added babel

1 files changed, 240 insertions, 0 deletions

diff --git a/node_modules/@babel/plugin-transform-optional-chaining/lib/index.js b/node_modules/@babel/plugin-transform-optional-chaining/lib/index.js
new file mode 100644
index 00000000..b929cf40
--- /dev/null
+++ b/node_modules/@babel/plugin-transform-optional-chaining/lib/index.js
@@ -0,0 +1,240 @@
+'use strict';
+
+Object.defineProperty(exports, '__esModule', { value: true });
+
+var helperPluginUtils = require('@babel/helper-plugin-utils');
+var core = require('@babel/core');
+var helperSkipTransparentExpressionWrappers = require('@babel/helper-skip-transparent-expression-wrappers');
+
+function willPathCastToBoolean(path) {
+  const maybeWrapped = findOutermostTransparentParent(path);
+  const {
+    node,
+    parentPath
+  } = maybeWrapped;
+  if (parentPath.isLogicalExpression()) {
+    const {
+      operator,
+      right
+    } = parentPath.node;
+    if (operator === "&&" || operator === "||" || operator === "??" && node === right) {
+      return willPathCastToBoolean(parentPath);
+    }
+  }
+  if (parentPath.isSequenceExpression()) {
+    const {
+      expressions
+    } = parentPath.node;
+    if (expressions[expressions.length - 1] === node) {
+      return willPathCastToBoolean(parentPath);
+    } else {
+      return true;
+    }
+  }
+  return parentPath.isConditional({
+    test: node
+  }) || parentPath.isUnaryExpression({
+    operator: "!"
+  }) || parentPath.isLoop({
+    test: node
+  });
+}
+function findOutermostTransparentParent(path) {
+  let maybeWrapped = path;
+  path.findParent(p => {
+    if (!helperSkipTransparentExpressionWrappers.isTransparentExprWrapper(p.node)) return true;
+    maybeWrapped = p;
+  });
+  return maybeWrapped;
+}
+
+const last = arr => arr[arr.length - 1];
+function isSimpleMemberExpression(expression) {
+  expression = helperSkipTransparentExpressionWrappers.skipTransparentExprWrapperNodes(expression);
+  return core.types.isIdentifier(expression) || core.types.isSuper(expression) || core.types.isMemberExpression(expression) && !expression.computed && isSimpleMemberExpression(expression.object);
+}
+function needsMemoize(path) {
+  let optionalPath = path;
+  const {
+    scope
+  } = path;
+  while (optionalPath.isOptionalMemberExpression() || optionalPath.isOptionalCallExpression()) {
+    const {
+      node
+    } = optionalPath;
+    const childPath = helperSkipTransparentExpressionWrappers.skipTransparentExprWrappers(optionalPath.isOptionalMemberExpression() ? optionalPath.get("object") : optionalPath.get("callee"));
+    if (node.optional) {
+      return !scope.isStatic(childPath.node);
+    }
+    optionalPath = childPath;
+  }
+}
+const NULLISH_CHECK = core.template.expression(`%%check%% === null || %%ref%% === void 0`);
+const NULLISH_CHECK_NO_DDA = core.template.expression(`%%check%% == null`);
+const NULLISH_CHECK_NEG = core.template.expression(`%%check%% !== null && %%ref%% !== void 0`);
+const NULLISH_CHECK_NO_DDA_NEG = core.template.expression(`%%check%% != null`);
+function transformOptionalChain(path, {
+  pureGetters,
+  noDocumentAll
+}, replacementPath, ifNullish, wrapLast) {
+  const {
+    scope
+  } = path;
+  if (scope.path.isPattern() && needsMemoize(path)) {
+    replacementPath.replaceWith(core.template.expression.ast`(() => ${replacementPath.node})()`);
+    return;
+  }
+  const optionals = [];
+  let optionalPath = path;
+  while (optionalPath.isOptionalMemberExpression() || optionalPath.isOptionalCallExpression()) {
+    const {
+      node
+    } = optionalPath;
+    if (node.optional) {
+      optionals.push(node);
+    }
+    if (optionalPath.isOptionalMemberExpression()) {
+      optionalPath.node.type = "MemberExpression";
+      optionalPath = helperSkipTransparentExpressionWrappers.skipTransparentExprWrappers(optionalPath.get("object"));
+    } else if (optionalPath.isOptionalCallExpression()) {
+      optionalPath.node.type = "CallExpression";
+      optionalPath = helperSkipTransparentExpressionWrappers.skipTransparentExprWrappers(optionalPath.get("callee"));
+    }
+  }
+  if (optionals.length === 0) {
+    return;
+  }
+  const checks = [];
+  let tmpVar;
+  for (let i = optionals.length - 1; i >= 0; i--) {
+    const node = optionals[i];
+    const isCall = core.types.isCallExpression(node);
+    const chainWithTypes = isCall ? node.callee : node.object;
+    const chain = helperSkipTransparentExpressionWrappers.skipTransparentExprWrapperNodes(chainWithTypes);
+    let ref;
+    let check;
+    if (isCall && core.types.isIdentifier(chain, {
+      name: "eval"
+    })) {
+      check = ref = chain;
+      node.callee = core.types.sequenceExpression([core.types.numericLiteral(0), ref]);
+    } else if (pureGetters && isCall && isSimpleMemberExpression(chain)) {
+      check = ref = node.callee;
