Revert "Merge pull request #444 from tildeio/artisinal-code-stripping"

This reverts commit 82a2ab8, reversing
changes made to c56ef68.

packages/@glimmer/compiler/lib/javascript-compiler.ts

@@ -1,6 +1,6 @@
 import * as WireFormat from '@glimmer/wire-format';
 import { assert } from "@glimmer/util";
-import { Stack, DictSet, Option } from "@glimmer/util";
+import { Stack, DictSet, Option, expect } from "@glimmer/util";
 import { AST } from '@glimmer/syntax';
 import { BlockSymbolTable, ProgramSymbolTable } from './template-visitor';
 
@@ -169,7 +169,7 @@ export default class JavaScriptCompiler<T extends TemplateMeta> {
   }
 
   get currentBlock(): Block {
-    return this.blocks.current;
+    return expect(this.blocks.current, 'Expected a block on the stack');
   }
 
   process(): Template<T> {
@@ -228,6 +228,8 @@ export default class JavaScriptCompiler<T extends TemplateMeta> {
     let hash = this.popValue<Hash>();
 
     let blocks = this.template.block.blocks;
+    assert(typeof template !== 'number' || blocks[template] !== null, 'missing block in the compiler');
+    assert(typeof inverse !== 'number' || blocks[inverse] !== null, 'missing block in the compiler');
 
     this.push([Ops.Block, name, params, hash, blocks[template], blocks[inverse]]);
   }
@@ -350,6 +352,7 @@ export default class JavaScriptCompiler<T extends TemplateMeta> {
 
   endComponent(): [WireFormat.Statements.Attribute[], WireFormat.Core.Hash, Option<WireFormat.SerializedInlineBlock>] {
     let component = this.blocks.pop();
+    assert(component instanceof ComponentBlock, "Compiler bug: endComponent() should end a component");
     return (component as ComponentBlock).toJSON();
   }
 
@@ -364,6 +367,7 @@ export default class JavaScriptCompiler<T extends TemplateMeta> {
   }
 
   prepareObject(size: number) {
+    assert(this.values.length >= size, `Expected ${size} values on the stack, found ${this.values.length}`);
 
     let keys: string[] = new Array(size);
     let values: Expression[] = new Array(size);
@@ -391,6 +395,7 @@ export default class JavaScriptCompiler<T extends TemplateMeta> {
   }
 
   popValue<T extends StackValue>(): T {
+    assert(this.values.length, "No expression found on stack");
     return this.values.pop() as T;
   }
 }

packages/@glimmer/compiler/lib/template-compiler.ts

@@ -1,6 +1,7 @@
 import TemplateVisitor, { SymbolTable, Action } from "./template-visitor";
 import JavaScriptCompiler, { Template } from "./javascript-compiler";
 import { Stack, getAttrNamespace } from "@glimmer/util";
+import { assert, expect } from "@glimmer/util";
 import { TemplateMeta } from "@glimmer/wire-format";
 import { AST, isLiteral } from '@glimmer/syntax';
 
@@ -34,7 +35,7 @@ export default class TemplateCompiler<T extends TemplateMeta> {
   }
 
   get symbols(): SymbolTable {
-    return this.symbolStack.current;
+    return expect(this.symbolStack.current, 'Expected a symbol table on the stack');
   }
 
   process(actions: Action[]): Action[] {
@@ -306,6 +307,7 @@ export default class TemplateCompiler<T extends TemplateMeta> {
     for (let i = params.length - 1; i >= 0; i--) {
       let param = params[i];
 
+      assert(this[param.type], `Unimplemented ${param.type} on TemplateCompiler`);
       (this[param.type] as any)(param);
     }
 
@@ -323,6 +325,7 @@ export default class TemplateCompiler<T extends TemplateMeta> {
     for (let i = pairs.length - 1; i >= 0; i--) {
       let { key, value } = pairs[i];
 
