ast: Compress AttrId from usize to u32
#70215
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Also stop encoding/decoding it entirely
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Rollup of 10 pull requests Successful merges: - rust-lang#70003 (symbol_names: treat ReifyShim like VtableShim.) - rust-lang#70051 (Allow `hir().find` to return `None`) - rust-lang#70126 (Fix ICE caused by truncating a negative ZST enum discriminant) - rust-lang#70197 (For issue 53957: revise unit test to focus on underlying bug of 23076.) - rust-lang#70215 (ast: Compress `AttrId` from `usize` to `u32`) - rust-lang#70218 (Fix deprecated Error.description() usage in docs) - rust-lang#70228 (Remove CARGO_BUILD_TARGET from bootstrap.py) - rust-lang#70231 (Add explanation message for E0224) - rust-lang#70232 (Tweak wording for std::io::Read::read function) - rust-lang#70238 (Add a test for out-of-line module passed through a proc macro) Failed merges: r? @ghost
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Should we have an |
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I don't know. |
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Apr 20, 2020
fix -Zast-json to output correct JSON form fixes rust-lang#71086 (Reverts some of the changes made in rust-lang#70215) JSON output (from an empty library) after fix has something for **"id"** field ```shell lonelyjoe@lonelyjoe-desktop:~/workspace/empty_lib/src$ rustc lib.rs -Zast-json ``` ```json { "module":{ "inner":{ "lo":0, "hi":94 }, "items":[ { "attrs":[ { "kind":{ "variant":"Normal", "fields":[ { "path":{ "span":{ "lo":0, "hi":0 }, "segments":[ { "ident":{ "name":"prelude_import", "span":{ "lo":0, "hi":0 } }, "id":3, "args":null } ] }, "args":"Empty" } ] }, "id":null, "style":"Outer", "span":{ "lo":0, "hi":0 } } ], "id":4, "span":{ "lo":0, "hi":0 }, "vis":{ "node":"Inherited", "span":{ "lo":0, "hi":0 } }, "ident":{ "name":"", "span":{ "lo":0, "hi":0 } }, "kind":{ "variant":"Use", "fields":[ { "prefix":{ "span":{ "lo":0, "hi":0 }, "segments":[ { "ident":{ "name":"{{root}}", "span":{ "lo":0, "hi":0 } }, "id":5, "args":null }, { "ident":{ "name":"std", "span":{ "lo":0, "hi":0 } }, "id":6, "args":null }, { "ident":{ "name":"prelude", "span":{ "lo":0, "hi":0 } }, "id":7, "args":null }, { "ident":{ "name":"v1", "span":{ "lo":0, "hi":0 } }, "id":8, "args":null } ] }, "kind":"Glob", "span":{ "lo":0, "hi":0 } } ] }, "tokens":null }, { "attrs":[ { "kind":{ "variant":"Normal", "fields":[ { "path":{ "span":{ "lo":0, "hi":0 }, "segments":[ { "ident":{ "name":"macro_use", "span":{ "lo":0, "hi":0 } }, "id":9, "args":null } ] }, "args":"Empty" } ] }, "id":null, "style":"Outer", "span":{ "lo":0, "hi":0 } } ], "id":10, "span":{ "lo":0, "hi":0 }, "vis":{ "node":"Inherited", "span":{ "lo":0, "hi":0 } }, "ident":{ "name":"std", "span":{ "lo":0, "hi":0 } }, "kind":{ "variant":"ExternCrate", "fields":[ null ] }, "tokens":null } ], "inline":true }, "attrs":[ ], "span":{ "lo":0, "hi":94 }, "proc_macros":[ ] } ```
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Apr 20, 2020
