/**
* @param Node $node
* A node to parse
*
* @return Context
* A new or an unchanged context resulting from
* parsing the node
*/
public function visitCall(Node $node) : Context
{
$expression = $node->children['expr'];
(new ContextNode($this->code_base, $this->context, $node))->analyzeBackwardCompatibility();
foreach ($node->children['args']->children ?? [] as $arg_node) {
if ($arg_node instanceof Node) {
(new ContextNode($this->code_base, $this->context, $arg_node))->analyzeBackwardCompatibility();
}
}
if ($expression->kind == \ast\AST_VAR) {
$variable_name = (new ContextNode($this->code_base, $this->context, $expression))->getVariableName();
if (empty($variable_name)) {
return $this->context;
}
// $var() - hopefully a closure, otherwise we don't know
if ($this->context->getScope()->hasVariableWithName($variable_name)) {
$variable = $this->context->getScope()->getVariableWithName($variable_name);
$union_type = $variable->getUnionType();
if ($union_type->isEmpty()) {
return $this->context;
}
foreach ($union_type->getTypeSet() as $type) {
if (!$type instanceof CallableType) {
continue;
}
$closure_fqsen = FullyQualifiedFunctionName::fromFullyQualifiedString((string) $type->asFQSEN());
if ($this->code_base->hasMethod($closure_fqsen)) {
// Get the closure
$method = $this->code_base->getMethod($closure_fqsen);
// Check the call for paraemter and argument types
$this->analyzeCallToMethod($this->code_base, $method, $node);
}
}
}
} else {
if ($expression->kind == \ast\AST_NAME) {
try {
$method = (new ContextNode($this->code_base, $this->context, $expression))->getFunction($expression->children['name'] ?? $expression->children['method']);
} catch (IssueException $exception) {
$exception->getIssueInstance()();
return $this->context;
}
// Check the call for paraemter and argument types
$this->analyzeCallToMethod($this->code_base, $method, $node);
} else {
if ($expression->kind == \ast\AST_CALL || $expression->kind == \ast\AST_STATIC_CALL || $expression->kind == \ast\AST_NEW || $expression->kind == \ast\AST_METHOD_CALL) {
$class_list = (new ContextNode($this->code_base, $this->context, $expression))->getClassList();
foreach ($class_list as $class) {
if (!$class->hasMethodWithName($this->code_base, '__invoke')) {
continue;
}
$method = $class->getMethodByNameInContext($this->code_base, '__invoke', $this->context);
// Check the call for paraemter and argument types
$this->analyzeCallToMethod($this->code_base, $method, $node);
}
}
}
}
return $this->context;
}
/**
* Visit a node with kind `\ast\AST_STATIC_CALL`
*
* @param Node $node
* A node of the type indicated by the method name that we'd
* like to figure out the type that it produces.
*
* @return UnionType
* The set of types that are possibly produced by the
* given node
*/
public function visitStaticCall(Node $node) : UnionType
{
try {
$class_name = AST::classNameFromNode($this->context, $this->code_base, $node);
} catch (TypeException $exception) {
return new UnionType();
}
if (!$class_name) {
return new UnionType();
}
$method_name = $node->children['method'];
// Give up on any complicated nonsense where the
// method name is a variable such as in
// `$variable->$function_name()`.
if ($method_name instanceof Node) {
return new UnionType();
}
// Method names can some times turn up being
// other method calls.
assert(is_string($method_name), "Method name must be a string. Something else given.");
$method_fqsen = FullyQualifiedMethodName::make(FullyQualifiedClassName::fromStringInContext($class_name, $this->context), $method_name);
if (!$this->code_base->hasMethod($method_fqsen)) {
return new UnionType();
}
$method = $this->code_base->getMethod($method_fqsen);
return $method->getUnionType();
}
/**
* @return Method
*/
public function getClosure() : Func
{
$closure_fqsen = FullyQualifiedFunctionName::fromClosureInContext($this->context);
if (!$this->code_base->hasMethod($closure_fqsen)) {
throw new CodeBaseException($closure_fqsen, "Could not find closure {$closure_fqsen}");
}
return $this->code_base->getMethod($closure_fqsen);
}
/**
* @param Node $node
* A node to parse
*
* @return Context
* A new or an unchanged context resulting from
* parsing the node
*/
public function visitCall(Node $node) : Context
{
$expression = $node->children['expr'];
if (Config::get()->backward_compatibility_checks) {
AST::backwardCompatibilityCheck($this->context, $node);
foreach ($node->children['args']->children as $arg_node) {
if ($arg_node instanceof Node) {
AST::backwardCompatibilityCheck($this->context, $arg_node);
}
}
}
if ($expression->kind == \ast\AST_NAME) {
try {
$method = AST::functionFromNameInContext($expression->children['name'], $this->context, $this->code_base);
} catch (CodeBaseException $exception) {
Log::err(Log::EUNDEF, $exception->getMessage(), $this->context->getFile(), $node->lineno);
return $this->context;
}
// Check the call for paraemter and argument types
$this->analyzeCallToMethod($this->code_base, $method, $node);
} else {
if ($expression->kind == \ast\AST_VAR) {
$variable_name = AST::variableName($expression);
if (empty($variable_name)) {
return $this->context;
}
// $var() - hopefully a closure, otherwise we don't know
if ($this->context->getScope()->hasVariableWithName($variable_name)) {
$variable = $this->context->getScope()->getVariableWithName($variable_name);
$union_type = $variable->getUnionType();
if ($union_type->isEmpty()) {
return $this->context;
}
$type = $union_type->head();
if (!$type instanceof CallableType) {
return $this->context;
}
$closure_fqsen = FullyQualifiedFunctionName::fromFullyQualifiedString((string) $type->asFQSEN());
if ($this->code_base->hasMethod($closure_fqsen)) {
// Get the closure
$method = $this->code_base->getMethod($closure_fqsen);
// Check the call for paraemter and argument types
$this->analyzeCallToMethod($this->code_base, $method, $node);
}
}
}
}
return $this->context;
}
/**
* Check to see if the given Clazz is a duplicate
*
* @return null
*/
public static function analyzeDuplicateFunction(CodeBase $code_base, FunctionInterface $method)
{
$fqsen = $method->getFQSEN();
if (!$fqsen->isAlternate()) {
return;
}
$original_fqsen = $fqsen->getCanonicalFQSEN();
if (!$code_base->hasMethod($original_fqsen)) {
return;
}
$original_method = $code_base->getMethod($original_fqsen);
$method_name = $method->getName();
if ($original_method->isInternal()) {
Issue::emit(Issue::RedefineFunctionInternal, $method->getFileRef()->getFile(), $method->getFileRef()->getLineNumberStart(), $method_name, $method->getFileRef()->getFile(), $method->getFileRef()->getLineNumberStart());
} else {
Issue::emit(Issue::RedefineFunction, $method->getFileRef()->getFile(), $method->getFileRef()->getLineNumberStart(), $method_name, $method->getFileRef()->getFile(), $method->getFileRef()->getLineNumberStart(), $original_method->getFileRef()->getFile(), $original_method->getFileRef()->getLineNumberStart());
}
}
/**
* @param string $function_name
* The name of the function we'd like to look up
*
* @param bool $is_function_declaration
* This must be set to true if we're getting a function
* that is being declared and false if we're getting a
* function being called.
