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patterns: run Guards, NullCase and MatchException demos on 21 too; add switch-on-long check

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Adds broken/SwitchOnLong.java and regenerates transcripts so every 'runs on 21, 25 and 27' claim has a transcript. Additive commit.

Co-Authored-By: Claude Sonnet 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01TF9JWFvJSNm6HVzswzZU5a
This commit is contained in:
Claude
2026-09-24 11:54:48 +00:00
parent bc91b9c8d0
commit 65a4bbbbe3
6 changed files with 52 additions and 3 deletions
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patterns/output/07-primitive-patterns.txt
+20
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@@ -12,6 +12,26 @@ preview/PrimitiveInstanceof.java:3: error: primitive patterns are a preview feat
(use --enable-preview to enable primitive patterns)
1 error
$ javac broken/SwitchOnLong.java (21.0.10+7-Ubuntu-124.04)
broken/SwitchOnLong.java:4: error: selector type long is not allowed
String s = switch (n) { // switch on long: not allowed without the preview
^
1 error
$ javac broken/SwitchOnLong.java (25.0.4.1+1-LTS)
broken/SwitchOnLong.java:4: error: primitive patterns are a preview feature and are disabled by default.
String s = switch (n) { // switch on long: not allowed without the preview
^
(use --enable-preview to enable primitive patterns)
1 error
$ javac broken/SwitchOnLong.java (27+35)
broken/SwitchOnLong.java:4: error: primitive patterns are a preview feature and are disabled by default.
String s = switch (n) { // switch on long: not allowed without the preview
^
(use --enable-preview to enable primitive patterns)
1 error
$ javac --enable-preview --release 25 preview/PrimitiveInstanceof.java && java --enable-preview PrimitiveInstanceof (25.0.4.1+1-LTS)
100 fits in a byte: 100
1000 fits in a short: 1000