Module: MaRuKu::In::Markdown::SpanLevelParser
- Includes:
- Helpers
- Included in:
- BlockLevelParser, CharSourceManual, CharSourceStrscan, MDDocument
- Defined in:
- lib/maruku.rb,
lib/maruku/attributes.rb,
lib/maruku/input/charsource.rb,
lib/maruku/input/html_helper.rb,
lib/maruku/input/parse_span_better.rb
Defined Under Namespace
Classes: CharSourceDebug, CharSourceManual, CharSourceStrscan, HTMLHelper, SpanContext
Constant Summary collapse
- CharSource =
CharSource = CharSourceStrscan
CharSourceManual
- EscapedCharInText =
Set.new [?\\,?`,?*,?_,?{,?},?[,?],?(,?),?#,?.,?!,?|,?:,?+,?-,?>]
- EscapedCharInQuotes =
Set.new [?\\,?`,?*,?_,?{,?},?[,?],?(,?),?#,?.,?!,?|,?:,?+,?-,?>,?',?"]
- EscapedCharInInlineCode =
[?\\,?`]
- SPACE =
32
?\
- R_REF_ID =
R_REF_ID = Regexp.compile(/(s]*)(s*])/)
Regexp.compile(/([^\]\s]*)(\s*\])/)
Instance Method Summary collapse
- #describe_pos(buffer, buffer_index) ⇒ Object
-
#is_ial(e) ⇒ Object
We need a helper.
- #md_al(s = []) ⇒ Object
- #parse_lines_as_span(lines) ⇒ Object
- #parse_span_better(string) ⇒ Object
-
#read_attribute_list(src, con, break_on_chars) ⇒ Object
returns nil or an AttributeList.
- #read_em(src, delim) ⇒ Object
- #read_email_el(src, con) ⇒ Object
- #read_emstrong(src, delim) ⇒ Object
- #read_footnote_ref(src, con) ⇒ Object
-
#read_image(src, con) ⇒ Object
read link.
- #read_inline_code(src, con) ⇒ Object
- #read_inline_html(src, con) ⇒ Object
- #read_link(src, con) ⇒ Object
-
#read_quoted(src, con) ⇒ Object
Tries to read a quoted value.
- #read_quoted_or_unquoted(src, con, escaped, exit_on_chars) ⇒ Object
-
#read_ref_id(src, con) ⇒ Object
Reads a bracketed id “[refid]”.
- #read_server_directive(src, con) ⇒ Object
-
#read_simple(src, escaped, exit_on_chars, exit_on_strings = nil) ⇒ Object
Reads a simple string (no formatting) until one of break_on_chars, while escaping the escaped.
-
#read_span(src, escaped, exit_on_chars, exit_on_strings = nil) ⇒ Object
This is the main loop for reading span elements.
- #read_strong(src, delim) ⇒ Object
- #read_url(src, break_on) ⇒ Object
- #read_url_el(src, con) ⇒ Object
- #unit_tests_for_attribute_lists ⇒ Object
Methods included from Helpers
#md_abbr, #md_abbr_def, #md_ald, #md_br, #md_code, #md_codeblock, #md_el, #md_em, #md_email, #md_emstrong, #md_entity, #md_foot_ref, #md_footnote, #md_header, #md_hrule, #md_html, #md_ial, #md_im_image, #md_im_link, #md_image, #md_li, #md_link, #md_par, #md_quote, #md_ref_def, #md_server, #md_strong, #md_url
Instance Method Details
#describe_pos(buffer, buffer_index) ⇒ Object
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# File 'lib/maruku/input/charsource.rb', line 148 def describe_pos(buffer, buffer_index) len = 75 num_before = [len/2, buffer_index].min num_after = [len/2, buffer.size-buffer_index].min num_before_max = buffer_index num_after_max = buffer.size-buffer_index # puts "num #{num_before} #{num_after}" num_before = [num_before_max, len-num_after].min num_after = [num_after_max, len-num_before].min # puts "num #{num_before} #{num_after}" index_start = [buffer_index - num_before, 0].max index_end = [buffer_index + num_after, buffer.size].min size = index_end- index_start # puts "- #{index_start} #{size}" str = buffer[index_start, size] str.gsub!("\n",'N') str.gsub!("\t",'T') if index_end == buffer.size str += "EOF" end pre_s = buffer_index-index_start pre_s = [pre_s, 0].max pre_s2 = [len-pre_s,0].max # puts "pre_S = #{pre_s}" pre =" "*(pre_s) "-"*len+"\n"+ str + "\n" + "-"*pre_s + "|" + "-"*(pre_s2)+"\n"+ # pre + "|\n"+ pre + "+--- Byte #{buffer_index}\n"+ "Shown bytes [#{index_start} to #{size}] of #{buffer.size}:\n"+ add_tabs(buffer,1,">") # "CharSource: At character #{@buffer_index} of block "+ # " beginning with:\n #{@buffer[0,50].inspect} ...\n"+ # " before: \n ... #{cur_chars(50).inspect} ... " end |
#is_ial(e) ⇒ Object
We need a helper
