{ "type": "Script", "span": { "start": 2, "end": 217, "ctxt": 0 }, "body": [ { "type": "TsTypeAliasDeclaration", "span": { "start": 2, "end": 21, "ctxt": 0 }, "declare": false, "id": { "type": "Identifier", "span": { "start": 7, "end": 8, "ctxt": 0 }, "value": "S", "optional": false }, "typeParams": null, "typeAnnotation": { "type": "TsUnionType", "span": { "start": 11, "end": 20, "ctxt": 0 }, "types": [ { "type": "TsLiteralType", "span": { "start": 11, "end": 14, "ctxt": 0 }, "literal": { "type": "StringLiteral", "span": { "start": 11, "end": 14, "ctxt": 0 }, "value": "a", "raw": "\"a\"" } }, { "type": "TsLiteralType", "span": { "start": 17, "end": 20, "ctxt": 0 }, "literal": { "type": "StringLiteral", "span": { "start": 17, "end": 20, "ctxt": 0 }, "value": "b", "raw": "\"b\"" } } ] } }, { "type": "TsTypeAliasDeclaration", "span": { "start": 22, "end": 39, "ctxt": 0 }, "declare": false, "id": { "type": "Identifier", "span": { "start": 27, "end": 28, "ctxt": 0 }, "value": "T", "optional": false }, "typeParams": null, "typeAnnotation": { "type": "TsUnionType", "span": { "start": 31, "end": 38, "ctxt": 0 }, "types": [ { "type": "TsArrayType", "span": { "start": 31, "end": 34, "ctxt": 0 }, "elemType": { "type": "TsTypeReference", "span": { "start": 31, "end": 32, "ctxt": 0 }, "typeName": { "type": "Identifier", "span": { "start": 31, "end": 32, "ctxt": 0 }, "value": "S", "optional": false }, "typeParams": null } }, { "type": "TsTypeReference", "span": { "start": 37, "end": 38, "ctxt": 0 }, "typeName": { "type": "Identifier", "span": { "start": 37, "end": 38, "ctxt": 0 }, "value": "S", "optional": false }, "typeParams": null } ] } }, { "type": "FunctionDeclaration", "identifier": { "type": "Identifier", "span": { "start": 50, "end": 53, "ctxt": 0 }, "value": "isS", "optional": false }, "declare": false, "params": [ { "type": "Parameter", "span": { "start": 54, "end": 58, "ctxt": 0 }, "decorators": [], "pat": { "type": "Identifier", "span": { "start": 54, "end": 58, "ctxt": 0 }, "value": "t", "optional": false, "typeAnnotation": { "type": "TsTypeAnnotation", "span": { "start": 55, "end": 58, "ctxt": 0 }, "typeAnnotation": { "type": "TsTypeReference", "span": { "start": 57, "end": 58, "ctxt": 0 }, "typeName": { "type": "Identifier", "span": { "start": 57, "end": 58, "ctxt": 0 }, "value": "T", "optional": false }, "typeParams": null } } } } ], "decorators": [], "span": { "start": 41, "end": 106, "ctxt": 0 }, "body": { "type": "BlockStatement", "span": { "start": 68, "end": 106, "ctxt": 0 }, "stmts": [ { "type": "ReturnStatement", "span": { "start": 74, "end": 104, "ctxt": 0 }, "argument": { "type": "BinaryExpression", "span": { "start": 81, "end": 103, "ctxt": 0 }, "operator": "||", "left": { "type": "BinaryExpression", "span": { "start": 81, "end": 90, "ctxt": 0 }, "operator": "===", "left": { "type": "Identifier", "span": { "start": 81, "end": 82, "ctxt": 0 }, "value": "t", "optional": false }, "right": { "type": "StringLiteral", "span": { "start": 87, "end": 90, "ctxt": 0 }, "value": "a", "raw": "\"a\"" } }, "right": { "type": "BinaryExpression", "span": { "start": 94, "end": 103, "ctxt": 0 }, "operator": "===", "left": { "type": "Identifier", "span": { "start": 94, "end": 95, "ctxt": 0 }, "value": "t", "optional": false }, "right": { "type": "StringLiteral", "span": { "start": 100, "end": 103, "ctxt": 0 }, "value": "b", "raw": "\"b\"" } } } } ] }, "generator": false, "async": false, "typeParameters": null, "returnType": { "type": "TsTypeAnnotation", "span": { "start": 59, "end": 67, "ctxt": 0 }, "typeAnnotation": { "type": "TsTypePredicate", "span": { "start": 61, "end": 67, "ctxt": 0 }, "asserts": false, "paramName": { "type": "Identifier", "span": { "start": 61, "end": 62, "ctxt": 0 }, "value": "t", "optional": false }, "typeAnnotation": { "type": "TsTypeAnnotation", "span": { "start": 66, "end": 67, "ctxt": 0 }, "typeAnnotation": { "type": "TsTypeReference", "span": { "start": 66, "end": 67, "ctxt": 0 }, "typeName": { "type": "Identifier", "span": { "start": 66, "end": 67, "ctxt": 0 }, "value": "S", "optional": false }, "typeParams": null } } } } }, { "type": "FunctionDeclaration", "identifier": { "type": "Identifier", "span": { "start": 117, "end": 118, "ctxt": 0 }, "value": "f", "optional": false }, "declare": false, "params": [ { "type": "Parameter", "span": { "start": 119, "end": 125, "ctxt": 0 }, "decorators": [], "pat": { "type": "Identifier", "span": { "start": 119, "end": 125, "ctxt": 0 }, "value": "foo", "optional": false, "typeAnnotation": { "type": "TsTypeAnnotation", "span": { "start": 122, "end": 125, "ctxt": 0 }, "typeAnnotation": { "type": "TsTypeReference", "span": { "start": 124, "end": 125, "ctxt": 0 }, "typeName": { "type": "Identifier", "span": { "start": 124, "end": 125, "ctxt": 0 }, "value": "T", "optional": false }, "typeParams": null } } } } ], "decorators": [], "span": { "start": 108, "end": 217, "ctxt": 0 }, "body": { "type": "BlockStatement", "span": { "start": 127, "end": 217, "ctxt": 0 }, "stmts": [ { "type": "IfStatement", "span": { "start": 133, "end": 215, "ctxt": 0 }, "test": { "type": "CallExpression", "span": { "start": 137, "end": 145, "ctxt": 0 }, "callee": { "type": "Identifier", "span": { "start": 137, "end": 140, "ctxt": 0 }, "value": "isS", "optional": false }, "arguments": [ { "spread": null, "expression": { "type": "Identifier", "span": { "start": 141, "end": 144, "ctxt": 0 }, "value": "foo", "optional": false } } ], "typeArguments": null }, "consequent": { "type": "BlockStatement", "span": { "start": 147, "end": 174, "ctxt": 0 }, "stmts": [ { "type": "ReturnStatement", "span": { "start": 157, "end": 168, "ctxt": 0 }, "argument": { "type": "Identifier", "span": { "start": 164, "end": 167, "ctxt": 0 }, "value": "foo", "optional": false } } ] }, "alternate": { "type": "BlockStatement", "span": { "start": 184, "end": 215, "ctxt": 0 }, "stmts": [ { "type": "ReturnStatement", "span": { "start": 195, "end": 209, "ctxt": 0 }, "argument": { "type": "MemberExpression", "span": { "start": 202, "end": 208, "ctxt": 0 }, "object": { "type": "Identifier", "span": { "start": 202, "end": 205, "ctxt": 0 }, "value": "foo", "optional": false }, "property": { "type": "Computed", "span": { "start": 205, "end": 208, "ctxt": 0 }, "expression": { "type": "NumericLiteral", "span": { "start": 206, "end": 207, "ctxt": 0 }, "value": 0.0, "raw": "0" } } } } ] } } ] }, "generator": false, "async": false, "typeParameters": null, "returnType": null } ], "interpreter": null }