From 2c90d9fa3aa5ebd7db697dddb7762bca2dd0e06b Mon Sep 17 00:00:00 2001
From: Brad Zacher <brad.zacher@gmail.com>
Date: Sat, 18 Jul 2020 18:45:53 -0700
Subject: [PATCH] feat(typescript-estree): support short-circuiting assignment
 operators (#2307)

---
 .../lib/__snapshots__/typescript.ts.snap      | 318 ++++++++++++++++++
 ...short-circuiting-assignment-and-and.src.ts |   1 +
 .../short-circuiting-assignment-or-or.src.ts  |   1 +
 ...uiting-assignment-question-question.src.ts |   1 +
 packages/types/src/ts-estree.ts               |  17 +
 .../tests/ast-alignment/parse.ts              |  15 +-
 .../semantic-diagnostics-enabled.test.ts.snap |   6 +
 ...-circuiting-assignment-and-and.src.ts.shot | 170 ++++++++++
 ...rt-circuiting-assignment-or-or.src.ts.shot | 170 ++++++++++
 ...g-assignment-question-question.src.ts.shot | 170 ++++++++++
 10 files changed, 862 insertions(+), 7 deletions(-)
 create mode 100644 packages/shared-fixtures/fixtures/typescript/basics/short-circuiting-assignment-and-and.src.ts
 create mode 100644 packages/shared-fixtures/fixtures/typescript/basics/short-circuiting-assignment-or-or.src.ts
 create mode 100644 packages/shared-fixtures/fixtures/typescript/basics/short-circuiting-assignment-question-question.src.ts
 create mode 100644 packages/typescript-estree/tests/snapshots/typescript/basics/short-circuiting-assignment-and-and.src.ts.shot
 create mode 100644 packages/typescript-estree/tests/snapshots/typescript/basics/short-circuiting-assignment-or-or.src.ts.shot
 create mode 100644 packages/typescript-estree/tests/snapshots/typescript/basics/short-circuiting-assignment-question-question.src.ts.shot

diff --git a/packages/parser/tests/lib/__snapshots__/typescript.ts.snap b/packages/parser/tests/lib/__snapshots__/typescript.ts.snap
index 1d7c6fd1725..8fb911f4d4a 100644
--- a/packages/parser/tests/lib/__snapshots__/typescript.ts.snap
+++ b/packages/parser/tests/lib/__snapshots__/typescript.ts.snap
@@ -31910,6 +31910,324 @@ Object {
 }
 `;
 
+exports[`typescript fixtures/basics/short-circuiting-assignment-and-and.src 1`] = `
+Object {
+  "$id": 3,
+  "block": Object {
+    "range": Array [
+      0,
+      9,
+    ],
+    "type": "Program",
+  },
+  "childScopes": Array [
+    Object {
+      "$id": 2,
+      "block": Object {
+        "range": Array [
+          0,
+          9,
+        ],
+        "type": "Program",
+      },
+      "childScopes": Array [],
+      "functionExpressionScope": false,
+      "isStrict": true,
+      "references": Array [
+        Object {
+          "$id": 0,
+          "from": Object {
+            "$ref": 2,
+          },
+          "identifier": Object {
+            "name": "a",
+            "range": Array [
+              0,
+              1,
+            ],
+            "type": "Identifier",
+          },
+          "kind": "rw",
+          "resolved": null,
+          "writeExpr": Object {
+            "name": "b",
+            "range": Array [
+              6,
+              7,
+            ],
+            "type": "Identifier",
+          },
+        },
+        Object {
+          "$id": 1,
+          "from": Object {
+            "$ref": 2,
+          },
+          "identifier": Object {
+            "name": "b",
+            "range": Array [
+              6,
+              7,
+            ],
+            "type": "Identifier",
+          },
+          "kind": "r",
+          "resolved": null,
+          "writeExpr": undefined,
+        },
+      ],
+      "throughReferences": Array [
+        Object {
+          "$ref": 0,
+        },
+        Object {
+          "$ref": 1,
+        },
+      ],
+      "type": "module",
+      "upperScope": Object {
+        "$ref": 3,
+      },
+      "variableMap": Object {},
+      "variableScope": Object {
+        "$ref": 2,
+      },
+      "variables": Array [],
+    },
+  ],
+  "functionExpressionScope": false,
+  "isStrict": false,
+  "references": Array [],
+  "throughReferences": Array [
+    Object {
+      "$ref": 0,
