Duplicated Key in Dictionary Literal

Dictionary literals with duplicated keys will crash at runtime

  • Identifier: duplicated_key_in_dictionary_literal
  • Enabled by default: Yes
  • Supports autocorrection: No
  • Kind: lint
  • Analyzer rule: No
  • Minimum Swift compiler version: 5.0.0
  • Default configuration:
    KeyValue
    severity warning

Non Triggering Examples

[
    1: "1",
    2: "2"
]

[
    "1": 1,
    "2": 2
]

[
    foo: "1",
    bar: "2"
]

[
    UUID(): "1",
    UUID(): "2"
]

[
    #line: "1",
    #line: "2"
]

Triggering Examples

[
    1: "1",
    2: "2",
    ↓1: "one"
]

[
    "1": 1,
    "2": 2,
    ↓"2": 2
]

[
    foo: "1",
    bar: "2",
    baz: "3",
    ↓foo: "4",
    zaz: "5"
]

[
    .one: "1",
    .two: "2",
    .three: "3",
    ↓.one: "1",
    .four: "4",
    .five: "5"
]