groovy

implement final for local variables

Details

  • Type: Task Task
  • Status: Open Open
  • Priority: Major Major
  • Resolution: Unresolved
  • Affects Version/s: None
  • Fix Version/s: 1.8.x, 2.x
  • Component/s: None
  • Labels:
    None
  • Number of attachments :
    1

Description

a final modifier on a local variable of some kind is currently ignored by groovy. Instead groovy should give a compile time error if final is used but the variable gets still a value

Activity

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Paul King added a comment -

Attaching a spike. This is too strict in that it requires initialization at declaration time, e.g. this is correctly detected:

final x = 3
x = 4            // error
(x, y) = [5, 6]  // also an error

but will reject the following valid code:

final x
x = 2
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Paul King added a comment - Attaching a spike. This is too strict in that it requires initialization at declaration time, e.g. this is correctly detected: final x = 3 x = 4 // error (x, y) = [5, 6] // also an error but will reject the following valid code: final x x = 2
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Paul King added a comment -

A revised patch handling parameters and only local variables with an initial default value. Some questions in my mind:

  • Should EmptyExpression check be outside VariableExpression
  • Do we need to visit defaultValue in VariableScopeVisitor or VariableExpression
  • Is there a better way rather than pushing defaultValue into VariableExpression
  • Should we be handling multiple assignment cases better
  • And the big TODO of dealing with local variables that don't have an initial expression
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Paul King added a comment - A revised patch handling parameters and only local variables with an initial default value. Some questions in my mind: Should EmptyExpression check be outside VariableExpression Do we need to visit defaultValue in VariableScopeVisitor or VariableExpression Is there a better way rather than pushing defaultValue into VariableExpression Should we be handling multiple assignment cases better And the big TODO of dealing with local variables that don't have an initial expression
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Paul King added a comment -

Updated patch - excludes method parameter logic as that is already committed

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Paul King added a comment - Updated patch - excludes method parameter logic as that is already committed
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Paweł Gdula added a comment -

Is there any plan to fix this?

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Paweł Gdula added a comment - Is there any plan to fix this?

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  • Assignee:
    Unassigned
    Reporter:
    blackdrag blackdrag
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Dates

  • Created:
    Updated: