diff options
Diffstat (limited to 'source/blender/blenlib/BLI_index_range.hh')
| -rw-r--r-- | source/blender/blenlib/BLI_index_range.hh | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/source/blender/blenlib/BLI_index_range.hh b/source/blender/blenlib/BLI_index_range.hh index bd0a7e5bb7a..6fcc560d856 100644 --- a/source/blender/blenlib/BLI_index_range.hh +++ b/source/blender/blenlib/BLI_index_range.hh @@ -198,6 +198,16 @@ class IndexRange { } /** + * Get the element one before the beginning. The returned value is undefined when the range is + * empty, and the range must start after zero already. + */ + constexpr int64_t one_before_start() const + { + BLI_assert(start_ > 0); + return start_ - 1; + } + + /** * Get the element one after the end. The returned value is undefined when the range is empty. */ constexpr int64_t one_after_last() const |