Safely Until They Die – Alisdair Meredith & Nina Ranns, Thursday 10:30am ■ Embracing `noexcept` Operators and Specifiers Safely – John Lakos, Thursday 3:15pm 10/26/21 Pablo Halpern, 2021 (CC BY 4.0) aren't UDLs just syntactic sugar? ■ You betcha! ■ So is operator overloading. ■ So are infix operators in general! – a+b is just syntactic sugar for plus(a, b) ■ Syntactic sugar is about readability; 17Namespaces for literals ■ UDL operators are looked up using ordinary name lookup, no namespace qualifiers allowed. ■ To avoid collisions between similar UDL suffixes, UDL operators are usually put in their

function for each scalar type - GraphBLAS supports a wide variety of scalar types and binary operators - Combinatorial explosion 47 float* a_ptr = get_matrix(...); cblas_sgemm(..., m, n, k, 1.0f, function for each scalar type - GraphBLAS supports a wide variety of scalar types and binary operators - Combinatorial explosion[DISTRIBUTION STATEMENT A] This material has been approved for public function for each scalar type - GraphBLAS supports a wide variety of scalar types and binary operators - Combinatorial explosion[DISTRIBUTION STATEMENT A] This material has been approved for public

the interfaces of interest, the most pervasively and unconsciously used, are the fundamental operators common to all C++ built-in types, as extended to user-defined types, eg. copy constructors, assignment http://stepanovpapers.com/DeSt98.pdf We must investigate the relations which must hold among these operators to preserve consistency with their semantics for the built-in types and with the expectations Stepanov 1998 http://stepanovpapers.com/DeSt98.pdf We can produce an axiomatization of these operators which: yields the required consistency with built-in types matches the intuitive expectations

only valid use of the expression *p is on the left side of an assignment statement • Comparison operators are not required – no end of sequence is assumed • Output iterators model an "infinite sink" Input Iterators – Read Forward, Single-Pass • p == q does not imply ++p == ++q • The comparison operators are provided to check whether an input iterator is equal to the past-the-end iterator • All iterators capabilities and guarantees • Emulate pointers • Provide operators for iterator arithmetic, analogous to pointer arithmetic • Provide relational operators to compare positionCppCon 2021 – Back to Basics: Classic

v(arr, arr + sizeof(arr) / sizeof(arr[0])); vector v = {1,2,3,4};Operator Overloading Use operators to call custom functions for specific types. std::filesystem::path p = "C:"; return p / "files" v=Cb0j6DVmwzYLexy - DSL Create parsers by defining a struct with rule and value. Combine parsers with operators. struct json_value : /*...*/ { static constexpr auto rule = [] { auto primitive = dsl::p "int highlight_works = 42; spaces will collapse"));YACP – Yet Another Compile-Time Parser DSL and operators similar to Lexy and Boost::Spirit. Uses fixed size containers as return type. auto choice_parser

short-circuiting is not part of composability here; it's just a semantic nicety of the operators. it's just a semantic nicety of the operators.CHAIN OF RESPONSIBILITY CHAIN OF RESPONSIBILITY A design pattern that exploits represent N (32?) bools bools,, using using bitand bitand ( (&&) and ) and bitor bitor ( (||) operators. ) operators. That's sometimes useful, but really That's sometimes useful, but really just an extension

execution environment. (my emphasis) […] • [expr.pre](7.1) […] An expression is a sequence of operators and operands that specifies a computation. An expression can result in a value and can cause side them • Expressions with non-observable side effects may be ignored • Expression - a sequence of operators and operands that specifies a computation • Side effects - changes in the program’s execution Functions consist of statements • Statements consist of expressions • An expression is a sequence of operators and operands that specifies a computation • To perform that computation, the expression must be

has a destructor, the properties for which it generates copy constructors and copy assignment operators are deprecated. • C language style type conversion is deprecated (ie using (convert_type)) before generating default constructors, copy constructs, assignment operators, and destructors for the object. Besides, C++ also defines operators such as new delete for all classes. This part of the function has designed the concept of copy/copy for class objects through copy constructors and assignment operators, but to implement the movement of resources, The caller must use the method of copying and then

suffix or exponent (e or p) .1. Just one point (dot) • In floating-point literals • Member access operators • Member of object template struct S { template void foo() {} in a; s.template foo(); } .1. Just one point (dot) • In floating-point literals • Member access operators • Member of object • Pointer to member of object struct S { int mi; int f(int n) const; }; << (x.*pf)(6) << endl; .1. Just one point (dot) • In floating-point literals • Member access operators • Member of object • Pointer to member of object • In module names export module Main.SubM.SubSubM;

supports all the logic operators to manipulate bits that you have in C uint32_t value = 0; value |= 0x1; value &= ~(0x1);How to operate on the registers C++ supports all the logic operators to manipulate bits = 0; value |= 0x1; value &= ~(0x1);How to operate on the registers C++ supports all the logic operators to manipulate bits that you have in C This will all work! But… C++ can do these operations more