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Add field accessing and indexing of arguments to format! #8614

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tikue opened this issue Aug 19, 2013 · 6 comments
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Add field accessing and indexing of arguments to format! #8614

tikue opened this issue Aug 19, 2013 · 6 comments
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A-syntaxext Area: Syntax extensions C-enhancement Category: An issue proposing an enhancement or a PR with one.

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@tikue
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tikue commented Aug 19, 2013

This would be nice if for no other reason than to reach feature parity with Python's str.format(), in which one can write things like:

>>> "{foo[0]} and {foo[1]} went up the hill".format(foo=['jack', 'jill']) 'jack and jill went up the hill'
@huonw
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huonw commented Nov 16, 2013

Triage: working on this.

@huonw
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huonw commented Nov 24, 2013

(This ended up being more subtle than I thought, and will likely take a bit of rearranging of the format!() code to do properly; I'm still working on it, but slowly, so if someone wants to take over, feel free to consult with me (or not, and just open a PR, that's OK too).)

@alexcrichton alexcrichton changed the title Add field accessing and indexing of arguments to ifmt! Add field accessing and indexing of arguments to format! Jun 9, 2014
@steveklabnik
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Triage: nothing has changed here.

@steveklabnik
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Triage: no change

@sfackler
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Seems like this is something that should be over on rfcs?

@steveklabnik
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Yeah, this would be a pretty big change, probably rfc-worthy.

flip1995 pushed a commit to flip1995/rust that referenced this issue Apr 21, 2022
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Auto merge of rust-lang#8614 - pitaj:fix-7597, r=giraffate
80bcd9b 
assertions_on_constants: ignore indirect `cfg!`

Fixes rust-lang#7597

changelog: [`assertions_on_constants`] ignore constants indirectly based on `cfg!`
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A-syntaxext Area: Syntax extensions C-enhancement Category: An issue proposing an enhancement or a PR with one.
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