fix -Zast-json to output correct JSON form fixes rust-lang#71086 (Reverts some of the changes made in rust-lang#70215) JSON output (from an empty library) after fix has something for **"id"** field ```shell lonelyjoe@lonelyjoe-desktop:~/workspace/empty_lib/src$ rustc lib.rs -Zast-json ``` ```json { "module":{ "inner":{ "lo":0, "hi":94 }, "items":[ { "attrs":[ { "kind":{ "variant":"Normal", "fields":[ { "path":{ "span":{ "lo":0, "hi":0 }, "segments":[ { "ident":{ "name":"prelude_import", "span":{ "lo":0, "hi":0 } }, "id":3, "args":null } ] }, "args":"Empty" } ] }, "id":null, "style":"Outer", "span":{ "lo":0, "hi":0 } } ], "id":4, "span":{ "lo":0, "hi":0 }, "vis":{ "node":"Inherited", "span":{ "lo":0, "hi":0 } }, "ident":{ "name":"", "span":{ "lo":0, "hi":0 } }, "kind":{ "variant":"Use", "fields":[ { "prefix":{ "span":{ "lo":0, "hi":0 }, "segments":[ { "ident":{ "name":"{{root}}", "span":{ "lo":0, "hi":0 } }, "id":5, "args":null }, { "ident":{ "name":"std", "span":{ "lo":0, "hi":0 } }, "id":6, "args":null }, { "ident":{ "name":"prelude", "span":{ "lo":0, "hi":0 } }, "id":7, "args":null }, { "ident":{ "name":"v1", "span":{ "lo":0, "hi":0 } }, "id":8, "args":null } ] }, "kind":"Glob", "span":{ "lo":0, "hi":0 } } ] }, "tokens":null }, { "attrs":[ { "kind":{ "variant":"Normal", "fields":[ { "path":{ "span":{ "lo":0, "hi":0 }, "segments":[ { "ident":{ "name":"macro_use", "span":{ "lo":0, "hi":0 } }, "id":9, "args":null } ] }, "args":"Empty" } ] }, "id":null, "style":"Outer", "span":{ "lo":0, "hi":0 } } ], "id":10, "span":{ "lo":0, "hi":0 }, "vis":{ "node":"Inherited", "span":{ "lo":0, "hi":0 } }, "ident":{ "name":"std", "span":{ "lo":0, "hi":0 } }, "kind":{ "variant":"ExternCrate", "fields":[ null ] }, "tokens":null } ], "inline":true }, "attrs":[ ], "span":{ "lo":0, "hi":94 }, "proc_macros":[ ] } ```
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Apr 20, 2020
fix -Zast-json to output correct JSON form fixes rust-lang#71086 (Reverts some of the changes made in rust-lang#70215) JSON output (from an empty library) after fix has something for **"id"** field ```shell lonelyjoe@lonelyjoe-desktop:~/workspace/empty_lib/src$ rustc lib.rs -Zast-json ``` ```json { "module":{ "inner":{ "lo":0, "hi":94 }, "items":[ { "attrs":[ { "kind":{ "variant":"Normal", "fields":[ { "path":{ "span":{ "lo":0, "hi":0 }, "segments":[ { "ident":{ "name":"prelude_import", "span":{ "lo":0, "hi":0 } }, "id":3, "args":null } ] }, "args":"Empty" } ] }, "id":null, "style":"Outer", "span":{ "lo":0, "hi":0 } } ], "id":4, "span":{ "lo":0, "hi":0 }, "vis":{ "node":"Inherited", "span":{ "lo":0, "hi":0 } }, "ident":{ "name":"", "span":{ "lo":0, "hi":0 } }, "kind":{ "variant":"Use", "fields":[ { "prefix":{ "span":{ "lo":0, "hi":0 }, "segments":[ { "ident":{ "name":"{{root}}", "span":{ "lo":0, "hi":0 } }, "id":5, "args":null }, { "ident":{ "name":"std", "span":{ "lo":0, "hi":0 } }, "id":6, "args":null }, { "ident":{ "name":"prelude", "span":{ "lo":0, "hi":0 } }, "id":7, "args":null }, { "ident":{ "name":"v1", "span":{ "lo":0, "hi":0 } }, "id":8, "args":null } ] }, "kind":"Glob", "span":{ "lo":0, "hi":0 } } ] }, "tokens":null }, { "attrs":[ { "kind":{ "variant":"Normal", "fields":[ { "path":{ "span":{ "lo":0, "hi":0 }, "segments":[ { "ident":{ "name":"macro_use", "span":{ "lo":0, "hi":0 } }, "id":9, "args":null } ] }, "args":"Empty" } ] }, "id":null, "style":"Outer", "span":{ "lo":0, "hi":0 } } ], "id":10, "span":{ "lo":0, "hi":0 }, "vis":{ "node":"Inherited", "span":{ "lo":0, "hi":0 } }, "ident":{ "name":"std", "span":{ "lo":0, "hi":0 } }, "kind":{ "variant":"ExternCrate", "fields":[ null ] }, "tokens":null } ], "inline":true }, "attrs":[ ], "span":{ "lo":0, "hi":94 }, "proc_macros":[ ] } ```
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An easy size win for
ast::Attribute(96 bytes -> 88 bytes).Also stop encoding/decoding
AttrIdentirely.