diff options
Diffstat (limited to 'butl/timestamp')
| -rw-r--r-- | butl/timestamp | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/butl/timestamp b/butl/timestamp index cb515cb..550aa68 100644 --- a/butl/timestamp +++ b/butl/timestamp @@ -21,9 +21,10 @@ namespace butl // based on UNIX epoch. // // The underlying type for nanoseconds duration is signed integer type - // of at least 64 bits (currently int64_t). Because it is signed, we - // will overflow in year 2262 but by then the underlying type will - // most likely have changed to something larger than 64-bit. + // of at least 64 bits (currently int64_t, available as duration::rep). + // Because it is signed, we will overflow in year 2262 but by then the + // underlying type will most likely have changed to something larger + // than 64-bit. // // So to support other platforms that could possibly use a different // system_clock resolutions (e.g., microseconds), we actually not going @@ -38,10 +39,13 @@ namespace butl using timestamp = system_clock::time_point; using duration = system_clock::duration; - // Generally-useful special values. + // Generally-useful special values. Note that unknown is less than + // nonexistent and is less than any non-special value. // - const timestamp timestamp_unknown = timestamp (duration (-1)); - const timestamp timestamp_nonexistent = timestamp (duration (0)); + const timestamp::rep timestamp_unknown_rep = -1; + const timestamp timestamp_unknown = timestamp (duration (-1)); + const timestamp::rep timestamp_nonexistent_rep = 0; + const timestamp timestamp_nonexistent = timestamp (duration (0)); // Print human-readable representation of the timestamp. // |