+    } else if (scope.isStatic(chain)) {
+      check = ref = chainWithTypes;
+    } else {
+      if (!tmpVar || isCall) {
+        tmpVar = scope.generateUidIdentifierBasedOnNode(chain);
+        scope.push({
+          id: core.types.cloneNode(tmpVar)
+        });
+      }
+      ref = tmpVar;
+      check = core.types.assignmentExpression("=", core.types.cloneNode(tmpVar), chainWithTypes);
+      isCall ? node.callee = ref : node.object = ref;
+    }
+    if (isCall && core.types.isMemberExpression(chain)) {
+      if (pureGetters && isSimpleMemberExpression(chain)) {
+        node.callee = chainWithTypes;
+      } else {
+        const {
+          object
+        } = chain;
+        let context;
+        if (core.types.isSuper(object)) {
+          context = core.types.thisExpression();
+        } else {
+          const memoized = scope.maybeGenerateMemoised(object);
+          if (memoized) {
+            context = memoized;
+            chain.object = core.types.assignmentExpression("=", memoized, object);
+          } else {
+            context = object;
+          }
+        }
+        node.arguments.unshift(core.types.cloneNode(context));
+        node.callee = core.types.memberExpression(node.callee, core.types.identifier("call"));
+      }
+    }
+    const data = {
+      check: core.types.cloneNode(check),
+      ref: core.types.cloneNode(ref)
+    };
+    Object.defineProperty(data, "ref", {
+      enumerable: false
+    });
+    checks.push(data);
+  }
+  let result = replacementPath.node;
+  if (wrapLast) result = wrapLast(result);
+  const ifNullishBoolean = core.types.isBooleanLiteral(ifNullish);
+  const ifNullishFalse = ifNullishBoolean && ifNullish.value === false;
+  const ifNullishVoid = !ifNullishBoolean && core.types.isUnaryExpression(ifNullish, {
+    operator: "void"
+  });
+  const isEvaluationValueIgnored = core.types.isExpressionStatement(replacementPath.parent) && !replacementPath.isCompletionRecord() || core.types.isSequenceExpression(replacementPath.parent) && last(replacementPath.parent.expressions) !== replacementPath.node;
+  const tpl = ifNullishFalse ? noDocumentAll ? NULLISH_CHECK_NO_DDA_NEG : NULLISH_CHECK_NEG : noDocumentAll ? NULLISH_CHECK_NO_DDA : NULLISH_CHECK;
+  const logicalOp = ifNullishFalse ? "&&" : "||";
+  const check = checks.map(tpl).reduce((expr, check) => core.types.logicalExpression(logicalOp, expr, check));
+  replacementPath.replaceWith(ifNullishBoolean || ifNullishVoid && isEvaluationValueIgnored ? core.types.logicalExpression(logicalOp, check, result) : core.types.conditionalExpression(check, ifNullish, result));
+}
+function transform(path, assumptions) {
+  const {
+    scope
+  } = path;
+  const maybeWrapped = findOutermostTransparentParent(path);
+  const {
+    parentPath
+  } = maybeWrapped;
+  if (parentPath.isUnaryExpression({
+    operator: "delete"
+  })) {
+    transformOptionalChain(path, assumptions, parentPath, core.types.booleanLiteral(true));
+  } else {
+    let wrapLast;
+    if (parentPath.isCallExpression({
+      callee: maybeWrapped.node
+    }) && path.isOptionalMemberExpression()) {
+      wrapLast = replacement => {
+        var _baseRef;
+        const object = helperSkipTransparentExpressionWrappers.skipTransparentExprWrapperNodes(replacement.object);
+        let baseRef;
+        if (!assumptions.pureGetters || !isSimpleMemberExpression(object)) {
+          baseRef = scope.maybeGenerateMemoised(object);
+          if (baseRef) {
+            replacement.object = core.types.assignmentExpression("=", baseRef, object);
+          }
+        }
+        return core.types.callExpression(core.types.memberExpression(replacement, core.types.identifier("bind")), [core.types.cloneNode((_baseRef = baseRef) != null ? _baseRef : object)]);
+      };
+    }
+    transformOptionalChain(path, assumptions, path, willPathCastToBoolean(maybeWrapped) ? core.types.booleanLiteral(false) : scope.buildUndefinedNode(), wrapLast);
+  }
+}
+
+var index = helperPluginUtils.declare((api, options) => {
+  var _api$assumption, _api$assumption2;
+  api.assertVersion(7);
+  const {
+    loose = false
+  } = options;
+  const noDocumentAll = (_api$assumption = api.assumption("noDocumentAll")) != null ? _api$assumption : loose;
+  const pureGetters = (_api$assumption2 = api.assumption("pureGetters")) != null ? _api$assumption2 : loose;
+  return {
+    name: "transform-optional-chaining",
+    inherits: require("@babel/plugin-syntax-optional-chaining").default,
+    visitor: {
+      "OptionalCallExpression|OptionalMemberExpression"(path) {
+        transform(path, {
+          noDocumentAll,
+          pureGetters
+        });
+      }
+    }
+  };
+});
+
+exports.default = index;
+exports.transform = transform;
+exports.transformOptionalChain = transformOptionalChain;
+//# sourceMappingURL=index.js.map