Module Cast

Provides classes for modeling C/C++ casts and conversions, as well as some type-related operators such as sizeof and alignof.

Import path

import semmle.code.cpp.exprs.Cast

Imports

Expr	Provides classes modeling C/C++ expressions.

Predicates

qlCast	A node representing the Cast sub-class of entity `cast`.
qlConversion	A node representing the Conversion sub-class of entity `cast`.

Classes

AlignofExprOperator	A C++11 `alignof` expression whose operand is an expression. `int addrMask = ~(alignof(expr) - 1);`
AlignofOperator	A C++11 `alignof` expression.
AlignofTypeOperator	A C++11 `alignof` expression whose operand is a type name. `bool proper_alignment = (alignof(T) == alignof(T[0]);`
ArithmeticConversion	A conversion from one arithmetic or `enum` type to another.
ArrayToPointerConversion	A C/C++ array to pointer conversion.
BaseClassConversion	A conversion from a pointer or glvalue of a derived class to a pointer or glvalue of a direct or virtual base class.
BoolConversion	A conversion to `bool`. Returns `false` if the source value is zero, `false`, or `nullptr`. Returns `true` otherwise.
CStyleCast	A cast expression in C, or a C-style cast expression in C++. `float f = 3.0f; int i = (int)f;`
Cast	A C/C++ cast expression.
ConstCast	A C++ `const_cast` expression.
Conversion	A C/C++ cast expression or similar unary expression that doesn’t affect the logical value of its operand.
DatasizeofExprOperator	A C++ `__datasizeof` expression whose operand is an expression.
DatasizeofOperator	A C++ `__datasizeof` expression (used by some implementations of the `<type_traits>` header).
DatasizeofTypeOperator	A C++ `__datasizeof` expression whose operand is a type name.
DerivedClassConversion	A conversion from a pointer or glvalue to a base class to a pointer or glvalue to a direct derived class.
DynamicCast	A C++ `dynamic_cast` expression.
FloatingPointConversion	A conversion from one floating point type.
FloatingPointToIntegralConversion	A conversion from a floating point type to an integral or enum type.
GlvalueConversion	A conversion of a glvalue from one type to another. The conversion does not modify the address of the glvalue. For glvalue conversions involving base and derived classes, see `BaseClassConversion` and `DerivedClassConversion`.
InheritanceConversion	A conversion between two pointers or _glvalue_s related by inheritance.
IntegralConversion	A conversion from one integral or enum type to another.
IntegralToFloatingPointConversion	A conversion from an integral or enum type to a floating point type.
IntegralToPointerConversion	A conversion from an integral or enum type to a pointer type.
PointerConversion	A conversion from one pointer type to another.
PointerToIntegralConversion	A conversion from a pointer type to an integral or enum type.
PointerToMemberBaseClassConversion	A conversion from a pointer-to-member of a derived class to a pointer-to-member of an immediate base class.
PointerToMemberConversion	A conversion from one pointer-to-member type to another.
PointerToMemberDerivedClassConversion	A conversion from a pointer-to-member of a base class to a pointer-to-member of an immediate derived class.
PrvalueAdjustmentConversion	The adjustment of the type of a class prvalue. Most commonly seen in code similar to: `class String { ... }; String func(); void caller() { const String& r = func(); }` In the above example, the result of the call to `func` is a prvalue of type `String`, which will be adjusted to type `const String` before being bound to the reference.
ReinterpretCast	A C++ `reinterpret_cast` expression.
SizeofExprOperator	A C/C++ sizeof expression whose operand is an expression. `if (sizeof(a) == sizeof(b)) { c = (b)a; }`
SizeofOperator	A C/C++ sizeof expression.
SizeofPackExprOperator	A C++11 `sizeof...` expression which determines the size of a template parameter pack and whose operand is an expression.
SizeofPackOperator	A C++11 `sizeof...` expression which determines the size of a template parameter pack.
SizeofPackTypeOperator	A C++11 `sizeof...` expression which determines the size of a template parameter pack and whose operand is an type name or a template template parameter.
SizeofTypeOperator	A C/C++ sizeof expression whose operand is a type name. `int szlong = sizeof(int) == sizeof(long)? 4 : 8;`
StaticCast	A C++ `static_cast` expression.
TemporaryObjectExpr	A node representing a temporary object created as part of an expression.
TypeidOperator	A C++ `typeid` expression which provides run-time type information (RTTI) about its argument.
UuidofOperator	A Microsoft C/C++ `__uuidof` expression that returns the UUID of a type, as specified by the `__declspec(uuid)` attribute. `struct UUID { char a[16]; }; struct __declspec(uuid("{01234567-89ab-cdef-0123-456789ABCDEF}")) S {}; UUID uuid = __uuidof(S);`
VoidConversion	A conversion to `void`.

Modules

CastConsistency

INTERNAL: Do not use. Query predicates used to check invariants that should hold for all Cast nodes. To run all consistency queries for the ASTs, including the ones below, run “semmle/code/cpp/ASTConsistency.ql”.