[libcxx-commits] [PATCH] D108855: [libcxx] contiguous iterator concept: don't require pointer or complete element types
Joe Loser via Phabricator via libcxx-commits
libcxx-commits at lists.llvm.org
Sat Aug 28 20:40:07 PDT 2021
jloser updated this revision to Diff 369296.
jloser added a comment.
Swap pointer and reference types for `wrong_iter_reference_t` so its semantics match its name
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D108855/new/
https://reviews.llvm.org/D108855
Files:
libcxx/include/__iterator/concepts.h
libcxx/test/std/iterators/iterator.requirements/iterator.concepts/iterator.concept.random.access/contiguous_iterator.compile.pass.cpp
Index: libcxx/test/std/iterators/iterator.requirements/iterator.concepts/iterator.concept.random.access/contiguous_iterator.compile.pass.cpp
===================================================================
--- libcxx/test/std/iterators/iterator.requirements/iterator.concepts/iterator.concept.random.access/contiguous_iterator.compile.pass.cpp
+++ libcxx/test/std/iterators/iterator.requirements/iterator.concepts/iterator.concept.random.access/contiguous_iterator.compile.pass.cpp
@@ -101,9 +101,10 @@
struct wrong_iter_reference_t {
typedef std::contiguous_iterator_tag iterator_category;
typedef short value_type;
+ typedef short element_type;
typedef std::ptrdiff_t difference_type;
- typedef int* pointer;
- typedef short& reference;
+ typedef short* pointer;
+ typedef int& reference;
typedef wrong_iter_reference_t self;
wrong_iter_reference_t();
@@ -164,7 +165,6 @@
};
static_assert(std::random_access_iterator<no_element_type>);
-static_assert(!std::contiguous_iterator<no_element_type>);
struct to_address_wrong_return_type {
typedef std::contiguous_iterator_tag iterator_category;
Index: libcxx/include/__iterator/concepts.h
===================================================================
--- libcxx/include/__iterator/concepts.h
+++ libcxx/include/__iterator/concepts.h
@@ -171,7 +171,6 @@
derived_from<_ITER_CONCEPT<_Ip>, contiguous_iterator_tag> &&
is_lvalue_reference_v<iter_reference_t<_Ip>> &&
same_as<iter_value_t<_Ip>, remove_cvref_t<iter_reference_t<_Ip>>> &&
- (is_pointer_v<_Ip> || requires { sizeof(__pointer_traits_element_type<_Ip>); }) &&
requires(const _Ip& __i) {
{ _VSTD::to_address(__i) } -> same_as<add_pointer_t<iter_reference_t<_Ip>>>;
};
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