Remove normalization of `Span` debug output in proc-macro tests
Fixes #74800
The definition of `is_x86_feature_detected!` (and similar macros)
depends on the platform - it is produced by a `cfg_if!` invocation on
x86, and a plain `#[cfg]` on other platforms. Since it is part of the
prelude, we will end up importing different hygiene information
depending on the platform. This previously required us to avoid printing raw
`SyntaxContext` ids in any tests that uses the standard library, since
the captured output will be platform-dependent.
Previously, we replaced all `SyntaxContext` ids with "#CTXT", and the
raw `Span` lo/hi bytes with "LO..HI".
This commit adds `#![no_std]` and `extern crate std` to all proc-macro
tests that print spans. This suppresses the prelude import, while
still using lang items from `std` (which gives us a buildable binary).
With this apporach, we will only load hygiene information for things
which we explicitly import. This lets us re-add
`-Z unpretty=expanded,hygiene`, since its output can now be made stable
across all platforms.
Additionally, we use `-Z span-debug` in more places, which lets us avoid
the "LO..HI" normalization hack.
2020-08-09 12:36:31 -05:00
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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:23:37: 23:43 (#3) }, Punct { ch: ':', spacing: Joint, span: $DIR/meta-macro-hygiene.rs:23:43: 23:45 (#3) }, Punct { ch: ':', spacing: Alone, span: $DIR/meta-macro-hygiene.rs:23:43: 23:45 (#3) }, Ident { ident: "dummy", span: $DIR/meta-macro-hygiene.rs:23:45: 23:50 (#3) }, Punct { ch: '!', spacing: Alone, span: $DIR/meta-macro-hygiene.rs:23:50: 23:51 (#3) }, Group { delimiter: Parenthesis, stream: TokenStream [], span: $DIR/meta-macro-hygiene.rs:23:51: 23:53 (#3) }]
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Respanned: TokenStream [Ident { ident: "$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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// 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
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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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