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# File 'lib/maruku/input/parse_span_better.rb', line 203 def is_ial(e); e.kind_of? MDElement and e.node_type == :ial end |
#md_al(s = []) ⇒ Object
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# File 'lib/maruku/attributes.rb', line 124 def md_al(s=[]); AttributeList.new(s) end |
#parse_lines_as_span(lines) ⇒ Object
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# File 'lib/maruku/input/parse_span_better.rb', line 35 def parse_lines_as_span(lines) parse_span_better lines.join("\n") end |
#parse_span_better(string) ⇒ Object
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# File 'lib/maruku/input/parse_span_better.rb', line 39 def parse_span_better(string) if not string.kind_of? String then error "Passed #{string.class}." end st = (string + "") st.freeze src = CharSource.new(st) read_span(src, EscapedCharInText, [nil]) end |
#read_attribute_list(src, con, break_on_chars) ⇒ Object
returns nil or an AttributeList
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# File 'lib/maruku/attributes.rb', line 127 def read_attribute_list(src, con, break_on_chars) separators = break_on_chars + [?=,?\ ,?\t] escaped = Maruku::EscapedCharInQuotes al = AttributeList.new while true src.consume_whitespace break if break_on_chars.include? src.cur_char case src.cur_char when nil maruku_error "Attribute list terminated by EOF:\n "+ "#{al.inspect}" , src, con tell_user "I try to continue and return partial attribute list:\n"+ al.inspect break when ?= # error maruku_error "In attribute lists, cannot start identifier with `=`." tell_user "I try to continue" src.ignore_char when ?# # id definition src.ignore_char if id = read_quoted_or_unquoted(src, con, escaped, separators) al.push_id id else maruku_error 'Could not read `id` attribute.', src, con tell_user 'Trying to ignore bad `id` attribute.' end when ?. # class definition src.ignore_char if klass = read_quoted_or_unquoted(src, con, escaped, separators) al.push_class klass else maruku_error 'Could not read `class` attribute.', src, con tell_user 'Trying to ignore bad `class` attribute.' end else if key = read_quoted_or_unquoted(src, con, escaped, separators) if src.cur_char == ?= src.ignore_char # skip the = if val = read_quoted_or_unquoted(src, con, escaped, separators) al.push_key_val(key, val) else maruku_error "Could not read value for key #{key.inspect}.", src, con tell_user "Ignoring key #{key.inspect}." end else al.push_ref key end else maruku_error 'Could not read key or reference.' end end # case end # while true al end |
#read_em(src, delim) ⇒ Object
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# File 'lib/maruku/input/parse_span_better.rb', line 361 def read_em(src, delim) src.ignore_char children = read_span(src, EscapedCharInText, nil, [delim]) src.ignore_char md_em(children) end |
#read_email_el(src, con) ⇒ Object
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# File 'lib/maruku/input/parse_span_better.rb', line 265 def read_email_el(src,con) src.ignore_char # leading < mail = read_simple(src, [], [?>]) src.ignore_char # closing > address = mail.gsub(/^mailto:/,'') con.push_element md_email(address) end |
#read_emstrong(src, delim) ⇒ Object
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# File 'lib/maruku/input/parse_span_better.rb', line 375 def read_emstrong(src, delim) src.ignore_chars(3) children = read_span(src, EscapedCharInText, nil, [delim]) src.ignore_chars(3) md_emstrong(children) end |
#read_footnote_ref(src, con) ⇒ Object
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# File 'lib/maruku/input/parse_span_better.rb', line 401 def read_footnote_ref(src,con) ref = read_ref_id(src,con) con.push_element md_foot_ref(ref) end |
#read_image(src, con) ⇒ Object
read link
