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Articles by Sebastian Redl
Evaluation order of function arguments and default arguments
The order of evaluation (i.e. determining the value) of function arguments is not specified. The compiler is free to execute them in any order, and even intermingled if there are no other factors stopping it from doing so. Evaluation of default arguments happens in the context of the caller, not the callee. So the call to f() is necessary for one argument, and reading the global variable p for the other.
Did A&W customers think 1/3 pound burger patties weigh less than 1/4 pound ones?
The source of this image is an article in NY Times Magazine, the text of which (about a quarter down the page) is quoted exactly. Kevin Drum, a blogger for MotherJones, tried to track down the source of this anecdote. He found a tweet by the article's author, Elizabeth Green, saying that she got it from "Threshold Resistance", the memoirs of Alfred Taubman, then-owner of A&W.
Why does GCC define unary operator '&&' instead of just using '&'?
GCC added this extension to be used in initializing a static array that will serve as a jump table: Where , and are labels. Then a label can be selected with indexing, like this: Further it says in section 6.2.3: If more than one declaration of a particular identifier is visible at any point in a translation unit, the syntactic context disambiguates uses that refer to different entities.
Why can't constructors deduce template arguments?
The name of the class you want to instantiate is (as you indicate). It is also possible to write , or , or . In those cases, however, you don't expect the compiler to be able to guess the type if you write only .
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