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macros: Improve tt matchers #34908

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merged 2 commits into from
Jul 28, 2016
Merged

macros: Improve tt matchers #34908

merged 2 commits into from
Jul 28, 2016

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jseyfried
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Fixes #5846, fixes #22819.
r? @nrc

This was referenced Jul 18, 2016
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jseyfried commented Jul 19, 2016 •
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Looks like this breaks some non-trivial macro-expanded macro_rules!, which I thought were already broken but actually happen to work in some cases due to the strange behavior of today's tt fragments.

This should be able to land without breakage once I fix non-trivial macro-expanded macro_rules! (EDIT: c.f. #34925).

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cc @eddyb

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eddyb commented Jul 19, 2016

LGTM, pending on #34925 landing.

@jseyfried jseyfried force-pushed the improve_tt_matchers branch 2 times, most recently from ddf7ae9 to 082970c Compare July 25, 2016 18:03
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This is ready to land now pending review (cc @nrc).
The travis failure is spurious.

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nrc commented Jul 26, 2016

@bors: r+

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bors commented Jul 26, 2016

📌 Commit 082970c has been approved by nrc

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bors commented Jul 26, 2016

⌛ Testing commit 082970c with merge ee0dc3a...

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bors commented Jul 26, 2016

💔 Test failed - auto-win-msvc-64-opt

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eddyb commented Jul 26, 2016

@bors retry

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bors commented Jul 26, 2016

⌛ Testing commit 082970c with merge bb5f00b...

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bors commented Jul 26, 2016

💔 Test failed - auto-win-msvc-64-opt-rustbuild

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@bors: retry

On Tue, Jul 26, 2016 at 3:24 AM, bors notifications@github.com wrote:

💔 Test failed - auto-win-msvc-64-opt-rustbuild
https://buildbot.rust-lang.org/builders/auto-win-msvc-64-opt-rustbuild/builds/1950

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bors commented Jul 28, 2016

⌛ Testing commit 082970c with merge d69a893...

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bors commented Jul 28, 2016

💔 Test failed - auto-win-gnu-32-opt-rustbuild

@jseyfried jseyfried force-pushed the improve_tt_matchers branch from 082970c to 4485502 Compare July 28, 2016 02:16
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@bors r=nrc

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bors commented Jul 28, 2016

📌 Commit 4485502 has been approved by nrc

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bors commented Jul 28, 2016

⌛ Testing commit 4485502 with merge 4e0fcad...

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@bors: retry force clean

  • restarted buildbot

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bors commented Jul 28, 2016

⌛ Testing commit 4485502 with merge 1895bf7...

bors added a commit that referenced this pull request Jul 28, 2016
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Auto merge of #34908 - jseyfried:improve_tt_matchers, r=nrc
1895bf7 
macros: Improve `tt` matchers

Fixes #5846, fixes #22819.
r? @nrc
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bors commented Jul 28, 2016

☀️ Test successful - auto-linux-32-nopt-t, auto-linux-32-opt, auto-linux-64-cargotest, auto-linux-64-cross-freebsd, auto-linux-64-debug-opt, auto-linux-64-nopt-t, auto-linux-64-opt, auto-linux-64-opt-mir, auto-linux-64-opt-rustbuild, auto-linux-64-x-android-t, auto-linux-cross-opt, auto-linux-musl-64-opt, auto-mac-32-opt, auto-mac-64-opt, auto-mac-64-opt-rustbuild, auto-mac-cross-ios-opt, auto-win-gnu-32-opt, auto-win-gnu-32-opt-rustbuild, auto-win-gnu-64-opt, auto-win-msvc-32-opt, auto-win-msvc-64-cargotest, auto-win-msvc-64-opt, auto-win-msvc-64-opt-mir, auto-win-msvc-64-opt-rustbuild
Approved by: nrc
Pushing 1895bf7 to master...

@bors bors merged commit 4485502 into rust-lang:master Jul 28, 2016
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durka commented Aug 3, 2016 •
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Has this innocuously named PR finally killed the reparse hack? https://is.gd/tV0iba

macro_rules! as_item { ($i:item) => { $i } }

macro_rules! foo {
    ($x:tt) => {
        //as_item!{          // uncomment for stable
        struct Item($x);
        //}
    }
}

foo!(i32);

fn main() {}

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eddyb commented Aug 3, 2016

@durka That's what was fixed here, yeah.

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durka commented Aug 3, 2016

That makes me unjustifiably happy. Please tag this with relnotes, trumpet from rooftops, etc.

@nrc nrc added the relnotes Marks issues that should be documented in the release notes of the next release. label Aug 3, 2016
@jseyfried jseyfried mentioned this pull request Aug 4, 2016
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@durka durka mentioned this pull request Aug 17, 2016
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@jseyfried jseyfried deleted the improve_tt_matchers branch October 16, 2016 09:30
@jseyfried jseyfried mentioned this pull request Nov 3, 2016
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@hcpl hcpl mentioned this pull request Dec 22, 2018
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hcpl added a commit to hcpl/if_chain that referenced this pull request Jan 27, 2019
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Bump minimum Rust to 1.12.0
97c59e3 
Rust 1.11 had an old behaviour for `tt` matchers that has been fixed in
Rust 1.12 (rust-lang/rust#34908).
@jplatte jplatte mentioned this pull request Feb 10, 2020
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Traverse interpolated TTs so we can parse them as other things tt-macro doesn't work
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@jseyfried @eddyb @nrc @bors @alexcrichton @durka