SE-0354: Regex Literals

[Lantua]

Was this change upstreamed in the proposal, or is there an edited version somewhere? It still deprecates prefix / in the proposal.

[hamishknight]

@Lantua

Was this change upstreamed in the proposal, or is there an edited version somewhere? It still deprecates prefix / in the proposal.

I have a PR up to amend the proposal: [SE-0354] Update regex literal proposal by hamishknight · Pull Request #1651 · apple/swift-evolution · GitHub

[ben-cohen (BenC)]

@xwu

Even if whitespaces are semantic in multiline regex literals, one would expect the leading and trailing newlines to be ignored by analogy with string literals. Is this not proposed to be the case? If not, why not?

Can I check if this question is addressing the proposal, or @Paul_Cantrell's thoughts?

The proposal is that with multi-line literals, whitespace is not semantic. So leading and trailing newlines are ignored, not just by analogy with string literals but because all whitespace is ignored.

[xwu (Xiaodi Wu)]

@ben-cohen

Can I check if this question is addressing the proposal, or @Paul_Cantrell's thoughts?

The proposal is that with multi-line literals, whitespace is not semantic. So leading and trailing newlines are ignored, not just by analogy with string literals but because all whitespace is ignored.

I was asking about the proposal; this makes sense.

I think I misunderstood @Paul_Cantrell's example, where it's the internal space between "hello" and "world" that becomes ignored in the case of a multiline literal, causing it not to match "hello world". That's...unfortunate but a different issue.

[ben-cohen (BenC)]

Review Update

The core team has decided to return the proposal for revision and a second review is now running.

I have moved some of the recent discussion to that review thread.