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mirror of https://github.com/danog/psalm.git synced 2024-12-15 02:47:02 +01:00
psalm/src/Psalm/Checker/StatementsChecker.php
Matthew Brown 1ed61f42b9
Check outer scope for loop changes on break/continue (#1002)
* test

* Fix #1000 - check outer scope for loop changes on break/continue
2018-09-20 19:19:00 -04:00

1361 lines
52 KiB
PHP

<?php
namespace Psalm\Checker;
use PhpParser;
use Psalm\Checker\Statements\Block\DoChecker;
use Psalm\Checker\Statements\Block\ForChecker;
use Psalm\Checker\Statements\Block\ForeachChecker;
use Psalm\Checker\Statements\Block\IfChecker;
use Psalm\Checker\Statements\Block\SwitchChecker;
use Psalm\Checker\Statements\Block\TryChecker;
use Psalm\Checker\Statements\Block\WhileChecker;
use Psalm\Checker\Statements\Expression\Assignment\PropertyAssignmentChecker;
use Psalm\Checker\Statements\Expression\BinaryOpChecker;
use Psalm\Checker\Statements\Expression\CallChecker;
use Psalm\Checker\Statements\Expression\Fetch\ConstFetchChecker;
use Psalm\Checker\Statements\Expression\Fetch\VariableFetchChecker;
use Psalm\Checker\Statements\ExpressionChecker;
use Psalm\Checker\Statements\ReturnChecker;
use Psalm\Checker\Statements\ThrowChecker;
use Psalm\CodeLocation;
use Psalm\Config;
use Psalm\Context;
use Psalm\Exception\DocblockParseException;
use Psalm\FileManipulation\FileManipulation;
use Psalm\FileManipulation\FileManipulationBuffer;
use Psalm\Issue\ContinueOutsideLoop;
use Psalm\Issue\ForbiddenCode;
use Psalm\Issue\ForbiddenEcho;
use Psalm\Issue\InvalidDocblock;
use Psalm\Issue\InvalidGlobal;
use Psalm\Issue\UnevaluatedCode;
use Psalm\Issue\UnrecognizedStatement;
use Psalm\Issue\UnusedVariable;
use Psalm\IssueBuffer;
use Psalm\Scope\LoopScope;
use Psalm\StatementsSource;
use Psalm\Type;
class StatementsChecker extends SourceChecker implements StatementsSource
{
/**
* @var StatementsSource
*/
protected $source;
/**
* @var FileChecker
*/
protected $file_checker;
/**
* @var array<string, CodeLocation>
*/
private $all_vars = [];
/**
* @var array<string, int>
*/
private $var_branch_points = [];
/**
* Possibly undefined variables should be initialised if we're altering code
*
* @var array<string, int>|null
*/
private $vars_to_initialize;
/**
* @var array<string, FunctionChecker>
*/
private $function_checkers = [];
/**
* @var array<string, array{0: string, 1: CodeLocation}>
*/
private $unused_var_locations = [];
/**
* @var array<string, bool>
*/
private $used_var_locations = [];
/**
* @param StatementsSource $source
*/
public function __construct(StatementsSource $source)
{
$this->source = $source;
$this->file_checker = $source->getFileChecker();
}
/**
* Checks an array of statements for validity
*
* @param array<PhpParser\Node\Stmt> $stmts
* @param Context $context
* @param Context|null $global_context
* @param bool $root_scope
*
* @return null|false
*/
public function analyze(
array $stmts,
Context $context,
Context $global_context = null,
$root_scope = false
) {
$has_returned = false;
// hoist functions to the top
foreach ($stmts as $stmt) {
if ($stmt instanceof PhpParser\Node\Stmt\Function_) {
$function_checker = new FunctionChecker($stmt, $this->source);
$this->function_checkers[strtolower($stmt->name->name)] = $function_checker;
}
}
$project_checker = $this->getFileChecker()->project_checker;
$codebase = $project_checker->codebase;
if ($codebase->config->hoist_constants) {
foreach ($stmts as $stmt) {
if ($stmt instanceof PhpParser\Node\Stmt\Const_) {
foreach ($stmt->consts as $const) {
$this->setConstType(
$const->name->name,
self::getSimpleType($codebase, $const->value, $this->getAliases(), $this)
?: Type::getMixed(),
$context
);
}
} elseif ($stmt instanceof PhpParser\Node\Stmt\Expression
&& $stmt->expr instanceof PhpParser\Node\Expr\FuncCall
&& $stmt->expr->name instanceof PhpParser\Node\Name
&& $stmt->expr->name->parts === ['define']
&& isset($stmt->expr->args[1])
&& $stmt->expr->args[0]->value instanceof PhpParser\Node\Scalar\String_
) {
$const_name = $stmt->expr->args[0]->value->value;
$this->setConstType(
$const_name,
self::getSimpleType($codebase, $stmt->expr->args[1]->value, $this->getAliases(), $this)
?: Type::getMixed(),
$context
);
}
}
}
$original_context = null;
if ($context->loop_scope) {
