/**
* @param Node $node
* A node to parse
*
* @return Context
* A new or an unchanged context resulting from
* parsing the node
*/
public function visitVar(Node $node) : Context
{
$variable_name = (new ContextNode($this->code_base, $this->context, $node))->getVariableName();
// Check to see if the variable already exists
if ($this->context->getScope()->hasVariableWithName($variable_name)) {
$variable = $this->context->getScope()->getVariableWithName($variable_name);
// If we're assigning to an array element then we don't
// know what the constitutation of the parameter is
// outside of the scope of this assignment, so we add to
// its union type rather than replace it.
if ($this->is_dim_assignment) {
$variable->getUnionType()->addUnionType($this->right_type);
} else {
// If the variable isn't a pass-by-reference paramter
// we clone it so as to not disturb its previous types
// as we replace it.
if ($variable instanceof Parameter) {
if ($variable->isPassByReference()) {
} else {
$variable = clone $variable;
}
} else {
$variable = clone $variable;
}
if ($this->context->getIsConditional()) {
// If we're within a conditional, we shouldn't
// replace the type since the other side of
// the branch may have another type
$variable->getUnionType()->addUnionType($this->right_type);
} else {
$variable->setUnionType($this->right_type);
}
}
$this->context->addScopeVariable($variable);
return $this->context;
}
$variable = Variable::fromNodeInContext($this->assignment_node, $this->context, $this->code_base);
// Set that type on the variable
$variable->getUnionType()->addUnionType($this->right_type);
// Note that we're not creating a new scope, just
// adding variables to the existing scope
$this->context->addScopeVariable($variable);
return $this->context;
}