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Created page with ' Agreed Detail Changes to OOP344/BTP300 OOP344/BTP300 – C++ Part new - add to align with C++11 types - specification and qualification trivial - redefinition of char …'
Agreed Detail Changes to OOP344/BTP300
OOP344/BTP300 – C++ Part
new - add to align with C++11
types - specification and qualification
trivial - redefinition of char modified to be the size necessary to store 8-bit coding of UTF-8 and basic execution character set
wchar_t, char16_t, char32_t – Unicode support for UTF-16 and UTF-32
trivial - constexpr – function or object constructor is a compile-time constant – qualifier on types other than int enum
trivial - decltype() deduces the type of the expression at compile time
trivial - enum forward declarations admissible as long as the size is specified
using syntax alternative for typedef – using OtherType = ... ;
trivial - thread_local storage duration – variable unique to the thread
expressions
trivial - sizeof() works on members of uninstantiated classes
trivial - L' ' and L” “ - prefix for wide character
trivial - codepoint constants defined using \u \U
string literals defined using prefixes u8” ” u” ” and U” ”
trivial - R” “ raw string literal avoids escaping strings manually cf. XML files, scripts, regex
trivial - R can be combined with wide-character literal or Unicode prefixes
functions
anonymous (lambda) functions [](int x){ return x + 2; } - return type is implicit as long as all expressions return the same type
alternate trailing-return-type function syntax auto foo(int a, int b) -> decltype(a + b) { return a + b; }
encapsulation
constexpr ctor – contains only constant expression
rvalues – modifiable temporaries – T&& – to avoid deep copies on pass/return by value - move constructor T::T(T&&) copies pointer out of rvalue into new temp and sets rvalue pointer to nullptr – move assignment operator T& T::operator=(T&&)
trivial - delegated construction allows default value to be changed without recompilation of application code (e.g. SomeType() : SomeType(42))
trivial - SomeType() = default explicit default
trivial - explicit conversion operators – keyword can be applied here also
trivial - less restrictions on members of a union
inheritance
trivial - inherited constructors – using BaseClass::BaseClass
trivial - override identifier of base class virtual function
trivial - final identifier – prevent further overrides
polymorphism - fuller generic programming support - templates
trivial - extern template – do not instantiate template in this translation unit
trivial - right angle bracket closes the template where it is reasonable
using syntax for typedef – cf. Template aliases
trivial - variadic templates just extends variadic syntax to templates
trailing return type function syntax auto foo(const T& a, const T& b) -> decltype(a + b) { return a + b; } - return type is unknown for template type T
trivial - static_assert(,) for templates
library
initializer lists – extends from POD cases to all classes including std containers - initialization-list constructor – T::T(std::initializer_list<type> list) – initializer list is constant and the data in its members cannot be changed
multi-threading support
other features
uniform initialization – uses initializer-list syntax – aggregate initialization, constructor, return list without explicit type
trivial - static_assert(,) – tests assertion at compile-time
OOP344/BTP300 – C Part
extend existing pre-defined macros to align with C11
pre-defined macros to identify installed features __STDC_*__
trivial - currently covered in C++ part - add to align with C99
inline functions
anonymous structures and unions
new - add to align with C99 and C++11
bool macro, _Bool data type (C99)
variadic macros
Unicode support – same as C++
static assertions – evaluated later than #if and #error
bounds-checking – list of safe alternative library functions for robust programming
multi-threading support