// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// This is a "No Compile Test" suite.
// http://dev.chromium.org/developers/testing/no-compile-tests
#include "base/containers/checked_iterators.h"
namespace base {
constexpr int kArray1[] = {1, 2, 3, 4, 5};
constexpr int kArray2[] = {1, 2, 3, 4, 5};
constexpr auto GetBeginIter() {
return CheckedContiguousIterator<const int>(kArray1, kArray1 + 5);
}
constexpr auto GetEndIter() {
return CheckedContiguousIterator<const int>(kArray1, kArray1 + 5,
kArray1 + 5);
}
void ConstructorOrdering() {
// Start can't be larger than end.
constexpr CheckedContiguousIterator<const int> iter1(kArray1 + 1, kArray1); // expected-error {{constexpr variable 'iter1' must be initialized by a constant expression}}
// Current can't be larger than start.
constexpr CheckedContiguousIterator<const int> iter2(kArray1 + 1, kArray1, // expected-error {{constexpr variable 'iter2' must be initialized by a constant expression}}
kArray1 + 5);
// Current can't be larger than end.
constexpr CheckedContiguousIterator<const int> iter3(kArray1, kArray1 + 2, // expected-error {{constexpr variable 'iter3' must be initialized by a constant expression}}
kArray1 + 1);
}
void CompareItersFromDifferentContainers() {
// Can't compare iterators into different containers.
constexpr auto iter1 = GetBeginIter();
constexpr CheckedContiguousIterator<const int> iter2(kArray2, kArray2 + 5);
constexpr bool equal = iter1 == iter2; // expected-error {{constexpr variable 'equal' must be initialized by a constant expression}}
constexpr bool not_equal = iter1 != iter2; // expected-error {{constexpr variable 'not_equal' must be initialized by a constant expression}}
constexpr bool less_than = iter1 < iter2; // expected-error {{constexpr variable 'less_than' must be initialized by a constant expression}}
constexpr bool less_equal = iter1 <= iter2; // expected-error {{constexpr variable 'less_equal' must be initialized by a constant expression}}
constexpr bool greater_than = iter1 > iter2; // expected-error {{constexpr variable 'greater_than' must be initialized by a constant expression}}
constexpr bool greater_equal = iter1 >= iter2; // expected-error {{constexpr variable 'greater_equal' must be initialized by a constant expression}}
constexpr auto difference = iter1 - iter2; // expected-error {{constexpr variable 'difference' must be initialized by a constant expression}}
}
void DecrementBegin() {
constexpr auto past_begin1 = --GetBeginIter(); // expected-error {{constexpr variable 'past_begin1' must be initialized by a constant expression}}
constexpr auto past_begin2 = GetBeginIter()--; // expected-error {{constexpr variable 'past_begin2' must be initialized by a constant expression}}
constexpr auto past_begin3 = (GetBeginIter() += -1); // expected-error {{constexpr variable 'past_begin3' must be initialized by a constant expression}}
constexpr auto past_begin4 = GetBeginIter() + -1; // expected-error {{constexpr variable 'past_begin4' must be initialized by a constant expression}}
constexpr auto past_begin5 = (GetBeginIter() -= 1); // expected-error {{constexpr variable 'past_begin5' must be initialized by a constant expression}}
constexpr auto past_begin6 = GetBeginIter() - 1; // expected-error {{constexpr variable 'past_begin6' must be initialized by a constant expression}}
}
void IncrementBeginPastEnd() {
constexpr auto past_end1 = (GetBeginIter() += 6); // expected-error {{constexpr variable 'past_end1' must be initialized by a constant expression}}
constexpr auto past_end2 = GetBeginIter() + 6; // expected-error {{constexpr variable 'past_end2' must be initialized by a constant expression}}
constexpr auto past_end3 = (GetBeginIter() -= -6); // expected-error {{constexpr variable 'past_end3' must be initialized by a constant expression}}
constexpr auto past_end4 = GetBeginIter() - -6; // expected-error {{constexpr variable 'past_end4' must be initialized by a constant expression}}
}
void IncrementEnd() {
constexpr auto past_end1 = ++GetEndIter(); // expected-error {{constexpr variable 'past_end1' must be initialized by a constant expression}}
constexpr auto past_end2 = GetEndIter()++; // expected-error {{constexpr variable 'past_end2' must be initialized by a constant expression}}
constexpr auto past_end3 = (GetEndIter() += 1); // expected-error {{constexpr variable 'past_end3' must be initialized by a constant expression}}
constexpr auto past_end4 = GetEndIter() + 1; // expected-error {{constexpr variable 'past_end4' must be initialized by a constant expression}}
constexpr auto past_end5 = (GetEndIter() -= -1); // expected-error {{constexpr variable 'past_end5' must be initialized by a constant expression}}
constexpr auto past_end6 = GetEndIter() - -1; // expected-error {{constexpr variable 'past_end6' must be initialized by a constant expression}}
}
void DecrementEndPastBegin() {
constexpr auto past_begin1 = (GetEndIter() += -6); // expected-error {{constexpr variable 'past_begin1' must be initialized by a constant expression}}
constexpr auto past_begin2 = GetEndIter() + -6; // expected-error {{constexpr variable 'past_begin2' must be initialized by a constant expression}}
constexpr auto past_begin3 = (GetEndIter() -= 6); // expected-error {{constexpr variable 'past_begin3' must be initialized by a constant expression}}
constexpr auto past_begin4 = GetEndIter() - 6; // expected-error {{constexpr variable 'past_begin4' must be initialized by a constant expression}}
}
void DerefBegin() {
// Can't use a negative index in operator[].
constexpr auto& ref1 = GetBeginIter()[-1]; // expected-error {{constexpr variable 'ref1' must be initialized by a constant expression}}
// Can't use a operator[] to deref the end.
constexpr auto& ref2 = GetBeginIter()[5]; // expected-error {{constexpr variable 'ref2' must be initialized by a constant expression}}
}
void DerefEnd() {
// Can't dereference the end iterator.
constexpr auto& ref1 = *GetEndIter(); // expected-error {{constexpr variable 'ref1' must be initialized by a constant expression}}
constexpr auto* ptr = GetEndIter().operator->(); // expected-error {{constexpr variable 'ptr' must be initialized by a constant expression}}
constexpr auto& ref2 = GetEndIter()[0]; // expected-error {{constexpr variable 'ref2' must be initialized by a constant expression}}
}
} // namespace base
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