Honor scalar context for sort returned from a subroutine
維護者通常 1 天內回覆
評估
研究方向
Start by reviewing PR #1992, which is already open and describes the fix across the JVM and interpreter backends. Trace how a subroutine return passes runtime context to sort, then run the focused regression and scalar-sort tests on both backends. Done means scalar callers receive Perl's undef result while list behavior remains covered.
由索引模型根據 Issue 內容生成。
描述
Summary
sort in a subroutine return did not honor the caller's scalar context. Perl returns undef for sort in scalar context, but PerlOnJava returned the number of sorted values. This broke DataCube 0.01's tables method, which returns sort keys ... and is called in scalar context by its test suite.
Minimal reproducer
sub f { return sort qw(a b c) }
my $x = f();
print defined($x) ? "<$x>\n" : "undef\n";
Expected under system Perl: undef
Before the fix, PerlOnJava returned <3> on both JVM and interpreter backends.
Evidence
- CPAN distribution: DataCube 0.01; random tester run
20261106-154847-45334. - System Perl 5.42.2: upstream
make testpassed, 26 tests. - PerlOnJava 5.44.1, build commit
13db7bd4a0:t/00_use.texited 255 on both JVM and interpreter after 15 assertions, withCan't use string ("40") as a HASH ref. - The DataCube test assigns
$cube->tablesto a scalar.DataCube::tablesreturnssort keys ...; the scalar result was then treated as a hash reference.
Confirmed cause and fix
Static scalar-context sort was already handled. In a subroutine return, however, the caller's context is dynamic: PerlOnJava retained the sorted list and generic return handling scalarized it to the list length. PR #1992 passes the runtime context to sort on both backends, preserving input evaluation while skipping the comparator and returning undef for a scalar caller.
The focused regression and existing scalar-sort tests pass on system Perl, JVM, and interpreter. The full repository make and documentation link check pass. The DataCube suite progresses beyond the former failure, but later tests exceed the bounded 180-second runs; a full post-fix DataCube suite pass is not claimed.
- 主要語言
- Perl
- 星號
- 65
- 分支
- 8
- 平均合併
- 5 小時 57 分鐘
- 30 天內合併 PR
- 177
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