+    },
+    Object {
+      "$ref": 1,
+    },
+  ],
+  "type": "global",
+  "upperScope": null,
+  "variableMap": Object {},
+  "variableScope": Object {
+    "$ref": 3,
+  },
+  "variables": Array [],
+}
+`;
+
+exports[`typescript fixtures/basics/short-circuiting-assignment-or-or.src 1`] = `
+Object {
+  "$id": 3,
+  "block": Object {
+    "range": Array [
+      0,
+      9,
+    ],
+    "type": "Program",
+  },
+  "childScopes": Array [
+    Object {
+      "$id": 2,
+      "block": Object {
+        "range": Array [
+          0,
+          9,
+        ],
+        "type": "Program",
+      },
+      "childScopes": Array [],
+      "functionExpressionScope": false,
+      "isStrict": true,
+      "references": Array [
+        Object {
+          "$id": 0,
+          "from": Object {
+            "$ref": 2,
+          },
+          "identifier": Object {
+            "name": "a",
+            "range": Array [
+              0,
+              1,
+            ],
+            "type": "Identifier",
+          },
+          "kind": "rw",
+          "resolved": null,
+          "writeExpr": Object {
+            "name": "b",
+            "range": Array [
+              6,
+              7,
+            ],
+            "type": "Identifier",
+          },
+        },
+        Object {
+          "$id": 1,
+          "from": Object {
+            "$ref": 2,
+          },
+          "identifier": Object {
+            "name": "b",
+            "range": Array [
+              6,
+              7,
+            ],
+            "type": "Identifier",
+          },
+          "kind": "r",
+          "resolved": null,
+          "writeExpr": undefined,
+        },
+      ],
+      "throughReferences": Array [
+        Object {
+          "$ref": 0,
+        },
+        Object {
+          "$ref": 1,
+        },
+      ],
+      "type": "module",
+      "upperScope": Object {
+        "$ref": 3,
+      },
+      "variableMap": Object {},
+      "variableScope": Object {
+        "$ref": 2,
+      },
+      "variables": Array [],
+    },
+  ],
+  "functionExpressionScope": false,
+  "isStrict": false,
+  "references": Array [],
+  "throughReferences": Array [
+    Object {
+      "$ref": 0,
+    },
+    Object {
+      "$ref": 1,
+    },
+  ],
+  "type": "global",
+  "upperScope": null,
+  "variableMap": Object {},
+  "variableScope": Object {
+    "$ref": 3,
+  },
+  "variables": Array [],
+}
+`;
+
+exports[`typescript fixtures/basics/short-circuiting-assignment-question-question.src 1`] = `
+Object {
+  "$id": 3,
+  "block": Object {
+    "range": Array [
+      0,
+      9,
+    ],
+    "type": "Program",
+  },
+  "childScopes": Array [
+    Object {
+      "$id": 2,
+      "block": Object {
+        "range": Array [
+          0,
+          9,
+        ],
+        "type": "Program",
+      },
+      "childScopes": Array [],
+      "functionExpressionScope": false,
+      "isStrict": true,
+      "references": Array [
+        Object {
+          "$id": 0,
+          "from": Object {
+            "$ref": 2,
+          },
+          "identifier": Object {
+            "name": "a",
+            "range": Array [
+              0,
+              1,
+            ],
+            "type": "Identifier",
+          },
+          "kind": "rw",
+          "resolved": null,
+          "writeExpr": Object {
+            "name": "b",
+            "range": Array [
+              6,
+              7,
+            ],
+            "type": "Identifier",
+          },
+        },
+        Object {
+          "$id": 1,
+          "from": Object {
+            "$ref": 2,
+          },
+          "identifier": Object {
+            "name": "b",
+            "range": Array [
+              6,
+              7,
+            ],
+            "type": "Identifier",
+          },
+          "kind": "r",
+          "resolved": null,
+          "writeExpr": undefined,
+        },
+      ],
+      "throughReferences": Array [
+        Object {
