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Fix bitwise on mixed #4423

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Merged
ondrejmirtes merged 3 commits into from
Dec 6, 2025
+120 −6
Merged

Fix bitwise on mixed #4423

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34385de
Fix bitwise on mixed
VincentLanglet Oct 8, 2025
37608db
Update
VincentLanglet Dec 5, 2025
03cd5a4
Try
VincentLanglet Dec 5, 2025
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42 changes: 39 additions & 3 deletions src/Reflection/InitializerExprTypeResolver.php
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Original file line number Diff line number Diff line change
Expand Up @@ -1008,9 +1008,21 @@ public function getBitwiseAndTypeFromTypes(Type $leftType, Type $rightType): Typ
$rightType = $this->optimizeScalarType($rightType);
}

if ($leftType->isString()->yes() && $rightType->isString()->yes()) {
if ($leftType instanceof MixedType && $rightType instanceof MixedType) {
return new BenevolentUnionType([new IntegerType(), new StringType()]);
}

$leftIsString = $leftType->isString();
$rightIsString = $rightType->isString();
if (
($leftIsString->yes() || $leftType instanceof MixedType)
&& ($rightIsString->yes() || $rightType instanceof MixedType)
) {
return new StringType();
}
if ($leftIsString->maybe() && $rightIsString->maybe()) {
return new ErrorType();
}

$leftNumberType = $leftType->toNumber();
$rightNumberType = $rightType->toNumber();
Expand Down Expand Up @@ -1082,9 +1094,21 @@ public function getBitwiseOrTypeFromTypes(Type $leftType, Type $rightType): Type
$rightType = $this->optimizeScalarType($rightType);
}

if ($leftType->isString()->yes() && $rightType->isString()->yes()) {
if ($leftType instanceof MixedType && $rightType instanceof MixedType) {
return new BenevolentUnionType([new IntegerType(), new StringType()]);
}

$leftIsString = $leftType->isString();
$rightIsString = $rightType->isString();
if (
($leftIsString->yes() || $leftType instanceof MixedType)
&& ($rightIsString->yes() || $rightType instanceof MixedType)
) {
return new StringType();
}
if ($leftIsString->maybe() && $rightIsString->maybe()) {
return new ErrorType();
}

if (TypeCombinator::union($leftType->toNumber(), $rightType->toNumber()) instanceof ErrorType) {
return new ErrorType();
Expand Down Expand Up @@ -1146,9 +1170,21 @@ public function getBitwiseXorTypeFromTypes(Type $leftType, Type $rightType): Typ
$rightType = $this->optimizeScalarType($rightType);
}

if ($leftType->isString()->yes() && $rightType->isString()->yes()) {
if ($leftType instanceof MixedType && $rightType instanceof MixedType) {
return new BenevolentUnionType([new IntegerType(), new StringType()]);
}

$leftIsString = $leftType->isString();
$rightIsString = $rightType->isString();
if (
($leftIsString->yes() || $leftType instanceof MixedType)
&& ($rightIsString->yes() || $rightType instanceof MixedType)
) {
return new StringType();
}
if ($leftIsString->maybe() && $rightIsString->maybe()) {
return new ErrorType();
}

if (TypeCombinator::union($leftType->toNumber(), $rightType->toNumber()) instanceof ErrorType) {
return new ErrorType();
Expand Down
6 changes: 3 additions & 3 deletions tests/PHPStan/Analyser/Generator/data/gnsr.php
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Original file line number Diff line number Diff line change
Expand Up @@ -110,7 +110,7 @@ public function doBitwiseNot($a, int $b): void
public function doBitwiseAnd($a, $b, int $c, int $d): void
{
assertType('int', $a & $b);
assertNativeType('int', $a & $b);
assertNativeType('(int|string)', $a & $b);
assertType('1', 1 & 1);
assertNativeType('1', 1 & 1);
assertType('int', $c & $d);
Expand All @@ -125,7 +125,7 @@ public function doBitwiseAnd($a, $b, int $c, int $d): void
public function doBitwiseOr($a, $b, int $c, int $d): void
{
assertType('int', $a | $b);
assertNativeType('int', $a | $b);
assertNativeType('(int|string)', $a | $b);
assertType('1', 1 | 1);
assertNativeType('1', 1 | 1);
assertType('int', $c | $d);
Expand All @@ -140,7 +140,7 @@ public function doBitwiseOr($a, $b, int $c, int $d): void
public function doBitwiseXor($a, $b, int $c, int $d): void
{
assertType('int', $a ^ $b);
assertNativeType('int', $a ^ $b);
assertNativeType('(int|string)', $a ^ $b);
assertType('0', 1 ^ 1);
assertNativeType('0', 1 ^ 1);
assertType('int', $c ^ $d);
Expand Down
63 changes: 63 additions & 0 deletions tests/PHPStan/Analyser/nsrt/bitwise.php
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Original file line number Diff line number Diff line change
@@ -0,0 +1,63 @@
<?php

