CodeQL library for C/C++
codeql/cpp-all 2.0.2-dev (changelog, source)
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Class GNUVectorType

A GNU/Clang vector type.

In both Clang and GNU compilers, vector types can be introduced using the __attribute__((vector_size(byte_size))) syntax. The Clang compiler also allows vector types to be introduced using the ext_vector_type, neon_vector_type, and neon_polyvector_type attributes (all of which take an element count rather than a byte size).

In the example below, both v4si and float4 are GNU vector types:

typedef int v4si __attribute__ (( vector_size(4*sizeof(int)) ));
typedef float float4 __attribute__((ext_vector_type(4)));

Import path

import cpp

Direct supertypes

Indirect supertypes

Predicates

explain

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.

getAPrimaryQlClass

Gets the name of a primary CodeQL class to which this element belongs.

getAlignment

Gets the alignment of this type in bytes.

getNumElements

Get the number of elements in this vector type.

getSize

Gets the size, in bytes, of this vector type.

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).

Inherited predicates

findRootCause

Gets the source of this element: either itself or a macro that expanded to this element.

from Element
fromSource

Holds if this element may be from source. This predicate holds for all elements, except for those in the dummy file, whose name is the empty string. The dummy file contains declarations that are built directly into the compiler.

from Element
getASpecifier

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.

from Type
getATypeNameUse

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.

from Type
getAnAttribute

Gets an attribute of this type.

from Type
getBaseType

Gets the base type of this derived type.

from DerivedType
getEnclosingElement

Gets the closest Element enclosing this one.

from Element
getFile

Gets the primary file where this element occurs.

from Element
getLocation

Gets the primary location of this element.

from Type
getName

Gets the name of this type.

from DerivedType
getParentScope

Gets the parent scope of this Element, if any. A scope is a Type (Class / Enum), a Namespace, a BlockStmt, a Function, or certain kinds of Statement.

from Element
getPointerIndirectionLevel

Gets the pointer indirection level of this type.

from Type
getPrimaryQlClasses

Gets a comma-separated list of the names of the primary CodeQL classes to which this element belongs.

from ElementBase
getUnderlyingType

Gets this type after typedefs have been resolved.

from Type
getUnspecifiedType

Gets this type after specifiers have been deeply stripped and typedefs have been resolved.

from Type
hasName

Holds if this type is called name.

from Type
hasSpecifier

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.

from Type
internal_getAnAdditionalSpecifier

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.

from Type
involvesReference

Holds if this type involves a reference.

from DerivedType
involvesTemplateParameter

Holds if this type involves a template parameter.

from DerivedType
isAffectedByMacro

Holds if this element is affected in any way by a macro. All elements that are totally or partially generated by a macro are included, so this is a super-set of isInMacroExpansion.

from Element
isConst

Holds if this type is const.

from Type
isDeeplyConst

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.

from Type
isFromTemplateInstantiation

Holds if this Element is a part of a template instantiation (but not the template itself).

from Element
isFromUninstantiatedTemplate

Holds if this Element is part of a template template (not if it is part of an instantiation of template). This means it is represented in the database purely as syntax and without guarantees on the presence or correctness of type-based operations such as implicit conversions.

from Element
isInMacroExpansion

Holds if this element comes from a macro expansion. Only elements that are entirely generated by a macro are included - for elements that partially come from a macro, see isAffectedByMacro.

from Element
isVolatile

Holds if this type is volatile.

from Type
refersTo

Holds if this type refers to type t (by default, a type always refers to itself).

from Type
refersToDirectly

Holds if this type refers to type t directly.

from DerivedType
resolveTypedefs

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.

from Type
stripTopLevelSpecifiers

Gets this type after any top-level specifiers and typedefs have been stripped.

from Type
stripType

Gets the type stripped of pointers, references and cv-qualifiers, and resolving typedefs. For example, given typedef const C& T, stripType returns C.

from DerivedType
toString

Gets a textual representation of this element.

from DerivedType

Charpred