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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
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