$original_context = clone $context->loop_scope->loop_parent_context;
}
$plugin_classes = $codebase->config->after_statement_checks;
foreach ($stmts as $stmt) {
if ($has_returned && !($stmt instanceof PhpParser\Node\Stmt\Nop) &&
!($stmt instanceof PhpParser\Node\Stmt\InlineHTML)
) {
if ($context->collect_references) {
if (IssueBuffer::accepts(
new UnevaluatedCode(
'Expressions after return/throw/continue',
new CodeLocation($this->source, $stmt)
),
$this->source->getSuppressedIssues()
)) {
return false;
}
}
break;
}
if ($project_checker->debug_lines) {
echo $this->getFilePath() . ':' . $stmt->getLine() . "\n";
}
/*
if (isset($context->vars_in_scope['$array']) && !$stmt instanceof PhpParser\Node\Stmt\Nop) {
var_dump($stmt->getLine(), $context->vars_in_scope['$array']);
}
*/
$new_issues = null;
if ($docblock = $stmt->getDocComment()) {
$comments = CommentChecker::parseDocComment((string)$docblock);
if (isset($comments['specials']['psalm-suppress'])) {
$suppressed = array_filter(
array_map(
/**
* @param string $line
*
* @return string
*/
function ($line) {
return explode(' ', trim($line))[0];
},
$comments['specials']['psalm-suppress']
)
);
if ($suppressed) {
$new_issues = array_diff($suppressed, $this->source->getSuppressedIssues());
/** @psalm-suppress MixedTypeCoercion */
$this->addSuppressedIssues($new_issues);
}
}
}
if ($stmt instanceof PhpParser\Node\Stmt\If_) {
if (IfChecker::analyze($this, $stmt, $context) === false) {
return false;
}
} elseif ($stmt instanceof PhpParser\Node\Stmt\TryCatch) {
if (TryChecker::analyze($this, $stmt, $context) === false) {
return false;
}
} elseif ($stmt instanceof PhpParser\Node\Stmt\For_) {
if (ForChecker::analyze($this, $stmt, $context) === false) {
return false;
}
} elseif ($stmt instanceof PhpParser\Node\Stmt\Foreach_) {
if (ForeachChecker::analyze($this, $stmt, $context) === false) {
return false;
}
} elseif ($stmt instanceof PhpParser\Node\Stmt\While_) {
if (WhileChecker::analyze($this, $stmt, $context) === false) {
return false;
}
} elseif ($stmt instanceof PhpParser\Node\Stmt\Do_) {
DoChecker::analyze($this, $stmt, $context);
} elseif ($stmt instanceof PhpParser\Node\Stmt\Const_) {
$this->analyzeConstAssignment($stmt, $context);
} elseif ($stmt instanceof PhpParser\Node\Stmt\Unset_) {
$context->inside_unset = true;
foreach ($stmt->vars as $var) {
ExpressionChecker::analyze($this, $var, $context);
$var_id = ExpressionChecker::getArrayVarId(
$var,
$this->getFQCLN(),
$this
);
if ($var_id) {
$context->remove($var_id);
if ($var instanceof PhpParser\Node\Expr\ArrayDimFetch
&& $var->dim
&& ($var->dim instanceof PhpParser\Node\Scalar\String_
|| $var->dim instanceof PhpParser\Node\Scalar\LNumber
)
) {
$root_var_id = ExpressionChecker::getArrayVarId(
$var->var,
$this->getFQCLN(),
$this
);
if ($root_var_id && isset($context->vars_in_scope[$root_var_id])) {
$root_type = clone $context->vars_in_scope[$root_var_id];
foreach ($root_type->getTypes() as $atomic_root_type) {
if ($atomic_root_type instanceof Type\Atomic\ObjectLike) {
if (isset($atomic_root_type->properties[$var->dim->value])) {
unset($atomic_root_type->properties[$var->dim->value]);
}
if (!$atomic_root_type->properties) {
$root_type->addType(
new Type\Atomic\TArray([
new Type\Union([new Type\Atomic\TEmpty]),
new Type\Union([new Type\Atomic\TEmpty]),
])
);
}
}
}
$context->vars_in_scope[$root_var_id] = $root_type;
}
}
}
}
$context->inside_unset = false;
} elseif ($stmt instanceof PhpParser\Node\Stmt\Return_) {
$has_returned = true;
ReturnChecker::analyze($this, $project_checker, $stmt, $context);
} elseif ($stmt instanceof PhpParser\Node\Stmt\Throw_) {
$has_returned = true;
ThrowChecker::analyze($this, $stmt, $context);
} elseif ($stmt instanceof PhpParser\Node\Stmt\Switch_) {
SwitchChecker::analyze($this, $stmt, $context);
} elseif ($stmt instanceof PhpParser\Node\Stmt\Break_) {
$loop_scope = $context->loop_scope;
if ($loop_scope && $original_context) {
$loop_scope->final_actions[] = ScopeChecker::ACTION_BREAK;
$redefined_vars = $context->getRedefinedVars($loop_scope->loop_parent_context->vars_in_scope);
if ($loop_scope->possibly_redefined_loop_parent_vars === null) {
$loop_scope->possibly_redefined_loop_parent_vars = $redefined_vars;
} else {
foreach ($redefined_vars as $var => $type) {
