[code-reflection] RFR: 8324789: Add line number information to code models [v2]

[Maurizio Cimadamore]

On Thu, 18 Apr 2024 15:25:59 GMT, Paul Sandoz <psandoz at openjdk.org> wrote:

> I was pondering aliasing `null`, such as `static final Location NOLOCATION = null`.

Ok. As long as the javadoc captures the intended semantics, I don't have a strong preference. Maybe a mild one for `Optional` given that (a) using nulls will cause NPEs (given this info truly is optional), and (b) having a "no location" singleton is equally odd (what's it's source/column number?). So, denoting absence as just absence seems (slightly) better from a modelling perspective.

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PR Review Comment: https://git.openjdk.org/babylon/pull/54#discussion_r1579253173