On 5/5/21 7:15 PM, Keith Busch wrote:
Thank you, that makes sense. In this case, we are talking about an integer constant expression for the value of a 'const' symbol. That seems like perfect fodder for a compiler to optimize. I understand it's not obligated to do that, but I assumed it would.
It probably did compile the code such that there is no variable-sized allocation from the stack. That optimization does not change the *semantics* of the code as written -- the only reason this compiles is via use of a variable length array.
r~
