Details
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Sub-task
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Status: Open
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P4
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Resolution: Unresolved
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None
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None
Description
Currently it is not permitted to precede the `this()` or `super()` call in a constructor invocation with statements. This often causes distorted control flow and challenges in refactoring.
We would amend JLS 8.8.7 as follows:
- Production is amended to:
ConstructorBody:
{ [ BlockStatements ] [ ExplicitConstructorInvocation ] [ BlockStatements ] }
- Restriction about first statement is relaxed to apply to the explicit ctor invocation, wherever it resides.
- s/begin with/include/
- Add note (somewhere) that in the first BlockStatement, `this` is DU, and in the second, `this` is DA.
- Clarify that a return statement may only be used in the second BlockStatements.
We would amend JLS 8.8.7 as follows:
- Production is amended to:
ConstructorBody:
{ [ BlockStatements ] [ ExplicitConstructorInvocation ] [ BlockStatements ] }
- Restriction about first statement is relaxed to apply to the explicit ctor invocation, wherever it resides.
- s/begin with/include/
- Add note (somewhere) that in the first BlockStatement, `this` is DU, and in the second, `this` is DA.
- Clarify that a return statement may only be used in the second BlockStatements.
Attachments
Issue Links
- csr for
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JDK-8302041 Permit additional statements before this/super in constructors
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- Finalized
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- duplicates
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- Closed
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JDK-8193760 allow code in a constructor before the call to the super constructor
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- Resolved
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- relates to
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JDK-8300786 Statements before super()
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- Submitted
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