if ($type->isMixed()) {
$loop_scope->possibly_redefined_loop_parent_vars[$var] = $type;
} elseif (isset($loop_scope->possibly_redefined_loop_parent_vars[$var])) {
$loop_scope->possibly_redefined_loop_parent_vars[$var] = Type::combineUnionTypes(
$type,
$loop_scope->possibly_redefined_loop_parent_vars[$var]
);
} else {
$loop_scope->possibly_redefined_loop_parent_vars[$var] = $type;
}
}
}
if ($context->collect_references && (!$context->switch_scope || $stmt->num)) {
foreach ($context->unreferenced_vars as $var_id => $locations) {
if (isset($loop_scope->unreferenced_vars[$var_id])) {
$loop_scope->unreferenced_vars[$var_id] += $locations;
} else {
$loop_scope->unreferenced_vars[$var_id] = $locations;
}
}
}
}
$switch_scope = $context->switch_scope;
if ($switch_scope && $context->collect_references) {
foreach ($context->unreferenced_vars as $var_id => $locations) {
if (isset($switch_scope->unreferenced_vars[$var_id])) {
$switch_scope->unreferenced_vars[$var_id] += $locations;
} else {
$switch_scope->unreferenced_vars[$var_id] = $locations;
}
}
}
$has_returned = true;
} elseif ($stmt instanceof PhpParser\Node\Stmt\Continue_) {
$loop_scope = $context->loop_scope;
if ($loop_scope === null) {
if (!$context->inside_case) {
if (IssueBuffer::accepts(
new ContinueOutsideLoop(
'Continue call outside loop context',
new CodeLocation($this->source, $stmt)
),
$this->source->getSuppressedIssues()
)) {
return false;
}
}
} elseif ($original_context) {
$loop_scope->final_actions[] = ScopeChecker::ACTION_CONTINUE;
$redefined_vars = $context->getRedefinedVars($original_context->vars_in_scope);
if ($loop_scope->redefined_loop_vars === null) {
$loop_scope->redefined_loop_vars = $redefined_vars;
} else {
foreach ($loop_scope->redefined_loop_vars as $redefined_var => $type) {
if (!isset($redefined_vars[$redefined_var])) {
unset($loop_scope->redefined_loop_vars[$redefined_var]);
} else {
$loop_scope->redefined_loop_vars[$redefined_var] = Type::combineUnionTypes(
$redefined_vars[$redefined_var],
$type
);
}
}
}
foreach ($redefined_vars as $var => $type) {
if ($type->isMixed()) {
$loop_scope->possibly_redefined_loop_vars[$var] = $type;
} elseif (isset($loop_scope->possibly_redefined_loop_vars[$var])) {
$loop_scope->possibly_redefined_loop_vars[$var] = Type::combineUnionTypes(
$type,
$loop_scope->possibly_redefined_loop_vars[$var]
);
} else {
$loop_scope->possibly_redefined_loop_vars[$var] = $type;
}
}
if ($context->collect_references && (!$context->switch_scope || $stmt->num)) {
foreach ($context->unreferenced_vars as $var_id => $locations) {
if (isset($loop_scope->possibly_unreferenced_vars[$var_id])) {
$loop_scope->possibly_unreferenced_vars[$var_id] += $locations;
} else {
$loop_scope->possibly_unreferenced_vars[$var_id] = $locations;
}
}
}
}
$switch_scope = $context->switch_scope;
if ($switch_scope && $context->collect_references) {
foreach ($context->unreferenced_vars as $var_id => $locations) {
if (isset($switch_scope->unreferenced_vars[$var_id])) {
$switch_scope->unreferenced_vars[$var_id] += $locations;
} else {
$switch_scope->unreferenced_vars[$var_id] = $locations;
}
}
}
$has_returned = true;
} elseif ($stmt instanceof PhpParser\Node\Stmt\Static_) {
$this->analyzeStatic($stmt, $context);
} elseif ($stmt instanceof PhpParser\Node\Stmt\Echo_) {
foreach ($stmt->exprs as $i => $expr) {
ExpressionChecker::analyze($this, $expr, $context);
if (isset($expr->inferredType)) {
if (CallChecker::checkFunctionArgumentType(
$this,
$expr->inferredType,
Type::getString(),
'echo',
(int)$i,
new CodeLocation($this->getSource(), $expr),
$expr,
$context
) === false) {
return false;
}
}
}
if ($codebase->config->forbid_echo) {
if (IssueBuffer::accepts(
new ForbiddenEcho(
'Use of echo',
new CodeLocation($this->source, $stmt)
),
$this->source->getSuppressedIssues()
)) {
return false;
}
} elseif (isset($codebase->config->forbidden_functions['echo'])) {
if (IssueBuffer::accepts(
new ForbiddenCode(
'Use of echo',
new CodeLocation($this->source, $stmt)
),
$this->source->getSuppressedIssues()
)) {
return false;
}
}
} elseif ($stmt instanceof PhpParser\Node\Stmt\Function_) {
foreach ($stmt->stmts as $function_stmt) {
if ($function_stmt instanceof PhpParser\Node\Stmt\Global_) {
foreach ($function_stmt->vars as $var) {
