db6b3c1ce4
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.
29 lines
521 B
Rust
29 lines
521 B
Rust
// Check what token streams proc macros see when interpolated tokens are passed to them as input.
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// check-pass
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// edition:2018
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// aux-build:test-macros.rs
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#![no_std] // Don't load unnecessary hygiene information from std
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extern crate std;
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#[macro_use]
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extern crate test_macros;
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macro_rules! pass_ident {
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($i:ident) => {
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fn f() {
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print_bang!($i);
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}
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#[print_attr]
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const $i: u8 = 0;
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#[derive(Print)]
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struct $i {}
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};
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}
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pass_ident!(A);
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fn main() {}
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