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# File 'lib/maruku/input/parse_span_better.rb', line 533 def read_image(src, con) src.ignore_chars(2) # opening "![" alt_text = read_span(src, EscapedCharInText, [?]]) src.ignore_char # closing bracket # ignore space if src.cur_char == SPACE and (src.next_char == ?[ or src.next_char == ?( ) src.ignore_char end case src.cur_char when ?( src.ignore_char # opening ( src.consume_whitespace url = read_url(src, [SPACE,?\t,?)]) if not url error "Could not read url from #{src.cur_chars(10).inspect}", src,con end src.consume_whitespace title = nil if src.cur_char != ?) # we have a title quote_char = src.cur_char title = read_quoted(src,con) if not title maruku_error 'Must quote title',src,con else # Tries to read a title with quotes: ![a](url "ti"tle") # this is the most ugly thing in Markdown if not src.next_matches(/\s*\)/) # if there is not a closing par ), then read # the rest and guess it's title with quotes rest = read_simple(src, escaped=[], break_on_chars=[?)], break_on_strings=[]) # chop the closing char rest.chop! title << quote_char << rest end end end src.consume_whitespace closing = src.shift_char # closing ) if closing != ?) error ("Unclosed link: '"<<closing<<"'")+ " Read url=#{url.inspect} title=#{title.inspect}",src,con end con.push_element md_im_image(alt_text, url, title) when ?[ # link ref ref_id = read_ref_id(src,con) con.push_element md_image(alt_text, ref_id) else # no stuff con.push_elements children end end |
#read_inline_code(src, con) ⇒ Object
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# File 'lib/maruku/input/parse_span_better.rb', line 435 def read_inline_code(src, con) # Count the number of ticks num_ticks = 0 while src.cur_char == ?` num_ticks += 1 src.ignore_char end # We will read until this string end_string = "`"*num_ticks code = read_simple(src, escaped=[], break_on_chars=[], break_on_strings=[end_string]) # puts "Now I expects #{num_ticks} ticks: #{src.cur_chars(10).inspect}" src.ignore_chars num_ticks # Ignore at most one space if num_ticks > 1 && code[0] == SPACE code = code[1, code.size-1] end # drop last space if num_ticks > 1 && code[-1] == SPACE code = code[0,code.size-1] end # puts "Read `` code: #{code.inspect}; after: #{src.cur_chars(10).inspect} " con.push_element md_code(code) end |
#read_inline_html(src, con) ⇒ Object
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# File 'lib/maruku/input/parse_span_better.rb', line 406 def read_inline_html(src, con) h = HTMLHelper.new begin # This is our current buffer in the context start = src.current_remaining_buffer h.eat_this start if not h.is_finished? error "inline_html: Malformed:\n "+ "#{start.inspect}\n #{h.inspect}",src,con end consumed = start.size - h.rest.size if consumed > 0 con.push_element md_html(h.stuff_you_read) src.ignore_chars(consumed) else puts "HTML helper did not work on #{start.inspect}" con.push_char src.shift_char end rescue Exception => e maruku_error "Bad html: \n" + add_tabs(e.inspect+e.backtrace.join("\n"),1,'>'), src,con maruku_recover "I will try to continue after bad HTML.", src, con con.push_char src.shift_char end end |
#read_link(src, con) ⇒ Object
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# File 'lib/maruku/input/parse_span_better.rb', line 466 def read_link(src, con) # we read the string and see what happens src.ignore_char # opening bracket children = read_span(src, EscapedCharInText, [?]]) src.ignore_char # closing bracket # ignore space if src.cur_char == SPACE and (src.next_char == ?[ or src.next_char == ?( ) src.shift_char end case src.cur_char when ?( src.ignore_char # opening ( src.consume_whitespace url = read_url(src, [SPACE,?