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[Support] Implement llvm::Registry::iterator via llvm_iterator_facade

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Summary:
Among other things, this allows using STL algorithms like 'find_if' over
llvm::Registry.

Reviewers: sammccall

Reviewed By: sammccall

Subscribers: kristina, llvm-commits

Differential Revision: https://reviews.llvm.org/D56854

llvm-svn: 351566
This commit is contained in:
Ilya Biryukov 2019-01-18 17:30:49 +00:00
parent 2716e86e57
commit 59899accb7
1 changed files with 3 additions and 3 deletions
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6
include/llvm/Support/Registry.h
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@ -81,17 +81,17 @@ namespace llvm {
/// Iterators for registry entries.
///
class iterator {
class iterator
: public llvm::iterator_facade_base<iterator, std::forward_iterator_tag,
const entry> {
const node *Cur;
public:
explicit iterator(const node *N) : Cur(N) {}
bool operator==(const iterator &That) const { return Cur == That.Cur; }
bool operator!=(const iterator &That) const { return Cur != That.Cur; }
iterator &operator++() { Cur = Cur->Next; return *this; }
const entry &operator*() const { return Cur->Val; }
const entry *operator->() const { return &Cur->Val; }
};
// begin is not defined here in order to avoid usage of an undefined static