|
public static fromNode ( |
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| $context | The context in which the node appears | |
| $code_base | ||
| $node | ast\Node\Decl | An AST node representing a method |
| $fqsen | ||
| return | A Method representing the AST node in the given context | |
/**
* Visit a node with kind `\ast\AST_METHOD`
*
* @param Node $node
* A node to parse
*
* @return Context
* A new or an unchanged context resulting from
* parsing the node
*/
public function visitMethod(Decl $node) : Context
{
// Bomb out if we're not in a class context
$class = $this->getContextClass();
$method_name = (string) $node->name;
$method_fqsen = FullyQualifiedMethodName::fromStringInContext($method_name, $this->context);
// Hunt for an available alternate ID if necessary
$alternate_id = 0;
while ($this->code_base->hasMethodWithFQSEN($method_fqsen)) {
$method_fqsen = $method_fqsen->withAlternateId(++$alternate_id);
}
$method = Method::fromNode(clone $this->context, $this->code_base, $node, $method_fqsen);
$class->addMethod($this->code_base, $method, new None());
if ('__construct' === $method_name) {
$class->setIsParentConstructorCalled(false);
if ($class->isGeneric()) {
// Get the set of template type identifiers defined on
// the class
$template_type_identifiers = array_keys($class->getTemplateTypeMap());
// Get the set of template type identifiers defined
// across all parameter types
$parameter_template_type_identifiers = [];
foreach ($method->getParameterList() as $parameter) {
foreach ($parameter->getUnionType()->getTypeSet() as $type) {
if ($type instanceof TemplateType) {
$parameter_template_type_identifiers[] = $type->getName();
}
}
}
$missing_template_type_identifiers = array_diff($template_type_identifiers, $parameter_template_type_identifiers);
if ($missing_template_type_identifiers) {
$this->emitIssue(Issue::GenericConstructorTypes, $node->lineno ?? 0, implode(',', $missing_template_type_identifiers), (string) $class->getFQSEN());
}
}
} elseif ('__invoke' === $method_name) {
$class->getUnionType()->addType(CallableType::instance());
} elseif ('__toString' === $method_name && !$this->context->getIsStrictTypes()) {
$class->getUnionType()->addType(StringType::instance());
}
// Create a new context with a new scope
return $this->context->withScope($method->getInternalScope());
}
/**
* Visit a node with kind `\ast\AST_METHOD`
*
* @param Node $node
* A node to parse
*
* @return Context
* A new or an unchanged context resulting from
* parsing the node
*/
public function visitMethod(Decl $node) : Context
{
// Bomb out if we're not in a class context
$clazz = $this->getContextClass();
$method_name = (string) $node->name;
$method_fqsen = FullyQualifiedMethodName::fromStringInContext($method_name, $this->context);
// Hunt for an available alternate ID if necessary
$alternate_id = 0;
while ($this->code_base->hasMethodWithFQSEN($method_fqsen)) {
$method_fqsen = $method_fqsen->withAlternateId(++$alternate_id);
}
// Create a new context with a new scope
$context = $this->context->withScope(new Scope());
$method = Method::fromNode($context, $this->code_base, $node);
// Override the FQSEN with the found alternate ID
$method->setFQSEN($method_fqsen);
$clazz->addMethod($this->code_base, $method);
if ('__construct' === $method_name) {
$clazz->setIsParentConstructorCalled(false);
} elseif ('__invoke' === $method_name) {
$clazz->getUnionType()->addType(CallableType::instance());
} elseif ('__toString' === $method_name && !$this->context->getIsStrictTypes()) {
$clazz->getUnionType()->addType(StringType::instance());
}
// Send the context into the method and reset the scope
$context = $this->context->withMethodFQSEN($method->getFQSEN());
return $context;
}
/**
* Visit a node with kind `\ast\AST_CLOSURE`
*
* @param Node $node
* A node to parse
*
* @return Context
* A new or an unchanged context resulting from
* parsing the node
*/
public function visitClosure(Decl $node) : Context
{
$closure_fqsen = FullyQualifiedFunctionName::fromClosureInContext($this->context->withLineNumberStart($node->lineno ?? 0));
// If we have a 'this' variable in our current scope,
// pass it down into the closure
$context = $this->context->withScope(new Scope());
if ($this->context->getScope()->hasVariableWithName('this')) {
$context->addScopeVariable($this->context->getScope()->getVariableWithName('this'));
}
$method = Method::fromNode($context, $this->code_base, $node);
// Override the FQSEN with the found alternate ID
$method->setFQSEN($closure_fqsen);
// Make the closure reachable by FQSEN from anywhere
$this->code_base->addMethod($method);
if (!empty($node->children['uses']) && $node->children['uses']->kind == \ast\AST_CLOSURE_USES) {
$uses = $node->children['uses'];
foreach ($uses->children as $use) {
if ($use->kind != \ast\AST_CLOSURE_VAR) {
Issue::emit(Issue::VariableUseClause, $this->context->getFile(), $node->lineno ?? 0);
continue;
}
$variable_name = (new ContextNode($this->code_base, $this->context, $use->children['name']))->getVariableName();
if (empty($variable_name)) {
continue;
}
$variable = null;
// Check to see if the variable exists in this scope
if (!$this->context->getScope()->hasVariableWithName($variable_name)) {
// If this is not pass-by-reference variable we
// have a problem
if (!($use->flags & \ast\flags\PARAM_REF)) {
Issue::emit(Issue::UndeclaredVariable, $this->context->getFile(), $node->lineno ?? 0, $variable_name);
continue;
} else {
// If the variable doesn't exist, but its
// a pass-by-reference variable, we can
// just create it
$variable = Variable::fromNodeInContext($use, $this->context, $this->code_base, false);
}
} else {
$variable = $this->context->getScope()->getVariableWithName($variable_name);
// If this isn't a pass-by-reference variable, we
// clone the variable so state within this scope
// doesn't update the outer scope
if (!($use->flags & \ast\flags\PARAM_REF)) {
$variable = clone $variable;
}
}
// Pass the variable into a new scope
$context = $context->withScopeVariable($variable);
}
}
// Add all parameters to the scope
if (!empty($node->children['params']) && $node->children['params']->kind == \ast\AST_PARAM_LIST) {
$params = $node->children['params'];
foreach ($params->children as $param) {
// Read the parameter
$parameter = Parameter::fromNode($this->context, $this->code_base, $param);
// Add it to the scope
$context = $context->withScopeVariable($parameter);
}
}
return $context->withClosureFQSEN($closure_fqsen);
}
