Firstly, application (whitespace) is the highest precedence “operator”. Secondly, in Haskell, there’s really no distinction between operators and functions, other than that operators are infix by default, while functions aren’t. You can convert functions to infix with backticks 2 `f` x and convert operators to prefix with parens: (+) 2 3 So, your question is … Read more
Yes, the MSDN article is in error, at least with respect to standard C and C++1. Having said that, let me start with a note about terminology: in the C++ standard, they (mostly–there are a few slip-ups) use “evaluation” to refer to evaluating an operand, and “value computation” to refer to carrying out an operation. … Read more
Operator precedence is fixed in the Scala Reference – 6.12.3 Infix Operations by the first character in the operator. Listed in increasing order of precedence: (all letters) | ^ & = ! < > : + – * / % (all other special characters) And it’s not very probable that it will change. It will … Read more
The actual execution of MySQL statements is a bit tricky. However, the standard does specify the order of interpretation of elements in the query. This is basically in the order that you specify, although I think HAVING and GROUP BY could come after SELECT: FROM clause WHERE clause SELECT clause GROUP BY clause HAVING clause … Read more
You are nearly correct but you are subtly misunderstanding how the precedence rules work. Compare these two cases: int t1 = 5; int t2 = t1 + (++t1); System.out.println (t2); t1 = 5; t2 = (++t1) + t1; System.out.println (t2); The result is: 11 12 The precedence does indeed say to evaluate the ++ before … Read more
It depends on the argument type, the called function’s calling convention, the archtecture and the compiler. On an x86, the Pascal calling convention evaluates arguments left to right whereas in the C calling convention (__cdecl) it is right to left. Most programs which run on multiple platforms do take into account the calling conventions to … Read more
i += Increment(ref i); is equivalent to i = i + Increment(ref i); The expression on the right hand side of the assignment is evaluated from left to right, so the next step is i = 0 + Increment(ref i); return i++ returns the current value of i (which is 0), then increments i i … Read more
Python uses the symbol – as both a unary (-x) and a binary (x-y) operator. These have different operator precedence. In specific, the ordering wrt // is: unary – binary // binary – By introducing a 0 as 0–3//2, the first – is a binary – and is applied last. Without a leading 0 as … Read more
Association direction, which controls the order of operators having their arguments evaluated, is not defined for the == method, same as for ===, !=, =~ and <=> methods as well (all of which have the same precedence and form a separate precedence group exclusively). Documentation Thus evaluation order in case of multiple operators from the … Read more
All the answers explaining why you get 2 and not 1 are actually wrong. According to the PHP documentation, mixing + and ++ in this manner is undefined behavior, so you could get either 1 or 2. Switching to a different version of PHP may change the result you get, and it would be just … Read more