35 lines · cpp
1// RUN: %clang_cc1 %s -std=c++20 -fsyntax-only -verify2 3template <int N> struct Str {4 constexpr Str(char const (&s)[N]) { __builtin_memcpy(value, s, N); }5 char value[N];6};7 8template <Str V> class ASCII {};9 10void Foo(ASCII<"this nontype template argument is too long to print">); // expected-note {{no known conversion from 'ASCII<Str<43>{"this nontype template argument is too long"}>' to 'ASCII<Str<52>{"this nontype template argument is too long to print"}>'}}11void Bar(ASCII<"this nttp argument is too short">); // expected-note {{no known conversion from 'ASCII<Str<14>{{119, 97, 105, 116, 32, 97, 32, 115, 27, 99, 111, 110, 100, 0}}>' to 'ASCII<Str<32>{"this nttp argument is too short"}>'}}12void Meow(ASCII<"what|">); // expected-note {{no known conversion from 'ASCII<Str<8>{"what??!"}>' to 'ASCII<Str<6>{"what|"}>' for 1st argument}}13 14void test_ascii() {15 ASCII<"this nontype template argument"16 " is too long">17 a;18 Foo(a); // expected-error {{no matching function}}19 decltype(a)::display(); // expected-error {{no member named 'display' in 'ASCII<Str<43>{"this nontype template argument is [...]"}>'}}20}21 22void test_non_ascii() {23 ASCII<"wait a s\033cond"> a;24 Bar(a); // expected-error {{no matching function}}25 decltype(a)::display(); // expected-error {{no member named 'display' in 'ASCII<Str<14>{{119, 97, 105, 116, 32, 97, 32, 115, 27, 99, ...}}>'}}26}27 28// The dialects (C++20 and above) that accept string literals as non-type29// template arguments do not support trigraphs.30void test_trigraph() {31 ASCII<"what??!"> a; // expected-warning {{trigraph ignored}}32 Meow(a); // expected-error {{no matching function}}33 decltype(a)::display(); // expected-error {{no member named 'display' in 'ASCII<Str<8>{"what??!"}>'}}34}35