JDK-6998735 : Variable arity parameter type involving arrays
- Type: Enhancement
- Component: specification
- Sub-Component: language
- Affected Version: 7
- Priority: P4
- Status: Closed
- Resolution: Fixed
- OS: generic
- CPU: generic
- Submitted: 2010-11-09
- Updated: 2014-02-26
- Resolved: 2011-07-21
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| JDK 7 |
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7 rcFixed  |
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Description
JLS3 allows legacy array syntax ('int x[]') for a variable-arity parameter ('int... x[]') but neither javac nor Eclipse ever supported it. We should seize this opportunity to ban it by allowing only an identifier after '...' in 8.4.1:
LastFormalParameter:
VariableModifiers_opt Type '...' Identifier // Note '...' is not _opt
FormalParameter
"The last formal parameter in a list may be a variable arity parameter, indicated by an ellipsis following the type. ***Legacy array syntax (10.2) is not supported for a variable arity parameter.***"
Regarding legacy array syntax elsewhere in the JLS:
JLS3 14.4.1 says: "The type of the variable is denoted by the Type that appears in the local variable declaration, followed by any bracket pairs that follows the Identifier in the declarator."
This text applies to any variable declaration at an array type, so JLS 10.2 should include it (suitably modified) after the paragraph "The [] may appear as part...". 8.3's paragraph "Variable declarations involving array types are discussed in 10.2" then has more utility.
10.2's reference to 8.3 should also point to 14.4.1.
Comments
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