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{"version":3,"names":["_core","require","_shadowUtils","buildRest","template","statement","restIndex","expression","restIndexImpure","restLength","referencesRest","path","state","node","name","scope","bindingIdentifierEquals","outerBinding","memberExpressionOptimisationVisitor","Scope","skip","Flow","isTypeCastExpression","Function","oldNoOptimise","noOptimise","traverse","ReferencedIdentifier","deopted","parentPath","listKey","key","offset","isMemberExpression","object","grandparentPath","argsOptEligible","isAssignmentExpression","left","isLVal","isForXStatement","isUpdateExpression","isUnaryExpression","operator","isCallExpression","isNewExpression","callee","computed","get","isBaseType","candidates","push","cause","property","isSpreadElement","call","arguments","length","references","BindingIdentifier","getParamsCount","count","params","t","isIdentifier","hasRest","isRestElement","optimiseIndexGetter","argsId","offsetLiteral","numericLiteral","index","parent","isNumericLiteral","value","binaryExpression","cloneNode","isPure","temp","generateUidIdentifierBasedOnNode","id","kind","replaceWith","ARGUMENTS","OFFSET","INDEX","REF","replacedParentPath","offsetTestPath","valRes","evaluate","confident","buildUndefinedNode","optimiseLengthGetter","convertFunctionRest","restPath","shadowedParams","Set","collectShadowedParamsNames","needsIIFE","size","needsOuterBinding","iifeVisitor","ensureBlock","set","blockStatement","buildScopeIIFE","body","rest","pop","isPattern","pattern","generateUidIdentifier","declar","variableDeclaration","variableDeclarator","unshift","rename","identifier","paramsCount","argumentsNode","getBindingIdentifier","clonedArgsId","map","start","len","arrKey","arrLen","conditionalExpression","loop","ARRAY_KEY","ARRAY_LEN","START","ARRAY","KEY","LEN","target","getEarliestCommonAncestorFrom","getStatementParent","findParent","isLoop","isFunction","insertBefore"],"sources":["../src/rest.ts"],"sourcesContent":["import { template, types as t } from \"@babel/core\";\nimport type { NodePath, Visitor } from \"@babel/traverse\";\n\nimport {\n iifeVisitor,\n collectShadowedParamsNames,\n buildScopeIIFE,\n} from \"./shadow-utils.ts\";\n\nconst buildRest = template.statement(`\n for (var LEN = ARGUMENTS.length,\n ARRAY = new Array(ARRAY_LEN),\n KEY = START;\n KEY < LEN;\n KEY++) {\n ARRAY[ARRAY_KEY] = ARGUMENTS[KEY];\n }\n`);\n\nconst restIndex = template.expression(`\n (INDEX < OFFSET || ARGUMENTS.length <= INDEX) ? undefined : ARGUMENTS[INDEX]\n`);\n\nconst restIndexImpure = template.expression(`\n REF = INDEX, (REF < OFFSET || ARGUMENTS.length <= REF) ? undefined : ARGUMENTS[REF]\n`);\n\nconst restLength = template.expression(`\n ARGUMENTS.length <= OFFSET ? 0 : ARGUMENTS.length - OFFSET\n`);\n\nfunction referencesRest(\n path: NodePath<t.Identifier | t.JSXIdentifier>,\n state: State,\n) {\n if (path.node.name === state.name) {\n // Check rest parameter is not shadowed by a binding in another scope.\n return path.scope.bindingIdentifierEquals(state.name, state.outerBinding);\n }\n\n return false;\n}\n\ntype Candidate = {\n cause: \"argSpread\" | \"indexGetter\" | \"lengthGetter\";\n path: NodePath<t.Identifier | t.JSXIdentifier>;\n};\n\ntype State = {\n references: NodePath<t.Identifier | t.JSXIdentifier>[];\n offset: number;\n\n argumentsNode: t.Identifier;\n outerBinding: t.Identifier;\n\n // candidate member expressions we could optimise if there are no other references\n candidates: Candidate[];\n\n // local rest binding name\n name: string;\n\n /*\n It may be possible to optimize the output code in certain ways, such as\n not generating code to initialize an array (perhaps substituting direct\n references to arguments[i] or arguments.length for reads of the\n corresponding rest parameter property) or positioning the initialization\n code so that it may not have to execute depending on runtime conditions.\n\n This property tracks eligibility for optimization. \"deopted\" means give up\n and don't perform optimization. For example, when any of
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