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/**
* Provides a hierarchy of classes for modeling C/C++ types.
*/
import semmle.code.cpp.Element
import semmle.code.cpp.Function
import semmle.code.cpp.TemplateParameter
private import semmle.code.cpp.internal.ResolveClass
/**
* A C/C++ type.
*
* This QL class represents the root of the C/C++ type hierarchy.
*/
class Type extends Locatable, @type {
Type() { isType(underlyingElement(this)) }
/**
* Gets the name of this type.
*/
string getName() { none() }
/**
* Holds if this type is called `name`.
*/
predicate hasName(string name) { name = this.getName() }
/**
* Holds if this declaration has a specifier called `name`, recursively looking
* through `typedef` and `decltype`. For example, in the context of
* `typedef const int *restrict t`, the type `volatile t` has specifiers
* `volatile` and `restrict` but not `const` since the `const` is attached to
* the type being pointed to rather than the pointer itself.
*/
// This predicate should not be overridden, but it cannot be declared `final`
// because there is a similarly-named predicate in Declaration, and UserType
// inherits from both Type and Declaration and must override it to resolve
// the ambiguity.
predicate hasSpecifier(string name) { this.getASpecifier().hasName(name) }
/**
* Gets a specifier of this type, recursively looking through `typedef` and
* `decltype`. For example, in the context of `typedef const int *restrict t`,
* the type `volatile t` has specifiers `volatile` and `restrict` but not
* `const` since the `const` is attached to the type being pointed to rather
* than the pointer itself.
*/
// This predicate should not be overridden, but it cannot be declared `final`
// because there is a similarly-named predicate in Declaration, and UserType
// inherits from both Type and Declaration and must override it to resolve
// the ambiguity.
Specifier getASpecifier() {
typespecifiers(underlyingElement(this), unresolveElement(result))
or
result = this.internal_getAnAdditionalSpecifier()
}
/**
* Gets an attribute of this type.
*/
Attribute getAnAttribute() { typeattributes(underlyingElement(this), unresolveElement(result)) }
/**
* Internal -- should be `protected` when QL supports such a flag. Subtypes
* override this to recursively get specifiers that are not attached directly
* to this `@type` in the database but arise through type aliases such as
* `typedef` and `decltype`.
*/
Specifier internal_getAnAdditionalSpecifier() { none() }
/**
* Holds if this type is const.
*/
predicate isConst() { this.hasSpecifier("const") }
/**
* Holds if this type is volatile.
*/
predicate isVolatile() { this.hasSpecifier("volatile") }
/**
* Holds if this type refers to type `t` (by default,
* a type always refers to itself).
*/
predicate refersTo(Type t) { this.refersToDirectly*(t) }
/**
* Holds if this type refers to type `t` directly.
*/
predicate refersToDirectly(Type t) { none() }
/**
* Gets this type after typedefs have been resolved.
*
* The result of this predicate will be the type itself, except in the case of a TypedefType, a Decltype,
* or a TypeofType, in which case the result will be type which results from (possibly recursively)
* resolving typedefs.
*/
pragma[nomagic]
Type getUnderlyingType() { result = this }
/**
* Gets this type after specifiers have been deeply stripped and typedefs have been resolved.
*
* For example, starting with `const i64* const` in the context of `typedef long long i64;`, this predicate will return `long long*`.
*/
pragma[nomagic]
Type getUnspecifiedType() { unspecifiedtype(underlyingElement(this), unresolveElement(result)) }
/**
* Gets this type after any top-level specifiers and typedefs have been stripped.
*
* For example, starting with `const i64* const`, this predicate will return `const i64*`.
*/
Type stripTopLevelSpecifiers() { result = this }
/**
* Gets the size of this type in bytes.
*/
int getSize() {
builtintypes(underlyingElement(this), _, _, result, _, _) or
pointerishsize(underlyingElement(this), result, _) or
usertypesize(underlyingElement(this), result, _)
}
/**
* Gets the alignment of this type in bytes.
*/
int getAlignment() {
builtintypes(underlyingElement(this), _, _, _, _, result) or
pointerishsize(underlyingElement(this), _, result) or
usertypesize(underlyingElement(this), _, result)
}
/**
* Gets the pointer indirection level of this type.
