swc/crates/swc_ecma_parser/tests/tsc/bivariantInferences.json

{
  "type": "Script",
  "span": {
    "start": 41,
    "end": 309,
    "ctxt": 0
  },
  "body": [
    {
      "type": "TsInterfaceDeclaration",
      "span": {
        "start": 41,
        "end": 143,
        "ctxt": 0
      },
      "id": {
        "type": "Identifier",
        "span": {
          "start": 51,
          "end": 56,
          "ctxt": 0
        },
        "value": "Array",
        "optional": false
      },
      "declare": false,
      "typeParams": {
        "type": "TsTypeParameterDeclaration",
        "span": {
          "start": 56,
          "end": 59,
          "ctxt": 0
        },
        "parameters": [
          {
            "type": "TsTypeParameter",
            "span": {
              "start": 57,
              "end": 58,
              "ctxt": 0
            },
            "name": {
              "type": "Identifier",
              "span": {
                "start": 57,
                "end": 58,
                "ctxt": 0
              },
              "value": "T",
              "optional": false
            },
            "in": false,
            "out": false,
            "constraint": null,
            "default": null
          }
        ]
      },
      "extends": [],
      "body": {
        "type": "TsInterfaceBody",
        "span": {
          "start": 60,
          "end": 143,
          "ctxt": 0
        },
        "body": [
          {
            "type": "TsMethodSignature",
            "span": {
              "start": 66,
              "end": 141,
              "ctxt": 0
            },
            "readonly": false,
            "key": {
              "type": "Identifier",
              "span": {
                "start": 66,
                "end": 79,
                "ctxt": 0
              },
              "value": "equalsShallow",
              "optional": false
            },
            "computed": false,
            "optional": false,
            "params": [
              {
                "type": "Identifier",
                "span": {
                  "start": 83,
                  "end": 105,
                  "ctxt": 0
                },
                "value": "this",
                "optional": false,
                "typeAnnotation": {
                  "type": "TsTypeAnnotation",
                  "span": {
                    "start": 87,
                    "end": 105,
                    "ctxt": 0
                  },
                  "typeAnnotation": {
                    "type": "TsTypeReference",
                    "span": {
                      "start": 89,
                      "end": 105,
                      "ctxt": 0
                    },
                    "typeName": {
                      "type": "Identifier",
                      "span": {
                        "start": 89,
                        "end": 102,
                        "ctxt": 0
                      },
                      "value": "ReadonlyArray",
                      "optional": false
                    },
                    "typeParams": {
                      "type": "TsTypeParameterInstantiation",
                      "span": {
                        "start": 102,
                        "end": 105,
                        "ctxt": 0
                      },
                      "params": [
                        {
                          "type": "TsTypeReference",
                          "span": {
                            "start": 103,
                            "end": 104,
                            "ctxt": 0
                          },
                          "typeName": {
                            "type": "Identifier",
                            "span": {
                              "start": 103,
                              "end": 104,
                              "ctxt": 0
                            },
                            "value": "T",
                            "optional": false
                          },
                          "typeParams": null
                        }
                      ]
                    }
                  }
                }
              },
              {
                "type": "Identifier",
                "span": {
                  "start": 107,
                  "end": 130,
                  "ctxt": 0
                },
                "value": "other",
                "optional": false,
                "typeAnnotation": {
                  "type": "TsTypeAnnotation",
                  "span": {
                    "start": 112,
                    "end": 130,
                    "ctxt": 0
                  },
                  "typeAnnotation": {
                    "type": "TsTypeReference",
                    "span": {
                      "start": 114,
                      "end": 130,
                      "ctxt": 0
                    },
                    "typeName": {
                      "type": "Identifier",
                      "span": {
                        "start": 114,
                        "end": 127,
                        "ctxt": 0
                      },
                      "value": "ReadonlyArray",
                      "optional": false
                    },
                    "typeParams": {
                      "type": "TsTypeParameterInstantiation",
                      "span": {
                        "start": 127,
                        "end": 130,
                        "ctxt": 0
                      },
                      "params": [
                        {
                          "type": "TsTypeReference",
                          "span": {
                            "start": 128,
                            "end": 129,
                            "ctxt": 0
                          },
                          "typeName": {
                            "type": "Identifier",
                            "span": {
                              "start": 128,
                              "end": 129,
                              "ctxt": 0
                            },
                            "value": "T",
                            "optional": false
