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Add operator- to Path's reverse_iterator. Needed for D19666

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Reviewers: rafael, craig.topper, bogner

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D19724

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@268062 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Filipe Cabecinhas 2016-04-29 16:48:07 +00:00
parent 6881bc84c4
commit 034b92a7c3
2 changed files with 7 additions and 0 deletions
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3
include/llvm/Support/Path.h
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@ -87,6 +87,9 @@ public:
reverse_iterator &operator++(); // preincrement
bool operator==(const reverse_iterator &RHS) const;
bool operator!=(const reverse_iterator &RHS) const { return !(*this == RHS); }
/// @brief Difference in bytes between this and RHS.
ptrdiff_t operator-(const reverse_iterator &RHS) const;
};
/// @brief Get begin iterator over \a path.

4
lib/Support/Path.cpp
View File

@ -353,6 +353,10 @@ bool reverse_iterator::operator==(const reverse_iterator &RHS) const {
Position == RHS.Position;
}
ptrdiff_t reverse_iterator::operator-(const reverse_iterator &RHS) const {
return Position - RHS.Position;
}
StringRef root_path(StringRef path) {
const_iterator b = begin(path),
pos = b,