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Add a va_arg intrinsic #1455

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mahkoh opened this issue Jan 9, 2016 · 3 comments
Closed

Add a va_arg intrinsic #1455

mahkoh opened this issue Jan 9, 2016 · 3 comments
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T-lang Relevant to the language team, which will review and decide on the RFC. T-libs-api Relevant to the library API team, which will review and decide on the RFC.

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@mahkoh
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mahkoh commented Jan 9, 2016 

fn va_arg<T>(va_list: *mut u8) -> T;

translates to

va_arg i8* va_list, T

This is useful for C interop. va_arg can theoretically be implemented in user code but that's a lot of work.
@mahkoh
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mahkoh commented Jan 9, 2016

It's not possible to implement this in user code without some kind of reflection/type information.

@nrc nrc added T-lang Relevant to the language team, which will review and decide on the RFC. T-libs-api Relevant to the library API team, which will review and decide on the RFC. labels Aug 18, 2016
@fstirlitz
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I believe #2137 addresses this.

@Centril
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Centril commented Oct 7, 2018

Closing in favor of rust-lang/rust#44930.

@Centril Centril closed this as completed Oct 7, 2018
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T-lang Relevant to the language team, which will review and decide on the RFC. T-libs-api Relevant to the library API team, which will review and decide on the RFC.
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