*/
int getPointerIndirectionLevel() { result = 0 }
/**
* Gets a detailed string representation explaining the AST of this type
* (with all specifiers and nested constructs such as pointers). This is
* intended to help debug queries and is a very expensive operation; not
* to be used in production queries.
*
* An example output is "const {pointer to {const {char}}}".
*/
string explain() { result = "type" } // Concrete base impl to allow filters on Type
/**
* Holds if this type is constant and only contains constant types.
* For instance, a `char *const` is a constant type, but not deeply constant,
* because while the pointer can't be modified the character can. The type
* `const char *const*` is a deeply constant type though - both the pointer
* and what it points to are immutable.
*/
predicate isDeeplyConst() { this.isConst() and this.isDeeplyConstBelow() }
/**
* Holds if this type is constant and only contains constant types, excluding
* the type itself. It is implied by Type.isDeeplyConst() and is just used to
* implement that predicate.
* For example, `const char *const` is deeply constant and deeply constant below,
* but `const char *` is only deeply constant below (the pointer can be changed,
* but not the underlying char). `char *const` is neither (it is just `const`).
*/
predicate isDeeplyConstBelow() { none() } // Concrete base impl to allow filters on Type
/**
* Gets as many places as possible where this type is used by name in the source after macros have been replaced
* (in particular, therefore, this will find type name uses caused by macros). Note that all type name uses within
* instantiations are currently excluded - this is too draconian in the absence of indexing prototype instantiations
* of functions, and is likely to improve in the future. At present, the method takes the conservative approach of
* giving valid type name uses, but not necessarily *all* type name uses.
*/
Element getATypeNameUse() {
// An explicit cast to a type referring to T uses T. We exclude casts within instantiations,
// since they do not appear directly in the source.
exists(Cast c |
not c.isImplicit() and
c.getType().refersTo(this) and
result = c and
not c.getEnclosingFunction().isConstructedFrom(_)
)
or
// A class derivation from a type referring to T uses T. We exclude class derivations within
// instantiations, since they do not appear directly in the source.
exists(ClassDerivation cd |
cd.getBaseType().refersTo(this) and
result = cd and
not cd.getDerivedClass() instanceof ClassTemplateInstantiation
)
or
// A new, new array, or placement new expression with a type that refers to T uses T.
// We exclude news within instantiations, since they do not appear directly in the source.
exists(Expr e |
(
e instanceof NewArrayExpr or
e instanceof NewExpr
) and
e.getType().refersTo(this) and
result = e and
not e.getEnclosingFunction().isConstructedFrom(_)
)
or
// The declaration of a function that returns a type referring to T uses T. We exclude
// declarations of function template instantiations, since their return types do not
// appear directly in the source. We also exclude constructors and destructors, since
// they are indexed with a dummy return type of void that does not appear in the source.
exists(FunctionDeclarationEntry fde, Type t |
(if exists(fde.getTypedefType()) then t = fde.getTypedefType() else t = fde.getType()) and
t.refersTo(this) and
result = fde and
not fde.getDeclaration().isConstructedFrom(_) and
not fde.getDeclaration() instanceof Constructor and
not fde.getDeclaration() instanceof Destructor
)
or
// A function call that provides an explicit template argument that refers to T uses T.
// We exclude calls within instantiations, since they do not appear directly in the source.
exists(FunctionCall c |
c.getAnExplicitTemplateArgument().(Type).refersTo(this) and
result = c and
not c.getEnclosingFunction().isConstructedFrom(_)
)
or
// Qualifying an expression with a type that refers to T uses T. We exclude qualifiers
// within instantiations, since they do not appear directly in the source.
exists(NameQualifier nq |
nq.getQualifyingElement().(Type).refersTo(this) and
result = nq and
not nq.getExpr().getEnclosingFunction().isConstructedFrom(_)
)
or
// Calculating the size of a type that refers to T uses T. We exclude sizeofs within
// instantiations, since they do not appear directly in the source.
exists(SizeofTypeOperator soto |
soto.getTypeOperand().refersTo(this) and
result = soto and
not soto.getEnclosingFunction().isConstructedFrom(_)
)
or
// A typedef of a type that refers to T uses T.
exists(TypeDeclarationEntry tde |
tde.getDeclaration().(TypedefType).getBaseType().refersTo(this) and
result = tde
)
or
// Using something declared within a type that refers to T uses T.
exists(UsingDeclarationEntry ude |
ude.getDeclaration().getDeclaringType().refersTo(this) and
result = ude
)
or
// The declaration of a variable with a type that refers to T uses T. We exclude declarations within
// instantiations, since those do not appear directly in the source.
exists(VariableDeclarationEntry vde |
vde.getType().refersTo(this) and
result = vde and
not exists(LocalScopeVariable sv |
sv = vde.getDeclaration() and sv.getFunction().isConstructedFrom(_)
) and
not exists(MemberVariable mv |
mv = vde.getDeclaration() and mv.getDeclaringType() instanceof ClassTemplateInstantiation
)
)
}
/**
* Holds if this type involves a reference.
*/
predicate involvesReference() { none() }
/**
* Holds if this type involves a template parameter.
*/
predicate involvesTemplateParameter() { none() }
/**
* Gets this type with any typedefs resolved. For example, given
* `typedef C T`, this would resolve `const T&` to `const C&`.
* Note that this will only work if the resolved type actually appears
* on its own elsewhere in the program.
*/
Type resolveTypedefs() { result = this }
/**
* Gets the type stripped of pointers, references and cv-qualifiers, and resolving typedefs.
* For example, given `typedef const C& T`, `stripType` returns `C`.
*/
Type stripType() { result = this }
override Location getLocation() { result instanceof UnknownLocation }
}
/**
* A C/C++ built-in primitive type (int, float, void, and so on). See 4.1.1.
* In the following example, `unsigned int` and `double` denote primitive
* built-in types:
* ```
* double a;
* unsigned int ua[40];
* typedef double LargeFloat;
* ```
*/
class BuiltInType extends Type, @builtintype {
override string toString() { result = this.getName() }
override string getName() { builtintypes(underlyingElement(this), result, _, _, _, _) }
override string explain() { result = this.getName() }
override predicate isDeeplyConstBelow() { any() } // No subparts
}
/**
* An erroneous type. This type has no corresponding C/C++ syntax.
*
* `ErroneousType` is the type of `ErrorExpr`, which in turn refers to an illegal
* language construct. In the example below, a temporary (`0`) cannot be bound
* to an lvalue reference (`int &`):
* ```
* int &intref = 0;
* ```
*/
class ErroneousType extends BuiltInType {
ErroneousType() { builtintypes(underlyingElement(this), _, 1, _, _, _) }
override string getAPrimaryQlClass() { result = "ErroneousType" }
}
/**
* The unknown type. This type has no corresponding C/C++ syntax.
*
* Unknown types usually occur inside _uninstantiated_ template functions.
* In the example below, the expressions `x.a` and `x.b` have unknown type
* in the _uninstantiated_ template.
* ```
* template<typename T>
* bool check(T x) {
* if (x.a == x.b)
* abort();
* }
* ```
*/
class UnknownType extends BuiltInType {
UnknownType() { builtintypes(underlyingElement(this), _, 2, _, _, _) }
override string getAPrimaryQlClass() { result = "UnknownType" }
}
private predicate isArithmeticType(@builtintype type, int kind) {
builtintypes(type, _, kind, _, _, _) and
kind >= 4 and
kind != 34 and // Exclude decltype(nullptr)
kind != 63 // Exclude __SVCount_t
}
/**
* The Arm scalable vector count type.
*
* In the following example, `a` is declared using the scalable vector
* count type:
* ```
* svcount_t a;
* ```
*/
class ScalableVectorCount extends BuiltInType {
ScalableVectorCount() { builtintypes(underlyingElement(this), _, 63, _, _, _) }
override string getAPrimaryQlClass() { result = "ScalableVectorCount" }
}
/**
* The C/C++ arithmetic types. See 4.1.1.
