refactor(ivy): move ngcc into a higher level folder (#29092)

PR Close #29092

packages/compiler-cli/ngcc/src/utils.ts

@@ -0,0 +1,52 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+import * as ts from 'typescript';
+
+export function getOriginalSymbol(checker: ts.TypeChecker): (symbol: ts.Symbol) => ts.Symbol {
+  return function(symbol: ts.Symbol) {
+    return ts.SymbolFlags.Alias & symbol.flags ? checker.getAliasedSymbol(symbol) : symbol;
+  };
+}
+
+export function isDefined<T>(value: T | undefined | null): value is T {
+  return (value !== undefined) && (value !== null);
+}
+
+export function getNameText(name: ts.PropertyName | ts.BindingName): string {
+  return ts.isIdentifier(name) || ts.isLiteralExpression(name) ? name.text : name.getText();
+}
+
+/**
+ * Parse down the AST and capture all the nodes that satisfy the test.
+ * @param node The start node.
+ * @param test The function that tests whether a node should be included.
+ * @returns a collection of nodes that satisfy the test.
+ */
+export function findAll<T>(node: ts.Node, test: (node: ts.Node) => node is ts.Node & T): T[] {
+  const nodes: T[] = [];
+  findAllVisitor(node);
+  return nodes;
+
+  function findAllVisitor(n: ts.Node) {
+    if (test(n)) {
+      nodes.push(n);
+    } else {
+      n.forEachChild(child => findAllVisitor(child));
+    }
+  }
+}
+
+/**
+ * Does the given declaration have a name which is an identifier?
+ * @param declaration The declaration to test.
+ * @returns true if the declaration has an identifer for a name.
+ */
+export function hasNameIdentifier(declaration: ts.Declaration): declaration is ts.Declaration&
+    {name: ts.Identifier} {
+  return ts.isIdentifier((declaration as any).name);
+}