+      assert(this[value.type], `Unimplemented ${value.type} on TemplateCompiler`);
       (this[value.type] as any)(value);
       this.opcode('literal', null, key);
     }

packages/@glimmer/compiler/lib/template-visitor.ts

@@ -1,6 +1,6 @@
 import { AST } from '@glimmer/syntax';
 import { Core } from '@glimmer/wire-format';
-import { Dict, Option, dict } from '@glimmer/util';
+import { Dict, Option, dict, unreachable, expect } from '@glimmer/util';
 
 export abstract class SymbolTable {
   static top(): ProgramSymbolTable {
@@ -35,6 +35,7 @@ export class ProgramSymbolTable extends SymbolTable {
   }
 
   get(_name: string): never {
+    throw unreachable();
   }
 
   getLocalsMap(): Dict<number> {
@@ -344,7 +345,7 @@ export default class TemplateVisitor {
   // Frame helpers
 
   private get currentFrame(): Frame {
-    return this.getCurrentFrame();
+    return expect(this.getCurrentFrame(), "Expected a current frame");
   }
 
   private getCurrentFrame(): Option<Frame> {

packages/@glimmer/reference/lib/iterable.ts

@@ -1,4 +1,4 @@
-import { LinkedList, ListNode, Opaque, Option, dict } from '@glimmer/util';
+import { LinkedList, ListNode, Opaque, Option, dict, expect } from '@glimmer/util';
 import { VersionedPathReference as PathReference, Tag } from './validators';
 
 export interface IterationItem<T, U> {
@@ -247,6 +247,8 @@ export class IteratorSynchronizer {
   private nextRetain(item: OpaqueIterationItem) {
     let { artifacts, current } = this;
 
+    current = expect(current, 'BUG: current is empty');
+
     current.update(item);
     this.current = artifacts.nextNode(current);
     this.target.retain(item.key, current.value, current.memo);

packages/@glimmer/runtime/index.ts

@@ -38,6 +38,7 @@ export {
 
 export {
   Register,
+  debugSlice
 } from './lib/opcodes';
 
 export {

packages/@glimmer/runtime/lib/builder.ts

@@ -2,7 +2,7 @@ import Bounds, { Cursor, DestroyableBounds, clear } from './bounds';
 
 import { DOMChanges, DOMTreeConstruction } from './dom/helper';
 
-import { Option, Destroyable, Stack, LinkedList, LinkedListNode, } from '@glimmer/util';
+import { Option, Destroyable, Stack, LinkedList, LinkedListNode, assert, expect } from '@glimmer/util';
 
 import { Environment } from './environment';
 
@@ -114,16 +114,16 @@ export class ElementStack implements Cursor {
     this.nextSiblingStack.push(this.nextSibling);
   }
 
-  expectConstructing(_: string): Simple.Element {
-    return this.constructing!;
+  expectConstructing(method: string): Simple.Element {
+    return expect(this.constructing!, `${method} should only be called while constructing an element`);
   }
 
-  expectOperations(_: string): ElementOperations {
-    return this.operations!;
+  expectOperations(method: string): ElementOperations {
+    return expect(this.operations!, `${method} should only be called while constructing an element`);
   }
 
   block(): Tracker {
-    return this.blockStack.current!;
+    return expect(this.blockStack.current!, "Expected a current block tracker");
   }
 
   popElement() {
@@ -133,7 +133,11 @@ export class ElementStack implements Cursor {
     nextSiblingStack.pop();
     // LOGGER.debug(`-> element stack ${this.elementStack.toArray().map(e => e.tagName).join(', ')}`);
 
+<<<<<<< HEAD
     this.element = elementStack.current!;
+=======
+    this.element = expect(elementStack.current, "can't pop past the last element");
+>>>>>>> parent of 82a2ab8... Merge pull request #444 from tildeio/artisinal-code-stripping
     this.nextSibling = nextSiblingStack.current;
 
     return topElement;
@@ -182,7 +186,11 @@ export class ElementStack implements Cursor {
   popBlock(): Tracker {
     this.block().finalize(this);
 
+<<<<<<< HEAD
     return this.blockStack.pop()!;
+=======
+    return expect(this.blockStack.pop(), "Expected popBlock to return a block");
+>>>>>>> parent of 82a2ab8... Merge pull request #444 from tildeio/artisinal-code-stripping
   }
 
   openElement(tag: string, _operations?: ElementOperations): Simple.Element {
@@ -198,7 +206,11 @@ export class ElementStack implements Cursor {
 
   flushElement() {
     let parent  = this.element;
+<<<<<<< HEAD
     let element = this.constructing!;
+=======
+    let element = expect(this.constructing, `flushElement should only be called when constructing an element`);
+>>>>>>> parent of 82a2ab8... Merge pull request #444 from tildeio/artisinal-code-stripping
 
     this.dom.insertBefore(parent, element, this.nextSibling);
 