*
* @return Method
* A method with the given name in the given context
*
* @throws CodeBaseExtension
* An exception is thrown if we can't find the given
* function
*/
public function getFunction(string $function_name, bool $is_function_declaration = false) : Method
{
if ($is_function_declaration) {
$function_fqsen = FullyQualifiedFunctionName::make($this->context->getNamespace(), $function_name);
} else {
$function_fqsen = FullyQualifiedFunctionName::make($this->context->getNamespace(), $function_name);
// If it doesn't exist in the local namespace, try it
// in the global namespace
if (!$this->code_base->hasMethod($function_fqsen)) {
$function_fqsen = FullyQualifiedFunctionName::fromStringInContext($function_name, $this->context);
}
}
// Make sure the method we're calling actually exists
if (!$this->code_base->hasMethod($function_fqsen)) {
throw new CodeBaseException($function_fqsen, "call to undefined function {$function_fqsen}()");
}
$method = $this->code_base->getMethod($function_fqsen);
return $method;
}
/**
* Check to see if the given Clazz is a duplicate
*
* @return null
*/
public static function analyzeDuplicateFunction(CodeBase $code_base, Method $method)
{
$fqsen = $method->getFQSEN();
if (!$fqsen->isAlternate()) {
return;
}
$original_fqsen = $fqsen->getCanonicalFQSEN();
if (!$code_base->hasMethod($original_fqsen)) {
return;
}
$original_method = $code_base->getMethod($original_fqsen);
$method_name = $method->getName();
if ('internal' === $original_method->getContext()->getFile()) {
// If its in an conditional and the original is an
// internal method, presume its all OK.
if ($method->getContext()->getIsConditional()) {
return;
}
Log::err(Log::EREDEF, "Function {$method_name} defined at {$method->getContext()->getFile()}:{$method->getContext()->getLineNumberStart()} was previously defined internally", $method->getContext()->getFile(), $method->getContext()->getLineNumberStart());
} else {
Log::err(Log::EREDEF, "Function {$method_name} defined at {$method->getContext()->getFile()}:{$method->getContext()->getLineNumberStart()} was previously defined at {$original_method->getContext()->getFile()}:{$original_method->getContext()->getLineNumberStart()}", $method->getContext()->getFile(), $method->getContext()->getLineNumberStart());
}
}
/**
* @return Method
* Get the closure in this scope or fail real hard
*/
public function getClosureInScope(CodeBase $code_base) : Method
{
assert($this->isClosureScope(), "Must be in closure scope to get closure. Actually in {$this}");
return $code_base->getMethod($this->getClosureFQSEN());
}
/**
* @return Method[]
* The set of all alternates to this method
*/
public function alternateGenerator(CodeBase $code_base) : \Generator
{
$alternate_id = 0;
$fqsen = $this->getFQSEN();
while ($code_base->hasMethod($fqsen)) {
(yield $code_base->getMethod($fqsen));
$fqsen = $fqsen->withAlternateId(++$alternate_id);
}
}
/**
* @param string $function_name
* The name of the function we'd like to look up
*
* @param Context $context
* The context in which we found the reference to the
* given function name
*
* @param CodeBase $code_base
* The global code base holding all state
*
* @param bool $is_function_declaration
* This must be set to true if we're getting a function
* that is being declared and false if we're getting a
* function being called.
*
* @return Method
* A method with the given name in the given context
*
* @throws CodeBaseExtension
* An exception is thrown if we can't find the given
* function
*/
public static function functionFromNameInContext(string $function_name, Context $context, CodeBase $code_base, bool $is_function_declaration = false) : Method
{
if ($is_function_declaration) {
$function_fqsen = FullyQualifiedFunctionName::make($context->getNamespace(), $function_name);
} else {
$function_fqsen = FullyQualifiedFunctionName::fromStringInContext($function_name, $context);
}
// Make sure the method we're calling actually exists
if (!$code_base->hasMethod($function_fqsen)) {
throw new CodeBaseException("call to undefined function {$function_fqsen}()");
}
$method = $code_base->getMethod($function_fqsen);
return $method;
}
