Exercise 3: "Analyze Will Catch Bugs in My Swift Code" — Possible Solution
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TASK
State what the sources support, what they do not, and how you would find out
for your own project.

WHAT THE SOURCES SUPPORT
- Xcode's static analyzer is the Clang static analyzer, run with
  Product -> Analyze or Shift-Command-B.
- It finds hard-to-produce bugs without running the code and shows the steps
  where the bug occurs.
- A summary says it finds bugs in C, C++ and Objective-C code, including in
  mixed projects, but does not directly analyze pure Swift code in current
  Xcode versions.

WHAT THEY DO NOT SUPPORT
That it analyzes Swift. The summary says the opposite, though I could not
confirm it against Apple's documentation, and a WWDC21 session on the
analyzer was not readable.

HOW TO FIND OUT
Write a small Swift function with an obvious problem, run Product ->
Analyze, and see whether it reports anything. Then read Apple's current
static analyzer documentation for your Xcode version.

REWRITE
"Analyze finds bugs in C-family code, and reportedly not in pure Swift;
check with a test file in your own project."