if ($var instanceof PhpParser\Node\Expr\Variable) {
if (is_string($var->name)) {
$var_id = '$' . $var->name;
// registers variable in global context
$context->hasVariable($var_id, $this);
}
}
}
} elseif (!$function_stmt instanceof PhpParser\Node\Stmt\Nop) {
break;
}
}
if (!$project_checker->codebase->register_stub_files
&& !$project_checker->codebase->register_autoload_files
) {
$function_id = strtolower($stmt->name->name);
$function_context = new Context($context->self);
$config = Config::getInstance();
$function_context->collect_references = $project_checker->codebase->collect_references;
$function_context->collect_exceptions = $config->check_for_throws_docblock;
$this->function_checkers[$function_id]->analyze($function_context, $context);
if ($config->reportIssueInFile('InvalidReturnType', $this->getFilePath())) {
$method_id = $this->function_checkers[$function_id]->getMethodId();
$function_storage = $codebase->functions->getStorage(
$this,
$method_id
);
$return_type = $function_storage->return_type;
$return_type_location = $function_storage->return_type_location;
$this->function_checkers[$function_id]->verifyReturnType(
$this,
$return_type,
$this->getFQCLN(),
$return_type_location
);
}
}
} elseif ($stmt instanceof PhpParser\Node\Stmt\Expression) {
if (ExpressionChecker::analyze($this, $stmt->expr, $context, false, $global_context) === false) {
return false;
}
} elseif ($stmt instanceof PhpParser\Node\Stmt\InlineHTML) {
// do nothing
} elseif ($stmt instanceof PhpParser\Node\Stmt\Global_) {
if (!$context->collect_initializations && !$global_context) {
if (IssueBuffer::accepts(
new InvalidGlobal(
'Cannot use global scope here',
new CodeLocation($this->source, $stmt)
),
$this->source->getSuppressedIssues()
)) {
// fall through
}
}
$source = $this->getSource();
$function_storage = $source instanceof FunctionLikeChecker
? $source->getFunctionLikeStorage($this)
: null;
foreach ($stmt->vars as $var) {
if ($var instanceof PhpParser\Node\Expr\Variable) {
if (is_string($var->name)) {
$var_id = '$' . $var->name;
if ($var->name === 'argv' || $var->name === 'argc') {
if ($var->name === 'argv') {
$context->vars_in_scope[$var_id] = new Type\Union([
new Type\Atomic\TArray([
Type::getInt(),
Type::getString(),
]),
]);
} else {
$context->vars_in_scope[$var_id] = Type::getInt();
}
} elseif (isset($function_storage->global_types[$var_id])) {
$context->vars_in_scope[$var_id] = clone $function_storage->global_types[$var_id];
$context->vars_possibly_in_scope[$var_id] = true;
} else {
$context->vars_in_scope[$var_id] =
$global_context && $global_context->hasVariable($var_id, $this)
? clone $global_context->vars_in_scope[$var_id]
: Type::getMixed();
$context->vars_possibly_in_scope[$var_id] = true;
}
}
}
}
} elseif ($stmt instanceof PhpParser\Node\Stmt\Property) {
foreach ($stmt->props as $prop) {
if ($prop->default) {
ExpressionChecker::analyze($this, $prop->default, $context);
if (isset($prop->default->inferredType)) {
if (!$stmt->isStatic()) {
if (PropertyAssignmentChecker::analyzeInstance(
$this,
$prop,
$prop->name->name,
$prop->default,
$prop->default->inferredType,
$context
) === false) {
// fall through
}
}
}
}
}
} elseif ($stmt instanceof PhpParser\Node\Stmt\ClassConst) {
$const_visibility = \ReflectionProperty::IS_PUBLIC;
if ($stmt->isProtected()) {
$const_visibility = \ReflectionProperty::IS_PROTECTED;
}
if ($stmt->isPrivate()) {
$const_visibility = \ReflectionProperty::IS_PRIVATE;
}
foreach ($stmt->consts as $const) {
ExpressionChecker::analyze($this, $const->value, $context);
if (isset($const->value->inferredType) && !$const->value->inferredType->isMixed()) {
$codebase->classlikes->setConstantType(
(string)$this->getFQCLN(),
$const->name->name,
$const->value->inferredType,
$const_visibility
);
}
}
} elseif ($stmt instanceof PhpParser\Node\Stmt\Class_) {
try {
$class_checker = new ClassChecker($stmt, $this->source, $stmt->name ? $stmt->name->name : null);
$class_checker->analyze(null, $global_context);
} catch (\InvalidArgumentException $e) {
// disregard this exception, we'll likely see it elsewhere in the form
// of an issue
}
} elseif ($stmt instanceof PhpParser\Node\Stmt\Nop) {
if ((string)$stmt->getDocComment()) {
$var_comments = [];
try {
$var_comments = CommentChecker::getTypeFromComment(
