Locale-invariant parsing and formatting #343
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Will be useful for representing the state of fractions of second internally.
Whether the month is formatted as a number or a name, and whether it's stored in `LocalDate` or `LocalDateTime`, we still say that this field represents a year. Each `FieldSpec` instance is a distinct such field.
We need a way to specify "format a month as a name" and "format a month as a number without padding." The new `FieldFormatDirective` interface encodes this concept.
`FormatStructure` defines how a thing is parsed and/or formatted. It encodes a group of `FieldFormatDirective` instances and directs how they should behave as a collective: * should they be parsed/output optionally? * can there be several alternatives during parsing? * etc. The intended way to use the format machinery is to specify a `FormatStructure` instance and obtain a parser or a formatter by calling `parser()` or `formatter()` on it. `CachedFormatStructure` can be used as a thin caching wrapper, ensuring `parser()` and `formatter()` don't get called repeatedly.
The new class is the superinterface of all the receivers exposed via the format builder DSL.
Also, provide means of parsing and formatting it.
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G.O.A.T. 🐐 |
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The same thing as #251 (except for small tidying up here and there), with the commit history rewritten to be more manageable. @ilya-g, does this commit history look ok?