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[Python-ideas] Briefer string format
MRABpython at mrabarnett.plus.com
Wed Jul 22 22:21:54 CEST 2015
On 2015-07-22 19:52, Eric V. Smith wrote:> On 07/20/2015 03:22 PM, Guido van Rossum wrote:>> Not sure what you mean by "implicit merging" -- if you mean literal>> concatenation (e.g. 'foo' "bar" == 'foobar') then I think it should be>> allowed, just like we support mixing quotes and r''.>> Do we really want to support this? It complicates the implementation,> and I'm not sure of the value.>> f'{foo}' 'bar' f'{baz}'> becomes something like:> format(foo) + 'bar' + format(baz)>> You're not merging similar things, like you are with normal string> concatenation.>> And merging f-strings:> f'{foo}' f'{bar'}> similarly just becomes concatenating the results of some function calls.>> I guess it depends if you think of an f-string as a string, or an> expression (like the function calls it will become). I don't have a real> strong preference, but I'd like to get it ironed out logically before> doing a trial implementation.>As Guido said, we can merge raw string literals.It would be a gotcha if: r'{foo}' 'bar'worked but: f'{foo}' 'bar'didn't. You'd then have to how they're different even though they looka lot alike.
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