RFR: 8303374: Compiler Implementation for Primitive types in patterns, instanceof, and switch (Preview) [v3]

[Maurizio Cimadamore]

On Mon, 2 Oct 2023 14:47:59 GMT, Aggelos Biboudis <abimpoudis at openjdk.org> wrote:

>> This is the first draft of a patch for Primitive types in patterns, instanceof, and switch (Preview).
>> 
>> Draft spec here: https://cr.openjdk.org/~abimpoudis/instanceof/instanceof-20230913/specs/instanceof-jls.html
>
> Aggelos Biboudis has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains four additional commits since the last revision:
> 
>  - Merge branch 'master' into primitive-patterns
>  - Implement type pairs to exactnessMethod name
>  - Apply suggestions from code review
>    
>    Co-authored-by: Raffaello Giulietti <raffaello.giulietti at oracle.com>
>  - 8303374: Compiler Implementation for Primitive types in patterns, instanceof, and switch (Preview)

src/jdk.compiler/share/classes/com/sun/tools/javac/comp/TransPatterns.java line 770:

> 768:         PrimitiveGenerator primitiveGenerator = new PrimitiveGenerator();
> 769:         primitiveGenerator.assembleSig(primitiveType);
> 770:         return new Symbol.DynamicVarSymbol(names.fromString(primitiveGenerator.sb.toString()),

Why do we need a condy to generate a `Class` object for a type we know statically? E.g. will this not be resolved to <primitiveType>.class ?

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PR Review Comment: https://git.openjdk.org/jdk/pull/15638#discussion_r1342978008