Class: Inversion::Template::CodeTag::TokenPattern

Inherits:
Ripper::TokenPattern
  • Object
show all
Extended by:
Loggability
Defined in:
lib/inversion/template/codetag.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#source ⇒ Object (readonly)

Expose the source attribute



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# File 'lib/inversion/template/codetag.rb', line 50

def source
  @source
end

Instance Method Details

#compile(pattern) ⇒ Object

Overloaded to generate a bound regex.



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# File 'lib/inversion/template/codetag.rb', line 54

def compile( pattern )
	self.log.debug "Compiling token pattern from: %p" % [ pattern ]

	if m = /[^\w\s$()\[\]{}?*+\.]/.match( pattern )
		raise Ripper::TokenPattern::CompileError, "invalid char in pattern: #{m[0].inspect}"
	end

	buf = +'\\A'
	pattern.scan(/(?:\w+|\$\(|[()\[\]\{\}?*+\.]+)/) do |tok|
		case tok
		when /\w/
			buf.concat( map_token(tok) )
		when '$('
			buf.concat( '(' )
		when '('
			buf.concat( '(?:' )
		when /[?*\[\])\.]/
			buf.concat( tok )
		else
			raise 'must not happen'
		end
	end
	buf.concat( '\z' )

	self.log.debug "  resulting token pattern is: %p" % [ buf ]
	return Regexp.compile( buf )

rescue RegexpError => err
	raise Ripper::TokenPattern::CompileError, err.message
end