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ArithmeticOpAnalyzer.php
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ArithmeticOpAnalyzer.php
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<?php
namespace Psalm\Internal\Analyzer\Statements\Expression\BinaryOp;
use PhpParser;
use Psalm\CodeLocation;
use Psalm\Codebase;
use Psalm\Config;
use Psalm\Context;
use Psalm\Internal\Analyzer\FunctionLikeAnalyzer;
use Psalm\Internal\Analyzer\Statements\Expression\Assignment\ArrayAssignmentAnalyzer;
use Psalm\Internal\Analyzer\StatementsAnalyzer;
use Psalm\Internal\Analyzer\TraitAnalyzer;
use Psalm\Internal\Provider\NodeDataProvider;
use Psalm\Internal\Type\TypeCombiner;
use Psalm\Issue\FalseOperand;
use Psalm\Issue\InvalidOperand;
use Psalm\Issue\MixedOperand;
use Psalm\Issue\NullOperand;
use Psalm\Issue\PossiblyFalseOperand;
use Psalm\Issue\PossiblyInvalidOperand;
use Psalm\Issue\PossiblyNullOperand;
use Psalm\Issue\StringIncrement;
use Psalm\IssueBuffer;
use Psalm\StatementsSource;
use Psalm\Type;
use Psalm\Type\Atomic;
use Psalm\Type\Atomic\TArray;
use Psalm\Type\Atomic\TFalse;
use Psalm\Type\Atomic\TFloat;
use Psalm\Type\Atomic\TInt;
use Psalm\Type\Atomic\TIntRange;
use Psalm\Type\Atomic\TKeyedArray;
use Psalm\Type\Atomic\TList;
use Psalm\Type\Atomic\TLiteralFloat;
use Psalm\Type\Atomic\TLiteralInt;
use Psalm\Type\Atomic\TLiteralString;
use Psalm\Type\Atomic\TMixed;
use Psalm\Type\Atomic\TNamedObject;
use Psalm\Type\Atomic\TNull;
use Psalm\Type\Atomic\TNumeric;
use Psalm\Type\Atomic\TNumericString;
use Psalm\Type\Atomic\TPositiveInt;
use Psalm\Type\Atomic\TString;
use Psalm\Type\Atomic\TTemplateParam;
use Psalm\Type\Union;
use function array_diff_key;
use function array_values;
use function count;
use function is_int;
use function is_numeric;
use function max;
use function min;
use function preg_match;
use function strtolower;
/**
* @internal
*/
class ArithmeticOpAnalyzer
{
public static function analyze(
?StatementsSource $statements_source,
NodeDataProvider $nodes,
PhpParser\Node\Expr $left,
PhpParser\Node\Expr $right,
PhpParser\Node $parent,
?Union &$result_type = null,
?Context $context = null
): void {
$codebase = $statements_source ? $statements_source->getCodebase() : null;
$left_type = $nodes->getType($left);
$right_type = $nodes->getType($right);
$config = Config::getInstance();
if ($left_type && $left_type->isNever()) {
$left_type = $right_type;
} elseif ($right_type && $right_type->isNever()) {
$right_type = $left_type;
}
if ($left_type && $right_type) {
if ($left_type->isNull()) {
if ($statements_source && IssueBuffer::accepts(
new NullOperand(
'Left operand cannot be null',
new CodeLocation($statements_source, $left)
),
$statements_source->getSuppressedIssues()
)) {
// fall through
}
$result_type = Type::getMixed();
return;
}
if ($left_type->isNullable() && !$left_type->ignore_nullable_issues) {
if ($statements_source && IssueBuffer::accepts(
new PossiblyNullOperand(
'Left operand cannot be nullable, got ' . $left_type,
new CodeLocation($statements_source, $left)
),
$statements_source->getSuppressedIssues()
)) {
// fall through
}
}
if ($right_type->isNull()) {
if ($statements_source && IssueBuffer::accepts(
new NullOperand(
'Right operand cannot be null',
new CodeLocation($statements_source, $right)
),
$statements_source->getSuppressedIssues()
)) {
// fall through
}
$result_type = Type::getMixed();
return;
}
if ($right_type->isNullable() && !$right_type->ignore_nullable_issues) {
if ($statements_source && IssueBuffer::accepts(
new PossiblyNullOperand(
'Right operand cannot be nullable, got ' . $right_type,
new CodeLocation($statements_source, $right)
),
$statements_source->getSuppressedIssues()
)) {
// fall through
}
}
if ($left_type->isFalse()) {
if ($statements_source && IssueBuffer::accepts(
new FalseOperand(
'Left operand cannot be false',
new CodeLocation($statements_source, $left)
