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rOACCT/node_modules/@babel/plugin-transform-parameters/lib/shadow-utils.js.map
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{
"version": 3,
"names": [
"iifeVisitor",
"path",
"state",
"scope",
"node",
"name",
"getBinding",
"parent",
"hasOwnBinding",
"needsOuterBinding",
"stop",
"skip",
"collectShadowedParamsNames",
"param",
"functionScope",
"shadowedParams",
"Object",
"keys",
"getBindingIdentifiers",
"constantViolations",
"bindings",
"redeclarator",
"type",
"init",
"declaration",
"parentPath",
"isFor",
"get",
"remove",
"add",
"buildScopeIIFE",
"body",
"args",
"params",
"push",
"t",
"identifier",
"returnStatement",
"callExpression",
"arrowFunctionExpression"
],
"sources": [
"../src/shadow-utils.ts"
],
"sourcesContent": [
"import { types as t } from \"@babel/core\";\nimport type { NodePath, Scope, Visitor } from \"@babel/traverse\";\n\ntype State = {\n needsOuterBinding: boolean;\n scope: Scope;\n};\n\nexport const iifeVisitor: Visitor<State> = {\n \"ReferencedIdentifier|BindingIdentifier\"(\n path: NodePath<t.Identifier>,\n state,\n ) {\n const { scope, node } = path;\n const { name } = node;\n\n if (\n name === \"eval\" ||\n (scope.getBinding(name) === state.scope.parent.getBinding(name) &&\n state.scope.hasOwnBinding(name))\n ) {\n state.needsOuterBinding = true;\n path.stop();\n }\n },\n // type annotations don't use or introduce \"real\" bindings\n \"TypeAnnotation|TSTypeAnnotation|TypeParameterDeclaration|TSTypeParameterDeclaration\":\n (path: NodePath) => path.skip(),\n};\n\nexport function collectShadowedParamsNames(\n param: NodePath<t.Function[\"params\"][number]>,\n functionScope: Scope,\n shadowedParams: Set<string>,\n) {\n for (const name of Object.keys(param.getBindingIdentifiers())) {\n const constantViolations = functionScope.bindings[name]?.constantViolations;\n if (constantViolations) {\n for (const redeclarator of constantViolations) {\n const node = redeclarator.node;\n // If a constant violation is a var or a function declaration,\n // we first check to see if it's a var without an init.\n // If so, we remove that declarator.\n // Otherwise, we have to wrap it in an IIFE.\n switch (node.type) {\n case \"VariableDeclarator\": {\n if (node.init === null) {\n const declaration = redeclarator.parentPath;\n // The following uninitialized var declarators should not be removed\n // for (var x in {})\n // for (var x;;)\n if (\n !declaration.parentPath.isFor() ||\n declaration.parentPath.get(\"body\") === declaration\n ) {\n redeclarator.remove();\n break;\n }\n }\n\n shadowedParams.add(name);\n break;\n }\n case \"FunctionDeclaration\":\n shadowedParams.add(name);\n break;\n }\n }\n }\n }\n}\n\nexport function buildScopeIIFE(\n shadowedParams: Set<string>,\n body: t.BlockStatement,\n) {\n const args = [];\n const params = [];\n\n for (const name of shadowedParams) {\n // We create them twice; the other option is to use t.cloneNode\n args.push(t.identifier(name));\n params.push(t.identifier(name));\n }\n\n return t.returnStatement(\n t.callExpression(t.arrowFunctionExpression(params, body), args),\n );\n}\n"
],
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}
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