Difference between revisions of "cpp/types"
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| + | ===Defect reports=== | ||
| + | {{dr list begin}} | ||
| + | {{dr list item|wg=lwg|dr=4036|std=C++11|before={{tt|__alignof_is_defined}} was underspecified in the C++ standard|after=specified and deprecated}} | ||
| + | {{dr list end}} | ||
===See also=== | ===See also=== | ||
Revision as of 00:59, 23 March 2024
See also type system overview and fundamental types defined by the language.
Contents |
Additional basic types and macros
| Defined in header
<cstddef> | |
| unsigned integer type returned by the sizeof operator (typedef) | |
| signed integer type returned when subtracting two pointers (typedef) | |
| (C++11) |
the type of the null pointer literal nullptr (typedef) |
| implementation-defined null pointer constant (macro constant) | |
| (C++11) |
trivial type with alignment requirement as great as any other scalar type (typedef) |
| byte offset from the beginning of a standard-layout type to specified member (function macro) | |
| (C++17) |
the byte type (enum) |
| Defined in header
<stdbool.h> | |
| __bool_true_false_are_defined (C++11)(deprecated) |
C compatibility macro constant, expands to integer literal 1 (macro constant) |
| Defined in header
<stdalign.h> | |
| __alignas_is_defined (C++11)(deprecated) |
C compatibility macro constant, expands to integer literal 1 (macro constant) |
| __alignof_is_defined (C++11)(deprecated) |
C compatibility macro constant, expands to integer literal 1 (macro constant) |
Fixed width integer types (since C++11)
Fixed width floating-point types (since C++23)
Numeric limits
| Defined in header
<limits> | |
| provides an interface to query properties of all fundamental numeric types (class template) | |
C numeric limits interface
Runtime type identification
| Defined in header
<typeinfo> | |
| contains some type’s information, the class returned by the typeid operator (class) | |
| exception that is thrown if an argument in a typeid expression is null (class) | |
| exception that is thrown by an invalid dynamic_cast expression, i.e. a cast of reference type fails (class) | |
| Defined in header
<typeindex> | |
| (C++11) |
wrapper around a type_info object, that can be used as index in associative and unordered associative containers (class) |
Defect reports
The following behavior-changing defect reports were applied retroactively to previously published C++ standards.
| DR | Applied to | Behavior as published | Correct behavior |
|---|---|---|---|
| LWG 4036 | C++11 | __alignof_is_defined was underspecified in the C++ standard
|
specified and deprecated |
See also
| C documentation for Type support library
|