*
* This includes primitive types on which arithmetic, bitwise or logical
* operations may be performed. Examples of arithmetic types include
* `char`, `int`, `float`, and `bool`.
*/
class ArithmeticType extends BuiltInType {
ArithmeticType() { isArithmeticType(underlyingElement(this), _) }
override string getAPrimaryQlClass() { result = "ArithmeticType" }
}
private predicate isIntegralType(@builtintype type, int kind) {
isArithmeticType(type, kind) and
(
kind < 24
or
kind = 33
or
35 <= kind and kind <= 37
or
kind = 43
or
kind = 44
or
kind = 51
)
}
/**
* A C/C++ integral or `enum` type.
*
* The definition of "integral type" in the C++ standard excludes `enum` types,
* but because an `enum` type holds a value of its underlying integral type,
* it is often useful to have a common category that includes both integral
* and `enum` types.
*
* In the following example, `a`, `b` and `c` are all declared with an
* integral or `enum` type:
* ```
* unsigned long a;
* enum e1 { val1, val2 } b;
* enum class e2: short { val3, val4 } c;
* ```
*/
class IntegralOrEnumType extends Type {
IntegralOrEnumType() {
// Integral type
isIntegralType(underlyingElement(this), _)
or
// Enum type
usertypes(underlyingElement(this), _, [4, 13])
}
}
/**
* Maps between different integral types of the same size.
*
* original: The original type. Can be any integral type kind.
* canonical: The canonical form of the type
* - plain T -> T
* - signed T -> T (except signed char -> signed char)
* - unsigned T -> unsigned T
* unsigned: The explicitly unsigned form of the type.
* signed: The explicitly signed form of the type.
*/
private predicate integralTypeMapping(int original, int canonical, int unsigned, int signed) {
original = 4 and canonical = 4 and unsigned = -1 and signed = -1 // bool
or
original = 5 and canonical = 5 and unsigned = 6 and signed = 7 // char
or
original = 6 and canonical = 6 and unsigned = 6 and signed = 7 // unsigned char
or
original = 7 and canonical = 7 and unsigned = 6 and signed = 7 // signed char
or
original = 8 and canonical = 8 and unsigned = 9 and signed = 10 // short
or
original = 9 and canonical = 9 and unsigned = 9 and signed = 10 // unsigned short
or
original = 10 and canonical = 8 and unsigned = 9 and signed = 10 // signed short
or
original = 11 and canonical = 11 and unsigned = 12 and signed = 13 // int
or
original = 12 and canonical = 12 and unsigned = 12 and signed = 13 // unsigned int
or
original = 13 and canonical = 11 and unsigned = 12 and signed = 13 // signed int
or
original = 14 and canonical = 14 and unsigned = 15 and signed = 16 // long
or
original = 15 and canonical = 15 and unsigned = 15 and signed = 16 // unsigned long
or
original = 16 and canonical = 14 and unsigned = 15 and signed = 16 // signed long
or
original = 17 and canonical = 17 and unsigned = 18 and signed = 19 // long long
or
original = 18 and canonical = 18 and unsigned = 18 and signed = 19 // unsigned long long
or
original = 19 and canonical = 17 and unsigned = 18 and signed = 19 // signed long long
or
original = 33 and canonical = 33 and unsigned = -1 and signed = -1 // wchar_t
or
original = 35 and canonical = 35 and unsigned = 36 and signed = 37 // __int128
or
original = 36 and canonical = 36 and unsigned = 36 and signed = 37 // unsigned __int128
or
original = 37 and canonical = 35 and unsigned = 36 and signed = 37 // signed __int128
or
original = 43 and canonical = 43 and unsigned = -1 and signed = -1 // char16_t
or
original = 44 and canonical = 44 and unsigned = -1 and signed = -1 // char32_t
or
original = 51 and canonical = 51 and unsigned = -1 and signed = -1 // char8_t
}
/**
* The C/C++ integral types. See 4.1.1. These are types that are represented
* as integers of varying sizes. Both `enum` types and floating-point types
* are excluded.
