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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": "TSUnionType",
14              "types": [
15                {
16                  "type": "TSTypeLiteral",
17                  "members": [
18                    {
19                      "type": "TSPropertySignature",
20                      "computed": false,
21                      "optional": false,
22                      "readonly": false,
23                      "key": {
24                        "type": "Identifier",
25                        "name": "a",
26                        "decorators": [],
27                        "loc": {
28                          "start": {
29                            "line": 17,
30                            "column": 10
31                          },
32                          "end": {
33                            "line": 17,
34                            "column": 11
35                          }
36                        }
37                      },
38                      "typeAnnotation": {
39                        "type": "TSNumberKeyword",
40                        "loc": {
41                          "start": {
42                            "line": 17,
43                            "column": 13
44                          },
45                          "end": {
46                            "line": 17,
47                            "column": 19
48                          }
49                        }
50                      },
51                      "loc": {
52                        "start": {
53                          "line": 17,
54                          "column": 10
55                        },
56                        "end": {
57                          "line": 17,
58                          "column": 20
59                        }
60                      }
61                    },
62                    {
63                      "type": "TSPropertySignature",
64                      "computed": false,
65                      "optional": false,
66                      "readonly": false,
67                      "key": {
68                        "type": "Identifier",
69                        "name": "b",
70                        "decorators": [],
71                        "loc": {
72                          "start": {
73                            "line": 17,
74                            "column": 21
75                          },
76                          "end": {
77                            "line": 17,
78                            "column": 22
79                          }
80                        }
81                      },
82                      "typeAnnotation": {
83                        "type": "TSStringKeyword",
84                        "loc": {
85                          "start": {
86                            "line": 17,
87                            "column": 24
88                          },
89                          "end": {
90                            "line": 17,
91                            "column": 30
92                          }
93                        }
94                      },
95                      "loc": {
96                        "start": {
97                          "line": 17,
98                          "column": 21
99                        },
100                        "end": {
101                          "line": 17,
102                          "column": 32
103                        }
104                      }
105                    }
106                  ],
107                  "loc": {
108                    "start": {
109                      "line": 17,
110                      "column": 8
111                    },
112                    "end": {
113                      "line": 17,
114                      "column": 32
115                    }
116                  }
117                },
118                {
119                  "type": "TSTypeLiteral",
120                  "members": [
121                    {
122                      "type": "TSPropertySignature",
123                      "computed": false,
124                      "optional": false,
125                      "readonly": false,
126                      "key": {
127                        "type": "Identifier",
128                        "name": "a",
129                        "decorators": [],
130                        "loc": {
131                          "start": {
132                            "line": 17,
133                            "column": 37
134                          },
135                          "end": {
136                            "line": 17,
137                            "column": 38
138                          }
139                        }
140                      },
141                      "typeAnnotation": {
142                        "type": "TSStringKeyword",
143                        "loc": {
144                          "start": {
145                            "line": 17,
146                            "column": 40
147                          },
148                          "end": {
149                            "line": 17,
150                            "column": 46
151                          }
152                        }
153                      },
154                      "loc": {
155                        "start": {
156                          "line": 17,
157                          "column": 37
158                        },
159                        "end": {
160                          "line": 17,
161                          "column": 47
162                        }
163                      }
164                    },
165                    {
166                      "type": "TSPropertySignature",
167                      "computed": false,
168                      "optional": false,
169                      "readonly": false,
170                      "key": {
171                        "type": "Identifier",
172                        "name": "b",
173                        "decorators": [],
174                        "loc": {
175                          "start": {
176                            "line": 17,
177                            "column": 48
178                          },
179                          "end": {
180                            "line": 17,
181                            "column": 49
182                          }
183                        }
184                      },
185                      "typeAnnotation": {
186                        "type": "TSNumberKeyword",
187                        "loc": {
188                          "start": {
189                            "line": 17,
190                            "column": 51
191                          },
192                          "end": {
193                            "line": 17,
194                            "column": 57
195                          }
196                        }
197                      },
198                      "loc": {
199                        "start": {
200                          "line": 17,
201                          "column": 48
202                        },
203                        "end": {
204                          "line": 17,
205                          "column": 59
206                        }
207                      }
208                    }
209                  ],
210                  "loc": {
211                    "start": {
212                      "line": 17,
213                      "column": 35
214                    },
215                    "end": {
216                      "line": 17,
217                      "column": 59
218                    }
219                  }
220                }
221              ],
222              "loc": {
223                "start": {
224                  "line": 17,
225                  "column": 8
226                },
227                "end": {
228                  "line": 17,
229                  "column": 59
230                }
231              }
232            },
233            "decorators": [],
234            "loc": {
235              "start": {
236                "line": 17,
237                "column": 5
238              },
239              "end": {
240                "line": 17,
241                "column": 6
242              }
243            }
244          },
245          "init": {
246            "type": "ObjectExpression",
247            "properties": [
248              {
249                "type": "Property",
250                "method": false,
251                "shorthand": false,
252                "computed": false,
253                "key": {
254                  "type": "Identifier",
255                  "name": "a",
256                  "decorators": [],
257                  "loc": {
258                    "start": {
259                      "line": 17,
260                      "column": 64
261                    },
262                    "end": {
263                      "line": 17,
264                      "column": 65
265                    }
266                  }
267                },
268                "value": {
269                  "type": "BooleanLiteral",
270                  "value": true,
271                  "loc": {
272                    "start": {
273                      "line": 17,
274                      "column": 67
275                    },
276                    "end": {
277                      "line": 17,
278                      "column": 71
279                    }
280                  }
281                },
282                "kind": "init",
283                "loc": {
284                  "start": {
285                    "line": 17,
286                    "column": 64
287                  },
288                  "end": {
289                    "line": 17,
290                    "column": 71
291                  }
292                }
293              }
294            ],
295            "loc": {
296              "start": {
297                "line": 17,
298                "column": 62
299              },
300              "end": {
301                "line": 17,
302                "column": 73
303              }
304            }
305          },
306          "loc": {
307            "start": {
308              "line": 17,
309              "column": 5
310            },
311            "end": {
312              "line": 17,
313              "column": 73
314            }
315          }
316        }
317      ],
318      "kind": "var",
319      "loc": {
320        "start": {
321          "line": 17,
322          "column": 1
323        },
324        "end": {
325          "line": 17,
326          "column": 74
327        }
328      }
329    }
330  ],
331  "loc": {
332    "start": {
333      "line": 1,
334      "column": 1
335    },
336    "end": {
337      "line": 17,
338      "column": 74
339    }
340  }
341}
342TypeError: Type 'boolean' is not assignable to type 'number | string'. [objectLiteralAssignability6.ts:17:64]
343