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							202 lines
						
					
					
						
							4.5 KiB
						
					
					
				
			
		
		
	
	
							202 lines
						
					
					
						
							4.5 KiB
						
					
					
				"use strict";
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Object.defineProperty(exports, "__esModule", {
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  value: true
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});
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exports.default = _default;
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var _template = require("@babel/template");
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var _t = require("@babel/types");
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const {
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  NOT_LOCAL_BINDING,
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  cloneNode,
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  identifier,
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  isAssignmentExpression,
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  isAssignmentPattern,
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  isFunction,
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  isIdentifier,
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  isLiteral,
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  isNullLiteral,
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  isObjectMethod,
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  isObjectProperty,
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  isRegExpLiteral,
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  isRestElement,
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  isTemplateLiteral,
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  isVariableDeclarator,
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  toBindingIdentifierName
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} = _t;
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function getFunctionArity(node) {
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  const count = node.params.findIndex(param => isAssignmentPattern(param) || isRestElement(param));
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  return count === -1 ? node.params.length : count;
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}
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const buildPropertyMethodAssignmentWrapper = _template.default.statement(`
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  (function (FUNCTION_KEY) {
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    function FUNCTION_ID() {
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      return FUNCTION_KEY.apply(this, arguments);
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    }
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    FUNCTION_ID.toString = function () {
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      return FUNCTION_KEY.toString();
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    }
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    return FUNCTION_ID;
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  })(FUNCTION)
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`);
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const buildGeneratorPropertyMethodAssignmentWrapper = _template.default.statement(`
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  (function (FUNCTION_KEY) {
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    function* FUNCTION_ID() {
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      return yield* FUNCTION_KEY.apply(this, arguments);
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    }
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    FUNCTION_ID.toString = function () {
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      return FUNCTION_KEY.toString();
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    };
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    return FUNCTION_ID;
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  })(FUNCTION)
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`);
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const visitor = {
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  "ReferencedIdentifier|BindingIdentifier"(path, state) {
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    if (path.node.name !== state.name) return;
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    const localDeclar = path.scope.getBindingIdentifier(state.name);
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    if (localDeclar !== state.outerDeclar) return;
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    state.selfReference = true;
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    path.stop();
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  }
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};
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function getNameFromLiteralId(id) {
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  if (isNullLiteral(id)) {
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    return "null";
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  }
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  if (isRegExpLiteral(id)) {
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    return `_${id.pattern}_${id.flags}`;
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  }
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  if (isTemplateLiteral(id)) {
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    return id.quasis.map(quasi => quasi.value.raw).join("");
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  }
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  if (id.value !== undefined) {
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    return id.value + "";
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  }
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  return "";
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}
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function wrap(state, method, id, scope) {
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  if (state.selfReference) {
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    if (scope.hasBinding(id.name) && !scope.hasGlobal(id.name)) {
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      scope.rename(id.name);
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    } else {
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      if (!isFunction(method)) return;
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      let build = buildPropertyMethodAssignmentWrapper;
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      if (method.generator) {
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        build = buildGeneratorPropertyMethodAssignmentWrapper;
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      }
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      const template = build({
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        FUNCTION: method,
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        FUNCTION_ID: id,
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        FUNCTION_KEY: scope.generateUidIdentifier(id.name)
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      }).expression;
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      const params = template.callee.body.body[0].params;
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      for (let i = 0, len = getFunctionArity(method); i < len; i++) {
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        params.push(scope.generateUidIdentifier("x"));
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      }
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      return template;
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    }
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  }
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  method.id = id;
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  scope.getProgramParent().references[id.name] = true;
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}
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function visit(node, name, scope) {
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  const state = {
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    selfAssignment: false,
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    selfReference: false,
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    outerDeclar: scope.getBindingIdentifier(name),
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    name: name
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  };
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  const binding = scope.getOwnBinding(name);
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  if (binding) {
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    if (binding.kind === "param") {
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      state.selfReference = true;
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    } else {}
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  } else if (state.outerDeclar || scope.hasGlobal(name)) {
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    scope.traverse(node, visitor, state);
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  }
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  return state;
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}
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function _default({
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  node,
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  parent,
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  scope,
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  id
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}, localBinding = false, supportUnicodeId = false) {
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  if (node.id) return;
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  if ((isObjectProperty(parent) || isObjectMethod(parent, {
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    kind: "method"
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  })) && (!parent.computed || isLiteral(parent.key))) {
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    id = parent.key;
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  } else if (isVariableDeclarator(parent)) {
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    id = parent.id;
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    if (isIdentifier(id) && !localBinding) {
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      const binding = scope.parent.getBinding(id.name);
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      if (binding && binding.constant && scope.getBinding(id.name) === binding) {
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        node.id = cloneNode(id);
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        node.id[NOT_LOCAL_BINDING] = true;
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        return;
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      }
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    }
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  } else if (isAssignmentExpression(parent, {
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    operator: "="
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  })) {
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    id = parent.left;
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  } else if (!id) {
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    return;
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  }
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  let name;
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  if (id && isLiteral(id)) {
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    name = getNameFromLiteralId(id);
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  } else if (id && isIdentifier(id)) {
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    name = id.name;
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  }
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  if (name === undefined) {
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    return;
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  }
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  if (!supportUnicodeId && isFunction(node) && /[\uD800-\uDFFF]/.test(name)) {
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    return;
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  }
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  name = toBindingIdentifierName(name);
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  const newId = identifier(name);
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  newId[NOT_LOCAL_BINDING] = true;
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  const state = visit(node, name, scope);
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  return wrap(state, node, newId, scope) || node;
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}
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//# sourceMappingURL=index.js.map
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