Class: RDoc::RubyLex
- Inherits:
-
Object
- Object
- RDoc::RubyLex
- Extended by:
- Exception2MessageMapper
- Includes:
- IRB, RubyToken
- Defined in:
- lib/rdoc/ruby_lex.rb
Overview
Ruby lexer adapted from irb.
The internals are not documented because they are scary.
Defined Under Namespace
Classes: Error
Constant Summary collapse
- ENINDENT_CLAUSE =
[ "case", "class", "def", "do", "for", "if", "module", "unless", "until", "while", "begin" #, "when" ]
- DEINDENT_CLAUSE =
, “when”
["end" #, "when" ]
- PERCENT_LTYPE =
{ "q" => "\'", "Q" => "\"", "x" => "\`", "r" => "/", "w" => "]", "W" => "]", "s" => ":" }
- PERCENT_PAREN =
{ "{" => "}", "[" => "]", "<" => ">", "(" => ")" }
- PERCENT_PAREN_REV =
PERCENT_PAREN.invert
- Ltype2Token =
{ "\'" => TkSTRING, "\"" => TkSTRING, "\`" => TkXSTRING, "/" => TkREGEXP, "]" => TkDSTRING, ":" => TkSYMBOL }
- DLtype2Token =
{ "\"" => TkDSTRING, "\`" => TkDXSTRING, "/" => TkDREGEXP, }
- IDENT_RE =
if defined? Encoding then eval '/[\w\u{0080}-\u{FFFFF}]/u' # 1.8 can't parse \u{} else /[\w\x80-\xFF]/ end
Constants included from RubyToken
RDoc::RubyToken::EXPR_ARG, RDoc::RubyToken::EXPR_BEG, RDoc::RubyToken::EXPR_CLASS, RDoc::RubyToken::EXPR_DOT, RDoc::RubyToken::EXPR_END, RDoc::RubyToken::EXPR_FNAME, RDoc::RubyToken::EXPR_MID, RDoc::RubyToken::NEWLINE_TOKEN, RDoc::RubyToken::Symbol, RDoc::RubyToken::TkReading2Token, RDoc::RubyToken::TkSymbol2Token, RDoc::RubyToken::TkToken2Reading, RDoc::RubyToken::TokenDefinitions
Class Attribute Summary collapse
-
.debug_level ⇒ Object
Returns the value of attribute debug_level.
Instance Attribute Summary collapse
-
#char_no ⇒ Object
readonly
Returns the value of attribute char_no.
-
#continue ⇒ Object
Returns the value of attribute continue.
-
#exception_on_syntax_error ⇒ Object
Returns the value of attribute exception_on_syntax_error.
-
#indent ⇒ Object
readonly
Returns the value of attribute indent.
-
#lex_state ⇒ Object
Returns the value of attribute lex_state.
-
#line_no ⇒ Object
readonly
Returns the value of attribute line_no.
-
#readed_auto_clean_up ⇒ Object
Returns the value of attribute readed_auto_clean_up.
-
#reader ⇒ Object
readonly
Returns the value of attribute reader.
-
#seek ⇒ Object
readonly
Returns the value of attribute seek.
-
#skip_space ⇒ Object
Returns the value of attribute skip_space.
Class Method Summary collapse
- .debug? ⇒ Boolean
-
.tokenize(ruby, options) ⇒ Object
Returns an Array of
ruby
tokens.
Instance Method Summary collapse
- #each_top_level_statement ⇒ Object
- #eof? ⇒ Boolean
- #get_readed ⇒ Object
- #getc ⇒ Object
- #getc_of_rests ⇒ Object
- #gets ⇒ Object
- #identify_comment ⇒ Object
- #identify_gvar ⇒ Object
- #identify_here_document ⇒ Object
- #identify_identifier ⇒ Object
- #identify_number(op = "") ⇒ Object
- #identify_quotation ⇒ Object
- #identify_string(ltype, quoted = ltype, type = nil) ⇒ Object
-
#initialize(content, options) ⇒ RubyLex
constructor
Creates a new lexer for
content
. - #initialize_input ⇒ Object
-
#inspect ⇒ Object
:stopdoc:.
- #lex ⇒ Object
- #lex_init ⇒ Object
- #lex_int2 ⇒ Object
- #peek(i = 0) ⇒ Object
- #peek_equal?(str) ⇒ Boolean
- #peek_match?(regexp) ⇒ Boolean
- #prompt ⇒ Object
- #read_escape ⇒ Object
-
#set_input(io, p = nil, &block) ⇒ Object
io functions.
