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Implement RFC495 semantics for slice patterns #32202

Merged
merged 15 commits into from
Jun 9, 2016
Merged

Implement RFC495 semantics for slice patterns #32202

merged 15 commits into from
Jun 9, 2016

Commits on Jun 7, 2016

  1. mir: distinguish between variable visibility scopes and SEME scopes.

    @eddyb
    eddyb committed Jun 7, 2016
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  2. mir: group span visibility scope under a new SourceInfo type.

    @eddyb
    eddyb committed Jun 7, 2016
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Commits on Jun 8, 2016

  1. remove the librustc_trans -> librustc_mir dependency

    @arielb1
    arielb1 committed Jun 8, 2016
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  2. fix translation of unsized types and arrays

    @arielb1
    arielb1 committed Jun 8, 2016
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  3. implement RFC495 semantics for slice patterns 

    non-MIR translation is still not supported for these and will happily ICE.

This is a [breaking-change] for many uses of slice_patterns.
    @arielb1
    arielb1 committed Jun 8, 2016
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  4. wrap calls to lvalue_ty

    @arielb1
    arielb1 committed Jun 8, 2016
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  5. handle string literals correctly in match checking 

    The root of the problem is that a string literal pattern is essentially of
the form `&LITERAL`, in a single block, while match checking wants to
split that.

To fix that, I added a type field to the patterns in match checking,
which allows us to distinguish between a full and split pattern.

That file is ugly and needs to be cleaned. However, `trans::_match` calls
it, so I think we should delay the cleanup until we kill that.

Fixes rust-lang#30240
    @arielb1
    arielb1 committed Jun 8, 2016
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  6. address review comments

    @arielb1
    arielb1 committed Jun 8, 2016
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  7. fix damage in librustc

    @arielb1
    arielb1 committed Jun 8, 2016
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  8. fix stdtest

    @arielb1
    arielb1 committed Jun 8, 2016
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  9. fix tests

    @arielb1
    arielb1 committed Jun 8, 2016
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  10. add an help message when using an old-style slice pattern

    @arielb1
    arielb1 committed Jun 8, 2016
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  11. remove residual slice pattern junk from mem_categorization

    @arielb1
    arielb1 committed Jun 8, 2016
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  12. use the slice_pat hack in libstd too

    @arielb1
    arielb1 committed Jun 8, 2016
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  13. fix Cargo.lock

    @arielb1
    arielb1 committed Jun 8, 2016
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