07e7823c01
If a symbol name can only be imported from one place for a type, and as long as it was not glob-imported anywhere in the current crate, we can trim its printed path and print only the name. This has wide implications on error messages with types, for example, shortening `std::vec::Vec` to just `Vec`, as long as there is no other `Vec` importable anywhere. This adds a new '-Z trim-diagnostic-paths=false' option to control this feature. On the good path, with no diagnosis printed, we should try to avoid issuing this query, so we need to prevent trimmed_def_paths query on several cases. This change also relies on a previous commit that differentiates between `Debug` and `Display` on various rustc types, where the latter is trimmed and presented to the user and the former is not.
65 lines
3.3 KiB
Plaintext
65 lines
3.3 KiB
Plaintext
Def site: $DIR/auxiliary/make-macro.rs:7:9: 16:10 (#4)
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Input: TokenStream [Ident { ident: "$crate", span: $DIR/meta-macro-hygiene.rs:24:37: 24:43 (#3) }, Punct { ch: ':', spacing: Joint, span: $DIR/meta-macro-hygiene.rs:24:43: 24:45 (#3) }, Punct { ch: ':', spacing: Alone, span: $DIR/meta-macro-hygiene.rs:24:43: 24:45 (#3) }, Ident { ident: "dummy", span: $DIR/meta-macro-hygiene.rs:24:45: 24:50 (#3) }, Punct { ch: '!', spacing: Alone, span: $DIR/meta-macro-hygiene.rs:24:50: 24:51 (#3) }, Group { delimiter: Parenthesis, stream: TokenStream [], span: $DIR/meta-macro-hygiene.rs:24:51: 24:53 (#3) }]
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Respanned: TokenStream [Ident { ident: "$crate", span: $DIR/auxiliary/make-macro.rs:7:9: 16:10 (#4) }, Punct { ch: ':', spacing: Joint, span: $DIR/auxiliary/make-macro.rs:7:9: 16:10 (#4) }, Punct { ch: ':', spacing: Alone, span: $DIR/auxiliary/make-macro.rs:7:9: 16:10 (#4) }, Ident { ident: "dummy", span: $DIR/auxiliary/make-macro.rs:7:9: 16:10 (#4) }, Punct { ch: '!', spacing: Alone, span: $DIR/auxiliary/make-macro.rs:7:9: 16:10 (#4) }, Group { delimiter: Parenthesis, stream: TokenStream [], span: $DIR/auxiliary/make-macro.rs:7:9: 16:10 (#4) }]
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#![feature /* 0#0 */(prelude_import)]
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// ignore-tidy-linelength
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// aux-build:make-macro.rs
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// aux-build:meta-macro.rs
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// edition:2018
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// compile-flags: -Z span-debug -Z macro-backtrace -Z unpretty=expanded,hygiene -Z trim-diagnostic-paths=no
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// check-pass
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// normalize-stdout-test "\d+#" -> "0#"
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//
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// We don't care about symbol ids, so we set them all to 0
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// in the stdout
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#![no_std /* 0#0 */]
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#[prelude_import /* 0#1 */]
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use core /* 0#1 */::prelude /* 0#1 */::v1 /* 0#1 */::*;
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#[macro_use /* 0#1 */]
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extern crate core /* 0#1 */;
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#[macro_use /* 0#1 */]
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extern crate compiler_builtins /* 0#1 */;
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// Don't load unnecessary hygiene information from std
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extern crate std /* 0#0 */;
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extern crate meta_macro /* 0#0 */;
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macro_rules! produce_it
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/*
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0#0
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*/ {
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() =>
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{
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meta_macro :: print_def_site ! ($ crate :: dummy ! ()) ;
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// `print_def_site!` will respan the `$crate` identifier
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// with `Span::def_site()`. This should cause it to resolve
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// relative to `meta_macro`, *not* `make_macro` (despite
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// the fact that that `print_def_site` is produced by
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// a `macro_rules!` macro in `make_macro`).
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}
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}
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fn main /* 0#0 */() { }
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/*
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Expansions:
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0: parent: ExpnId(0), call_site_ctxt: #0, def_site_ctxt: #0, kind: Root
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1: parent: ExpnId(0), call_site_ctxt: #0, def_site_ctxt: #0, kind: AstPass(StdImports)
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2: parent: ExpnId(0), call_site_ctxt: #0, def_site_ctxt: #0, kind: Macro(Bang, "produce_it")
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3: parent: ExpnId(2), call_site_ctxt: #3, def_site_ctxt: #0, kind: Macro(Bang, "meta_macro::print_def_site")
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4: parent: ExpnId(3), call_site_ctxt: #4, def_site_ctxt: #0, kind: Macro(Bang, "$crate::dummy")
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SyntaxContexts:
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#0: parent: #0, outer_mark: (ExpnId(0), Opaque)
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#1: parent: #0, outer_mark: (ExpnId(1), Opaque)
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#2: parent: #0, outer_mark: (ExpnId(1), Transparent)
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#3: parent: #0, outer_mark: (ExpnId(2), SemiTransparent)
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#4: parent: #0, outer_mark: (ExpnId(3), Opaque)
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#5: parent: #3, outer_mark: (ExpnId(3), Transparent)
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#6: parent: #0, outer_mark: (ExpnId(3), SemiTransparent)
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#7: parent: #0, outer_mark: (ExpnId(4), Opaque)
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#8: parent: #4, outer_mark: (ExpnId(4), Transparent)
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#9: parent: #4, outer_mark: (ExpnId(4), SemiTransparent)
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*/
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