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Match one of the collection of patterns.
class option pattern[readonly value element type]
Declaration: option pattern
Announcements: option pattern
Direct supertypes: base pattern
All supertypes: validatable / value / entity / pattern / predicate / function / deeply_immutable data / debuggable / Object / stringable
protected list[pattern[element type]] options
Declaration: options
Use: options / options / options / options / options / options / options / options / options
private mutable var boolean validated
Declaration: validated
Use: validated / validated
option pattern(readonly collection[pattern[element type]] options)
Declaration: constructor
void add option(pattern[element type] option)
Declaration: add option
implement void validate()
Declaration: validate
Direct overrides: validatable
implement implicit boolean call(readonly list[element type] the list)
Declaration: constructor
Direct overrides: function
Check whether the given list can be a start of the sequence that matches this pattern.
implement boolean is viable prefix(readonly list[element type] the list)
Declaration: is viable prefix
Direct overrides: pattern
Returns the maximum number of the elements of a given list that matches the pattern, or null if there is no prefix match. This is a greedy match: it mtaches the longest prefix.
implement nonnegative or null match prefix(readonly list[element type] the list)
Declaration: match prefix
Direct overrides: pattern
Gets the first non-empty match for this pattern.
implement range or null find first(readonly list[element type] the list, var nonnegative start index)
Declaration: find first
Direct overrides: pattern
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