+          "$ref": 0,
+        },
+        Object {
+          "$ref": 1,
+        },
+      ],
+      "type": "module",
+      "upperScope": Object {
+        "$ref": 3,
+      },
+      "variableMap": Object {},
+      "variableScope": Object {
+        "$ref": 2,
+      },
+      "variables": Array [],
+    },
+  ],
+  "functionExpressionScope": false,
+  "isStrict": false,
+  "references": Array [],
+  "throughReferences": Array [
+    Object {
+      "$ref": 0,
+    },
+    Object {
+      "$ref": 1,
+    },
+  ],
+  "type": "global",
+  "upperScope": null,
+  "variableMap": Object {},
+  "variableScope": Object {
+    "$ref": 3,
+  },
+  "variables": Array [],
+}
+`;
+
 exports[`typescript fixtures/basics/symbol-type-param.src 1`] = `
 Object {
   "$id": 5,
diff --git a/packages/shared-fixtures/fixtures/typescript/basics/short-circuiting-assignment-and-and.src.ts b/packages/shared-fixtures/fixtures/typescript/basics/short-circuiting-assignment-and-and.src.ts
new file mode 100644
index 00000000000..53c87792bb2
--- /dev/null
+++ b/packages/shared-fixtures/fixtures/typescript/basics/short-circuiting-assignment-and-and.src.ts
@@ -0,0 +1 @@
+a ||= b;
diff --git a/packages/shared-fixtures/fixtures/typescript/basics/short-circuiting-assignment-or-or.src.ts b/packages/shared-fixtures/fixtures/typescript/basics/short-circuiting-assignment-or-or.src.ts
new file mode 100644
index 00000000000..2747ba2b3e1
--- /dev/null
+++ b/packages/shared-fixtures/fixtures/typescript/basics/short-circuiting-assignment-or-or.src.ts
@@ -0,0 +1 @@
+a &&= b;
diff --git a/packages/shared-fixtures/fixtures/typescript/basics/short-circuiting-assignment-question-question.src.ts b/packages/shared-fixtures/fixtures/typescript/basics/short-circuiting-assignment-question-question.src.ts
new file mode 100644
index 00000000000..eddf7da5264
--- /dev/null
+++ b/packages/shared-fixtures/fixtures/typescript/basics/short-circuiting-assignment-question-question.src.ts
@@ -0,0 +1 @@
+a ??= b;
diff --git a/packages/types/src/ts-estree.ts b/packages/types/src/ts-estree.ts
index f268a38257b..b72a1f58b09 100644
--- a/packages/types/src/ts-estree.ts
+++ b/packages/types/src/ts-estree.ts
@@ -764,6 +764,23 @@ export interface ArrowFunctionExpression extends BaseNode {
 
 export interface AssignmentExpression extends BinaryExpressionBase {
   type: AST_NODE_TYPES.AssignmentExpression;
+  operator:
+    | '-='
+    | '??='
+    | '**='
+    | '*='
+    | '/='
+    | '&&='
+    | '&='
+    | '%='
+    | '^='
+    | '+='
+    | '<<='
+    | '='
+    | '>>='
+    | '>>>='
+    | '|='
+    | '||=';
 }
 
 export interface AssignmentPattern extends BaseNode {
diff --git a/packages/typescript-estree/tests/ast-alignment/parse.ts b/packages/typescript-estree/tests/ast-alignment/parse.ts
index cd9c2db02f8..0e24d6842bd 100644
--- a/packages/typescript-estree/tests/ast-alignment/parse.ts
+++ b/packages/typescript-estree/tests/ast-alignment/parse.ts
@@ -21,18 +21,19 @@ function createError(
 function parseWithBabelParser(text: string, jsx = true): any {
   const babel = require('@babel/parser');
   const plugins: ParserPlugin[] = [
-    'typescript',
-    'objectRestSpread',
-    'decorators-legacy',
-    'classProperties',
     'asyncGenerators',
+    'bigInt',
+    'classProperties',
+    'decorators-legacy',
     'dynamicImport',
     'estree',
-    'bigInt',
-    'numericSeparator',
     'importMeta',
-    'optionalChaining',
+    'logicalAssignment',
     'nullishCoalescingOperator',
+    'numericSeparator',
+    'objectRestSpread',
+    'optionalChaining',
+    'typescript',
   ];
   if (jsx) {
     plugins.push('jsx');
diff --git a/packages/typescript-estree/tests/lib/__snapshots__/semantic-diagnostics-enabled.test.ts.snap b/packages/typescript-estree/tests/lib/__snapshots__/semantic-diagnostics-enabled.test.ts.snap
index 6b681dda87a..57f10c4a034 100644
--- a/packages/typescript-estree/tests/lib/__snapshots__/semantic-diagnostics-enabled.test.ts.snap