                          },
                          "typeParams": null
                        }
                      ]
                    }
                  }
                }
              }
            ],
            "typeAnn": {
              "type": "TsTypeAnnotation",
              "span": {
                "start": 131,
                "end": 140,
                "ctxt": 0
              },
              "typeAnnotation": {
                "type": "TsKeywordType",
                "span": {
                  "start": 133,
                  "end": 140,
                  "ctxt": 0
                },
                "kind": "boolean"
              }
            },
            "typeParams": {
              "type": "TsTypeParameterDeclaration",
              "span": {
                "start": 79,
                "end": 82,
                "ctxt": 0
              },
              "parameters": [
                {
                  "type": "TsTypeParameter",
                  "span": {
                    "start": 80,
                    "end": 81,
                    "ctxt": 0
                  },
                  "name": {
                    "type": "Identifier",
                    "span": {
                      "start": 80,
                      "end": 81,
                      "ctxt": 0
                    },
                    "value": "T",
                    "optional": false
                  },
                  "in": false,
                  "out": false,
                  "constraint": null,
                  "default": null
                }
              ]
            }
          }
        ]
      }
    },
    {
      "type": "VariableDeclaration",
      "span": {
        "start": 145,
        "end": 212,
        "ctxt": 0
      },
      "kind": "const",
      "declare": true,
      "declarations": [
        {
          "type": "VariableDeclarator",
          "span": {
            "start": 159,
            "end": 211,
            "ctxt": 0
          },
          "id": {
            "type": "Identifier",
            "span": {
              "start": 159,
              "end": 160,
              "ctxt": 0
            },
            "value": "a",
            "optional": false,
            "typeAnnotation": {
              "type": "TsTypeAnnotation",
              "span": {
                "start": 160,
                "end": 211,
                "ctxt": 0
              },
              "typeAnnotation": {
                "type": "TsUnionType",
                "span": {
                  "start": 162,
                  "end": 211,
                  "ctxt": 0
                },
                "types": [
                  {
                    "type": "TsArrayType",
                    "span": {
                      "start": 162,
                      "end": 181,
                      "ctxt": 0
                    },
                    "elemType": {
                      "type": "TsParenthesizedType",
                      "span": {
                        "start": 162,
                        "end": 179,
                        "ctxt": 0
                      },
                      "typeAnnotation": {
                        "type": "TsUnionType",
                        "span": {
                          "start": 163,
                          "end": 178,
                          "ctxt": 0
                        },
                        "types": [
                          {
                            "type": "TsKeywordType",
                            "span": {
                              "start": 163,
                              "end": 169,
                              "ctxt": 0
                            },
                            "kind": "string"
                          },
                          {
                            "type": "TsKeywordType",
                            "span": {
                              "start": 172,
                              "end": 178,
                              "ctxt": 0
                            },
                            "kind": "number"
                          }
                        ]
                      }
                    }
                  },
                  {
                    "type": "TsArrayType",
                    "span": {
                      "start": 184,
                      "end": 190,
                      "ctxt": 0
                    },
                    "elemType": {
                      "type": "TsKeywordType",
                      "span": {
                        "start": 184,
                        "end": 188,
                        "ctxt": 0
                      },
                      "kind": "null"
                    }
                  },
                  {
                    "type": "TsArrayType",
                    "span": {
                      "start": 193,
                      "end": 204,
                      "ctxt": 0
                    },
                    "elemType": {
                      "type": "TsKeywordType",
                      "span": {
                        "start": 193,
                        "end": 202,
                        "ctxt": 0
                      },
                      "kind": "undefined"
                    }
                  },
                  {
                    "type": "TsArrayType",
                    "span": {
                      "start": 207,
                      "end": 211,
                      "ctxt": 0
                    },
                    "elemType": {
                      "type": "TsTypeLiteral",
                      "span": {
                        "start": 207,
                        "end": 209,
                        "ctxt": 0
                      },
                      "members": []
                    }
                  }
                ]
              }
            }
          },
          "init": null,
          "definite": false
        }
      ]
    },
    {
      "type": "VariableDeclaration",
      "span": {
        "start": 213,
        "end": 280,
        "ctxt": 0
      },
      "kind": "const",
      "declare": true,
      "declarations": [
        {
          "type": "VariableDeclarator",