@@ -414,12 +426,15 @@ class BlockListTracker implements Tracker {
   }
 
   openElement(_element: Element) {
+    assert(false, 'Cannot openElement directly inside a block list');
   }
 
   closeElement() {
+    assert(false, 'Cannot closeElement directly inside a block list');
   }
 
   newNode(_node: Node) {
+    assert(false, 'Cannot create a new node directly inside a block list');
   }
 
   newBounds(_bounds: Bounds) {

packages/@glimmer/runtime/lib/compat/svg-inner-html-fix.ts

@@ -1,6 +1,6 @@
 import { Bounds, ConcreteBounds } from '../bounds';
 import { moveNodesBefore, DOMChanges, DOMTreeConstruction } from '../dom/helper';
-import { Option } from '@glimmer/util';
+import { Option, unwrap } from '@glimmer/util';
 
 export const SVG_NAMESPACE = 'http://www.w3.org/2000/svg';
 export type SVG_NAMESPACE = typeof SVG_NAMESPACE;
@@ -85,7 +85,7 @@ function shouldApplyFix(document: Document, svgNamespace: SVG_NAMESPACE) {
     // Safari: Will throw, insertAdjacentHTML is not present on SVG
   } finally {
     // FF: Old versions will create a node in the wrong namespace
-    if (svg.childNodes.length === 1 && svg.firstChild.namespaceURI === SVG_NAMESPACE) {
+    if (svg.childNodes.length === 1 && unwrap(svg.firstChild).namespaceURI === SVG_NAMESPACE) {
       // The test worked as expected, no fix required
       return false;
     }

packages/@glimmer/runtime/lib/compiled/opcodes/builder.ts

@@ -4,7 +4,7 @@ import * as vm from './vm';
 import { Insertion } from '../../upsert';
 import { Register } from '../../opcodes';
 import * as WireFormat from '@glimmer/wire-format';
-import { Option, Stack, Opaque, dict, fillNulls, EMPTY_ARRAY } from '@glimmer/util';
+import { Option, Stack, Opaque, dict, expect, fillNulls, EMPTY_ARRAY } from '@glimmer/util';
 import {
   Constants,
   ConstantString,
@@ -98,15 +98,15 @@ export abstract class BasicOpcodeBuilder {
   // helpers
 
   private get labels(): Labels {
-    return this.labelsStack.current;
+    return expect(this.labelsStack.current, 'bug: not in a label stack');
   }
 
   startLabels() {
     this.labelsStack.push(new Labels());
   }
 
   stopLabels() {
-    let label = this.labelsStack.pop();
+    let label = expect(this.labelsStack.pop(), 'unbalanced push and pop labels');
     label.patch(this.program);
   }
 

packages/@glimmer/runtime/lib/compiled/opcodes/component.ts

@@ -183,6 +183,14 @@ export class UpdateComponentOpcode extends UpdatingOpcode {
 
     manager.update(component, dynamicScope);
   }
+
+  toJSON(): OpcodeJSON {
+    return {
+      guid: this._guid,
+      type: this.type,
+      args: [JSON.stringify(this.name)]
+    };
+  }
 }
 
 export class DidUpdateLayoutOpcode extends UpdatingOpcode {

packages/@glimmer/runtime/lib/compiled/opcodes/content.ts

@@ -214,6 +214,16 @@ abstract class UpdateOpcode<T extends Insertion> extends UpdatingOpcode {
       bounds.update(upsert.bounds);
     }
   }
+
+  toJSON(): OpcodeJSON {
+    let { _guid: guid, type, cache } = this;
+
+    return {
+      guid,
+      type,
+      details: { lastValue: JSON.stringify(cache.peek()) }
+    };
+  }
 }
 
 abstract class GuardedUpdateOpcode<T extends Insertion> extends UpdateOpcode<T> {
@@ -275,6 +285,21 @@ abstract class GuardedUpdateOpcode<T extends Insertion> extends UpdateOpcode<T>
 
     return null as any;
   }
+
+  toJSON(): OpcodeJSON {
+    let { _guid: guid, type, deopted } = this;
+
+    if (deopted) {
+      return {
+        guid,
+        type,
+        deopted: true,
+        children: [deopted.toJSON()]
+      };
+    } else {
+      return super.toJSON();
+    }
+  }
 }
 
 export class OptimizedCautiousAppendOpcode extends AppendDynamicOpcode<CautiousInsertion> {