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							77 lines
						
					
					
						
							1.9 KiB
						
					
					
				
			
		
		
	
	
							77 lines
						
					
					
						
							1.9 KiB
						
					
					
				"use strict"; | 
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 | 
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Object.defineProperty(exports, "__esModule", { | 
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  value: true | 
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}); | 
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exports.default = void 0; | 
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 | 
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var _helperPluginUtils = require("@babel/helper-plugin-utils"); | 
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 | 
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var _core = require("@babel/core"); | 
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 | 
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var _default = (0, _helperPluginUtils.declare)(api => { | 
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  api.assertVersion(7); | 
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  return { | 
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    name: "transform-new-target", | 
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    visitor: { | 
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      MetaProperty(path) { | 
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        const meta = path.get("meta"); | 
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        const property = path.get("property"); | 
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        const { | 
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          scope | 
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        } = path; | 
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 | 
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        if (meta.isIdentifier({ | 
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          name: "new" | 
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        }) && property.isIdentifier({ | 
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          name: "target" | 
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        })) { | 
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          const func = path.findParent(path => { | 
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            if (path.isClass()) return true; | 
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 | 
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            if (path.isFunction() && !path.isArrowFunctionExpression()) { | 
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              if (path.isClassMethod({ | 
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                kind: "constructor" | 
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              })) { | 
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                return false; | 
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              } | 
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 | 
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              return true; | 
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            } | 
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 | 
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            return false; | 
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          }); | 
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 | 
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          if (!func) { | 
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            throw path.buildCodeFrameError("new.target must be under a (non-arrow) function or a class."); | 
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          } | 
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 | 
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          const { | 
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            node | 
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          } = func; | 
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 | 
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          if (!node.id) { | 
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            if (func.isMethod()) { | 
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              path.replaceWith(scope.buildUndefinedNode()); | 
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              return; | 
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            } | 
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 | 
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            node.id = scope.generateUidIdentifier("target"); | 
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          } | 
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 | 
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          const constructor = _core.types.memberExpression(_core.types.thisExpression(), _core.types.identifier("constructor")); | 
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 | 
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          if (func.isClass()) { | 
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            path.replaceWith(constructor); | 
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            return; | 
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          } | 
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 | 
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          path.replaceWith(_core.types.conditionalExpression(_core.types.binaryExpression("instanceof", _core.types.thisExpression(), _core.types.cloneNode(node.id)), constructor, scope.buildUndefinedNode())); | 
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        } | 
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      } | 
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 | 
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    } | 
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  }; | 
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}); | 
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 | 
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exports.default = _default; |