\t,?)]) if not url url = '' # no url is ok end src.consume_whitespace title = nil if src.cur_char != ?) # we have a title quote_char = src.cur_char title = read_quoted(src,con) if not title maruku_error 'Must quote title',src,con else # Tries to read a title with quotes: ![a](url "ti"tle") # this is the most ugly thing in Markdown if not src.next_matches(/\s*\)/) # if there is not a closing par ), then read # the rest and guess it's title with quotes rest = read_simple(src, escaped=[], break_on_chars=[?)], break_on_strings=[]) # chop the closing char rest.chop! title << quote_char << rest end end end src.consume_whitespace closing = src.shift_char # closing ) if closing != ?) maruku_error 'Unclosed link',src,con maruku_recover "No closing ): I will not create"+ " the link for #{children.inspect}", src, con con.push_elements children return end con.push_element md_im_link(children,url, title) when ?[ # link ref ref_id = read_ref_id(src,con) if ref_id con.push_element md_link(children, ref_id) else maruku_error "Could not read ref_id", src, con maruku_recover "I will not create the link for "+ "#{children.inspect}", src, con con.push_elements children return end else # no stuff con.push_elements children end end |
#read_quoted(src, con) ⇒ Object
Tries to read a quoted value. If stream does not start with ‘ or “, returns nil.
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# File 'lib/maruku/input/parse_span_better.rb', line 307 def read_quoted(src, con) case src.cur_char when ?', ?" quote_char = src.shift_char # opening quote string = read_simple(src, EscapedCharInQuotes, [quote_char]) src.ignore_char # closing quote return string else # puts "Asked to read quote from: #{src.cur_chars(10).inspect}" return nil end end |
#read_quoted_or_unquoted(src, con, escaped, exit_on_chars) ⇒ Object
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# File 'lib/maruku/input/parse_span_better.rb', line 296 def read_quoted_or_unquoted(src, con, escaped, exit_on_chars) case src.cur_char when ?', ?" read_quoted(src, con) else read_simple(src, escaped, exit_on_chars) end end |
#read_ref_id(src, con) ⇒ Object
Reads a bracketed id “[refid]”. Consumes also both brackets.
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# File 'lib/maruku/input/parse_span_better.rb', line 388 def read_ref_id(src, con) src.ignore_char # [ src.consume_whitespace # puts "Next: #{src.cur_chars(10).inspect}" if m = src.read_regexp(R_REF_ID) # puts "Got: #{m[1].inspect} Ignored: #{m[2].inspect}" # puts "Then: #{src.cur_chars(10).inspect}" m[1] else nil end end |
#read_server_directive(src, con) ⇒ Object
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# File 'lib/maruku/input/parse_span_better.rb', line 242 def read_server_directive(src, con) delim = "?>" src.ignore_chars delim.size code = read_simple(src, escaped=[], break_on_chars=[], break_on_strings=[delim]) src.ignore_chars delim.size code = (code || "").strip con.push_element md_server(code) end |
#read_simple(src, escaped, exit_on_chars, exit_on_strings = nil) ⇒ Object
Reads a simple string (no formatting) until one of break_on_chars, while escaping the escaped. If the string is empty, it returns nil. Raises on error.
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# File 'lib/maruku/input/parse_span_better.rb', line 324 def read_simple(src, escaped, exit_on_chars, exit_on_strings=nil) text = "" while true # puts "Reading simple #{text.inspect}" c = src.cur_char if exit_on_chars && exit_on_chars.include?(c) # puts (" breaking on "<<c)+" contained in "+exit_on_chars.inspect break end break if exit_on_strings && exit_on_strings.any? {|x| src.cur_chars_are x} case c when nil s= "String finished while reading (break on "+ "#{exit_on_chars.map{|x|""<<x}.inspect})"+ " already read: #{text.inspect}" maruku_error s, src maruku_recover "I boldly continue", src, con break when ?\\ d = src.next_char if escaped.include? d src.ignore_chars(2) text << d else text << src.shift_char end else text << src.shift_char end end # puts "Read simple #{text.inspect}" text.empty? ? nil : text end |
#read_span(src, escaped, exit_on_chars, exit_on_strings = nil) ⇒ Object
This is the main loop for reading span elements
It’s long, but not complex or difficult to understand.