(string)$stmt->getDocComment(),
$this->getSource(),
$this->getSource()->getAliases()
);
} catch (DocblockParseException $e) {
if (IssueBuffer::accepts(
new InvalidDocblock(
(string)$e->getMessage(),
new CodeLocation($this->getSource(), $stmt, null, true)
)
)) {
// fall through
}
}
foreach ($var_comments as $var_comment) {
if (!$var_comment->var_id) {
continue;
}
$comment_type = ExpressionChecker::fleshOutType(
$project_checker,
$var_comment->type,
$context->self
);
$context->vars_in_scope[$var_comment->var_id] = $comment_type;
}
}
} elseif ($stmt instanceof PhpParser\Node\Stmt\Goto_) {
// do nothing
} elseif ($stmt instanceof PhpParser\Node\Stmt\Label) {
// do nothing
} elseif ($stmt instanceof PhpParser\Node\Stmt\Declare_) {
foreach ($stmt->declares as $declaration) {
if ((string) $declaration->key === 'strict_types'
&& $declaration->value instanceof PhpParser\Node\Scalar\LNumber
&& $declaration->value->value === 1
) {
$context->strict_types = true;
}
}
} else {
if (IssueBuffer::accepts(
new UnrecognizedStatement(
'Psalm does not understand ' . get_class($stmt),
new CodeLocation($this->source, $stmt)
),
$this->getSuppressedIssues()
)) {
return false;
}
}
if ($context->loop_scope
&& $context->loop_scope->final_actions
&& !in_array(ScopeChecker::ACTION_NONE, $context->loop_scope->final_actions, true)
) {
//$has_returned = true;
}
if ($plugin_classes) {
$file_manipulations = [];
$code_location = new CodeLocation($this->source, $stmt);
foreach ($plugin_classes as $plugin_fq_class_name) {
if ($plugin_fq_class_name::afterStatementCheck(
$this,
$stmt,
$context,
$code_location,
$this->getSuppressedIssues(),
$file_manipulations
) === false) {
return false;
}
}
if ($file_manipulations) {
/** @psalm-suppress MixedTypeCoercion */
FileManipulationBuffer::add($this->getFilePath(), $file_manipulations);
}
}
if ($new_issues) {
/** @psalm-suppress MixedTypeCoercion */
$this->removeSuppressedIssues($new_issues);
}
}
if ($root_scope
&& $context->collect_references
&& !$context->collect_initializations
&& $project_checker->codebase->find_unused_code
&& $context->check_variables
) {
$this->checkUnreferencedVars();
}
if ($project_checker->alter_code && $root_scope && $this->vars_to_initialize) {
$file_contents = $project_checker->codebase->getFileContents($this->getFilePath());
foreach ($this->vars_to_initialize as $var_id => $branch_point) {
$newline_pos = (int)strrpos($file_contents, "\n", $branch_point - strlen($file_contents)) + 1;
$indentation = substr($file_contents, $newline_pos, $branch_point - $newline_pos);
FileManipulationBuffer::add($this->getFilePath(), [
new FileManipulation($branch_point, $branch_point, $var_id . ' = null;' . "\n" . $indentation),
]);
}
}
return null;
}
/**
* @return void
*/
public function checkUnreferencedVars()
{
$source = $this->getSource();
$function_storage = $source instanceof FunctionLikeChecker ? $source->getFunctionLikeStorage($this) : null;
foreach ($this->unused_var_locations as $hash => list($var_id, $original_location)) {
if ($var_id === '$_' || isset($this->used_var_locations[$hash])) {
continue;
}
if (!$function_storage || !array_key_exists(substr($var_id, 1), $function_storage->param_types)) {
if (IssueBuffer::accepts(
new UnusedVariable(
'Variable ' . $var_id . ' is never referenced',
$original_location
),
$this->getSuppressedIssues()
)) {
// fall through
}
}
}
}
/**
* @param PhpParser\Node\Stmt\Static_ $stmt
* @param Context $context
*
* @return false|null
*/
private function analyzeStatic(PhpParser\Node\Stmt\Static_ $stmt, Context $context)
{
foreach ($stmt->vars as $var) {
if ($var->default) {
if (ExpressionChecker::analyze($this, $var->default, $context) === false) {
return false;
}
}
if ($context->check_variables) {
if (!is_string($var->var->name)) {
continue;
}
$var_id = '$' . $var->var->name;
$context->vars_in_scope[$var_id] = Type::getMixed();
$context->vars_possibly_in_scope[$var_id] = true;
$context->assigned_var_ids[$var_id] = true;
$location = new CodeLocation($this, $stmt);
if ($context->collect_references) {
$context->unreferenced_vars[$var_id] = [$location->getHash() => $location];
}
$this->registerVariable(
$var_id,
$location,
$context->branch_point
);
}
}
return null;
}
/**
* @param PhpParser\Node\Expr $stmt
