parse static method

PreciseDateTime parse(
  1. String formattedString
)

Constructs a new PreciseDateTime instance based on formattedString.

Throws a FormatException if the input string cannot be parsed.

The function parses a subset of ISO 8601, which includes the subset accepted by RFC 3339.

The accepted inputs are currently:

  • A date: A signed four-to-six digit year, two digit month and two digit day, optionally separated by - characters. Examples: "19700101", "-0004-12-24", "81030-04-01".
  • An optional time part, separated from the date by either T or a space. The time part is a two digit hour, then optionally a two digit minutes value, then optionally a two digit seconds value, and then optionally a '.' or ',' followed by at least a one digit second fraction. The minutes and seconds may be separated from the previous parts by a ':'. Examples: "12", "12:30:24.124", "12:30:24,124", "123010.50".
  • An optional time-zone offset part, possibly separated from the previous by a space. The time zone is either 'z' or 'Z', or it is a signed two digit hour part and an optional two digit minute part. The sign must be either "+" or "-", and cannot be omitted. The minutes may be separated from the hours by a ':'. Examples: "Z", "-10", "+01:30", "+1130".

This includes the output of toString, which will be parsed back into a PreciseDateTime object with the same time as the original.

The result is always in either local time or UTC. If a time zone offset other than UTC is specified, the time is converted to the equivalent UTC time.

Examples of accepted strings:

  • "2012-02-27"
  • "2012-02-27 13:27:00"
  • "2012-02-27 13:27:00.123456789z"
  • "2012-02-27 13:27:00,123456789z"
  • "20120227 13:27:00"
  • "20120227T132700"
  • "20120227"
  • "+20120227"
  • "2012-02-27T14Z"
  • "2012-02-27T14+00:00"
  • "-123450101 00:00:00 Z": in the year -12345.
  • "2002-02-27T14:00:00-0500": Same as "2002-02-27T19:00:00Z"

This method accepts out-of-range component values and interprets them as overflows into the next larger component.

For example, "2020-01-42" will be parsed as 2020-02-11, because the last valid date in that month is 2020-01-31, so 42 days is interpreted as 31 days of that month plus 11 days into the next month.

Implementation

static PreciseDateTime parse(String formattedString) =>
    PreciseDateTime(DateTime.parse(formattedString));