*
* In the following examples, `a`, `b` and `c` are declared using integral
* types:
* ```
* unsigned int a;
* long long b;
* char c;
* ```
*/
class IntegralType extends ArithmeticType, IntegralOrEnumType {
int kind;
IntegralType() { isIntegralType(underlyingElement(this), kind) }
/** Holds if this integral type is signed. */
predicate isSigned() { builtintypes(underlyingElement(this), _, _, _, -1, _) }
/** Holds if this integral type is unsigned. */
predicate isUnsigned() { builtintypes(underlyingElement(this), _, _, _, 1, _) }
/** Holds if this integral type is explicitly signed. */
predicate isExplicitlySigned() {
builtintypes(underlyingElement(this), _, 7, _, _, _) or
builtintypes(underlyingElement(this), _, 10, _, _, _) or
builtintypes(underlyingElement(this), _, 13, _, _, _) or
builtintypes(underlyingElement(this), _, 16, _, _, _) or
builtintypes(underlyingElement(this), _, 19, _, _, _) or
builtintypes(underlyingElement(this), _, 37, _, _, _)
}
/** Holds if this integral type is explicitly unsigned. */
predicate isExplicitlyUnsigned() {
builtintypes(underlyingElement(this), _, 6, _, _, _) or
builtintypes(underlyingElement(this), _, 9, _, _, _) or
builtintypes(underlyingElement(this), _, 12, _, _, _) or
builtintypes(underlyingElement(this), _, 15, _, _, _) or
builtintypes(underlyingElement(this), _, 18, _, _, _) or
builtintypes(underlyingElement(this), _, 36, _, _, _)
}
/** Holds if this integral type is implicitly signed. */
predicate isImplicitlySigned() {
builtintypes(underlyingElement(this), _, 5, _, -1, _) or
builtintypes(underlyingElement(this), _, 8, _, -1, _) or
builtintypes(underlyingElement(this), _, 11, _, -1, _) or
builtintypes(underlyingElement(this), _, 14, _, -1, _) or
builtintypes(underlyingElement(this), _, 17, _, -1, _) or
builtintypes(underlyingElement(this), _, 35, _, -1, _)
}
/**
* Gets the unsigned type corresponding to this integral type. For
* example on a `short`, this would give the type `unsigned short`.
*/
IntegralType getUnsigned() {
exists(int unsignedKind |
integralTypeMapping(kind, _, unsignedKind, _) and
builtintypes(unresolveElement(result), _, unsignedKind, _, _, _)
)
}
/**
* Gets the canonical type corresponding to this integral type.
*
* For a plain type, this gives the same type (e.g. `short` -> `short`).
* For an explicitly unsigned type, this gives the same type (e.g. `unsigned short` -> `unsigned short`).
* For an explicitly signed type, this gives the plain version of that type (e.g. `signed short` -> `short`), except
* that `signed char` -> `signed char`.
*/
IntegralType getCanonicalArithmeticType() {
exists(int canonicalKind |
integralTypeMapping(kind, canonicalKind, _, _) and
builtintypes(unresolveElement(result), _, canonicalKind, _, _, _)
)
}
}
/**
* The C/C++ boolean type. See 4.2. This is the C `_Bool` type
* or the C++ `bool` type. For example:
* ```
* extern bool a, b; // C++
* _Bool c, d; // C
* ```
*/
class BoolType extends IntegralType {
BoolType() { builtintypes(underlyingElement(this), _, 4, _, _, _) }
override string getAPrimaryQlClass() { result = "BoolType" }
}
/**
* The C/C++ character types. See 4.3. This includes the `char`,
* `signed char` and `unsigned char` types, all of which are
* distinct from one another. For example:
* ```
* char a, b;
* signed char c, d;
* unsigned char e, f;
* ```
*/
class CharType extends IntegralType {
CharType() { builtintypes(underlyingElement(this), _, [5, 6, 7], _, _, _) }
}
/**
* The C/C++ `char` type (which is distinct from `signed char` and
* `unsigned char`). For example:
* ```
* char a, b;
* ```
*/
class PlainCharType extends CharType {
PlainCharType() { builtintypes(underlyingElement(this), _, 5, _, _, _) }
override string getAPrimaryQlClass() { result = "PlainCharType" }
}
/**
* The C/C++ `unsigned char` type (which is distinct from plain `char`
* even when `char` is `unsigned` by default).
