Try? vs ? (and is there a comprehensive Swift operator precedence table?)

[xwu (Xiaodi Wu)]

try is one of several operators with magical behavior not expressible in terms of Swift’s ordinary precedence rules:

Exponentiation operator and precedence group

If only it were that simple: // E.g. 'fn() as Int << 2'. // In this case '<<' has higher precedence than 'as', but the LHS should // be 'fn() as Int' instead of 'Int'. // If the left-hand-side is a 'try' or 'await', hoist it up turning // "(try x) + y" into try (x + y). // If this is an assignment operator, and the left operand is an optional // evaluation, pull the operator into the chain. // If the right operand is a try or await, it's an error unless the operator // is …

Reading the source code quoted in that post will give you some idea of how try interacts with other operators in terms of the “hoisting” behavior.