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Dylan-DPCDylan-DPC
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Rollup merge of rust-lang#71284 - JOE1994:serialize_id, r=petrochenkov
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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‎src/librustc_ast/ast.rs‎

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@@ -2211,14 +2211,14 @@ rustc_index::newtype_index! {
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}
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impl rustc_serialize::Encodable for AttrId {
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fn encode<S: Encoder>(&self, _: &mut S) -> Result<(), S::Error> {
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Ok(())
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fn encode<S: Encoder>(&self, s: &mut S) -> Result<(), S::Error> {
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s.emit_unit()
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}
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}
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impl rustc_serialize::Decodable for AttrId {
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fn decode<D: Decoder>(_: &mut D) -> Result<AttrId, D::Error> {
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Ok(crate::attr::mk_attr_id())
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fn decode<D: Decoder>(d: &mut D) -> Result<AttrId, D::Error> {
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d.read_nil().map(|_| crate::attr::mk_attr_id())
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}
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}
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‎src/test/ui/ast-json/ast-json-noexpand-output.rs‎

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// Check that AST json printing works.
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#![crate_type = "lib"]
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// check-pass
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// compile-flags: -Zast-json-noexpand
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// normalize-stdout-test ":\d+" -> ":0"
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// Only include a single item to reduce how often the test output needs
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// updating.
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extern crate core;

‎src/test/ui/ast-json/ast-json-noexpand-output.stdout‎

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{"module":{"inner":{"lo":0,"hi":0},"items":[{"attrs":[],"id":0,"span":{"lo":0,"hi":0},"vis":{"node":"Inherited","span":{"lo":0,"hi":0}},"ident":{"name":"core","span":{"lo":0,"hi":0}},"kind":{"variant":"ExternCrate","fields":[null]},"tokens":{"_field0":[[{"variant":"Token","fields":[{"kind":{"variant":"Ident","fields":["extern",false]},"span":{"lo":0,"hi":0}}]},"NonJoint"],[{"variant":"Token","fields":[{"kind":{"variant":"Ident","fields":["crate",false]},"span":{"lo":0,"hi":0}}]},"NonJoint"],[{"variant":"Token","fields":[{"kind":{"variant":"Ident","fields":["core",false]},"span":{"lo":0,"hi":0}}]},"NonJoint"],[{"variant":"Token","fields":[{"kind":"Semi","span":{"lo":0,"hi":0}}]},"NonJoint"]]}}],"inline":true},"attrs":[{"kind":{"variant":"Normal","fields":[{"path":{"span":{"lo":0,"hi":0},"segments":[{"ident":{"name":"crate_type","span":{"lo":0,"hi":0}},"id":0,"args":null}]},"args":{"variant":"Eq","fields":[{"lo":0,"hi":0},{"_field0":[[{"variant":"Token","fields":[{"kind":{"variant":"Literal","fields":[{"kind":"Str","symbol":"lib","suffix":null}]},"span":{"lo":0,"hi":0}}]},"NonJoint"]]}]}}]},"id":null,"style":"Inner","span":{"lo":0,"hi":0}}],"span":{"lo":0,"hi":0},"proc_macros":[]}

‎src/test/ui/ast-json/ast-json-output.rs‎

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// Check that AST json printing works.
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#![crate_type = "lib"]
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// check-pass
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// compile-flags: -Zast-json-noexpand
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// compile-flags: -Zast-json
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// normalize-stdout-test ":\d+" -> ":0"
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// Only include a single item to reduce how often the test output needs

‎src/test/ui/ast-json/ast-json-output.stdout‎

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{"module":{"inner":{"lo":0,"hi":0},"items":[{"attrs":[],"id":0,"span":{"lo":0,"hi":0},"vis":{"node":"Inherited","span":{"lo":0,"hi":0}},"ident":{"name":"core","span":{"lo":0,"hi":0}},"kind":{"variant":"ExternCrate","fields":[null]},"tokens":{"_field0":[[{"variant":"Token","fields":[{"kind":{"variant":"Ident","fields":["extern",false]},"span":{"lo":0,"hi":0}}]},"NonJoint"],[{"variant":"Token","fields":[{"kind":{"variant":"Ident","fields":["crate",false]},"span":{"lo":0,"hi":0}}]},"NonJoint"],[{"variant":"Token","fields":[{"kind":{"variant":"Ident","fields":["core",false]},"span":{"lo":0,"hi":0}}]},"NonJoint"],[{"variant":"Token","fields":[{"kind":"Semi","span":{"lo":0,"hi":0}}]},"NonJoint"]]}}],"inline":true},"attrs":[],"span":{"lo":0,"hi":0},"proc_macros":[]}
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{"module":{"inner":{"lo":0,"hi":0},"items":[{"attrs":[{"kind":{"variant":"Normal","fields":[{"path":{"span":{"lo":0,"hi":0},"segments":[{"ident":{"name":"prelude_import","span":{"lo":0,"hi":0}},"id":0,"args":null}]},"args":"Empty"}]},"id":null,"style":"Outer","span":{"lo":0,"hi":0}}],"id":0,"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":0,"args":null},{"ident":{"name":"std","span":{"lo":0,"hi":0}},"id":0,"args":null},{"ident":{"name":"prelude","span":{"lo":0,"hi":0}},"id":0,"args":null},{"ident":{"name":"v1","span":{"lo":0,"hi":0}},"id":0,"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":0,"args":null}]},"args":"Empty"}]},"id":null,"style":"Outer","span":{"lo":0,"hi":0}}],"id":0,"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},{"attrs":[],"id":0,"span":{"lo":0,"hi":0},"vis":{"node":"Inherited","span":{"lo":0,"hi":0}},"ident":{"name":"core","span":{"lo":0,"hi":0}},"kind":{"variant":"ExternCrate","fields":[null]},"tokens":{"_field0":[[{"variant":"Token","fields":[{"kind":{"variant":"Ident","fields":["extern",false]},"span":{"lo":0,"hi":0}}]},"NonJoint"],[{"variant":"Token","fields":[{"kind":{"variant":"Ident","fields":["crate",false]},"span":{"lo":0,"hi":0}}]},"NonJoint"],[{"variant":"Token","fields":[{"kind":{"variant":"Ident","fields":["core",false]},"span":{"lo":0,"hi":0}}]},"NonJoint"],[{"variant":"Token","fields":[{"kind":"Semi","span":{"lo":0,"hi":0}}]},"NonJoint"]]}}],"inline":true},"attrs":[{"kind":{"variant":"Normal","fields":[{"path":{"span":{"lo":0,"hi":0},"segments":[{"ident":{"name":"crate_type","span":{"lo":0,"hi":0}},"id":0,"args":null}]},"args":{"variant":"Eq","fields":[{"lo":0,"hi":0},{"_field0":[[{"variant":"Token","fields":[{"kind":{"variant":"Literal","fields":[{"kind":"Str","symbol":"lib","suffix":null}]},"span":{"lo":0,"hi":0}}]},"NonJoint"]]}]}}]},"id":null,"style":"Inner","span":{"lo":0,"hi":0}}],"span":{"lo":0,"hi":0},"proc_macros":[]}

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