* ```
* unsigned char e, f;
* ```
*/
class UnsignedCharType extends CharType {
UnsignedCharType() { builtintypes(underlyingElement(this), _, 6, _, _, _) }
override string getAPrimaryQlClass() { result = "UnsignedCharType" }
}
/**
* The C/C++ `signed char` type (which is distinct from plain `char`
* even when `char` is `signed` by default).
* ```
* signed char c, d;
* ```
*/
class SignedCharType extends CharType {
SignedCharType() { builtintypes(underlyingElement(this), _, 7, _, _, _) }
override string getAPrimaryQlClass() { result = "SignedCharType" }
}
/**
* The C/C++ short types. See 4.3. This includes `short`, `signed short`
* and `unsigned short`.
* ```
* signed short ss;
* ```
*/
class ShortType extends IntegralType {
ShortType() {
builtintypes(underlyingElement(this), _, 8, _, _, _) or
builtintypes(underlyingElement(this), _, 9, _, _, _) or
builtintypes(underlyingElement(this), _, 10, _, _, _)
}
override string getAPrimaryQlClass() { result = "ShortType" }
}
/**
* The C/C++ integer types. See 4.4. This includes `int`, `signed int`
* and `unsigned int`.
* ```
* unsigned int ui;
* ```
*/
class IntType extends IntegralType {
IntType() {
builtintypes(underlyingElement(this), _, 11, _, _, _) or
builtintypes(underlyingElement(this), _, 12, _, _, _) or
builtintypes(underlyingElement(this), _, 13, _, _, _)
}
override string getAPrimaryQlClass() { result = "IntType" }
}
/**
* The C/C++ long types. See 4.4. This includes `long`, `signed long`
* and `unsigned long`.
* ```
* long l;
* ```
*/
class LongType extends IntegralType {
LongType() {
builtintypes(underlyingElement(this), _, 14, _, _, _) or
builtintypes(underlyingElement(this), _, 15, _, _, _) or
builtintypes(underlyingElement(this), _, 16, _, _, _)
}
override string getAPrimaryQlClass() { result = "LongType" }
}
/**
* The C/C++ long long types. See 4.4. This includes `long long`, `signed long long`
* and `unsigned long long`.
* ```
* signed long long sll;
* ```
*/
class LongLongType extends IntegralType {
LongLongType() {
builtintypes(underlyingElement(this), _, 17, _, _, _) or
builtintypes(underlyingElement(this), _, 18, _, _, _) or
builtintypes(underlyingElement(this), _, 19, _, _, _)
}
override string getAPrimaryQlClass() { result = "LongLongType" }
}
/**
* The GNU C __int128 primitive types. They are not part of standard C/C++.
*
* This includes `__int128`, `signed __int128` and `unsigned __int128`.
* ```
* unsigned __int128 ui128;
* ```
*/
class Int128Type extends IntegralType {
Int128Type() {
builtintypes(underlyingElement(this), _, 35, _, _, _) or
builtintypes(underlyingElement(this), _, 36, _, _, _) or
builtintypes(underlyingElement(this), _, 37, _, _, _)
}
override string getAPrimaryQlClass() { result = "Int128Type" }
}
private newtype TTypeDomain =
TRealDomain() or
TComplexDomain() or
TImaginaryDomain()
/**
* The type domain of a floating-point type. One of `RealDomain`, `ComplexDomain`, or
* `ImaginaryDomain`.
*/
class TypeDomain extends TTypeDomain {
/** Gets a textual representation of this type domain. */
string toString() { none() }
}
/**
* The type domain of a floating-point type that represents a real number.
*/
class RealDomain extends TypeDomain, TRealDomain {
final override string toString() { result = "real" }
}
/**
* The type domain of a floating-point type that represents a complex number.
*/
class ComplexDomain extends TypeDomain, TComplexDomain {
final override string toString() { result = "complex" }
}
/**
* The type domain of a floating-point type that represents an imaginary number.