),
$statements_source->getSuppressedIssues()
)) {
// fall through
}
return;
}
if ($left_type->isFalsable() && !$left_type->ignore_falsable_issues) {
if ($statements_source && IssueBuffer::accepts(
new PossiblyFalseOperand(
'Left operand cannot be falsable, got ' . $left_type,
new CodeLocation($statements_source, $left)
),
$statements_source->getSuppressedIssues()
)) {
// fall through
}
}
if ($right_type->isFalse()) {
if ($statements_source && IssueBuffer::accepts(
new FalseOperand(
'Right operand cannot be false',
new CodeLocation($statements_source, $right)
),
$statements_source->getSuppressedIssues()
)) {
// fall through
}
return;
}
if ($right_type->isFalsable() && !$right_type->ignore_falsable_issues) {
if ($statements_source && IssueBuffer::accepts(
new PossiblyFalseOperand(
'Right operand cannot be falsable, got ' . $right_type,
new CodeLocation($statements_source, $right)
),
$statements_source->getSuppressedIssues()
)) {
// fall through
}
}
$invalid_left_messages = [];
$invalid_right_messages = [];
$has_valid_left_operand = false;
$has_valid_right_operand = false;
$has_string_increment = false;
foreach ($left_type->getAtomicTypes() as $left_type_part) {
foreach ($right_type->getAtomicTypes() as $right_type_part) {
$candidate_result_type = self::analyzeOperands(
$statements_source,
$codebase,
$config,
$context,
$left,
$right,
$parent,
$left_type_part,
$right_type_part,
$invalid_left_messages,
$invalid_right_messages,
$has_valid_left_operand,
$has_valid_right_operand,
$has_string_increment,
$result_type
);
if ($candidate_result_type) {
$result_type = $candidate_result_type;
return;
}
}
}
if ($invalid_left_messages && $statements_source) {
$first_left_message = $invalid_left_messages[0];
if ($has_valid_left_operand) {
IssueBuffer::maybeAdd(
new PossiblyInvalidOperand(
$first_left_message,
new CodeLocation($statements_source, $left)
),
$statements_source->getSuppressedIssues()
);
} else {
IssueBuffer::maybeAdd(
new InvalidOperand(
$first_left_message,
new CodeLocation($statements_source, $left)
),
$statements_source->getSuppressedIssues()
);
}
}
if ($invalid_right_messages && $statements_source) {
$first_right_message = $invalid_right_messages[0];
if ($has_valid_right_operand) {
IssueBuffer::maybeAdd(
new PossiblyInvalidOperand(
$first_right_message,
new CodeLocation($statements_source, $right)
),
$statements_source->getSuppressedIssues()
);
} else {
IssueBuffer::maybeAdd(
new InvalidOperand(
$first_right_message,
new CodeLocation($statements_source, $right)
),
$statements_source->getSuppressedIssues()
);
}
}
if ($has_string_increment && $statements_source) {
IssueBuffer::maybeAdd(
new StringIncrement(
'Possibly unintended string increment',
new CodeLocation($statements_source, $left)
),
$statements_source->getSuppressedIssues()
);
}
}
}
/**
* @param int|float $result
*/
private static function getNumericalType($result): Union
{
if (is_int($result)) {
return Type::getInt(false, $result);
}
return Type::getFloat($result);
}
/**
* @param string[] $invalid_left_messages
* @param string[] $invalid_right_messages
*/
private static function analyzeOperands(
?StatementsSource $statements_source,
?Codebase $codebase,
Config $config,
?Context $context,
PhpParser\Node\Expr $left,
PhpParser\Node\Expr $right,
PhpParser\Node $parent,
Atomic $left_type_part,
Atomic $right_type_part,
array &$invalid_left_messages,
array &$invalid_right_messages,
bool &$has_valid_left_operand,
bool &$has_valid_right_operand,
bool &$has_string_increment,
Union &$result_type = null
): ?Union {
if ($left_type_part instanceof TLiteralInt
&& $right_type_part instanceof TLiteralInt
&& (
//we don't try to do arithmetics on variables in loops
$context === null
|| $context->inside_loop === false
|| (!$left instanceof PhpParser\Node\Expr\Variable && !$right instanceof PhpParser\Node\Expr\Variable)
)
) {
// time for some arithmetic!
