df4b23e721
When 2 or more sequences share the same span, we can't use the precomputed map for their first set. So we compute it recursively. Fixes #62831.
23 lines
830 B
Rust
23 lines
830 B
Rust
// aux-build:proc_macro_sequence.rs
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// Regression test for issue #62831: Check that multiple sequences with the same span in the
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// left-hand side of a macro definition behave as if they had unique spans, and in particular that
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// they don't crash the compiler.
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#![feature(proc_macro_hygiene)]
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#![allow(unused_macros)]
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extern crate proc_macro_sequence;
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// When ignoring spans, this macro has the same macro definition as `generated_foo` in
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// `proc_macro_sequence.rs`.
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macro_rules! manual_foo {
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(1 $x:expr $($y:tt,)* //~ERROR `$x:expr` may be followed by `$y:tt`
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$(= $z:tt)* //~ERROR `$x:expr` may be followed by `=`
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) => {};
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}
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proc_macro_sequence::make_foo!(); //~ERROR `$x:expr` may be followed by `$y:tt`
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//~^ERROR `$x:expr` may be followed by `=`
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fn main() {}
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