The type of the expression ‘1’ is char. The type of the expression (test ? 3 : ‘1’) is at least int (or an unsigned version thereof; portably it is std::common_type_t<int, char>). Therefore the two invocations of the << operator select different overloads: The former prints the character as is, the latter formats the integer … Read more
Standard writes in 8.5.4.1: List-initialization Note: List-initialization can be used as the initializer in a variable definition (8.5) as the initializer in a new expression (5.3.4) in a return statement (6.6.3) as a function argument (5.2.2) as a subscript (5.2.1) as an argument to a constructor invocation (8.5, 5.2.3) as an initializer for a non-static … Read more
Of course you can use IfThen(SomeBooleanExpression, IfTrueReturnValue, IfFalseReturnValue) where the return values are numeric (uses Math) or string (uses StrUtils). But notice that this will evaluate both arguments in all cases — there is no lazy evaluation, so it is not as efficient as the ?: operator in C#, where only the right operand is … Read more
I’d usually write this as: $review = ( defined($model->test) ? 1 : ” ); where the parentheses are for clarity for other people reading the code.
This has nothing to do with how the return type is deduced and everything to do with operator precedence. When you have std::cout << (abs(c2-c1) == abs(r2-r1)) ? 1 : 2 << std::endl; it isn’t std::cout << ((abs(c2-c1) == abs(r2-r1)) ? 1 : 2) << std::endl; because ?: has lower precedence than <<. That means … Read more
Note that cmake 3.8 added exactly what you want to generator expressions … $<IF:?,true-value…,false-value…> true-value… if ? is 1, false-value… if ? is 0 Example usage: target_link_libraries(MyLib PUBLIC $<IF:$<CONFIG:Debug>,cppzmq,cppzmq-static> ) Where cppzmq is shared library used in Debug build and cppzmq-static is static library used in other case e.g. Release
For the sake of readability, I only use a ternary if it fits into one 80-char line.
Nope you cannot do that. The spec says so. The conditional operator has three operand expressions. ? appears between the first and second expressions, and : appears between the second and third expressions. The first expression must be of type boolean or Boolean, or a compile-time error occurs. It is a compile-time error for either … Read more
Your C code doesn’t contain two return statements. Neither should your python code… The translation of your ternary expression is n if n<m else m, so just use that expression when you return the value: def minn(n,m): return n if n<m else m