+++ b/packages/typescript-estree/tests/lib/__snapshots__/semantic-diagnostics-enabled.test.ts.snap
@@ -2038,6 +2038,12 @@ exports[`Parse all fixtures with "errorOnTypeScriptSyntacticAndSemanticIssues" e
 
 exports[`Parse all fixtures with "errorOnTypeScriptSyntacticAndSemanticIssues" enabled fixtures/typescript/basics/readonly-tuples.src 1`] = `"TEST OUTPUT: No semantic or syntactic issues found"`;
 
+exports[`Parse all fixtures with "errorOnTypeScriptSyntacticAndSemanticIssues" enabled fixtures/typescript/basics/short-circuiting-assignment-and-and.src 1`] = `"TEST OUTPUT: No semantic or syntactic issues found"`;
+
+exports[`Parse all fixtures with "errorOnTypeScriptSyntacticAndSemanticIssues" enabled fixtures/typescript/basics/short-circuiting-assignment-or-or.src 1`] = `"TEST OUTPUT: No semantic or syntactic issues found"`;
+
+exports[`Parse all fixtures with "errorOnTypeScriptSyntacticAndSemanticIssues" enabled fixtures/typescript/basics/short-circuiting-assignment-question-question.src 1`] = `"TEST OUTPUT: No semantic or syntactic issues found"`;
+
 exports[`Parse all fixtures with "errorOnTypeScriptSyntacticAndSemanticIssues" enabled fixtures/typescript/basics/symbol-type-param.src 1`] = `"TEST OUTPUT: No semantic or syntactic issues found"`;
 
 exports[`Parse all fixtures with "errorOnTypeScriptSyntacticAndSemanticIssues" enabled fixtures/typescript/basics/type-alias-declaration.src 1`] = `"TEST OUTPUT: No semantic or syntactic issues found"`;
diff --git a/packages/typescript-estree/tests/snapshots/typescript/basics/short-circuiting-assignment-and-and.src.ts.shot b/packages/typescript-estree/tests/snapshots/typescript/basics/short-circuiting-assignment-and-and.src.ts.shot
new file mode 100644
index 00000000000..9cc451138fd
--- /dev/null
+++ b/packages/typescript-estree/tests/snapshots/typescript/basics/short-circuiting-assignment-and-and.src.ts.shot
@@ -0,0 +1,170 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`typescript basics short-circuiting-assignment-and-and.src 1`] = `
+Object {
+  "body": Array [
+    Object {
+      "expression": Object {
+        "left": Object {
+          "loc": Object {
+            "end": Object {
+              "column": 1,
+              "line": 1,
+            },
+            "start": Object {
+              "column": 0,
+              "line": 1,
+            },
+          },
+          "name": "a",
+          "range": Array [
+            0,
+            1,
+          ],
+          "type": "Identifier",
+        },
+        "loc": Object {
+          "end": Object {
+            "column": 7,
+            "line": 1,
+          },
+          "start": Object {
+            "column": 0,
+            "line": 1,
+          },
+        },
+        "operator": "||=",
+        "range": Array [
+          0,
+          7,
+        ],
+        "right": Object {
+          "loc": Object {
+            "end": Object {
+              "column": 7,
+              "line": 1,
+            },
+            "start": Object {
+              "column": 6,
+              "line": 1,
+            },
+          },
+          "name": "b",
+          "range": Array [
+            6,
+            7,
+          ],
+          "type": "Identifier",
+        },
+        "type": "AssignmentExpression",
+      },
+      "loc": Object {
+        "end": Object {
+          "column": 8,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "range": Array [
+        0,
+        8,
+      ],
+      "type": "ExpressionStatement",
+    },
+  ],
+  "comments": Array [],
+  "loc": Object {
+    "end": Object {
+      "column": 0,
+      "line": 2,
+    },
+    "start": Object {
+      "column": 0,
+      "line": 1,
+    },
+  },
+  "range": Array [
+    0,
+    9,
+  ],
+  "sourceType": "script",
+  "tokens": Array [
+    Object {
+      "loc": Object {
+        "end": Object {
+          "column": 1,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "range": Array [
+        0,
+        1,
+      ],
+      "type": "Identifier",
+      "value": "a",
