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Add a io::Writer wrapper that supports pushback #856

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steveklabnik opened this issue Feb 15, 2015 · 0 comments
Open

Add a io::Writer wrapper that supports pushback #856

steveklabnik opened this issue Feb 15, 2015 · 0 comments
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T-libs-api Relevant to the library API team, which will review and decide on the RFC.

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Issue by erickt
Saturday Nov 24, 2012 at 20:17 GMT

For earlier discussion, see rust-lang/rust#4031

This issue was labelled with: A-libs, P-low in the Rust repository

C's stdio has a function ungetc that lets you push back a single char on a stream. While we could expose support for the c functions, this wouldn't help with our str/bytes writers. Instead, how about we make a trait/impl io::Writer wrapper that supports lookahead and pushback for any io::Writers?
@steveklabnik steveklabnik mentioned this issue Feb 15, 2015
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@petrochenkov petrochenkov added T-libs-api Relevant to the library API team, which will review and decide on the RFC. and removed A-libs labels Jan 28, 2018
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