add hw2

node_modules/sucrase/dist/esm/parser/traverser/base.js

@@ -0,0 +1,60 @@
+import State from "../tokenizer/state";
+import {charCodes} from "../util/charcodes";
+
+export let isJSXEnabled;
+export let isTypeScriptEnabled;
+export let isFlowEnabled;
+export let state;
+export let input;
+export let nextContextId;
+
+export function getNextContextId() {
+  return nextContextId++;
+}
+
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+export function augmentError(error) {
+  if ("pos" in error) {
+    const loc = locationForIndex(error.pos);
+    error.message += ` (${loc.line}:${loc.column})`;
+    error.loc = loc;
+  }
+  return error;
+}
+
+export class Loc {
+  
+  
+  constructor(line, column) {
+    this.line = line;
+    this.column = column;
+  }
+}
+
+export function locationForIndex(pos) {
+  let line = 1;
+  let column = 1;
+  for (let i = 0; i < pos; i++) {
+    if (input.charCodeAt(i) === charCodes.lineFeed) {
+      line++;
+      column = 1;
+    } else {
+      column++;
+    }
+  }
+  return new Loc(line, column);
+}
+
+export function initParser(
+  inputCode,
+  isJSXEnabledArg,
+  isTypeScriptEnabledArg,
+  isFlowEnabledArg,
+) {
+  input = inputCode;
+  state = new State();
+  nextContextId = 1;
+  isJSXEnabled = isJSXEnabledArg;
+  isTypeScriptEnabled = isTypeScriptEnabledArg;
+  isFlowEnabled = isFlowEnabledArg;
+}