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1{
2  "type": "Program",
3  "statements": [
4    {
5      "type": "VariableDeclaration",
6      "declarations": [
7        {
8          "type": "VariableDeclarator",
9          "id": {
10            "type": "Identifier",
11            "name": "a",
12            "typeAnnotation": {
13              "type": "TSBooleanKeyword",
14              "loc": {
15                "start": {
16                  "line": 17,
17                  "column": 8
18                },
19                "end": {
20                  "line": 17,
21                  "column": 15
22                }
23              }
24            },
25            "decorators": [],
26            "loc": {
27              "start": {
28                "line": 17,
29                "column": 5
30              },
31              "end": {
32                "line": 17,
33                "column": 6
34              }
35            }
36          },
37          "init": null,
38          "loc": {
39            "start": {
40              "line": 17,
41              "column": 5
42            },
43            "end": {
44              "line": 17,
45              "column": 6
46            }
47          }
48        }
49      ],
50      "kind": "var",
51      "loc": {
52        "start": {
53          "line": 17,
54          "column": 1
55        },
56        "end": {
57          "line": 17,
58          "column": 16
59        }
60      }
61    },
62    {
63      "type": "ExpressionStatement",
64      "expression": {
65        "type": "AssignmentExpression",
66        "operator": "=",
67        "left": {
68          "type": "Identifier",
69          "name": "a",
70          "decorators": [],
71          "loc": {
72            "start": {
73              "line": 18,
74              "column": 1
75            },
76            "end": {
77              "line": 18,
78              "column": 2
79            }
80          }
81        },
82        "right": {
83          "type": "BooleanLiteral",
84          "value": false,
85          "loc": {
86            "start": {
87              "line": 18,
88              "column": 5
89            },
90            "end": {
91              "line": 18,
92              "column": 10
93            }
94          }
95        },
96        "loc": {
97          "start": {
98            "line": 18,
99            "column": 1
100          },
101          "end": {
102            "line": 18,
103            "column": 10
104          }
105        }
106      },
107      "loc": {
108        "start": {
109          "line": 18,
110          "column": 1
111        },
112        "end": {
113          "line": 18,
114          "column": 11
115        }
116      }
117    },
118    {
119      "type": "VariableDeclaration",
120      "declarations": [
121        {
122          "type": "VariableDeclarator",
123          "id": {
124            "type": "Identifier",
125            "name": "b",
126            "typeAnnotation": {
127              "type": "TSAnyKeyword",
128              "loc": {
129                "start": {
130                  "line": 19,
131                  "column": 8
132                },
133                "end": {
134                  "line": 19,
135                  "column": 11
136                }
137              }
138            },
139            "decorators": [],
140            "loc": {
141              "start": {
142                "line": 19,
143                "column": 5
144              },
145              "end": {
146                "line": 19,
147                "column": 6
148              }
149            }
150          },
151          "init": null,
152          "loc": {
153            "start": {
154              "line": 19,
155              "column": 5
156            },
157            "end": {
158              "line": 19,
159              "column": 6
160            }
161          }
162        }
163      ],
164      "kind": "var",
165      "loc": {
166        "start": {
167          "line": 19,
168          "column": 1
169        },
170        "end": {
171          "line": 19,
172          "column": 12
173        }
174      }
175    },
176    {
177      "type": "ExpressionStatement",
178      "expression": {
179        "type": "BinaryExpression",
180        "operator": "instanceof",
181        "left": {
182          "type": "Identifier",
183          "name": "a",
184          "decorators": [],
185          "loc": {
186            "start": {
187              "line": 20,
188              "column": 1
189            },
190            "end": {
191              "line": 20,
192              "column": 2
193            }
194          }
195        },
196        "right": {
197          "type": "Identifier",
198          "name": "b",
199          "decorators": [],
200          "loc": {
201            "start": {
202              "line": 20,
203              "column": 14
204            },
205            "end": {
206              "line": 20,
207              "column": 15
208            }
209          }
210        },
211        "loc": {
212          "start": {
213            "line": 20,
214            "column": 1
215          },
216          "end": {
217            "line": 20,
218            "column": 15
219          }
220        }
221      },
222      "loc": {
223        "start": {
224          "line": 20,
225          "column": 1
226        },
227        "end": {
228          "line": 20,
229          "column": 16
230        }
231      }
232    }
233  ],
234  "loc": {
235    "start": {
236      "line": 1,
237      "column": 1
238    },
239    "end": {
240      "line": 21,
241      "column": 1
242    }
243  }
244}
245TypeError: The left-hand side of an 'instanceof' expression must be of type 'any', an object type or a type parameter. [instanceof_8.ts:20:1]
246