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// 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() {}
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