Question

On MSVC v9.0, if I do this:

int myvalue;
myvalue = true ? 1 : 0;

then it seems that ?: is evaluated before ‘=’. Is this a guarantee? I am using this table as a reference:
http://en.cppreference.com/w/cpp/language/operator_precedence

However, both operators are in the same row, so I’m not sure if they are evaluated in the order I expect or if this is guaranteed by the standard. Can anyone clarify this?

Answer 1

From your link:

Operators that are in the same cell (there may be several rows of operators listed in a cell) are evaluated with the same precedence, in the given direction. For example, the expression a=b=c is parsed as a=(b=c), and not as (a=b)=c because of right-to-left associativity.

Since both = and ?: are in the same cell and have right-to-left associativity, the ternary is guaranteed to evaluate first.