$calculated_type = self::arithmeticOperation(
$parent,
$left_type_part->value,
$right_type_part->value,
true
);
if ($calculated_type) {
$result_type = Type::combineUnionTypes(
$calculated_type,
$result_type
);
$has_valid_left_operand = true;
$has_valid_right_operand = true;
return null;
}
}
if ($left_type_part instanceof TNull || $right_type_part instanceof TNull) {
// null case is handled above
return null;
}
if ($left_type_part instanceof TFalse || $right_type_part instanceof TFalse) {
// null case is handled above
return null;
}
if ($left_type_part instanceof TString
&& $right_type_part instanceof TInt
&& (
$parent instanceof PhpParser\Node\Expr\PostInc ||
$parent instanceof PhpParser\Node\Expr\PreInc
)
) {
if ($left_type_part instanceof TNumericString ||
($left_type_part instanceof TLiteralString && is_numeric($left_type_part->value))
) {
$new_result_type = new Union([new TFloat(), new TInt()]);
$new_result_type->from_calculation = true;
} else {
$new_result_type = Type::getNonEmptyString();
$has_string_increment = true;
}
$result_type = Type::combineUnionTypes($new_result_type, $result_type);
$has_valid_left_operand = true;
$has_valid_right_operand = true;
return null;
}
if ($left_type_part instanceof TTemplateParam
&& $right_type_part instanceof TTemplateParam
) {
$combined_type = Type::combineUnionTypes(
$left_type_part->as,
$right_type_part->as
);
$combined_atomic_types = array_values($combined_type->getAtomicTypes());
if (count($combined_atomic_types) <= 2) {
$left_type_part = $combined_atomic_types[0];
$right_type_part = $combined_atomic_types[1] ?? $combined_atomic_types[0];
}
}
if ($left_type_part instanceof TMixed || $right_type_part instanceof TMixed) {
if ($statements_source && $codebase && $context) {
if (!$context->collect_initializations
&& !$context->collect_mutations
&& $statements_source->getFilePath() === $statements_source->getRootFilePath()
&& (!(($source = $statements_source->getSource())
instanceof FunctionLikeAnalyzer)
|| !$source->getSource() instanceof TraitAnalyzer)
) {
$codebase->analyzer->incrementMixedCount($statements_source->getFilePath());
}
}
if ($left_type_part instanceof TMixed) {
if ($statements_source && IssueBuffer::accepts(
new MixedOperand(
'Left operand cannot be mixed',
new CodeLocation($statements_source, $left)
),
$statements_source->getSuppressedIssues()
)) {
// fall through
}
} else {
if ($statements_source && IssueBuffer::accepts(
new MixedOperand(
'Right operand cannot be mixed',
new CodeLocation($statements_source, $right)
),
$statements_source->getSuppressedIssues()
)) {
// fall through
}
}
if ($left_type_part instanceof TMixed
&& $left_type_part->from_loop_isset
&& $parent instanceof PhpParser\Node\Expr\AssignOp\Plus
&& !$right_type_part instanceof TMixed
) {
$result_type = Type::combineUnionTypes(new Union([$right_type_part]), $result_type);
return null;
}
$from_loop_isset = (!($left_type_part instanceof TMixed) || $left_type_part->from_loop_isset)
&& (!($right_type_part instanceof TMixed) || $right_type_part->from_loop_isset);
$result_type = Type::getMixed($from_loop_isset);
return $result_type;
}
if ($left_type_part instanceof TTemplateParam || $right_type_part instanceof TTemplateParam) {
if ($left_type_part instanceof TTemplateParam && !$left_type_part->as->isInt()) {
if ($statements_source && IssueBuffer::accepts(
new MixedOperand(
'Left operand cannot be a non-int template',
new CodeLocation($statements_source, $left)
),
$statements_source->getSuppressedIssues()
)) {
// fall through
}
} elseif ($right_type_part instanceof TTemplateParam && !$right_type_part->as->isInt()) {
if ($statements_source && IssueBuffer::accepts(
