/**
* Take a look at all globally accessible elements and see if
* we can find any dead code that is never referenced
*
* @return void
*/
public static function analyzeReferenceCounts(CodeBase $code_base)
{
// Check to see if dead code detection is enabled. Keep
// in mind that the results here are just a guess and
// we can't tell with certainty that anything is
// definitely unreferenced.
if (!Config::get()->dead_code_detection) {
return;
}
// Get the count of all known elements
$total_count = count($code_base->getMethodMap(), COUNT_RECURSIVE) + count($code_base->getPropertyMap(), COUNT_RECURSIVE) + count($code_base->getConstantMap(), COUNT_RECURSIVE) + count($code_base->getClassMap(), COUNT_RECURSIVE);
$i = 0;
$analyze_list = function ($list) use($code_base, &$i, $total_count) {
foreach ($list as $name => $element) {
CLI::progress('dead code', ++$i / $total_count);
self::analyzeElementReferenceCounts($code_base, $element);
}
};
$analyze_map = function ($map) use($code_base, &$i, $total_count) {
foreach ($map as $fqsen_string => $list) {
foreach ($list as $name => $element) {
CLI::progress('dead code', ++$i / $total_count);
// Don't worry about internal elements
if ($element->getContext()->isInternal()) {
continue;
}
$element_fqsen = $element->getFQSEN();
if ($element_fqsen instanceof FullyQualifiedClassElement) {
$class_fqsen = $element->getDefiningClassFQSEN();
// Don't analyze elements defined in a parent
// class
if ((string) $class_fqsen !== $fqsen_string) {
continue;
}
$defining_class = $element->getDefiningClass($code_base);
// Don't analyze elements on interfaces or on
// abstract classes, as they're uncallable.
if ($defining_class->isInterface() || $defining_class->isAbstract() || $defining_class->isTrait()) {
continue;
}
// Ignore magic methods
if ($element instanceof Method && $element->getIsMagic()) {
continue;
}
}
self::analyzeElementReferenceCounts($code_base, $element);
}
}
};
$analyze_map($code_base->getMethodMap());
$analyze_map($code_base->getPropertyMap());
$analyze_map($code_base->getConstantMap());
$analyze_list($code_base->getClassMap());
}
/**
* Take a pass over all functions verifying various
* states.
*
* @return null
*/
public static function analyzeFunctions(CodeBase $code_base)
{
$function_count = count($code_base->getMethodMap(), COUNT_RECURSIVE);
$i = 0;
foreach ($code_base->getMethodMap() as $fqsen_string => $method_map) {
foreach ($method_map as $name => $method) {
CLI::progress('method', ++$i / $function_count);
if ($method->getContext()->isInternal()) {
continue;
}
DuplicateFunctionAnalyzer::analyzeDuplicateFunction($code_base, $method);
ParameterTypesAnalyzer::analyzeParameterTypes($code_base, $method);
}
}
}
/**
* Take a pass over all functions verifying various
* states.
*
* @return null
*/
private function analyzeFunctions(CodeBase $code_base)
{
$function_count = count($code_base->getMethodMap());
$i = 0;
foreach ($code_base->getMethodMap() as $fqsen_string => $method_map) {
foreach ($method_map as $name => $method) {
CLI::progress('method', ++$i / $function_count);
if ($method->getContext()->isInternal()) {
continue;
}
self::analyzeDuplicateFunction($code_base, $method);
self::analyzeParameterTypes($code_base, $method);
}
}
}
/**
* Take a look at all globally accessible elements and see if
* we can find any dead code that is never referenced
*
* @return void
*/
public static function analyzeReferenceCounts(CodeBase $code_base)
{
// Check to see if dead code detection is enabled. Keep
// in mind that the results here are just a guess and
// we can't tell with certainty that anything is
// definitely unreferenced.
if (!Config::get()->dead_code_detection) {
return;
}
// Get the count of all known elements
$total_count = count($code_base->getMethodMap(), COUNT_RECURSIVE) + count($code_base->getPropertyMap(), COUNT_RECURSIVE) + count($code_base->getConstantMap(), COUNT_RECURSIVE) + count($code_base->getClassMap(), COUNT_RECURSIVE);
$i = 0;
$analyze_list = function ($list, string $issue_type) use($code_base, &$i, $total_count) {
foreach ($list as $name => $element) {
CLI::progress('dead code', ++$i / $total_count);
self::analyzeElementReferenceCounts($code_base, $element, $issue_type);
}
};
$analyze_map = function ($map, string $issue_type) use($code_base, &$i, $total_count) {
foreach ($map as $fqsen_string => $list) {
foreach ($list as $name => $element) {
CLI::progress('dead code', ++$i / $total_count);
// Don't worry about internal elements
if ($element->isInternal()) {
continue;
}
$element_fqsen = $element->getFQSEN();
if (0 !== strpos((string) $element_fqsen, $fqsen_string)) {
continue;
}
// Skip methods that are overrides of other methods
if ($element_fqsen instanceof FullyQualifiedMethodName) {
if ($element->getIsOverride()) {
continue;
}
}
// Skip properties on classes that have a magic
// __get or __set method given that we can't track
// their access
if ($element instanceof Property) {
$defining_class = $element->getDefiningClass($code_base);
if ($defining_class->hasMethodWithName($code_base, '__set') || $defining_class->hasMethodWithName($code_base, '__get')) {
continue;
}
}
if ($element_fqsen instanceof FullyQualifiedClassElement) {
$class_fqsen = $element->getDefiningClassFQSEN();
// Don't analyze elements defined in a parent
// class
if ((string) $class_fqsen !== $fqsen_string) {
continue;
}
$defining_class = $element->getDefiningClass($code_base);
// Don't analyze elements on interfaces or on
// abstract classes, as they're uncallable.
if ($defining_class->isInterface() || $defining_class->isAbstract() || $defining_class->isTrait()) {
continue;
}
// Ignore magic methods
if ($element instanceof Method) {
// Doubly nested so that `$element` shows
// up as Method in Phan.
if ($element->getIsMagic()) {
continue;
}
}
}
self::analyzeElementReferenceCounts($code_base, $element, $issue_type);
}
}
};
$analyze_map($code_base->getMethodMap(), Issue::UnreferencedMethod);
$analyze_map($code_base->getPropertyMap(), Issue::UnreferencedProperty);
$analyze_map($code_base->getConstantMap(), Issue::UnreferencedConstant);
$analyze_list($code_base->getClassMap(), Issue::UnreferencedClass);
}