Ejemplo n.º 1
0
 /**
  * @param Node $node
  * A node to check types on
  *
  * @return UnionType
  * The resulting type(s) of the binary operation
  */
 public function visitBinaryAdd(Node $node) : UnionType
 {
     $left = UnionType::fromNode($this->context, $this->code_base, $node->children['left']);
     $right = UnionType::fromNode($this->context, $this->code_base, $node->children['right']);
     // fast-track common cases
     if ($left->isType(IntType::instance()) && $right->isType(IntType::instance())) {
         return IntType::instance()->asUnionType();
     }
     // If both left and right are arrays, then this is array
     // concatenation.
     if ($left->isGenericArray() && $right->isGenericArray()) {
         if ($left->isEqualTo($right)) {
             return $left;
         }
         return ArrayType::instance()->asUnionType();
     }
     if (($left->isType(IntType::instance()) || $left->isType(FloatType::instance())) && ($right->isType(IntType::instance()) || $right->isType(FloatType::instance()))) {
         return FloatType::instance()->asUnionType();
     }
     $left_is_array = !empty($left->genericArrayElementTypes()) && empty($left->nonGenericArrayTypes()) || $left->isType(ArrayType::instance());
     $right_is_array = !empty($right->genericArrayElementTypes()) && empty($right->nonGenericArrayTypes()) || $right->isType(ArrayType::instance());
     if ($left_is_array && !$right->canCastToUnionType(ArrayType::instance()->asUnionType())) {
         Issue::maybeEmit($this->code_base, $this->context, Issue::TypeInvalidRightOperand, $node->lineno ?? 0);
         return new UnionType();
     } elseif ($right_is_array && !$left->canCastToUnionType(ArrayType::instance()->asUnionType())) {
         Issue::maybeEmit($this->code_base, $this->context, Issue::TypeInvalidLeftOperand, $node->lineno ?? 0);
         return new UnionType();
     } elseif ($left_is_array || $right_is_array) {
         // If it is a '+' and we know one side is an array
         // and the other is unknown, assume array
         return ArrayType::instance()->asUnionType();
     }
     return new UnionType([IntType::instance(), FloatType::instance()]);
 }
Ejemplo n.º 2
0
 /**
  * @param UnionType $target
  * A type to check to see if this can cast to it
  *
  * @return bool
  * True if this type is allowed to cast to the given type
  * i.e. int->float is allowed  while float->int is not.
  *
  * @see \Phan\Deprecated\Pass2::type_check
  * Formerly 'function type_check'
  */
 public function canCastToUnionType(UnionType $target) : bool
 {
     // Fast-track most common cases first
     // If either type is unknown, we can't call it
     // a success
     if ($this->isEmpty() || $target->isEmpty()) {
         return true;
     }
     // T === T
     if ($this->isEqualTo($target)) {
         return true;
     }
     if (Config::get()->null_casts_as_any_type) {
         // null <-> null
         if ($this->isType(NullType::instance()) || $target->isType(NullType::instance())) {
             return true;
         }
     }
     // mixed <-> mixed
     if ($target->hasType(MixedType::instance()) || $this->hasType(MixedType::instance())) {
         return true;
     }
     // int -> float
     if ($this->isType(IntType::instance()) && $target->isType(FloatType::instance())) {
         return true;
     }
     // Check conversion on the cross product of all
     // type combinations and see if any can cast to
     // any.
     foreach ($this->getTypeList() as $source_type) {
         if (empty($source_type)) {
             continue;
         }
         foreach ($target->getTypeList() as $target_type) {
             if (empty($target_type)) {
                 continue;
             }
             if ($source_type->canCastToType($target_type)) {
                 return true;
             }
         }
     }
     // Only if no source types can be cast to any target
     // types do we say that we cannot perform the cast
     return false;
 }
Ejemplo n.º 3
0
 /**
  * @param Node $node
  * A node to check types on
  *
  * @return UnionType
  * The resulting type(s) of the binary operation
  */
 public function visitBinaryAdd(Node $node) : UnionType
 {
     $left = UnionType::fromNode($this->context, $this->code_base, $node->children['left']);
     $right = UnionType::fromNode($this->context, $this->code_base, $node->children['right']);
     // fast-track common cases
     if ($left->isType(IntType::instance()) && $right->isType(IntType::instance())) {
         return IntType::instance()->asUnionType();
     }
     if (($left->isType(IntType::instance()) || $left->isType(FloatType::instance())) && ($right->isType(IntType::instance()) || $right->isType(FloatType::instance()))) {
         return FloatType::instance()->asUnionType();
     }
     $left_is_array = !empty($left->genericArrayElementTypes()) && empty($left->nonGenericArrayTypes());
     $right_is_array = !empty($right->genericArrayElementTypes()) && empty($right->nonGenericArrayTypes());
     if ($left_is_array && !$right->canCastToUnionType(ArrayType::instance()->asUnionType())) {
         Log::err(Log::ETYPE, "invalid operator: left operand is array and right is not", $this->context->getFile(), $node->lineno);
         return new UnionType();
     } else {
         if ($right_is_array && !$left->canCastToUnionType(ArrayType::instance()->asUnionType())) {
             Log::err(Log::ETYPE, "invalid operator: right operand is array and left is not", $this->context->getFile(), $node->lineno);
             return new UnionType();
         } else {
             if ($left_is_array || $right_is_array) {
                 // If it is a '+' and we know one side is an array
                 // and the other is unknown, assume array
                 return ArrayType::instance()->asUnionType();
             }
         }
     }
     return new UnionType([IntType::instance(), FloatType::instance()]);
 }
Ejemplo n.º 4
0
 /**
  * Visit a node with kind `\ast\AST_CAST`
  *
  * @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 visitCast(Node $node) : UnionType
 {
     switch ($node->flags) {
         case \ast\flags\TYPE_NULL:
             return NullType::instance()->asUnionType();
         case \ast\flags\TYPE_BOOL:
             return BoolType::instance()->asUnionType();
         case \ast\flags\TYPE_LONG:
             return IntType::instance()->asUnionType();
         case \ast\flags\TYPE_DOUBLE:
             return FloatType::instance()->asUnionType();
         case \ast\flags\TYPE_STRING:
             return StringType::instance()->asUnionType();
         case \ast\flags\TYPE_ARRAY:
             return ArrayType::instance()->asUnionType();
         case \ast\flags\TYPE_OBJECT:
             return ObjectType::instance()->asUnionType();
         default:
             Log::err(Log::EFATAL, "Unknown type (" . $node->flags . ") in cast");
     }
 }