+    },
+    Object {
+      "loc": Object {
+        "end": Object {
+          "column": 5,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 2,
+          "line": 1,
+        },
+      },
+      "range": Array [
+        2,
+        5,
+      ],
+      "type": "Punctuator",
+      "value": "||=",
+    },
+    Object {
+      "loc": Object {
+        "end": Object {
+          "column": 7,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 6,
+          "line": 1,
+        },
+      },
+      "range": Array [
+        6,
+        7,
+      ],
+      "type": "Identifier",
+      "value": "b",
+    },
+    Object {
+      "loc": Object {
+        "end": Object {
+          "column": 8,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 7,
+          "line": 1,
+        },
+      },
+      "range": Array [
+        7,
+        8,
+      ],
+      "type": "Punctuator",
+      "value": ";",
+    },
+  ],
+  "type": "Program",
+}
+`;
diff --git a/packages/typescript-estree/tests/snapshots/typescript/basics/short-circuiting-assignment-or-or.src.ts.shot b/packages/typescript-estree/tests/snapshots/typescript/basics/short-circuiting-assignment-or-or.src.ts.shot
new file mode 100644
index 00000000000..714a7e449b2
--- /dev/null
+++ b/packages/typescript-estree/tests/snapshots/typescript/basics/short-circuiting-assignment-or-or.src.ts.shot
@@ -0,0 +1,170 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`typescript basics short-circuiting-assignment-or-or.src 1`] = `
+Object {
+  "body": Array [
+    Object {
+      "expression": Object {
+        "left": Object {
+          "loc": Object {
+            "end": Object {
+              "column": 1,
+              "line": 1,
+            },
+            "start": Object {
+              "column": 0,
+              "line": 1,
+            },
+          },
+          "name": "a",
+          "range": Array [
+            0,
+            1,
+          ],
+          "type": "Identifier",
+        },
+        "loc": Object {
+          "end": Object {
+            "column": 7,
+            "line": 1,
+          },
+          "start": Object {
+            "column": 0,
+            "line": 1,
+          },
+        },
+        "operator": "&&=",
+        "range": Array [
+          0,
+          7,
+        ],
+        "right": Object {
+          "loc": Object {
+            "end": Object {
+              "column": 7,
+              "line": 1,
+            },
+            "start": Object {
+              "column": 6,
+              "line": 1,
+            },
+          },
+          "name": "b",
+          "range": Array [
+            6,
+            7,
+          ],
+          "type": "Identifier",
+        },
+        "type": "AssignmentExpression",
+      },
+      "loc": Object {
+        "end": Object {
+          "column": 8,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "range": Array [
+        0,
+        8,
+      ],
+      "type": "ExpressionStatement",
+    },
+  ],
+  "comments": Array [],
+  "loc": Object {
+    "end": Object {
+      "column": 0,
+      "line": 2,
+    },
+    "start": Object {
+      "column": 0,
+      "line": 1,
+    },
+  },
+  "range": Array [
+    0,
+    9,
+  ],
+  "sourceType": "script",
+  "tokens": Array [
+    Object {
+      "loc": Object {
+        "end": Object {
+          "column": 1,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "range": Array [
+        0,
+        1,
+      ],
+      "type": "Identifier",
+      "value": "a",
+    },
+    Object {
+      "loc": Object {
+        "end": Object {
+          "column": 5,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 2,
+          "line": 1,
+        },
+      },
+      "range": Array [
+        2,
+        5,
+      ],
+      "type": "Punctuator",
+      "value": "&&=",
+    },
+    Object {
+      "loc": Object {
+        "end": Object {
+          "column": 7,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 6,
+          "line": 1,
+        },
+      },
