contentQueries?: ContentQueriesFunction<T>;
     exportAs?: string[];
     template: ComponentTemplate<T>;
-    consts?: TAttributes[];
+    consts?: TConstants;
     ngContentSelectors?: string[];
     viewQuery?: ViewQueriesFunction<T> | null;
     features?: ComponentDefFeature[];
@@ -826,19 +826,19 @@ export declare function ɵɵdirectiveInject<T>(token: Type<T> | InjectionToken<T
 
 export declare function ɵɵdisableBindings(): void;
 
-export declare function ɵɵelement(index: number, name: string, constsIndex?: number | null, localRefs?: string[] | null): void;
+export declare function ɵɵelement(index: number, name: string, attrsIndex?: number | null, localRefsIndex?: number): void;
 
-export declare function ɵɵelementContainer(index: number, constsIndex?: number | null, localRefs?: string[] | null): void;
+export declare function ɵɵelementContainer(index: number, attrsIndex?: number | null, localRefsIndex?: number): void;
 
 export declare function ɵɵelementContainerEnd(): void;
 
-export declare function ɵɵelementContainerStart(index: number, constsIndex?: number | null, localRefs?: string[] | null): void;
+export declare function ɵɵelementContainerStart(index: number, attrsIndex?: number | null, localRefsIndex?: number): void;
 
 export declare function ɵɵelementEnd(): void;
 
 export declare function ɵɵelementHostAttrs(attrs: TAttributes): void;
 
-export declare function ɵɵelementStart(index: number, name: string, constsIndex?: number | null, localRefs?: string[] | null): void;
+export declare function ɵɵelementStart(index: number, name: string, attrsIndex?: number | null, localRefsIndex?: number): void;
 
 export declare function ɵɵembeddedViewEnd(): void;
 
@@ -1054,7 +1054,7 @@ export declare function ɵɵstylePropInterpolateV(prop: string, values: any[], v
 
 export declare function ɵɵstyleSanitizer(sanitizer: StyleSanitizeFn | null): void;
 
-export declare function ɵɵtemplate(index: number, templateFn: ComponentTemplate<any> | null, decls: number, vars: number, tagName?: string | null, constsIndex?: number | null, localRefs?: string[] | null, localRefExtractor?: LocalRefExtractor): void;
+export declare function ɵɵtemplate(index: number, templateFn: ComponentTemplate<any> | null, decls: number, vars: number, tagName?: string | null, attrsIndex?: number | null, localRefsIndex?: number | null, localRefExtractor?: LocalRefExtractor): void;
 
 export declare function ɵɵtemplateRefExtractor(tNode: TNode, currentView: LView): ViewEngine_TemplateRef<unknown> | null;