Determine how many (if any) of the delimiter characters should be used

This allows implementations to decide how many characters to use based on the properties of the delimiter runs.

An implementation can also return 0 when it doesn't want to allow this particular combination of delimiter runs.

Property definitions

markdown2 $ MdDelimiterProcessor :: delimiter_use
	# Determine how many (if any) of the delimiter characters should be used
	#
	# This allows implementations to decide how many characters to use based on the
	# properties of the delimiter runs.
	#
	# An implementation can also return 0 when it doesn't want to allow this particular
	# combination of delimiter runs.
	fun delimiter_use(opener, closer: MdDelimiter): Int is abstract
lib/markdown2/markdown_inline_parsing.nit:1140,2--1147,64

markdown2 $ MdStaggeredDelimiterProcessor :: delimiter_use
	redef fun delimiter_use(opener, closer) do
		return find_processor(opener.length).delimiter_use(opener, closer)
	end
lib/markdown2/markdown_inline_parsing.nit:1287,2--1289,4

markdown2 $ MdEmphasisDelimiterProcessor :: delimiter_use
	redef fun delimiter_use(opener, closer) do
		# "multiple of 3" rule for internal delimiter runs
		if (opener.can_close or closer.can_open) and
		   ((opener.original_length + closer.original_length) % 3 == 0) then
			return 0
		end
		# calculate actual number of delimiters used from this closer
		if opener.length >= 2 and closer.length >= 2 then
			return 2
		end
		return 1
	end
lib/markdown2/markdown_inline_parsing.nit:1307,2--1318,4

markdown2 $ MdStrikeProcessor :: delimiter_use
	redef fun delimiter_use(opener, closer) do return opener.original_length
lib/markdown2/markdown_github.nit:62,2--73

markdown2 $ MdSuperProcessor :: delimiter_use
	redef fun delimiter_use(opener, closer) do return opener.original_length
lib/markdown2/markdown_github.nit:94,2--73