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# File 'lib/maruku/input/parse_span_better.rb', line 54 def read_span(src, escaped, exit_on_chars, exit_on_strings=nil) con = SpanContext.new c = d = nil while true c = src.cur_char # This is only an optimization which cuts 50% of the time used. # (but you can't use a-zA-z in exit_on_chars) if c && ((c>=?a && c<=?z) || ((c>=?A && c<=?Z))) con.cur_string << src.shift_char next end break if exit_on_chars && exit_on_chars.include?(c) break if exit_on_strings && exit_on_strings.any? {|x| src.cur_chars_are x} case c when ?\ # it's space (32) if src.cur_chars_are " \n" src.ignore_chars(3) con.push_element md_br() next else src.ignore_char con.push_space end when ?\n, ?\t src.ignore_char con.push_space when ?` read_inline_code(src,con) when ?< # It could be: # 1) HTML "<div ..." # 2) HTML "<!-- ..." # 3) url "<http:// ", "<ftp:// ..." # 4) email "<andrea@... ", "<mailto:andrea@..." # 5) on itself! "a < b " case d = src.next_char when ?!; if src.cur_chars_are '<!--' read_inline_html(src, con) else con.push_char src.shift_char end when ?? read_server_directive(src, con) when ?\ , ?\t con.push_char src.shift_char else if src.next_matches(/<mailto:/) or src.next_matches(/<[\w\.]+\@/) read_email_el(src, con) elsif src.next_matches(/<\w+:/) read_url_el(src, con) elsif src.next_matches(/<\w/) #puts "This is HTML: #{src.cur_chars(20)}" read_inline_html(src, con) else #puts "This is NOT HTML: #{src.cur_chars(20)}" con.push_char src.shift_char end end when ?\\ d = src.next_char if escaped.include? d src.ignore_chars(2) con.push_char d else con.push_char src.shift_char end when ?[ if markdown_extra? && src.next_char == ?^ read_footnote_ref(src,con) else read_link(src, con) end when ?! if src.next_char == ?[ read_image(src, con) else con.push_char src.shift_char end when ?& if m = src.read_regexp(/\&([\w\d]+);/) con.push_element md_entity(m[1]) else con.push_char src.shift_char end when ?* if not src.next_char maruku_error "Opening * as last char.", src, con maruku_recover "Threating as literal" con.push_char src.shift_char else follows = src.cur_chars(4) if follows =~ /^\*\*\*[^\s\*]/ con.push_element read_emstrong(src,'***') elsif follows =~ /^\*\*[^\s\*]/ con.push_element read_strong(src,'**') elsif follows =~ /^\*[^\s\*]/ con.push_element read_em(src,'*') else # * is just a normal char con.push_char src.shift_char end end when ?_ if not src.next_char maruku_error "Opening _ as last char", src, con maruku_recover "Threating as literal", src, con con.push_char src.shift_char else follows = src.cur_chars(4) if follows =~ /^\_\_\_[^\s\_]/ con.push_element read_emstrong(src,'___') elsif follows =~ /^\_\_[^\s\_]/ con.push_element read_strong(src,'__') elsif follows =~ /^\_[^\s\_]/ con.push_element read_em(src,'_') else # _ is just a normal char con.push_char src.shift_char end end when ?{ # inline attribute list if src.ignore_char # opening { ial = md_ial(al=read_attribute_list(src, con, [?