namespace Bitwise;

use function PHPStan\Testing\assertType;

/**
* @param string|int $stringOrInt
* @param mixed $mixed
*/
function test(int $int, string $string, $stringOrInt, $mixed) : void
{
assertType('int', $int & $int);
assertType('*ERROR*', $int & $string);
assertType('*ERROR*', $int & $stringOrInt);
assertType('int', $int & $mixed);
assertType('*ERROR*', $string & $int);
assertType('string', $string & $string);
assertType('*ERROR*', $string & $stringOrInt);
assertType('string', $string & $mixed);
assertType('*ERROR*', $stringOrInt & $int);
assertType('*ERROR*', $stringOrInt & $string);
assertType('*ERROR*', $stringOrInt & $stringOrInt);
assertType('*ERROR*', $stringOrInt & $mixed);
assertType('int', $mixed & $int);
assertType('string', $mixed & $string);
assertType('*ERROR*', $mixed & $stringOrInt);
assertType('(int|string)', $mixed & $mixed);

assertType('int', $int | $int);
assertType('*ERROR*', $int | $string);
assertType('*ERROR*', $int | $stringOrInt);
assertType('int', $int | $mixed);
assertType('*ERROR*', $string | $int);
assertType('string', $string | $string);
assertType('*ERROR*', $string | $stringOrInt);
assertType('string', $string | $mixed);
assertType('*ERROR*', $stringOrInt | $int);
assertType('*ERROR*', $stringOrInt | $string);
assertType('*ERROR*', $stringOrInt | $stringOrInt);
assertType('*ERROR*', $stringOrInt | $mixed);
assertType('int', $mixed | $int);
assertType('string', $mixed | $string);
assertType('*ERROR*', $mixed | $stringOrInt);
assertType('(int|string)', $mixed | $mixed);

assertType('int', $int ^ $int);
assertType('*ERROR*', $int ^ $string);
assertType('*ERROR*', $int ^ $stringOrInt);
assertType('int', $int ^ $mixed);
assertType('*ERROR*', $string ^ $int);
assertType('string', $string ^ $string);
assertType('*ERROR*', $string ^ $stringOrInt);
assertType('string', $string ^ $mixed);
assertType('*ERROR*', $stringOrInt ^ $int);
assertType('*ERROR*', $stringOrInt ^ $string);
assertType('*ERROR*', $stringOrInt ^ $stringOrInt);
assertType('*ERROR*', $stringOrInt ^ $mixed);
assertType('int', $mixed ^ $int);
assertType('string', $mixed ^ $string);
assertType('*ERROR*', $mixed ^ $stringOrInt);
assertType('(int|string)', $mixed ^ $mixed);
}
5 changes: 5 additions & 0 deletions tests/PHPStan/Rules/Functions/CallToFunctionParametersRuleTest.php
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Original file line number Diff line number Diff line change
Expand Up @@ -2404,6 +2404,11 @@ public function testBug13784(): void
$this->analyse([__DIR__ . '/data/bug-13784.php'], []);
}

public function testBug8094(): void
{
$this->analyse([__DIR__ . '/data/bug-8094.php'], []);
}

public function testBug13556(): void
{
$this->checkExplicitMixed = true;
Expand Down
10 changes: 10 additions & 0 deletions tests/PHPStan/Rules/Functions/data/bug-8094.php
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Original file line number Diff line number Diff line change
@@ -0,0 +1,10 @@
<?php

namespace Bug8094;

function mask_encode($data, $mask)
{
$mask = substr($mask, 0, strlen($data));
$data ^= $mask;
return(base64_encode($data));
}
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