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Contents
module Unitwise
module Expression
# Matcher is responsible for building up Parslet alternatives of atoms and
# prefixes to be used by Unitwise::Expression::Parser.
class Matcher
class << self
def atom(mode)
@atom ||= {}
@atom[mode] ||= new(Atom.all, mode).alternative
end
def metric_atom(mode)
@metric_atom ||= {}
@metric_atom[mode] ||=
new(Atom.all.select(&:metric?), mode).alternative
end
def prefix(mode)
@prefix ||= {}
@prefix[mode] ||= new(Prefix.all, mode).alternative
end
end
attr_reader :collection, :mode
def initialize(collection, mode = :primary_code)
@collection = collection
@mode = mode
end
def strings
collection.map(&mode).flatten.compact.sort do |x, y|
y.length <=> x.length
end
end
def matchers
strings.map { |s| Parslet::Atoms::Str.new(s) }
end
def alternative
Parslet::Atoms::Alternative.new(*matchers)
end
end
end
end
Version data entries
6 entries across 6 versions & 2 rubygems