}])) src.ignore_char # closing } con.push_element ial else # normal text con.push_char src.shift_char end when nil maruku_error ("Unclosed span (waiting for %s"+ "#{exit_on_strings.inspect})") % [ exit_on_chars ? "#{exit_on_chars.inspect} or" : ""], src,con break else # normal text con.push_char src.shift_char end # end case end # end while true con.push_string_if_present # Now we handle the IAL stuff # We need a helper def is_ial(e); e.kind_of? MDElement and e.node_type == :ial end # A IAL at the beginning is strange and we ignore it if false && is_ial(e=con.elements[0]) "Attribute list at the beginning of span {#{e.to_md}}" tell_user "Ignoring {#{e.to_md}}" con.elements.shift end # Apply each IAL to the element before con.elements.each_with_index do |e, i| if is_ial(e) && i>= 1 then before = con.elements[i-1] if before.kind_of? MDElement #puts "Assigning #{e.ial} to #{before}" before.al = e.ial else maruku_error "This IAL: {#{e.ial.to_md}} seems to"+ " refer to a string:\n"+ before.inspect, src, con maruku_recover "Ignoring IAL: {#{e.ial.to_md}}", src, con end end end # Remove all IAL # con.elements.delete_if { |e| is_ial(e) } # Remove leading space if (s = con.elements.first).kind_of? String if s[0] == ?\ then con.elements[0] = s[1, s.size-1] end con.elements.shift if s.size == 0 end # Remove final spaces if (s = con.elements.last).kind_of? String s.chop! if s[-1] == ?\ con.elements.pop if s.size == 0 end con.elements end |
#read_strong(src, delim) ⇒ Object
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# File 'lib/maruku/input/parse_span_better.rb', line 368 def read_strong(src, delim) src.ignore_chars(2) children = read_span(src, EscapedCharInText, nil, [delim]) src.ignore_chars(2) md_strong(children) end |
#read_url(src, break_on) ⇒ Object
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# File 'lib/maruku/input/parse_span_better.rb', line 274 def read_url(src, break_on) if [?',?"].include? src.cur_char error 'Invalid char for url', src end url = read_simple(src, [], break_on) if not url # empty url url = "" end if url[0] == ?< && url[-1] == ?> url = url[1, url.size-2] end if url.size == 0 return nil end url end |
#read_url_el(src, con) ⇒ Object
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# File 'lib/maruku/input/parse_span_better.rb', line 257 def read_url_el(src,con) src.ignore_char # leading < url = read_simple(src, [], [?>]) src.ignore_char # closing > con.push_element md_url(url) end |
#unit_tests_for_attribute_lists ⇒ Object
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# File 'lib/maruku/attributes.rb', line 76 def unit_tests_for_attribute_lists [ [ "", [], "Empty lists are allowed" ], [ "=", :throw, "Bad char to begin a list with." ], [ "a =b", :throw, "No whitespace before `=`." ], [ "a= b", :throw, "No whitespace after `=`." ], [ "'a'", [[:ref, 'a']], "Quoted value." ], [ '"a"' ], [ "a=b", [['a','b']], "Simple key/val" ], [ "'a'=b" ], [ "'a'='b'" ], [ "a='b'" ], [ 'a="b\'"', [['a',"b\'"]], "Key/val with quotes" ], [ 'a=b\''], [ 'a="\\\'b\'"', [['a',"\'b\'"]], "Key/val with quotes" ], ['"', :throw, "Unclosed quotes"], ["'"], ["'a "], ['"a '], [ "#a", [[:id, 'a']], "Simple ID" ], [ "#'a'" ], [ '#"a"' ], [ "#", :throw, "Unfinished '#'." ], [ ".", :throw, "Unfinished '.'." ], [ "# a", :throw, "No white-space after '#'." ], [ ". a", :throw, "No white-space after '.' ." ], [ "a=b c=d", [['a','b'],['c','d']], "Tabbing" ], [ " \ta=b \tc='d' "], [ "\t a=b\t c='d'\t\t"], [ ".\"a'", :throw, "Mixing quotes is bad." ], ].map { |s, expected, comment| @expected = (expected ||= @expected) @comment = (comment ||= (last=@comment) ) (comment == last && (comment += (@count+=1).to_s)) || @count = 1 expected = [md_ial(expected)] if expected.kind_of? Array ["{#{s}}", expected, "Attributes: #{comment}"] } end |