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macro_rules should expose accessors for total iteration count and current iteration number #407

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pnkfelix opened this issue Oct 23, 2014 · 4 comments
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macro_rules should expose accessors for total iteration count and current iteration number #407

pnkfelix opened this issue Oct 23, 2014 · 4 comments
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A-macros Macro related proposals and issues A-syntax Syntax related proposals & ideas postponed RFCs that have been postponed and may be revisited at a later time. T-lang Relevant to the language team, which will review and decide on the RFC.

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@pnkfelix
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macro_rules should expose accessors that map each Kleene-star/plus $(pat)<delim>* / $(pat)<delim>+ to a total iteration count and the current iteration number within the expansion template.

See RFC PR #88 for discussion, including on proposed syntax in the RFC itself, as well as much discussion about alternative syntaxes in the associated discussion.
@pnkfelix pnkfelix added the postponed RFCs that have been postponed and may be revisited at a later time. label Oct 23, 2014
@blaenk
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blaenk commented Oct 24, 2014

This is great; the motivating example is very convincing.

@pnkfelix pnkfelix mentioned this issue Feb 16, 2015
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@petrochenkov petrochenkov added the T-lang Relevant to the language team, which will review and decide on the RFC. label Jan 19, 2018
@Centril Centril added A-macros Macro related proposals and issues A-syntax Syntax related proposals & ideas labels Nov 27, 2018
@pnkfelix
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The declarative macro repetition counts projects has taken ownership of this problem: rust-lang/lang-team#57 ; see their current work at #3086

@c410-f3r
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c410-f3r commented Mar 12, 2022 •
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This issue can probably be closed now

@kennytm
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kennytm commented Mar 13, 2022

closing as duplicate of #3086. see rust-lang/rust#83527 for the tracking issue.

@kennytm kennytm closed this as completed Mar 13, 2022
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A-macros Macro related proposals and issues A-syntax Syntax related proposals & ideas postponed RFCs that have been postponed and may be revisited at a later time. T-lang Relevant to the language team, which will review and decide on the RFC.
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@blaenk @kennytm @pnkfelix @Centril @petrochenkov @c410-f3r