module Regexp::Syntax
Define the base module and the simplest of tokens.
After loading all the tokens the map is full. Extract all tokens and types into the All and Types constants.
Constants
- CURRENT
- VERSION_CONST_REGEXP
- VERSION_FORMAT
- VERSION_REGEXP
Public Instance Methods
comparable(name)
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# File lib/regexp_parser/syntax/version_lookup.rb, line 61 def comparable(name) # add .99 to treat versions without a patch value as latest patch version Gem::Version.new((name.to_s.scan(/\d+/) << 99).join('.')) end
const_missing(const_name)
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Calls superclass method
# File lib/regexp_parser/syntax/version_lookup.rb, line 44 def const_missing(const_name) if const_name =~ VERSION_CONST_REGEXP return fallback_version_class(const_name) end super end
fallback_version_class(version)
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# File lib/regexp_parser/syntax/version_lookup.rb, line 51 def fallback_version_class(version) sorted = (specified_versions + [version]).sort_by { |ver| comparable(ver) } index = sorted.index(version) index > 0 && const_get(sorted[index - 1]) end
for(name)
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Returns the syntax specification class for the given syntax version name. The special names βanyβ and β*β return Syntax::Any
.
# File lib/regexp_parser/syntax/version_lookup.rb, line 22 def for(name) (@alias_map ||= {})[name] ||= version_class(name) end
new(name)
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# File lib/regexp_parser/syntax/version_lookup.rb, line 26 def new(name) warn 'Regexp::Syntax.new is deprecated in favor of Regexp::Syntax.for. '\ 'It does not return distinct instances and will be removed in v3.0.0.' self.for(name) end
specified_versions()
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# File lib/regexp_parser/syntax/version_lookup.rb, line 57 def specified_versions constants.select { |const_name| const_name =~ VERSION_CONST_REGEXP } end
supported?(name)
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# File lib/regexp_parser/syntax/version_lookup.rb, line 32 def supported?(name) name =~ VERSION_REGEXP && comparable(name) >= comparable('1.8.6') end
version_class(version)
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# File lib/regexp_parser/syntax/version_lookup.rb, line 36 def version_class(version) return Regexp::Syntax::Any if ['*', 'any'].include?(version.to_s) version =~ VERSION_REGEXP || raise(InvalidVersionNameError, version) version_const_name = "V#{version.to_s.scan(/\d+/).join('_')}" const_get(version_const_name) || raise(UnknownSyntaxNameError, version) end