First commit.

Signed-off-by: Chen Xiao <abigwc@gmail.com>

client/node_modules/@chevrotain/utils/src/api.ts

@@ -0,0 +1,3 @@
+export { PRINT_WARNING, PRINT_ERROR } from "./print.js";
+export { timer } from "./timer.js";
+export { toFastProperties } from "./to-fast-properties.js";

client/node_modules/@chevrotain/utils/src/print.ts

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+export function PRINT_ERROR(msg: string) {
+  /* istanbul ignore else - can't override global.console in node.js */
+  if (console && console.error) {
+    console.error(`Error: ${msg}`);
+  }
+}
+
+export function PRINT_WARNING(msg: string) {
+  /* istanbul ignore else - can't override global.console in node.js*/
+  if (console && console.warn) {
+    // TODO: modify docs accordingly
+    console.warn(`Warning: ${msg}`);
+  }
+}

client/node_modules/@chevrotain/utils/src/timer.ts

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+export function timer<T>(func: () => T): { time: number; value: T } {
+  const start = new Date().getTime();
+  const val = func();
+  const end = new Date().getTime();
+  const total = end - start;
+  return { time: total, value: val };
+}

client/node_modules/@chevrotain/utils/src/to-fast-properties.ts

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+// based on: https://github.com/petkaantonov/bluebird/blob/b97c0d2d487e8c5076e8bd897e0dcd4622d31846/src/util.js#L201-L216
+export function toFastProperties(toBecomeFast: any) {
+  function FakeConstructor() {}
+
+  // If our object is used as a constructor, it would receive
+  FakeConstructor.prototype = toBecomeFast;
+  const fakeInstance = new (FakeConstructor as any)();
+
+  function fakeAccess() {
+    return typeof fakeInstance.bar;
+  }
+
+  // help V8 understand this is a "real" prototype by actually using
+  // the fake instance.
+  fakeAccess();
+  fakeAccess();
+
+  // Always true condition to suppress the Firefox warning of unreachable
+  // code after a return statement.
+  if (1) return toBecomeFast;
+
+  // Eval prevents optimization of this method (even though this is dead code)
+  // - https://esbuild.github.io/content-types/#direct-eval
+  /* istanbul ignore next */
+  // tslint:disable-next-line
+  (0, eval)(toBecomeFast);
+}