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On 19 August 2016 at 21:50, C Anthony Risinger <anthony@xtfx.me> wrote:
The only real point I'm trying to make is that expressions within an f-string are an *escape*. They escape the normal semantics of a string literal and instead do something else for a while. Therefore, the escaped sections should not look like (or need to conform to) the rest of the string and they should not require quoting as if it were still within the string, because I escaped it already!
So, to me f'{x.partition(' + ')[0]}' reads as a string concatenation. I'm not sure how you'd expect a syntax highlighter to make it look like anything else, to be honest (given that you're arguing *not* to highlight the whole of the content of the f-string the same way). The *real* solution is not to write something like this, instead write f"{x.partition(' + ')[0]}" That makes it easy for *humans* to read. Computers parsing it is irrelevant. Once you do that, the proposal here (that unescaped quotes can be used in an f-string) also becomes irrelevant - this expression parses exactly the same way under both the current code and the proposed approach. And that's generally true - code that is clearly written should, in my mind, work the same way regardless. So the proposal ends up being merely "choose your preference as to which form of badly-written code is a syntax error". So the only relevance of syntax highlighting is how badly it fails when handling badly-written or syntactically incorrect code. And detecting an f-string just like you detect any other string, is *much* better behaved in that situation. Detecting a closing quote is simple, and isn't thrown off by incorrect nesting. If you want the *content* of an f-string to be highlighted as an expression, Vim can do that, it can apply specific syntax when in another syntax group such as an f-string, and I'm sure other editors can do this as well - but you should do that once you've determined where the f-string starts and ends. Paul