RFR: 8268124: Update java.lang to use switch expressions

[Rémi Forax]

On Wed, 2 Jun 2021 15:25:16 GMT, Patrick Concannon <pconcannon at openjdk.org> wrote:

> Hi,
> 
> Could someone please review my code for updating the code in the `java.lang` packages to make use of the switch expressions?
> 
> Kind regards,
> Patrick

src/java.base/share/classes/java/lang/invoke/InvokerBytecodeGenerator.java line 1663:

> 1661:             case D_TYPE -> mv.visitInsn(Opcodes.DCONST_0);
> 1662:             case L_TYPE -> mv.visitInsn(Opcodes.ACONST_NULL);
> 1663:             default -> throw new InternalError("unknown type: " + type);

perhaps

  mv.visitInsn(switch(type) { ...

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PR: https://git.openjdk.java.net/jdk/pull/4312