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c++ Programming Glossary: expressionsWhat is an undefined reference/unresolved external symbol error and how do I fix it? http://stackoverflow.com/questions/12573816/what-is-an-undefined-reference-unresolved-external-symbol-error-and-how-do-i-fix macro invocations are expanded and _Pragma unary operator expressions are executed. SNIP Each source character set member in a character..
Undefined, unspecified and implementation-defined behavior http://stackoverflow.com/questions/2397984/undefined-unspecified-and-implementation-defined-behavior dereferencing the null pointer or writing allegedly clever expressions like i i . Section 1.9 of the C standard also mentions undefined..
http://stackoverflow.com/questions/3106110/what-is-move-semantics objects. The parameter const string that binds to all expressions of type string which allows you to make copies in the following.. and meant the exact same object every time We call expressions such as x lvalues . The arguments in lines 2 and 3 are not lvalues..
What are rvalues, lvalues, xvalues, glvalues, and prvalues? http://stackoverflow.com/questions/3601602/what-are-rvalues-lvalues-xvalues-glvalues-and-prvalues become five categories. What are these new categories of expressions How do these new categories relate to the existing rvalue and.. whole massacre began with the move semantics. Once we have expressions that can be moved and not copied suddenly easy to grasp rules.. suddenly easy to grasp rules demanded distinction between expressions that can be moved and in which direction. From what I guess..
Undefined Behavior and Sequence Points http://stackoverflow.com/questions/4176328/undefined-behavior-and-sequence-points and Sequence Points I often use funny and convoluted expressions like a i i to make myself feel better. Why should I stop using.. point here in the evaluation of each of the following expressions after the evaluation of the first expression §1.9 18 2 a b §5.14.. arguments if any which takes place before execution of any expressions or statements in the function body §1.9 17 . 1 Note the evaluation..
Where and why do I have to put the “template” and “typename” keywords? http://stackoverflow.com/questions/610245/where-and-why-do-i-have-to-put-the-template-and-typename-keywords different groups One catches types another catches expressions. Expressions may depend by their value and or their type. So.. types e.g a type template parameter T Value dependent expressions e.g a non type template parameter N Type dependent expressions.. e.g a non type template parameter N Type dependent expressions e.g a cast to a type template parameter T 0 Most of the rules..
Does it make sense for unary operators to be associative? http://stackoverflow.com/questions/12961351/does-it-make-sense-for-unary-operators-to-be-associative you haven't before I recommend that you read through the Expressions chapter ignoring the semantics look only at the grammar productions...
Are multiple mutations within initializer lists undefined behavior? http://stackoverflow.com/questions/14442894/are-multiple-mutations-within-initializer-lists-undefined-behavior the code is valid and does not have undefined behavior. Expressions in an initizalizer list are evaluated left to right and sequenced..
Pointer expressions: *ptr++, *++ptr and ++*ptr http://stackoverflow.com/questions/18481740/pointer-expressions-ptr-ptr-and-ptr I am unable to understand by myself. What do these three Expressions REALLY mean ptr ptr ptr I have tried Ritchie. But unfortunately..
Error : Operand for operator “++” must be an lvalue http://stackoverflow.com/questions/18819570/error-operand-for-operator-must-be-an-lvalue section in an older draft standard would be section 5 Expressions paragraph 4 which says ... Between the previous and next sequence..
Are multiple mutations of the same variable within initializer lists undefined behavior pre C++11 http://stackoverflow.com/questions/19881803/are-multiple-mutations-of-the-same-variable-within-initializer-lists-undefined-b initializer list so it seems we are left with Chapter 5 Expressions paragraph 4 which says Except where noted the order of evaluation..
What would the evaluation order of x = x++ + ++x; be? [duplicate] http://stackoverflow.com/questions/2367969/what-would-the-evaluation-order-of-x-x-x-be reservation The relevant part of the C99 standard is 6.5 Expressions 2 Between the previous and next sequence point an object shall..
rvalues and temporary objects in the FCD http://stackoverflow.com/questions/3007728/rvalues-and-temporary-objects-in-the-fcd object the prvalue std string hello and the lvalue str . Expressions are not objects but their evaluation might yield one. Specifically..
Implicit conversion not happening http://stackoverflow.com/questions/3888082/implicit-conversion-not-happening float c 1 compiles b a c 2 fails b c 3 compiles return 0 Expressions 1 and 3 work perfectly while expression 2 does not compile...
http://stackoverflow.com/questions/5416414/signed-unsigned-comparisons e.g. the following is true 1 2U . EDIT References 5 9 Expressions Many binary operators that expect operands of arithmetic or..
Operator Precedence vs Order of Evaluation http://stackoverflow.com/questions/5473107/operator-precedence-vs-order-of-evaluation operators with higher or lower precedence are present. Expressions with higher precedence operators are evaluated first. Precedence.. tighter binding. Now about the above article It mentions Expressions with higher precedence operators are evaluated first. It may..
Where and why do I have to put the “template” and “typename” keywords? http://stackoverflow.com/questions/610245/where-and-why-do-i-have-to-put-the-template-and-typename-keywords template arguments you use to instantiate the template Expressions may have different types or values variables may have different.. groups One catches types another catches expressions. Expressions may depend by their value and or their type. So we have with..
What's this C++ syntax that puts a brace-surrounded block where an expression is expected? http://stackoverflow.com/questions/6305396/whats-this-c-syntax-that-puts-a-brace-surrounded-block-where-an-expression-is it is done by using a Statement Expression . Statement Expressions are gnu gcc compiler extension are not supported by the C C.. portable. The IBM IBM XL C C v7.0 also support Statement Expressions it's doccumentation explains them aptly Statement Expressions.. it's doccumentation explains them aptly Statement Expressions A compound statement is a sequence of statements enclosed by..
Regular Expressions misunderstanding or just broken implementation? http://stackoverflow.com/questions/7696063/regular-expressions-misunderstanding-or-just-broken-implementation Expressions misunderstanding or just broken implementation I tried a very..
Return type of '?:' (ternary conditional operator) http://stackoverflow.com/questions/8535226/return-type-of-ternary-conditional-operator operator lvalue share improve this question Expressions don't have return types they have a type and as it's known in..
Lightweight and portable regex library for C/C++? [closed] http://stackoverflow.com/questions/923500/lightweight-and-portable-regex-library-for-c-c really good things about PCRE Perl Compatible Regular Expressions And a couple of year ago I used Microsoft's GRETA but it seems..
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