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author | Abseil Team <absl-team@google.com> | 2020-03-05T16·37-0800 |
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committer | Derek Mauro <dmauro@google.com> | 2020-03-05T20·52+0000 |
commit | cf3a1998e9d41709d4141e2f13375993cba1130e (patch) | |
tree | 9574720f5b23f1842a3e884fe79210508c8c6f39 /absl/types/span.h | |
parent | b19ba96766db08b1f32605cb4424a0e7ea0c7584 (diff) |
Export of internal Abseil changes
-- 44ccc0320ffaa2106ba3c6393b5a40c3b4f7b901 by Abseil Team <absl-team@google.com>: Clarify span iterator documentation. PiperOrigin-RevId: 299110584 -- 80d016d8026b8d6904aa0ff2d5e1c3ae27f129bb by Greg Falcon <gfalcon@google.com>: Add Cord::TryFlat(). PiperOrigin-RevId: 298889772 -- da6900203f1e4131d5693cbca157b6dba099bbed by Greg Falcon <gfalcon@google.com>: clang-format cord_test.cc. PiperOrigin-RevId: 298851425 GitOrigin-RevId: 44ccc0320ffaa2106ba3c6393b5a40c3b4f7b901 Change-Id: Ia5394f6fbb473d206726fdd48a00eb07a6acad6a
Diffstat (limited to '')
-rw-r--r-- | absl/types/span.h | 34 |
1 files changed, 24 insertions, 10 deletions
diff --git a/absl/types/span.h b/absl/types/span.h index 25347c63fe8c..21cda34b1f22 100644 --- a/absl/types/span.h +++ b/absl/types/span.h @@ -292,60 +292,74 @@ class Span { // Span::front() // - // Returns a reference to the first element of this span. + // Returns a reference to the first element of this span. The span must not + // be empty. constexpr reference front() const noexcept { return ABSL_ASSERT(size() > 0), *data(); } // Span::back() // - // Returns a reference to the last element of this span. + // Returns a reference to the last element of this span. The span must not + // be empty. constexpr reference back() const noexcept { return ABSL_ASSERT(size() > 0), *(data() + size() - 1); } // Span::begin() // - // Returns an iterator to the first element of this span. + // Returns an iterator pointing to the first element of this span, or `end()` + // if the span is empty. constexpr iterator begin() const noexcept { return data(); } // Span::cbegin() // - // Returns a const iterator to the first element of this span. + // Returns a const iterator pointing to the first element of this span, or + // `end()` if the span is empty. constexpr const_iterator cbegin() const noexcept { return begin(); } // Span::end() // - // Returns an iterator to the last element of this span. + // Returns an iterator pointing just beyond the last element at the + // end of this span. This iterator acts as a placeholder; attempting to + // access it results in undefined behavior. constexpr iterator end() const noexcept { return data() + size(); } // Span::cend() // - // Returns a const iterator to the last element of this span. + // Returns a const iterator pointing just beyond the last element at the + // end of this span. This iterator acts as a placeholder; attempting to + // access it results in undefined behavior. constexpr const_iterator cend() const noexcept { return end(); } // Span::rbegin() // - // Returns a reverse iterator starting at the last element of this span. + // Returns a reverse iterator pointing to the last element at the end of this + // span, or `rend()` if the span is empty. constexpr reverse_iterator rbegin() const noexcept { return reverse_iterator(end()); } // Span::crbegin() // - // Returns a reverse const iterator starting at the last element of this span. + // Returns a const reverse iterator pointing to the last element at the end of + // this span, or `crend()` if the span is empty. constexpr const_reverse_iterator crbegin() const noexcept { return rbegin(); } // Span::rend() // - // Returns a reverse iterator starting at the first element of this span. + // Returns a reverse iterator pointing just before the first element + // at the beginning of this span. This pointer acts as a placeholder; + // attempting to access its element results in undefined behavior. constexpr reverse_iterator rend() const noexcept { return reverse_iterator(begin()); } // Span::crend() // - // Returns a reverse iterator starting at the first element of this span. + // Returns a reverse const iterator pointing just before the first element + // at the beginning of this span. This pointer acts as a placeholder; + // attempting to access its element results in undefined behavior. constexpr const_reverse_iterator crend() const noexcept { return rend(); } // Span mutations |