JDK-8268850 : Detect inferred local variable types in AST
  • Type: Bug
  • Component: tools
  • Sub-Component: javac
  • Affected Version: 10,11,17,18
  • Priority: P4
  • Status: Open
  • Resolution: Unresolved
  • Submitted: 2021-06-15
  • Updated: 2021-07-16
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Other
tbdUnresolved
Related Reports
Relates :  
JDK-8031725 - No way to detect synthetic com.sun.source.tree.Tree's
Relates :  
JDK-8024098 - javac syntax tree should more closely model the source code
Description
The implementation of local variable type inference adds the inferred type to the AST: http://hg.openjdk.java.net/jdk10/master/rev/48ec75306997#l8.23

As discussed in JDK-8024098, it would be nice for the AST to more closely model the source code, including whether a particular local variable's type was explicit in source or inferred from a use of var; ideally pretty-printing a variable declaration would preserve whether or not the source used var.