Allow using imported types in other types within the same file #8708
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In the test case (from issue vimeo#7116) both the type definition and the import of the typed lived in the same file. This caused `OpeningTypes` to be an `InlineTypeAlias` instead of a `LinkableTypeAlias`, in turn causing an 'Invalid type alias' exception[^1]. By replacing the array union (+) with an array_merge, the import of the type overrides the initial type declaration within the `Main` class. This means type imports within one file act more like they would when in separate files. Fixes vimeo#7116 [^1]: [src/Psalm/Type/Atomic.php:407](https://github.com/vimeo/psalm/blob/1986c8b4a8018b1819bc4b83b0f7e69c2c936792/src/Psalm/Type/Atomic.php#L407)
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In the test case (from issue #7116) both the type definition and the import of the typed lived in the same file. This caused
OpeningTypesto be anInlineTypeAliasinstead of aLinkableTypeAlias, in turn causing an 'Invalid type alias' exception1By replacing the array union (+) with an array_merge, the import of the type overrides the initial type declaration within the
Mainclass. This means type imports within one file act more like they would when in separate files.Fixes #7116
Footnotes
src/Psalm/Type/Atomic.php:407 ↩