*/
class ImaginaryDomain extends TypeDomain, TImaginaryDomain {
final override string toString() { result = "imaginary" }
}
/**
* Data for floating-point types.
*
* kind: The original type kind. Can be any floating-point type kind.
* base: The numeric base of the number's representation. Can be 2 (binary) or 10 (decimal).
* domain: The type domain of the type. Can be `RealDomain`, `ComplexDomain`, or `ImaginaryDomain`.
* realKind: The type kind of the corresponding real type. For example, the corresponding real type
* of `_Complex double` is `double`.
* extended: `true` if the number is an extended-precision floating-point number, such as
* `_Float32x`.
*/
private predicate floatingPointTypeMapping(
int kind, int base, TTypeDomain domain, int realKind, boolean extended
) {
// float
kind = 24 and base = 2 and domain = TRealDomain() and realKind = 24 and extended = false
or
// double
kind = 25 and base = 2 and domain = TRealDomain() and realKind = 25 and extended = false
or
// long double
kind = 26 and base = 2 and domain = TRealDomain() and realKind = 26 and extended = false
or
// _Complex float
kind = 27 and base = 2 and domain = TComplexDomain() and realKind = 24 and extended = false
or
// _Complex double
kind = 28 and base = 2 and domain = TComplexDomain() and realKind = 25 and extended = false
or
// _Complex long double
kind = 29 and base = 2 and domain = TComplexDomain() and realKind = 26 and extended = false
or
// _Imaginary float
kind = 30 and base = 2 and domain = TImaginaryDomain() and realKind = 24 and extended = false
or
// _Imaginary double
kind = 31 and base = 2 and domain = TImaginaryDomain() and realKind = 25 and extended = false
or
// _Imaginary long double
kind = 32 and base = 2 and domain = TImaginaryDomain() and realKind = 26 and extended = false
or
// __float128
kind = 38 and base = 2 and domain = TRealDomain() and realKind = 38 and extended = false
or
// _Complex __float128
kind = 39 and base = 2 and domain = TComplexDomain() and realKind = 38 and extended = false
or
// _Float32
kind = 45 and base = 2 and domain = TRealDomain() and realKind = 45 and extended = false
or
// _Float32x
kind = 46 and base = 2 and domain = TRealDomain() and realKind = 46 and extended = true
or
// _Float64
kind = 47 and base = 2 and domain = TRealDomain() and realKind = 47 and extended = false
or
// _Float64x
kind = 48 and base = 2 and domain = TRealDomain() and realKind = 48 and extended = true
or
// _Float128
kind = 49 and base = 2 and domain = TRealDomain() and realKind = 49 and extended = false
or
// _Float16
kind = 52 and base = 2 and domain = TRealDomain() and realKind = 52 and extended = false
or
// _Complex _Float16
kind = 53 and base = 2 and domain = TComplexDomain() and realKind = 52 and extended = false
or
// __fp16
kind = 54 and base = 2 and domain = TRealDomain() and realKind = 54 and extended = false
or
// __bf16
kind = 55 and base = 2 and domain = TRealDomain() and realKind = 55 and extended = false
or
// std::float16_t
kind = 56 and base = 2 and domain = TRealDomain() and realKind = 56 and extended = false
or
// _Complex _Float32
kind = 57 and base = 2 and domain = TComplexDomain() and realKind = 45 and extended = false
or
// _Complex _Float32x
kind = 58 and base = 2 and domain = TComplexDomain() and realKind = 46 and extended = true
or
// _Complex _Float64
kind = 59 and base = 2 and domain = TComplexDomain() and realKind = 47 and extended = false
or
// _Complex _Float64x
kind = 60 and base = 2 and domain = TComplexDomain() and realKind = 48 and extended = true
or
// _Complex _Float128
kind = 61 and base = 2 and domain = TComplexDomain() and realKind = 49 and extended = false
or
// __mfp8
kind = 62 and base = 2 and domain = TRealDomain() and realKind = 62 and extended = false
or
// _Complex __fp16
kind = 64 and base = 2 and domain = TComplexDomain() and realKind = 54 and extended = false
or
// _Complex __bf16
kind = 65 and base = 2 and domain = TComplexDomain() and realKind = 55 and extended = false
or
// _Complex std::float16_t
kind = 66 and base = 2 and domain = TComplexDomain() and realKind = 56 and extended = false
}
/**
* The C/C++ floating point types. See 4.5. This includes `float`, `double` and `long double`, the
* fixed-size floating-point types like `_Float32`, and the extended-precision floating-point types
* like `_Float64x`. It also includes the complex and imaginary versions of all of these types.
