From 218caa410aa38c29984be31a5229b9fa717560ee Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 14:19:13 +0200 Subject: Merging upstream version 1.68.2+dfsg1. Signed-off-by: Daniel Baumann --- tests/ui/macros/nonterminal-matching.rs | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 tests/ui/macros/nonterminal-matching.rs (limited to 'tests/ui/macros/nonterminal-matching.rs') diff --git a/tests/ui/macros/nonterminal-matching.rs b/tests/ui/macros/nonterminal-matching.rs new file mode 100644 index 000000000..84fffe44d --- /dev/null +++ b/tests/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() {} -- cgit v1.2.3