Reflection parameter type could be more precise about specific BackedEnum::from() and tryFrom() type
Open
Nobody has claimed this yet.
- #18016 by @DanielEScherzer — closed without merging
Bug
Extension: reflection
Status: Needs Triage
- Dominant language
- C
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Description
Description
The following code:
<?php
declare(strict_types=1);
enum IntBacked: int {
case One = 1;
}
$rm = new ReflectionMethod(IntBacked::class, 'tryFrom');
var_export((string) $rm->getParameters()[0]->getType());
Resulted in this output:
'string|int'
But I expected this output instead:
'int'
Because when a bad type is passed in there, it's rejected with TypeError:
Argument #1 ($value) must be of type int, string given
Related: https://github.com/php/php-src/issues/12863
PHP Version
PHP 8.1+
Operating System
No response
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by running the provided PHP snippet and tracing ReflectionMethod::getParameters() for the specific BackedEnum::tryFrom() entry point. Confirm that reflection reports int for IntBacked::tryFrom() while passing a string still produces the shown TypeError; no source file or test path is named in the issue.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- c, php
- Domain
- backend
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100