* @param ?array<string, Type\Union> $existing_class_constants
* @param string $fq_classlike_name
*
* @return Type\Union|null
*/
public static function getSimpleType(
\Psalm\Codebase $codebase,
PhpParser\Node\Expr $stmt,
\Psalm\Aliases $aliases,
\Psalm\FileSource $file_source = null,
array $existing_class_constants = null,
$fq_classlike_name = null
) {
if ($stmt instanceof PhpParser\Node\Expr\BinaryOp) {
if ($stmt instanceof PhpParser\Node\Expr\BinaryOp\Concat) {
return Type::getString();
}
if ($stmt instanceof PhpParser\Node\Expr\BinaryOp\BooleanAnd
|| $stmt instanceof PhpParser\Node\Expr\BinaryOp\BooleanOr
|| $stmt instanceof PhpParser\Node\Expr\BinaryOp\LogicalAnd
|| $stmt instanceof PhpParser\Node\Expr\BinaryOp\LogicalOr
|| $stmt instanceof PhpParser\Node\Expr\BinaryOp\Equal
|| $stmt instanceof PhpParser\Node\Expr\BinaryOp\NotEqual
|| $stmt instanceof PhpParser\Node\Expr\BinaryOp\Identical
|| $stmt instanceof PhpParser\Node\Expr\BinaryOp\NotIdentical
|| $stmt instanceof PhpParser\Node\Expr\BinaryOp\Greater
|| $stmt instanceof PhpParser\Node\Expr\BinaryOp\GreaterOrEqual
|| $stmt instanceof PhpParser\Node\Expr\BinaryOp\Smaller
|| $stmt instanceof PhpParser\Node\Expr\BinaryOp\SmallerOrEqual
) {
return Type::getBool();
}
if ($stmt instanceof PhpParser\Node\Expr\BinaryOp\Coalesce) {
return null;
}
if ($stmt instanceof PhpParser\Node\Expr\BinaryOp\Spaceship) {
return Type::getInt();
}
$stmt->left->inferredType = self::getSimpleType(
$codebase,
$stmt->left,
$aliases,
$file_source,
$existing_class_constants,
$fq_classlike_name
);
$stmt->right->inferredType = self::getSimpleType(
$codebase,
$stmt->right,
$aliases,
$file_source,
$existing_class_constants,
$fq_classlike_name
);
if (!$stmt->left->inferredType || !$stmt->right->inferredType) {
return null;
}
if ($stmt instanceof PhpParser\Node\Expr\BinaryOp\Plus ||
$stmt instanceof PhpParser\Node\Expr\BinaryOp\Minus ||
$stmt instanceof PhpParser\Node\Expr\BinaryOp\Mod ||
$stmt instanceof PhpParser\Node\Expr\BinaryOp\Mul ||
$stmt instanceof PhpParser\Node\Expr\BinaryOp\Pow
) {
BinaryOpChecker::analyzeNonDivArithmenticOp(
$file_source instanceof StatementsSource ? $file_source : null,
$stmt->left,
$stmt->right,
$stmt,
$result_type
);
if ($result_type) {
return $result_type;
}
return null;
}
if ($stmt instanceof PhpParser\Node\Expr\BinaryOp\Div
&& ($stmt->left->inferredType->hasInt() || $stmt->left->inferredType->hasFloat())
&& ($stmt->right->inferredType->hasInt() || $stmt->right->inferredType->hasFloat())
) {
return Type::combineUnionTypes(Type::getFloat(), Type::getInt());
}
}
if ($stmt instanceof PhpParser\Node\Expr\ConstFetch) {
if (strtolower($stmt->name->parts[0]) === 'false') {
return Type::getFalse();
} elseif (strtolower($stmt->name->parts[0]) === 'true') {
return Type::getBool();
} elseif (strtolower($stmt->name->parts[0]) === 'null') {
return Type::getNull();
}
return null;
}
if ($stmt instanceof PhpParser\Node\Expr\ClassConstFetch) {
if ($stmt->class instanceof PhpParser\Node\Name
&& $stmt->name instanceof PhpParser\Node\Identifier
&& $fq_classlike_name
&& $stmt->class->parts !== ['static']
&& $stmt->class->parts !== ['parent']
) {
if (isset($existing_class_constants[$stmt->name->name])) {
if ($stmt->class->parts === ['self']) {
return clone $existing_class_constants[$stmt->name->name];
}
}
if ($stmt->class->parts === ['self']) {
$const_fq_class_name = $fq_classlike_name;
} else {
$const_fq_class_name = ClassLikeChecker::getFQCLNFromNameObject(
$stmt->class,
$aliases
);
}
if (strtolower($const_fq_class_name) === strtolower($fq_classlike_name)
&& isset($existing_class_constants[$stmt->name->name])
) {
return clone $existing_class_constants[$stmt->name->name];
}
if (strtolower($stmt->name->name) === 'class') {
return Type::getClassString($const_fq_class_name);
}
if ($existing_class_constants === null) {
try {
$foreign_class_constants = $codebase->classlikes->getConstantsForClass(
$const_fq_class_name,
\ReflectionProperty::IS_PRIVATE
);
if (isset($foreign_class_constants[$stmt->name->name])) {
return clone $foreign_class_constants[$stmt->name->name];
}
return null;
} catch (\InvalidArgumentException $e) {
return null;
}
}
}
if ($stmt->name instanceof PhpParser\Node\Identifier && strtolower($stmt->name->name) === 'class') {
return Type::getClassString();