- #set_prompt(p = nil, &block) ⇒ Object
- #skip_inner_expression ⇒ Object
- #token ⇒ Object
- #ungetc(c = nil) ⇒ Object
Methods included from RubyToken
#Token, def_token, #set_token_position
Constructor Details
#initialize(content, options) ⇒ RubyLex
Creates a new lexer for content
. options
is an RDoc::Options, only +tab_width is used.
82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 |
# File 'lib/rdoc/ruby_lex.rb', line 82 def initialize(content, ) lex_init if /\t/ =~ content then tab_width = .tab_width content = content.split(/\n/).map do |line| 1 while line.gsub!(/\t+/) { ' ' * (tab_width*$&.length - $`.length % tab_width) } && $~ line end.join("\n") end content << "\n" unless content[-1, 1] == "\n" set_input StringIO.new content @base_char_no = 0 @char_no = 0 @exp_line_no = @line_no = 1 @here_readed = [] @readed = [] @rests = [] @seek = 0 @here_header = false @indent = 0 @indent_stack = [] @lex_state = :EXPR_BEG @space_seen = false @continue = false @line = "" @skip_space = false @readed_auto_clean_up = false @exception_on_syntax_error = true @prompt = nil @prev_seek = nil @ltype = nil end |
Class Attribute Details
.debug_level ⇒ Object
Returns the value of attribute debug_level.
50 51 52 |
# File 'lib/rdoc/ruby_lex.rb', line 50 def debug_level @debug_level end |
Instance Attribute Details
#char_no ⇒ Object (readonly)
Returns the value of attribute char_no.
139 140 141 |
# File 'lib/rdoc/ruby_lex.rb', line 139 def char_no @char_no end |
#continue ⇒ Object
Returns the value of attribute continue.
45 46 47 |
# File 'lib/rdoc/ruby_lex.rb', line 45 def continue @continue end |
#exception_on_syntax_error ⇒ Object
Returns the value of attribute exception_on_syntax_error.
136 137 138 |
# File 'lib/rdoc/ruby_lex.rb', line 136 def exception_on_syntax_error @exception_on_syntax_error end |
#indent ⇒ Object (readonly)
Returns the value of attribute indent.
141 142 143 |
# File 'lib/rdoc/ruby_lex.rb', line 141 def indent @indent end |
#lex_state ⇒ Object
Returns the value of attribute lex_state.
46 47 48 |
# File 'lib/rdoc/ruby_lex.rb', line 46 def lex_state @lex_state end |
#line_no ⇒ Object (readonly)
Returns the value of attribute line_no.
140 141 142 |
# File 'lib/rdoc/ruby_lex.rb', line 140 def line_no @line_no end |
#readed_auto_clean_up ⇒ Object
Returns the value of attribute readed_auto_clean_up.
135 136 137 |
# File 'lib/rdoc/ruby_lex.rb', line 135 def readed_auto_clean_up @readed_auto_clean_up end |
#reader ⇒ Object (readonly)
Returns the value of attribute reader.
47 48 49 |
# File 'lib/rdoc/ruby_lex.rb', line 47 def reader @reader end |
#seek ⇒ Object (readonly)
Returns the value of attribute seek.
138 139 140 |
# File 'lib/rdoc/ruby_lex.rb', line 138 def seek @seek end |
#skip_space ⇒ Object
Returns the value of attribute skip_space.
134 135 136 |
# File 'lib/rdoc/ruby_lex.rb', line 134 def skip_space @skip_space end |
Class Method Details
.debug? ⇒ Boolean
53 54 55 |
# File 'lib/rdoc/ruby_lex.rb', line 53 def self.debug? @debug_level > 0 end |
.tokenize(ruby, options) ⇒ Object
Returns an Array of ruby
tokens. See ::new for a description of options
.