new MixedOperand(
'Right operand cannot be a non-int template',
new CodeLocation($statements_source, $right)
),
$statements_source->getSuppressedIssues()
)) {
// fall through
}
}
return null;
}
if ($statements_source && $codebase && $context) {
if (!$context->collect_initializations
&& !$context->collect_mutations
&& $statements_source->getFilePath() === $statements_source->getRootFilePath()
&& (!(($parent_source = $statements_source->getSource())
instanceof FunctionLikeAnalyzer)
|| !$parent_source->getSource() instanceof TraitAnalyzer)
) {
$codebase->analyzer->incrementNonMixedCount($statements_source->getFilePath());
}
}
if ($left_type_part instanceof TArray
|| $right_type_part instanceof TArray
|| $left_type_part instanceof TKeyedArray
|| $right_type_part instanceof TKeyedArray
|| $left_type_part instanceof TList
|| $right_type_part instanceof TList
) {
if ((!$right_type_part instanceof TArray
&& !$right_type_part instanceof TKeyedArray
&& !$right_type_part instanceof TList)
|| (!$left_type_part instanceof TArray
&& !$left_type_part instanceof TKeyedArray
&& !$left_type_part instanceof TList)
) {
if (!$left_type_part instanceof TArray
&& !$left_type_part instanceof TKeyedArray
&& !$left_type_part instanceof TList
) {
$invalid_left_messages[] = 'Cannot add an array to a non-array ' . $left_type_part;
} else {
$invalid_right_messages[] = 'Cannot add an array to a non-array ' . $right_type_part;
}
if ($left_type_part instanceof TArray
|| $left_type_part instanceof TKeyedArray
|| $left_type_part instanceof TList
) {
$has_valid_left_operand = true;
} elseif ($right_type_part instanceof TArray
|| $right_type_part instanceof TKeyedArray
|| $right_type_part instanceof TList
) {
$has_valid_right_operand = true;
}
$result_type = Type::getArray();
return null;
}
$has_valid_right_operand = true;
$has_valid_left_operand = true;
if ($left_type_part instanceof TKeyedArray
&& $right_type_part instanceof TKeyedArray
) {
$definitely_existing_mixed_right_properties = array_diff_key(
$right_type_part->properties,
$left_type_part->properties
);
$properties = $left_type_part->properties;
foreach ($right_type_part->properties as $key => $type) {
if (!isset($properties[$key])) {
$properties[$key] = $type;
} elseif ($properties[$key]->possibly_undefined) {
$properties[$key] = Type::combineUnionTypes(
$properties[$key],
$type,
$codebase
);
$properties[$key]->possibly_undefined = $type->possibly_undefined;
}
}
if (!$left_type_part->sealed) {
foreach ($definitely_existing_mixed_right_properties as $key => $type) {
$properties[$key] = Type::combineUnionTypes(Type::getMixed(), $type);
}
}
$new_keyed_array = new TKeyedArray($properties);
$new_keyed_array->sealed = $left_type_part->sealed && $right_type_part->sealed;
$result_type_member = new Union([$new_keyed_array]);
} else {
$result_type_member = TypeCombiner::combine(
[$left_type_part, $right_type_part],
$codebase,
true
);
}
$result_type = Type::combineUnionTypes($result_type_member, $result_type, $codebase, true);
if ($left instanceof PhpParser\Node\Expr\ArrayDimFetch
&& $context
&& $statements_source instanceof StatementsAnalyzer
) {
ArrayAssignmentAnalyzer::updateArrayType(
$statements_source,
$left,
$right,
$result_type,
$context
);
}
return null;
}
if (($left_type_part instanceof TNamedObject && strtolower($left_type_part->value) === 'gmp')
|| ($right_type_part instanceof TNamedObject && strtolower($right_type_part->value) === 'gmp')
) {
if ((($left_type_part instanceof TNamedObject
&& strtolower($left_type_part->value) === 'gmp')
&& (($right_type_part instanceof TNamedObject
&& strtolower($right_type_part->value) === 'gmp')