}
return null;
}
if ($stmt instanceof PhpParser\Node\Scalar\String_) {
return Type::getString(strlen($stmt->value) < 30 ? $stmt->value : null);
}
if ($stmt instanceof PhpParser\Node\Scalar\LNumber) {
return Type::getInt(false, $stmt->value);
}
if ($stmt instanceof PhpParser\Node\Scalar\DNumber) {
return Type::getFloat($stmt->value);
}
if ($stmt instanceof PhpParser\Node\Expr\Array_) {
if (count($stmt->items) === 0) {
return Type::getEmptyArray();
}
$item_key_type = null;
$item_value_type = null;
$property_types = [];
$class_strings = [];
$can_create_objectlike = true;
foreach ($stmt->items as $int_offset => $item) {
if ($item === null) {
continue;
}
if ($item->key) {
$single_item_key_type = self::getSimpleType(
$codebase,
$item->key,
$aliases,
$file_source,
$existing_class_constants,
$fq_classlike_name
);
if ($single_item_key_type) {
if ($item_key_type) {
$item_key_type = Type::combineUnionTypes($single_item_key_type, $item_key_type);
} else {
$item_key_type = $single_item_key_type;
}
}
} else {
$item_key_type = Type::getInt();
}
if ($item_value_type && !$can_create_objectlike) {
continue;
}
$single_item_value_type = self::getSimpleType(
$codebase,
$item->value,
$aliases,
$file_source,
$existing_class_constants,
$fq_classlike_name
);
if (!$single_item_value_type) {
return null;
}
if ($item->key instanceof PhpParser\Node\Scalar\String_
|| $item->key instanceof PhpParser\Node\Scalar\LNumber
|| !$item->key
) {
$property_types[$item->key ? $item->key->value : $int_offset] = $single_item_value_type;
} else {
$dim_type = self::getSimpleType(
$codebase,
$item->key,
$aliases,
$file_source,
$existing_class_constants,
$fq_classlike_name
);
if (!$dim_type) {
return null;
}
$dim_atomic_types = $dim_type->getTypes();
if (count($dim_atomic_types) > 1 || $dim_type->isMixed()) {
$can_create_objectlike = false;
} else {
$atomic_type = array_shift($dim_atomic_types);
if ($atomic_type instanceof Type\Atomic\TLiteralInt
|| $atomic_type instanceof Type\Atomic\TLiteralString
) {
if ($atomic_type instanceof Type\Atomic\TLiteralClassString) {
$class_strings[$atomic_type->value] = true;
}
$property_types[$atomic_type->value] = $single_item_value_type;
} else {
$can_create_objectlike = false;
}
}
}
if ($item_value_type) {
$item_value_type = Type::combineUnionTypes($single_item_value_type, $item_value_type);
} else {
$item_value_type = $single_item_value_type;
}
}
// if this array looks like an object-like array, let's return that instead
if ($item_value_type
&& $item_key_type
&& ($item_key_type->hasString() || $item_key_type->hasInt())
&& $can_create_objectlike
) {
return new Type\Union([new Type\Atomic\ObjectLike($property_types, $class_strings)]);
}
if (!$item_key_type || !$item_value_type) {
return null;
}
return new Type\Union([
new Type\Atomic\TArray([
$item_key_type,
$item_value_type,
]),
]);
}
if ($stmt instanceof PhpParser\Node\Expr\Cast\Int_) {
return Type::getInt();
}
if ($stmt instanceof PhpParser\Node\Expr\Cast\Double) {
return Type::getFloat();
}
if ($stmt instanceof PhpParser\Node\Expr\Cast\Bool_) {
return Type::getBool();
}
if ($stmt instanceof PhpParser\Node\Expr\Cast\String_) {
return Type::getString();
}
if ($stmt instanceof PhpParser\Node\Expr\Cast\Object_) {
return Type::getObject();
}
if ($stmt instanceof PhpParser\Node\Expr\Cast\Array_) {
return Type::getArray();
}
if ($stmt instanceof PhpParser\Node\Expr\UnaryMinus || $stmt instanceof PhpParser\Node\Expr\UnaryPlus) {
$type_to_invert = self::getSimpleType(
$codebase,
$stmt->expr,
$aliases,
$file_source,
$existing_class_constants,
$fq_classlike_name
);
if (!$type_to_invert) {
return null;
}
foreach ($type_to_invert->getTypes() as $type_part) {
if ($type_part instanceof Type\Atomic\TLiteralInt
&& $stmt instanceof PhpParser\Node\Expr\UnaryMinus
) {
$type_part->value = -$type_part->value;
} elseif ($type_part instanceof Type\Atomic\TLiteralFloat
&& $stmt instanceof PhpParser\Node\Expr\UnaryMinus
) {
$type_part->value = -$type_part->value;
}
}
return $type_to_invert;
}
return null;
}
/**
* @param PhpParser\Node\Stmt\Const_ $stmt
* @param Context $context
*
* @return void
*/
private function analyzeConstAssignment(PhpParser\Node\Stmt\Const_ $stmt, Context $context)
{
foreach ($stmt->consts as $const) {
