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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /src/test/ui/macros/nonterminal-matching.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/test/ui/macros/nonterminal-matching.rs')
-rw-r--r-- | src/test/ui/macros/nonterminal-matching.rs | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/src/test/ui/macros/nonterminal-matching.rs b/src/test/ui/macros/nonterminal-matching.rs new file mode 100644 index 000000000..84fffe44d --- /dev/null +++ b/src/test/ui/macros/nonterminal-matching.rs @@ -0,0 +1,26 @@ +// Check that we are refusing to match on complex nonterminals for which tokens are +// unavailable and we'd have to go through AST comparisons. + +#![feature(decl_macro)] + +macro simple_nonterminal($nt_ident: ident, $nt_lifetime: lifetime, $nt_tt: tt) { + macro n(a $nt_ident b $nt_lifetime c $nt_tt d) { + struct S; + } + + n!(a $nt_ident b $nt_lifetime c $nt_tt d); +} + +macro complex_nonterminal($nt_item: item) { + macro n(a $nt_item b) { + struct S; + } + + n!(a $nt_item b); //~ ERROR no rules expected the token `enum E {}` +} + +simple_nonterminal!(a, 'a, (x, y, z)); // OK + +complex_nonterminal!(enum E {}); + +fn main() {} |