1// Copyright 2024 The Chromium Authors 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5// This is a "No Compile Test" suite. 6// http://dev.chromium.org/developers/testing/no-compile-tests 7 8#include "base/strings/cstring_view.h" 9 10namespace base { 11namespace { 12 13void WontCompileTypeMismatch() { 14 cstring_view(u"123"); // expected-error {{no matching conversion}} 15 cstring_view(U"123"); // expected-error {{no matching conversion}} 16 u16cstring_view("123"); // expected-error {{no matching conversion}} 17 u16cstring_view(U"123"); // expected-error {{no matching conversion}} 18 u32cstring_view("123"); // expected-error {{no matching conversion}} 19 u32cstring_view(u"123"); // expected-error {{no matching conversion}} 20 21#if BUILDFLAG(IS_WIN) 22 cstring_view(L""); // expected-error {{no matching conversion}} 23 u16cstring_view(L""); // expected-error {{no matching conversion}} 24 u32cstring_view(L""); // expected-error {{no matching conversion}} 25 wcstring_view(""); // expected-error {{no matching conversion}} 26 wcstring_view(u""); // expected-error {{no matching conversion}} 27 wcstring_view(U""); // expected-error {{no matching conversion}} 28#endif 29} 30 31void WontCompileNoNulInArray() { 32 const char abc_good[] = {'a', 'b', 'c', '\0'}; 33 auto v1 = cstring_view(abc_good); // No error, NUL exists. 34 35#if defined(__clang__) 36 const char abc_bad[] = {'a', 'b', 'c'}; 37 const char after = 'd'; 38 auto v2 = cstring_view(abc_bad); // expected-error {{no matching conversion}} 39#endif 40} 41 42void WontCompilePointerInsteadOfArray() { 43 const char good[] = "abc"; 44 const char* bad = good; 45 auto v = cstring_view(bad); // expected-error {{no matching conversion}} 46 auto v2 = cstring_view(nullptr); // expected-error {{no matching conversion}} 47} 48 49void WontCompileCompareTypeMismatch() { 50 // TODO(crbug.com/330213589): This should be testable with a static_assert on 51 // a concept. 52 (void)(cstring_view() == u16cstring_view()); // expected-error {{invalid operands to binary expression}} 53 (void)(cstring_view() <=> u16cstring_view()); // expected-error {{invalid operands to binary expression}} 54} 55 56void WontCompileSwapTypeMismatch() { 57 auto a = cstring_view("8"); 58 auto b = u16cstring_view(u"16"); 59 a.swap(b); // expected-error {{cannot bind to a value of unrelated type}} 60} 61 62void WontCompileStartsEndWithMismatch() { 63 u16cstring_view(u"abc").starts_with("ab"); // expected-error {{no matching member function}} 64 u16cstring_view(u"abc").ends_with("ab"); // expected-error {{no matching member function}} 65} 66 67void WontCompileDanglingInput() { 68 // TODO: construct from string. 69 // auto v1 = cstring_view(std::string("abc")); 70 71 auto v2 = UNSAFE_BUFFERS(cstring_view( 72 std::vector<char>{'a', 'b', 'c', '\0'}.data(), 73 3u)); // This should make a lifetime error but doesn't. :( 74 75 auto v3 = cstring_view(); 76 { 77 std::vector<char> abc = {'a', 'b', 'c', '\0'}; 78 v3 = UNSAFE_BUFFERS(cstring_view( 79 abc.data(), 3u)); // This should make a lifetime error but doesn't. :( 80 } 81} 82 83} // namespace 84} // namespace base 85