/**
* @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;
}
/**
* Visit a node with kind `\ast\AST_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 visitCall(Node $node) : UnionType
{
if ($node->children['expr']->kind !== \ast\AST_NAME) {
// Things like `$func()`
return new UnionType();
}
$function_name = $node->children['expr']->children['name'];
try {
$function = AST::functionFromNameInContext($function_name, $this->context, $this->code_base);
} catch (CodeBaseException $exception) {
// If the function wasn't declared, it'll be caught
// and reported elsewhere
return new UnionType();
}
$function_fqsen = $function->getFQSEN();
// TODO: I don't believe we need this any more
// If this is an internal function, see if we can get
// its types from the static dataset.
if ($function->getContext()->isInternal() && $function->getUnionType()->isEmpty()) {
$map = UnionType::internalFunctionSignatureMapForFQSEN($function->getFQSEN());
return $map[$function_name] ?? new UnionType();
}
return $function->getUnionType();
}
/**
* Visit a node with kind `\ast\AST_FUNC_DECL`
*
* @param Node $node
* A node to parse
*
* @return Context
* A new or an unchanged context resulting from
* parsing the node
*/
public function visitFuncDecl(Node $node) : Context
{
$function_name = $node->name;
try {
$method = AST::functionFromNameInContext($function_name, $this->context, $this->code_base, true);
} catch (CodeBaseException $exception) {
Log::err(Log::EFATAL, $exception->getMessage(), $this->context->getFile(), $node->lineno);
return $this->context;
}
// Hunt for the alternate associated with the file we're
// looking at currently in this context.
foreach ($method->alternateGenerator($this->code_base) as $i => $alternate_method) {
if ($alternate_method->getContext()->getFile() === $this->context->getFile()) {
return $method->getContext()->withMethodFQSEN($alternate_method->getFQSEN());
}
}
// No alternate was found
Log::err(Log::EFATAL, "Can't find function {$function_name} - aborting", $this->context->getFile(), $node->lineno);
return $this->context;
}
/**
* Visit a node with kind `\ast\AST_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 visitCall(Node $node) : UnionType
{
if ($node->children['expr']->kind !== \ast\AST_NAME) {
// Things like `$func()`
return new UnionType();
}
$function_name = $node->children['expr']->children['name'];
$function = AST::functionFromNameInContext($function_name, $this->context, $this->code_base);
$function_fqsen = $function->getFQSEN();
// If this is an internal function, see if we can get
// its types from the static dataset.
if ($function->getContext()->isInternal() && $function->getUnionType()->isEmpty()) {
$map = UnionType::internalFunctionSignatureMapForFQSEN($function->getFQSEN());
return $map[$function_name] ?? new UnionType();
}
return $function->getUnionType();
}
