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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": "TSStringKeyword",
14              "loc": {
15                "start": {
16                  "line": 17,
17                  "column": 8
18                },
19                "end": {
20                  "line": 17,
21                  "column": 14
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": 15
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": "StringLiteral",
84          "value": "foo",
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": "ExpressionStatement",
120      "expression": {
121        "type": "UpdateExpression",
122        "operator": "--",
123        "prefix": false,
124        "argument": {
125          "type": "Identifier",
126          "name": "a",
127          "decorators": [],
128          "loc": {
129            "start": {
130              "line": 19,
131              "column": 1
132            },
133            "end": {
134              "line": 19,
135              "column": 2
136            }
137          }
138        },
139        "loc": {
140          "start": {
141            "line": 19,
142            "column": 1
143          },
144          "end": {
145            "line": 19,
146            "column": 4
147          }
148        }
149      },
150      "loc": {
151        "start": {
152          "line": 19,
153          "column": 1
154        },
155        "end": {
156          "line": 19,
157          "column": 5
158        }
159      }
160    }
161  ],
162  "loc": {
163    "start": {
164      "line": 1,
165      "column": 1
166    },
167    "end": {
168      "line": 20,
169      "column": 1
170    }
171  }
172}
173TypeError: An arithmetic operand must be of type 'any', 'number', 'bigint' or an enum type. [arithmetic_operators_17.ts:19:1]
174