ExpressionChecker::analyze($this, $const->value, $context);
$this->setConstType(
$const->name->name,
isset($const->value->inferredType) ? $const->value->inferredType : Type::getMixed(),
$context
);
}
}
/**
* @param string $const_name
* @param bool $is_fully_qualified
* @param Context $context
*
* @return Type\Union|null
*/
public function getConstType(
StatementsChecker $statements_checker,
$const_name,
$is_fully_qualified,
Context $context
) {
$fq_const_name = null;
$aliased_constants = $this->getAliases()->constants;
if (isset($aliased_constants[$const_name])) {
$fq_const_name = $aliased_constants[$const_name];
} elseif ($is_fully_qualified) {
$fq_const_name = $const_name;
} elseif (strpos($const_name, '\\')) {
$fq_const_name = Type::getFQCLNFromString($const_name, $this->getAliases());
}
if ($fq_const_name) {
$const_name_parts = explode('\\', $fq_const_name);
$const_name = array_pop($const_name_parts);
$namespace_name = implode('\\', $const_name_parts);
$namespace_constants = NamespaceChecker::getConstantsForNamespace(
$namespace_name,
\ReflectionProperty::IS_PUBLIC
);
if (isset($namespace_constants[$const_name])) {
return $namespace_constants[$const_name];
}
}
if ($context->hasVariable($const_name, $statements_checker)) {
return $context->vars_in_scope[$const_name];
}
$file_path = $statements_checker->getRootFilePath();
$project_checker = $statements_checker->getFileChecker()->project_checker;
$file_storage_provider = $project_checker->file_storage_provider;
$file_storage = $file_storage_provider->get($file_path);
if (isset($file_storage->declaring_constants[$const_name])) {
$constant_file_path = $file_storage->declaring_constants[$const_name];
return $file_storage_provider->get($constant_file_path)->constants[$const_name];
}
return ConstFetchChecker::getGlobalConstType($project_checker->codebase, $fq_const_name, $const_name);
}
/**
* @param string $const_name
* @param Type\Union $const_type
* @param Context $context
*
* @return void
*/
public function setConstType($const_name, Type\Union $const_type, Context $context)
{
$context->vars_in_scope[$const_name] = $const_type;
$context->constants[$const_name] = $const_type;
if ($this->source instanceof NamespaceChecker) {
$this->source->setConstType($const_name, $const_type);
}
}
/**
* @param string $var_name
*
* @return bool
*/
public function hasVariable($var_name)
{
return isset($this->all_vars[$var_name]);
}
/**
* @param string $var_id
* @param CodeLocation $location
* @param int|null $branch_point
*
* @return void
*/
public function registerVariable($var_id, CodeLocation $location, $branch_point)
{
$this->all_vars[$var_id] = $location;
if ($branch_point) {
$this->var_branch_points[$var_id] = $branch_point;
}
$this->registerVariableAssignment($var_id, $location);
}
/**
* @param string $var_id
* @param CodeLocation $location
*
* @return void
*/
public function registerVariableAssignment($var_id, CodeLocation $location)
{
$this->unused_var_locations[$location->getHash()] = [$var_id, $location];
}
/**
* @param array<string, CodeLocation> $locations
* @return void
*/
public function registerVariableUses(array $locations)
{
foreach ($locations as $hash => $_) {
unset($this->unused_var_locations[$hash]);
$this->used_var_locations[$hash] = true;
}
}
/**
* @return array<string, array{0: string, 1: CodeLocation}>
*/
public function getUnusedVarLocations()
{
return $this->unused_var_locations;
}
/**
* The first appearance of the variable in this set of statements being evaluated
*
* @param string $var_id
*
* @return CodeLocation|null
*/
public function getFirstAppearance($var_id)
{
return isset($this->all_vars[$var_id]) ? $this->all_vars[$var_id] : null;
}
/**
* @param string $var_id
*
* @return int|null
*/
public function getBranchPoint($var_id)
{
return isset($this->var_branch_points[$var_id]) ? $this->var_branch_points[$var_id] : null;
}
/**
* @param string $var_id
* @param int $branch_point
*
* @return void
*/
public function addVariableInitialization($var_id, $branch_point)
{
$this->vars_to_initialize[$var_id] = $branch_point;
}
/**
* @return FileChecker
*/
public function getFileChecker()
{
return $this->file_checker;
}
/**
* @return array<string, FunctionChecker>
*/
public function getFunctionCheckers()
{
return $this->function_checkers;
}
}