          "span": {
            "start": 227,
            "end": 279,
            "ctxt": 0
          },
          "id": {
            "type": "Identifier",
            "span": {
              "start": 227,
              "end": 228,
              "ctxt": 0
            },
            "value": "b",
            "optional": false,
            "typeAnnotation": {
              "type": "TsTypeAnnotation",
              "span": {
                "start": 228,
                "end": 279,
                "ctxt": 0
              },
              "typeAnnotation": {
                "type": "TsUnionType",
                "span": {
                  "start": 230,
                  "end": 279,
                  "ctxt": 0
                },
                "types": [
                  {
                    "type": "TsArrayType",
                    "span": {
                      "start": 230,
                      "end": 249,
                      "ctxt": 0
                    },
                    "elemType": {
                      "type": "TsParenthesizedType",
                      "span": {
                        "start": 230,
                        "end": 247,
                        "ctxt": 0
                      },
                      "typeAnnotation": {
                        "type": "TsUnionType",
                        "span": {
                          "start": 231,
                          "end": 246,
                          "ctxt": 0
                        },
                        "types": [
                          {
                            "type": "TsKeywordType",
                            "span": {
                              "start": 231,
                              "end": 237,
                              "ctxt": 0
                            },
                            "kind": "string"
                          },
                          {
                            "type": "TsKeywordType",
                            "span": {
                              "start": 240,
                              "end": 246,
                              "ctxt": 0
                            },
                            "kind": "number"
                          }
                        ]
                      }
                    }
                  },
                  {
                    "type": "TsArrayType",
                    "span": {
                      "start": 252,
                      "end": 258,
                      "ctxt": 0
                    },
                    "elemType": {
                      "type": "TsKeywordType",
                      "span": {
                        "start": 252,
                        "end": 256,
                        "ctxt": 0
                      },
                      "kind": "null"
                    }
                  },
                  {
                    "type": "TsArrayType",
                    "span": {
                      "start": 261,
                      "end": 272,
                      "ctxt": 0
                    },
                    "elemType": {
                      "type": "TsKeywordType",
                      "span": {
                        "start": 261,
                        "end": 270,
                        "ctxt": 0
                      },
                      "kind": "undefined"
                    }
                  },
                  {
                    "type": "TsArrayType",
                    "span": {
                      "start": 275,
                      "end": 279,
                      "ctxt": 0
                    },
                    "elemType": {
                      "type": "TsTypeLiteral",
                      "span": {
                        "start": 275,
                        "end": 277,
                        "ctxt": 0
                      },
                      "members": []
                    }
                  }
                ]
              }
            }
          },
          "init": null,
          "definite": false
        }
      ]
    },
    {
      "type": "VariableDeclaration",
      "span": {
        "start": 282,
        "end": 309,
        "ctxt": 0
      },
      "kind": "let",
      "declare": false,
      "declarations": [
        {
          "type": "VariableDeclarator",
          "span": {
            "start": 286,
            "end": 308,
            "ctxt": 0
          },
          "id": {
            "type": "Identifier",
            "span": {
              "start": 286,
              "end": 287,
              "ctxt": 0
            },
            "value": "x",
            "optional": false,
            "typeAnnotation": null
          },
          "init": {
            "type": "CallExpression",
            "span": {
              "start": 290,
              "end": 308,
              "ctxt": 0
            },
            "callee": {
              "type": "MemberExpression",
              "span": {
                "start": 290,
                "end": 305,
                "ctxt": 0
              },
              "object": {
                "type": "Identifier",
                "span": {
                  "start": 290,
                  "end": 291,
                  "ctxt": 0
                },
                "value": "a",
                "optional": false
              },
              "property": {
                "type": "Identifier",
                "span": {
                  "start": 292,
                  "end": 305,
                  "ctxt": 0
                },
                "value": "equalsShallow",
                "optional": false
              }
            },
            "arguments": [
              {
                "spread": null,
                "expression": {
                  "type": "Identifier",
                  "span": {
                    "start": 306,
                    "end": 307,
                    "ctxt": 0
                  },
                  "value": "b",
                  "optional": false
                }
              }
            ],
            "typeArguments": null
          },
          "definite": false
        }
      ]
    }
  ],
  "interpreter": null
}