|| ($right_type_part->isNumericType() || $right_type_part instanceof TMixed)))
|| (($right_type_part instanceof TNamedObject
&& strtolower($right_type_part->value) === 'gmp')
&& (($left_type_part instanceof TNamedObject
&& strtolower($left_type_part->value) === 'gmp')
|| ($left_type_part->isNumericType() || $left_type_part instanceof TMixed)))
) {
$result_type = Type::combineUnionTypes(
new Union([new TNamedObject('GMP')]),
$result_type
);
} else {
if ($statements_source && IssueBuffer::accepts(
new InvalidOperand(
'Cannot add GMP to non-numeric type',
new CodeLocation($statements_source, $parent)
),
$statements_source->getSuppressedIssues()
)) {
// fall through
}
}
return null;
}
if ($parent instanceof PhpParser\Node\Expr\BinaryOp\Plus
|| $parent instanceof PhpParser\Node\Expr\BinaryOp\Minus
|| $parent instanceof PhpParser\Node\Expr\BinaryOp\Mul
|| $parent instanceof PhpParser\Node\Expr\BinaryOp\Div
|| $parent instanceof PhpParser\Node\Expr\BinaryOp\Mod
|| $parent instanceof PhpParser\Node\Expr\BinaryOp\Pow
) {
$non_decimal_type = null;
if ($left_type_part instanceof TNamedObject
&& strtolower($left_type_part->value) === "decimal\\decimal"
) {
$non_decimal_type = $right_type_part;
} elseif ($right_type_part instanceof TNamedObject
&& strtolower($right_type_part->value) === "decimal\\decimal"
) {
$non_decimal_type = $left_type_part;
}
if ($non_decimal_type !== null) {
if ($non_decimal_type instanceof TInt
|| $non_decimal_type instanceof TNumericString
|| $non_decimal_type instanceof TNamedObject
&& strtolower($non_decimal_type->value) === "decimal\\decimal"
) {
$result_type = Type::combineUnionTypes(
new Union([new TNamedObject("Decimal\\Decimal")]),
$result_type
);
} else {
if ($statements_source) {
IssueBuffer::maybeAdd(
new InvalidOperand(
"Cannot add Decimal\\Decimal to {$non_decimal_type->getId()}",
new CodeLocation($statements_source, $parent)
),
$statements_source->getSuppressedIssues()
);
}
}
return null;
}
}
if ($left_type_part instanceof TLiteralString) {
if (preg_match('/^\-?\d+$/', $left_type_part->value)) {
$left_type_part = new TLiteralInt((int) $left_type_part->value);
} elseif (preg_match('/^\-?\d?\.\d+$/', $left_type_part->value)) {
$left_type_part = new TLiteralFloat((float) $left_type_part->value);
}
}
if ($right_type_part instanceof TLiteralString) {
if (preg_match('/^\-?\d+$/', $right_type_part->value)) {
$right_type_part = new TLiteralInt((int) $right_type_part->value);
} elseif (preg_match('/^\-?\d?\.\d+$/', $right_type_part->value)) {
$right_type_part = new TLiteralFloat((float) $right_type_part->value);
}
}
if ($left_type_part->isNumericType() || $right_type_part->isNumericType()) {
if (($left_type_part instanceof TNumeric || $right_type_part instanceof TNumeric)
&& ($left_type_part->isNumericType() && $right_type_part->isNumericType())
) {
if ($config->strict_binary_operands) {
if ($statements_source && IssueBuffer::accepts(
new InvalidOperand(
'Cannot process different numeric types together in strict binary operands mode, '.
'please cast explicitly',
new CodeLocation($statements_source, $parent)
),
$statements_source->getSuppressedIssues()
)) {
// fall through
}
}
if ($parent instanceof PhpParser\Node\Expr\BinaryOp\Mod) {
$new_result_type = Type::getInt();
} else {
$new_result_type = new Union([new TFloat(), new TInt()]);
}
$result_type = Type::combineUnionTypes($new_result_type, $result_type);
$has_valid_right_operand = true;
$has_valid_left_operand = true;
return null;
}
if ($left_type_part instanceof TIntRange && $right_type_part instanceof TIntRange) {
self::analyzeOperandsBetweenIntRange($parent, $result_type, $left_type_part, $right_type_part);
return null;
