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Match case syntax for imaginary literals allows an extra plus #154775

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Match case syntax for imaginary literals allows an extra plus#154775
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encukou
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interpreter-core(Objects, Python, Grammar, and Parser dirs)type-bugAn unexpected behavior, bug, or error

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@encukou
encukou
opened on Jul 27, 2026

Bug report

#148566 allowed this:

match ...:
    case +1j:
        pass

but also this:

match ...:
    case 1++1j:
        pass

The double plus should not be allowed.

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Activity

  1. encukou
    self-assigned this
    on Jul 27, 2026
  2. encukou
    added
    type-bugAn unexpected behavior, bug, or error
    interpreter-core(Objects, Python, Grammar, and Parser dirs)
    on Jul 27, 2026
  3. encukou
    added 3 commits that reference this issue on Jul 27, 2026

    pythongh-154775: Don't accept duplicate plus sign when matching compl…

    fa5cc5f

    gh-154775: Don't accept duplicate plus sign when matching complex num…

    a85830c

    [3.15] gh-154775: Don't accept duplicate plus sign when matching comp…

    80e6fa8
  4. StanFromIreland
    closed this as completedon Jul 28, 2026
  5. mbeijen
    added a commit that references this issue on Aug 14, 2026

    pythongh-154775: Don't accept duplicate plus sign when matching compl…

    2bd5de4
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interpreter-core(Objects, Python, Grammar, and Parser dirs)type-bugAn unexpected behavior, bug, or error

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