*/
class FloatingPointType extends ArithmeticType {
final int base;
final TypeDomain domain;
final int realKind;
final boolean extended;
FloatingPointType() {
exists(int kind |
builtintypes(underlyingElement(this), _, kind, _, _, _) and
floatingPointTypeMapping(kind, base, domain, realKind, extended)
)
}
/** Gets the numeric base of this type's representation: 2 (binary) or 10 (decimal). */
final int getBase() { result = base }
/**
* Gets the type domain of this type. Can be `RealDomain`, `ComplexDomain`, or `ImaginaryDomain`.
*/
final TypeDomain getDomain() { result = domain }
/**
* Gets the corresponding real type of this type. For example, the corresponding real type of
* `_Complex double` is `double`.
*/
final RealNumberType getRealType() {
builtintypes(unresolveElement(result), _, realKind, _, _, _)
}
/** Holds if this type is an extended precision floating-point type, such as `_Float32x`. */
final predicate isExtendedPrecision() { extended = true }
}
/**
* A floating-point type representing a real number.
*/
class RealNumberType extends FloatingPointType {
RealNumberType() { domain instanceof RealDomain }
}
/**
* A floating-point type representing a complex number.
*/
class ComplexNumberType extends FloatingPointType {
ComplexNumberType() { domain instanceof ComplexDomain }
}
/**
* A floating-point type representing an imaginary number.
*/
class ImaginaryNumberType extends FloatingPointType {
ImaginaryNumberType() { domain instanceof ImaginaryDomain }
}
/**
* A floating-point type whose representation is base 2.
*/
class BinaryFloatingPointType extends FloatingPointType {
BinaryFloatingPointType() { base = 2 }
}
/**
* A floating-point type whose representation is base 10.
*/
class DecimalFloatingPointType extends FloatingPointType {
DecimalFloatingPointType() { base = 10 }
}
/**
* The C/C++ `float` type.
* ```
* float f;
* ```
*/
class FloatType extends RealNumberType, BinaryFloatingPointType {
FloatType() { builtintypes(underlyingElement(this), _, 24, _, _, _) }
override string getAPrimaryQlClass() { result = "FloatType" }
}
/**
* The C/C++ `double` type.
* ```
* double d;
* ```
*/
class DoubleType extends RealNumberType, BinaryFloatingPointType {
DoubleType() { builtintypes(underlyingElement(this), _, 25, _, _, _) }
override string getAPrimaryQlClass() { result = "DoubleType" }
}
/**
* The C/C++ `long double` type.
* ```
* long double ld;
* ```
*/
class LongDoubleType extends RealNumberType, BinaryFloatingPointType {
LongDoubleType() { builtintypes(underlyingElement(this), _, 26, _, _, _) }
override string getAPrimaryQlClass() { result = "LongDoubleType" }
}
/**
* The GNU C `__float128` primitive type. This is not standard C/C++.
* ```
* __float128 f128;
* ```
*/
class Float128Type extends RealNumberType, BinaryFloatingPointType {
Float128Type() { builtintypes(underlyingElement(this), _, 38, _, _, _) }
override string getAPrimaryQlClass() { result = "Float128Type" }
}
/**
* The C/C++ `void` type. See 4.7.
* ```
* void foo();
* ```
*/
class VoidType extends BuiltInType {
VoidType() { builtintypes(underlyingElement(this), _, 3, _, _, _) }
override string getAPrimaryQlClass() { result = "VoidType" }
}
/**
* The C/C++ wide character type.
*
* Note that on some platforms `wchar_t` doesn't exist as a built-in
* type but a typedef is provided. Consider using the `Wchar_t` QL