Bug #80224 [Com]: namespaced import alias inconsistent

Edit report at https://bugs.php.net/bug.php?id=80224&edit=1 ID: 80224 Comment by: rowan dot collins at gmail dot com Reported by: xigal18570 at jarilusua dot com Summary: namespaced import alias inconsistent Status: Open Type: Bug Package: *General Issues Operating System: linux PHP Version: 8.0.0rc1 Block user comment: N Private report: N New Comment: Notably, if the parse error is removed from the test script, the "use\Foo\Bar3" gives a fatal runtime error of "undefined constant", because that's what PHP has tried to interpret it as. Even defining a class with "namespace use\Foo { class Bar3 {} }" does not lead to valid code, it requires "namespace use\Foo { const Bar3=42; }", which seems incredibly unlikely. Since "runtime" here means "as soon as the file is included", the only downside of the current behaviour is that static analysis can't flag it as definitely invalid; but an opinionated tool could safely warn that it is an almost certain mistake. Previous Comments: ------------------------------------------------------------------------ [2020-10-12 11:19:49] nikic@php.net > use\Foo\Bar3; // valid While this is valid, it's actually a namespace reference, not a use declaration. I think the correct action here is to forbid the use of a leading \ in use declarations, which should never have been allowed. This will need a deprecation first though, so it's not actionable for PHP 8.0. ------------------------------------------------------------------------ [2020-10-12 11:14:41] xigal18570 at jarilusua dot com Description: ------------ Maybe the description is missing here: https://wiki.php.net/rfc/namespaced_names_as_token Test script: --------------- <?php use \Foo\Bar2; // valid use\Foo\Bar3; // valid use \Foo\Bar4 as Bar44; // valid use\Foo\Bar5 as Bar55; // invalid Expected result: ---------------- last variant being valid as well Actual result: -------------- $ sudo docker-compose run --rm --user "$(id --user):$(id --group)" php php test.php Parse error: syntax error, unexpected token "as" in /app/test.php on line 6 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=80224&edit=1