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Contents
module Wukong
module FlatPack
module Language
#language definition
SIMPLE_TYPES = %w{i f s b _}
SIMPLE_TYPE_RE = "[#{SIMPLE_TYPES.join}]"
MODIFIERS = %w{+ *}
MODIFIER_RE = "[#{MODIFIERS.join}]"
SIMPLE_TOKEN_RE = "#{SIMPLE_TYPE_RE}(?:#{MODIFIER_RE}|[0-9]+)?"
DATE_TYPES = %w{a A b B c d H I j m M p S U w W x X Y Z}
DATE_TYPES_RE = "[#{DATE_TYPES.join} ]" # the extra space is supposed to be there
DATE_TOKEN_RE = "%#{DATE_TYPES_RE}*%"
FIXED_POINT_TYPE = 'D'
FIXED_POINT_SEP = 'e'
FIXED_POINT_TOKEN_RE = "#{FIXED_POINT_TYPE}\\d+(?:#{FIXED_POINT_SEP}\\d+)?"
TOKENS = [SIMPLE_TOKEN_RE, DATE_TOKEN_RE, FIXED_POINT_TOKEN_RE]
TOKEN_RE = "#{TOKENS.join('|')}"
CAPTURE_TOKEN_RE = /(#{TOKENS.join('|')})/
LANGUAGE_RE = /^(?:(#{TOKEN_RE}) *)+$/
#total regexes, i.e. regexes that must match the whole string
TOTAL_SIMPLE_TYPE_RE = /^#{SIMPLE_TOKEN_RE}$/
TOTAL_FIXED_POINT_RE = /^#{FIXED_POINT_TOKEN_RE}$/
TOTAL_DATE_RE = /^#{DATE_TOKEN_RE}$/
#named regexes used for parsing tokens
NAMED_SIMPLE_TYPE_RE = /(?<type>#{SIMPLE_TYPE_RE})(?:(?<length>[0-9]+)|(?<modifier>#{MODIFIER_RE}))?/
NAMED_FIXED_POINT_RE = /#{FIXED_POINT_TYPE}(?<length>\d+)(?:#{FIXED_POINT_SEP}(?<power>\d+))?/
NAMED_DATE_RE = /%(?<format>#{DATE_TYPES_RE})%/
# Returns true if the supplied string is in
# Flat's formatting language, as determined
# by the LANGUAGE_RE regex.
def self.string_in_lang(str)
return (not (str =~ LANGUAGE_RE).nil?)
end
end
end
end
Version data entries
7 entries across 7 versions & 2 rubygems