}
if (($left_type_part instanceof TIntRange && $right_type_part instanceof TInt) ||
($left_type_part instanceof TInt && $right_type_part instanceof TIntRange)
) {
self::analyzeOperandsBetweenIntRangeAndInt(
$parent,
$result_type,
$left_type_part,
$right_type_part
);
return null;
}
if ($left_type_part instanceof TInt && $right_type_part instanceof TInt) {
if ($parent instanceof PhpParser\Node\Expr\BinaryOp\Div) {
$result_type = new Union([new TInt(), new TFloat()]);
} else {
$left_is_positive = $left_type_part instanceof TPositiveInt
|| ($left_type_part instanceof TLiteralInt && $left_type_part->value > 0);
$right_is_positive = $right_type_part instanceof TPositiveInt
|| ($right_type_part instanceof TLiteralInt && $right_type_part->value > 0);
if ($parent instanceof PhpParser\Node\Expr\BinaryOp\Minus) {
$always_positive = false;
} elseif ($left_is_positive && $right_is_positive) {
if ($parent instanceof PhpParser\Node\Expr\BinaryOp\BitwiseXor
|| $parent instanceof PhpParser\Node\Expr\BinaryOp\BitwiseAnd
|| $parent instanceof PhpParser\Node\Expr\BinaryOp\ShiftLeft
|| $parent instanceof PhpParser\Node\Expr\BinaryOp\ShiftRight
) {
$always_positive = false;
} else {
$always_positive = true;
}
} elseif ($parent instanceof PhpParser\Node\Expr\BinaryOp\Plus
&& ($left_type_part instanceof TLiteralInt && $left_type_part->value === 0)
&& $right_is_positive
) {
$always_positive = true;
} elseif ($parent instanceof PhpParser\Node\Expr\BinaryOp\Plus
&& ($right_type_part instanceof TLiteralInt && $right_type_part->value === 0)
&& $left_is_positive
) {
$always_positive = true;
} else {
$always_positive = false;
}
if ($parent instanceof PhpParser\Node\Expr\BinaryOp\Mod) {
if ($right_type_part instanceof TLiteralInt) {
$literal_value_max = $right_type_part->value - 1;
if ($always_positive) {
$result_type = new Union([new TIntRange(0, $literal_value_max)]);
} else {
$result_type = new Union(
[new TIntRange(-$literal_value_max, $literal_value_max)]
);
}
} else {
if ($always_positive) {
$result_type = new Union([
new TPositiveInt(),
new TLiteralInt(0)
]);
} else {
$result_type = Type::getInt();
}
}
} else {
$result_type = Type::combineUnionTypes(
$always_positive ? Type::getPositiveInt(true) : Type::getInt(true),
$result_type
);
}
}
$has_valid_right_operand = true;
$has_valid_left_operand = true;
return null;
}
if ($left_type_part instanceof TFloat && $right_type_part instanceof TFloat) {
if ($parent instanceof PhpParser\Node\Expr\BinaryOp\Mod) {
$result_type = Type::getInt();
} else {
$result_type = Type::combineUnionTypes(Type::getFloat(), $result_type);
}
$has_valid_right_operand = true;
$has_valid_left_operand = true;
return null;
}
if (($left_type_part instanceof TFloat && $right_type_part instanceof TInt)
|| ($left_type_part instanceof TInt && $right_type_part instanceof TFloat)
) {
if ($config->strict_binary_operands) {
if ($statements_source && IssueBuffer::accepts(
new InvalidOperand(
'Cannot process ints and floats in strict binary operands mode, '.
'please cast explicitly',
new CodeLocation($statements_source, $parent)
),
$statements_source->getSuppressedIssues()
)) {
// fall through
}
}
if ($parent instanceof PhpParser\Node\Expr\BinaryOp\Mod) {
$result_type = Type::getInt();
} else {
$result_type = Type::combineUnionTypes(Type::getFloat(), $result_type);
}
$has_valid_right_operand = true;
$has_valid_left_operand = true;
return null;
}
if ($left_type_part->isNumericType() && $right_type_part->isNumericType()) {
if ($config->strict_binary_operands) {
if ($statements_source && IssueBuffer::accepts(
new InvalidOperand(
'Cannot process numeric types together in strict operands mode, '.