+      "range": Array [
+        6,
+        7,
+      ],
+      "type": "Identifier",
+      "value": "b",
+    },
+    Object {
+      "loc": Object {
+        "end": Object {
+          "column": 8,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 7,
+          "line": 1,
+        },
+      },
+      "range": Array [
+        7,
+        8,
+      ],
+      "type": "Punctuator",
+      "value": ";",
+    },
+  ],
+  "type": "Program",
+}
+`;
diff --git a/packages/typescript-estree/tests/snapshots/typescript/basics/short-circuiting-assignment-question-question.src.ts.shot b/packages/typescript-estree/tests/snapshots/typescript/basics/short-circuiting-assignment-question-question.src.ts.shot
new file mode 100644
index 00000000000..25a13976648
--- /dev/null
+++ b/packages/typescript-estree/tests/snapshots/typescript/basics/short-circuiting-assignment-question-question.src.ts.shot
@@ -0,0 +1,170 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`typescript basics short-circuiting-assignment-question-question.src 1`] = `
+Object {
+  "body": Array [
+    Object {
+      "expression": Object {
+        "left": Object {
+          "loc": Object {
+            "end": Object {
+              "column": 1,
+              "line": 1,
+            },
+            "start": Object {
+              "column": 0,
+              "line": 1,
+            },
+          },
+          "name": "a",
+          "range": Array [
+            0,
+            1,
+          ],
+          "type": "Identifier",
+        },
+        "loc": Object {
+          "end": Object {
+            "column": 7,
+            "line": 1,
+          },
+          "start": Object {
+            "column": 0,
+            "line": 1,
+          },
+        },
+        "operator": "??=",
+        "range": Array [
+          0,
+          7,
+        ],
+        "right": Object {
+          "loc": Object {
+            "end": Object {
+              "column": 7,
+              "line": 1,
+            },
+            "start": Object {
+              "column": 6,
+              "line": 1,
+            },
+          },
+          "name": "b",
+          "range": Array [
+            6,
+            7,
+          ],
+          "type": "Identifier",
+        },
+        "type": "AssignmentExpression",
+      },
+      "loc": Object {
+        "end": Object {
+          "column": 8,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "range": Array [
+        0,
+        8,
+      ],
+      "type": "ExpressionStatement",
+    },
+  ],
+  "comments": Array [],
+  "loc": Object {
+    "end": Object {
+      "column": 0,
+      "line": 2,
+    },
+    "start": Object {
+      "column": 0,
+      "line": 1,
+    },
+  },
+  "range": Array [
+    0,
+    9,
+  ],
+  "sourceType": "script",
+  "tokens": Array [
+    Object {
+      "loc": Object {
+        "end": Object {
+          "column": 1,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "range": Array [
+        0,
+        1,
+      ],
+      "type": "Identifier",
+      "value": "a",
+    },
+    Object {
+      "loc": Object {
+        "end": Object {
+          "column": 5,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 2,
+          "line": 1,
+        },
+      },
+      "range": Array [
+        2,
+        5,
+      ],
+      "type": "Punctuator",
+      "value": "??=",
+    },
+    Object {
+      "loc": Object {
+        "end": Object {
+          "column": 7,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 6,
+          "line": 1,
+        },
+      },
+      "range": Array [
+        6,
+        7,
+      ],
+      "type": "Identifier",
+      "value": "b",
+    },
+    Object {
+      "loc": Object {
+        "end": Object {
+          "column": 8,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 7,
+          "line": 1,
+        },
+      },
+      "range": Array [
+        7,
+        8,
+      ],
+      "type": "Punctuator",
+      "value": ";",
+    },
+  ],
+  "type": "Program",
+}
+`;