added babel

1 files changed, 143 insertions, 0 deletions

diff --git a/node_modules/@babel/plugin-transform-parameters/lib/params.js b/node_modules/@babel/plugin-transform-parameters/lib/params.js
new file mode 100644
index 00000000..e5007013
--- /dev/null
+++ b/node_modules/@babel/plugin-transform-parameters/lib/params.js
@@ -0,0 +1,143 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = convertFunctionParams;
+var _core = require("@babel/core");
+var _shadowUtils = require("./shadow-utils.js");
+const buildDefaultParam = _core.template.statement(`
+  let VARIABLE_NAME =
+    arguments.length > ARGUMENT_KEY && arguments[ARGUMENT_KEY] !== undefined ?
+      arguments[ARGUMENT_KEY]
+    :
+      DEFAULT_VALUE;
+`);
+const buildLooseDefaultParam = _core.template.statement(`
+  if (ASSIGNMENT_IDENTIFIER === UNDEFINED) {
+    ASSIGNMENT_IDENTIFIER = DEFAULT_VALUE;
+  }
+`);
+const buildLooseDestructuredDefaultParam = _core.template.statement(`
+  let ASSIGNMENT_IDENTIFIER = PARAMETER_NAME === UNDEFINED ? DEFAULT_VALUE : PARAMETER_NAME ;
+`);
+const buildSafeArgumentsAccess = _core.template.statement(`
+  let $0 = arguments.length > $1 ? arguments[$1] : undefined;
+`);
+function convertFunctionParams(path, ignoreFunctionLength, shouldTransformParam, replaceRestElement) {
+  const params = path.get("params");
+  const isSimpleParameterList = params.every(param => param.isIdentifier());
+  if (isSimpleParameterList) return false;
+  const {
+    node,
+    scope
+  } = path;
+  const body = [];
+  const shadowedParams = new Set();
+  for (const param of params) {
+    (0, _shadowUtils.collectShadowedParamsNames)(param, scope, shadowedParams);
+  }
+  const state = {
+    needsOuterBinding: false,
+    scope
+  };
+  if (shadowedParams.size === 0) {
+    for (const param of params) {
+      if (!param.isIdentifier()) param.traverse(_shadowUtils.iifeVisitor, state);
+      if (state.needsOuterBinding) break;
+    }
+  }
+  let firstOptionalIndex = null;
+  for (let i = 0; i < params.length; i++) {
+    const param = params[i];
+    if (shouldTransformParam && !shouldTransformParam(i)) {
+      continue;
+    }
+    const transformedRestNodes = [];
+    if (replaceRestElement) {
+      replaceRestElement(path, param, transformedRestNodes);
+    }
+    const paramIsAssignmentPattern = param.isAssignmentPattern();
+    if (paramIsAssignmentPattern && (ignoreFunctionLength || _core.types.isMethod(node, {
+      kind: "set"
+    }))) {
+      const left = param.get("left");
+      const right = param.get("right");
+      const undefinedNode = scope.buildUndefinedNode();
+      if (left.isIdentifier()) {
+        body.push(buildLooseDefaultParam({
+          ASSIGNMENT_IDENTIFIER: _core.types.cloneNode(left.node),
+          DEFAULT_VALUE: right.node,
+          UNDEFINED: undefinedNode
+        }));
+        param.replaceWith(left.node);
+      } else if (left.isObjectPattern() || left.isArrayPattern()) {
+        const paramName = scope.generateUidIdentifier();
+        body.push(buildLooseDestructuredDefaultParam({
+          ASSIGNMENT_IDENTIFIER: left.node,
+          DEFAULT_VALUE: right.node,
+          PARAMETER_NAME: _core.types.cloneNode(paramName),
+          UNDEFINED: undefinedNode
+        }));
+        param.replaceWith(paramName);
+      }
+    } else if (paramIsAssignmentPattern) {
+      if (firstOptionalIndex === null) firstOptionalIndex = i;
+      const left = param.get("left");
+      const right = param.get("right");
+      const defNode = buildDefaultParam({
+        VARIABLE_NAME: left.node,
+        DEFAULT_VALUE: right.node,
+        ARGUMENT_KEY: _core.types.numericLiteral(i)
+      });
+      body.push(defNode);
+    } else if (firstOptionalIndex !== null) {
+      const defNode = buildSafeArgumentsAccess([param.node, _core.types.numericLiteral(i)]);
+      body.push(defNode);
+    } else if (param.isObjectPattern() || param.isArrayPattern()) {
+      const uid = path.scope.generateUidIdentifier("ref");
+      uid.typeAnnotation = param.node.typeAnnotation;
+      const defNode = _core.types.variableDeclaration("let", [_core.types.variableDeclarator(param.node, uid)]);
+      body.push(defNode);
+      param.replaceWith(_core.types.cloneNode(uid));
+    }
+    if (transformedRestNodes) {
+      for (const transformedNode of transformedRestNodes) {
+        body.push(transformedNode);
+      }
+    }
+  }
+  if (firstOptionalIndex !== null) {
+    node.params = node.params.slice(0, firstOptionalIndex);
+  }
+  path.ensureBlock();
+  const {
+    async,
+    generator
+  } = node;
+  if (generator || state.needsOuterBinding || shadowedParams.size > 0) {
+    body.push((0, _shadowUtils.buildScopeIIFE)(shadowedParams, path.node.body));
+    path.set("body", _core.types.blockStatement(body));
+    const bodyPath = path.get("body.body");
+    const arrowPath = bodyPath[bodyPath.length - 1].get("argument.callee");
+    arrowPath.arrowFunctionToExpression();
+    arrowPath.node.generator = generator;
+    arrowPath.node.async = async;
+    node.generator = false;
+    node.async = false;
+    if (async) {
+      path.node.body = _core.template.statement.ast`{
+        try {
+          ${path.node.body.body}
+        } catch (e) {
+          return Promise.reject(e);
+        }
+      }`;
+    }
+  } else {
+    path.get("body").unshiftContainer("body", body);
+  }
+  return true;
+}
+
+//# sourceMappingURL=params.js.map