'please cast explicitly',
new CodeLocation($statements_source, $parent)
),
$statements_source->getSuppressedIssues()
)) {
// fall through
}
}
if ($parent instanceof PhpParser\Node\Expr\BinaryOp\Mod) {
$result_type = Type::getInt();
} else {
$result_type = new Union([new TInt, new TFloat]);
}
$has_valid_right_operand = true;
$has_valid_left_operand = true;
return null;
}
if (!$left_type_part->isNumericType()) {
$invalid_left_messages[] = 'Cannot perform a numeric operation with a non-numeric type '
. $left_type_part;
$has_valid_right_operand = true;
} else {
$invalid_right_messages[] = 'Cannot perform a numeric operation with a non-numeric type '
. $right_type_part;
$has_valid_left_operand = true;
}
} else {
$invalid_left_messages[] =
'Cannot perform a numeric operation with non-numeric types ' . $left_type_part
. ' and ' . $right_type_part;
}
return null;
}
/**
* @param PhpParser\Node $operation
* @param float|int $operand1
* @param float|int $operand2
*/
public static function arithmeticOperation(
PhpParser\Node $operation,
$operand1,
$operand2,
bool $allow_float_result
): ?Union {
if ($operation instanceof PhpParser\Node\Expr\BinaryOp\Plus) {
$result = $operand1 + $operand2;
} elseif ($operation instanceof PhpParser\Node\Expr\BinaryOp\Minus) {
$result = $operand1 - $operand2;
} elseif ($operation instanceof PhpParser\Node\Expr\BinaryOp\Mod) {
if ($operand2 === 0) {
return Type::getNever();
}
$result = $operand1 % $operand2;
} elseif ($operation instanceof PhpParser\Node\Expr\BinaryOp\Mul) {
$result = $operand1 * $operand2;
} elseif ($operation instanceof PhpParser\Node\Expr\BinaryOp\Pow) {
$result = $operand1 ** $operand2;
} elseif ($operation instanceof PhpParser\Node\Expr\BinaryOp\BitwiseOr) {
$result = $operand1 | $operand2;
} elseif ($operation instanceof PhpParser\Node\Expr\BinaryOp\BitwiseAnd) {
$result = $operand1 & $operand2;
} elseif ($operation instanceof PhpParser\Node\Expr\BinaryOp\BitwiseXor) {
$result = $operand1 ^ $operand2;
} elseif ($operation instanceof PhpParser\Node\Expr\BinaryOp\ShiftLeft) {
$result = $operand1 << $operand2;
} elseif ($operation instanceof PhpParser\Node\Expr\BinaryOp\ShiftRight) {
$result = $operand1 >> $operand2;
} elseif ($operation instanceof PhpParser\Node\Expr\BinaryOp\Div) {
if ($operand2 === 0) {
return Type::getNever();
}
$result = $operand1 / $operand2;
} else {
return null;
}
$calculated_type = self::getNumericalType($result);
if (!$allow_float_result && $calculated_type->isFloat()) {
return null;
}
return $calculated_type;
}
private static function analyzeOperandsBetweenIntRange(
PhpParser\Node $parent,
?Union &$result_type,
TIntRange $left_type_part,
TIntRange $right_type_part
): void {
if ($parent instanceof PhpParser\Node\Expr\BinaryOp\Div) {
//can't assume an int range will stay int after division
$result_type = Type::combineUnionTypes(
new Union([new TInt(), new TFloat()]),
$result_type
);
return;
}
if ($parent instanceof PhpParser\Node\Expr\BinaryOp\Mod) {
self::analyzeModBetweenIntRange($result_type, $left_type_part, $right_type_part);
return;
}
if ($parent instanceof PhpParser\Node\Expr\BinaryOp\BitwiseAnd ||
$parent instanceof PhpParser\Node\Expr\BinaryOp\BitwiseOr ||
$parent instanceof PhpParser\Node\Expr\BinaryOp\BitwiseXor
) {
//really complex to calculate
$result_type = Type::combineUnionTypes(
Type::getInt(),
$result_type
);
return;
}
if ($parent instanceof PhpParser\Node\Expr\BinaryOp\ShiftLeft ||
$parent instanceof PhpParser\Node\Expr\BinaryOp\ShiftRight
) {
//really complex to calculate
$result_type = Type::combineUnionTypes(
new Union([new TInt()]),
$result_type
);
return;
}
if ($parent instanceof PhpParser\Node\Expr\BinaryOp\Mul) {
self::analyzeMulBetweenIntRange($parent, $result_type, $left_type_part, $right_type_part);
return;
}
if ($parent instanceof PhpParser\Node\Expr\BinaryOp\Pow) {
self::analyzePowBetweenIntRange($result_type, $left_type_part, $right_type_part);
return;
}
if ($parent instanceof PhpParser\Node\Expr\BinaryOp\Minus) {
//for Minus, we have to assume the min is the min from first range minus the max from the second
$min_operand1 = $left_type_part->min_bound;
$min_operand2 = $right_type_part->max_bound;
//and the max is the max from first range minus the min from the second
$max_operand1 = $left_type_part->max_bound;
$max_operand2 = $right_type_part->min_bound;
} else {
$min_operand1 = $left_type_part->min_bound;
$min_operand2 = $right_type_part->min_bound;
$max_operand1 = $left_type_part->max_bound;
$max_operand2 = $right_type_part->max_bound;