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Fix class-string<*> being supertype of any string literal #2707

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Fix class-string<*> being supertype of any string literal #2707

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428ba86
fix `class-string<*>` being supertype of any string literal
jrmajor Oct 31, 2023
fec6fa5
add type combinator tests
jrmajor Oct 31, 2023
e2500e6
formatting
jrmajor Oct 31, 2023
05edb25
move test and wrap func calls in anonymous func
jrmajor Oct 31, 2023
b68a40d
fix `class-string<*>&'foo'` intersection
jrmajor Oct 31, 2023
a293912
simplify
jrmajor Oct 31, 2023
bb929f3
fix for maybe
jrmajor Oct 31, 2023
218633a
simplify
jrmajor Oct 31, 2023
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2 changes: 1 addition & 1 deletion src/Type/Generic/GenericClassStringType.php
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Original file line number Diff line number Diff line change
Expand Up @@ -94,7 +94,7 @@ public function isSuperTypeOf(Type $type): TrinaryLogic
if ($type instanceof ConstantStringType) {
$genericType = $this->type;
if ($genericType instanceof MixedType) {
return TrinaryLogic::createYes();
return $type->isClassStringType();
}

if ($genericType instanceof StaticType) {
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6 changes: 6 additions & 0 deletions tests/PHPStan/Analyser/AnalyserIntegrationTest.php
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Expand Up @@ -1252,6 +1252,12 @@ public function testBug10049(): void
$this->assertNoErrors($errors);
}

public function testBug10076(): void
{
$errors = $this->runAnalyse(__DIR__ . '/data/bug-10076.php');
$this->assertNoErrors($errors);
}

/**
* @param string[]|null $allAnalysedFiles
* @return Error[]
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20 changes: 20 additions & 0 deletions tests/PHPStan/Analyser/data/bug-10076.php
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Original file line number Diff line number Diff line change
@@ -0,0 +1,20 @@
<?php

namespace Bug10076;

/**
* @template T
*
* @param 'object'|'array'|class-string<T> $type
*
* @return list<mixed>
*/
function result($type = 'object'): array
{
return [];
}

result();
result('object');
result('array');
result(\DateTime::class);
10 changes: 10 additions & 0 deletions tests/PHPStan/Type/Generic/GenericClassStringTypeTest.php
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Original file line number Diff line number Diff line change
Expand Up @@ -155,6 +155,16 @@ public function dataIsSuperTypeOf(): array
new ConstantStringType(IntegerType::class),
TrinaryLogic::createMaybe(),
],
19 => [
new GenericClassStringType(TemplateTypeFactory::create(
TemplateTypeScope::createWithFunction('foo'),
'T',
null,
TemplateTypeVariance::createInvariant(),
)),
new ConstantStringType('array'),
TrinaryLogic::createNo(),
],
];
}

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41 changes: 41 additions & 0 deletions tests/PHPStan/Type/TypeCombinatorTest.php
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Expand Up @@ -2494,6 +2494,34 @@ public function dataUnion(): iterable
UnionType::class,
'array{a?: true, b: true}|(array{a?: true, c?: true}&non-empty-array)',
];

yield [
[
new ConstantStringType('array'),
new GenericClassStringType(TemplateTypeFactory::create(
TemplateTypeScope::createWithFunction('foo'),
'T',
null,
TemplateTypeVariance::createInvariant(),
)),
],
UnionType::class,
"'array'|class-string<T (function foo(), parameter)>",
];

yield [
[
new ConstantStringType(Exception::class),
new GenericClassStringType(TemplateTypeFactory::create(
TemplateTypeScope::createWithFunction('foo'),
'T',
null,
TemplateTypeVariance::createInvariant(),
)),
],
GenericClassStringType::class,
'class-string<T (function foo(), parameter)>',
];
}

/**
Expand Down Expand Up @@ -4134,6 +4162,19 @@ public function dataIntersect(): iterable
IntersectionType::class,
'array{a?: true, c?: true}&non-empty-array',
];
yield [
[
new ConstantStringType(Exception::class),
new GenericClassStringType(TemplateTypeFactory::create(
TemplateTypeScope::createWithFunction('foo'),
'T',
null,
TemplateTypeVariance::createInvariant(),
)),
],
ConstantStringType::class,
"'Exception'",
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Please test intersection with 'array' too - should be NeverType.

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Fixing the test for phpstan/phpstan#6697 would make it 'array'&class-string<T (function foo(), parameter)> instead of never, because we would need to assume that 'array' may be name of a class PHPStan doesn't know about. What should I do about that?

];
}

/**
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