1 // RUN: %clang_cc1 -std=c++2c -verify -fsyntax-only %s 2 3 template <unsigned N> 4 void decompose_array() { 5 int arr[4] = {1, 2, 3, 5}; 6 auto [x, ... // #1 7 rest, ...more_rest] = arr; // expected-error{{multiple packs in structured binding declaration}} 8 // expected-note@#1{{previous binding pack specified here}} 9 10 auto [y...] = arr; // expected-error{{'...' must immediately precede declared identifier}} 11 12 auto [...] = arr; // #2 13 // expected-error@#2{{expected identifier}} 14 // expected-error@#2{{{no names were provided}}} 15 // expected-warning@#2{{{does not allow a decomposition group to be empty}}} 16 auto [a, ..., b] = arr; // #3 17 // expected-error@#3{{expected identifier}} 18 // expected-error@#3{{{only 1 name was provided}}} 19 auto [a1, ...] = arr; // #4 20 // expected-error@#4{{expected identifier}} 21 // expected-error@#4{{{only 1 name was provided}}} 22 auto [..., b] = arr; // #5 23 // expected-error@#5{{expected identifier}} 24 // expected-error@#5{{{no names were provided}}} 25 } 26