65 66 67 68 69 70 71 72 73 74 75 76 |
# File 'lib/rdoc/ruby_lex.rb', line 65 def self.tokenize ruby, tokens = [] scanner = RDoc::RubyLex.new ruby, scanner.exception_on_syntax_error = true while token = scanner.token do tokens << token end tokens end |
Instance Method Details
#each_top_level_statement ⇒ Object
294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 |
# File 'lib/rdoc/ruby_lex.rb', line 294 def each_top_level_statement initialize_input catch(:TERM_INPUT) do loop do begin @continue = false prompt unless l = lex throw :TERM_INPUT if @line == '' else #p l @line.concat l if @ltype or @continue or @indent > 0 next end end if @line != "\n" yield @line, @exp_line_no end break unless l @line = '' @exp_line_no = @line_no @indent = 0 @indent_stack = [] prompt rescue TerminateLineInput initialize_input prompt get_readed end end end end |
#eof? ⇒ Boolean
199 200 201 |
# File 'lib/rdoc/ruby_lex.rb', line 199 def eof? @io.eof? end |
#get_readed ⇒ Object
155 156 157 158 159 160 161 162 163 164 165 |
# File 'lib/rdoc/ruby_lex.rb', line 155 def get_readed if idx = @readed.rindex("\n") @base_char_no = @readed.size - (idx + 1) else @base_char_no += @readed.size end readed = @readed.join("") @readed = [] readed end |
#getc ⇒ Object
167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 |
# File 'lib/rdoc/ruby_lex.rb', line 167 def getc while @rests.empty? # return nil unless buf_input @rests.push nil unless buf_input end c = @rests.shift if @here_header @here_readed.push c else @readed.push c end @seek += 1 if c == "\n" @line_no += 1 @char_no = 0 else @char_no += 1 end c end |
#getc_of_rests ⇒ Object
203 204 205 206 207 208 209 |
# File 'lib/rdoc/ruby_lex.rb', line 203 def getc_of_rests if @rests.empty? nil else getc end end |
#gets ⇒ Object
189 190 191 192 193 194 195 196 197 |
# File 'lib/rdoc/ruby_lex.rb', line 189 def gets l = "" while c = getc l.concat(c) break if c == "\n" end return nil if l == "" and c.nil? l end |
#identify_comment ⇒ Object
1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 |
# File 'lib/rdoc/ruby_lex.rb', line 1266 def identify_comment @ltype = "#" comment = '#' while ch = getc # if ch == "\\" #" # read_escape # end if ch == "\n" @ltype = nil ungetc break end comment << ch end return Token(TkCOMMENT, comment) end |
#identify_gvar ⇒ Object
834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 |
# File 'lib/rdoc/ruby_lex.rb', line 834 def identify_gvar @lex_state = :EXPR_END case ch = getc when /[~_*$?!@\/\\;,=:<>".]/ #" Token(TkGVAR, "$" + ch) when "-" Token(TkGVAR, "$-" + getc) when "&", "`", "'", "+" Token(TkBACK_REF, "$"+ch) when /[1-9]/ ref = ch while (ch = getc) =~ /[0-9]/ do ref << ch end ungetc Token(TkNTH_REF, "$#{ref}") when /\w/ ungetc ungetc identify_identifier else ungetc Token("$") end end |
#identify_here_document ⇒ Object
979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 |
# File 'lib/rdoc/ruby_lex.rb', line 979 def identify_here_document ch = getc # if lt = PERCENT_LTYPE[ch] if ch == "-" ch = getc indent = true end if /['"`]/ =~ ch user_quote = lt = ch quoted = "" while (c = getc) && c != lt quoted.concat c end else user_quote = nil lt = '"' quoted = ch.dup while (c = getc) && c =~ /\w/ quoted.concat c end ungetc end ltback, @ltype = @ltype, lt reserve = [] while ch = getc reserve.push ch if ch == "\\" reserve.push ch = getc elsif ch == "\n" break end end output_heredoc = reserve.join =~ /\A\r?\n\z/ if output_heredoc then doc = '<<' doc << '-' if indent doc << "#{user_quote}#{quoted}#{user_quote}\n" else doc = '"' end @here_header = false while l = gets l = l.sub(/(:?\r)?\n\z/, "\n") if (indent ? l.strip : l.chomp) == quoted break end doc << l end if output_heredoc then raise Error, "Missing terminating #{quoted} for string" unless l doc << l.chomp else doc << '"' end @here_header = true @here_readed.concat reserve while ch = reserve.pop ungetc ch end token_class = output_heredoc ? RDoc::RubyLex::TkHEREDOC : Ltype2Token[lt] @ltype = ltback @lex_state = :EXPR_END Token(token_class, doc) end |
#identify_identifier ⇒ Object
865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 |
# File 'lib/rdoc/ruby_lex.rb', line 865 def identify_identifier token = "" if peek(0) =~ /[$@]/ token.concat(c = getc) if c == "@" and peek(0) == "@" token.concat getc end end while (ch = getc) =~ IDENT_RE do print " :#{ch}: " if RDoc::RubyLex.debug? token.concat ch end ungetc if (ch == "!" || ch == "?") && token[0,1] =~ /\w/ && peek(0) != "=" token.concat getc end # almost fix token case token when /^\$/ return Token(TkGVAR, token) when /^\@\@/ @lex_state = :EXPR_END # p Token(TkCVAR, token) return Token(TkCVAR, token) when /^\@/ @lex_state = :EXPR_END return Token(TkIVAR, token) end if @lex_state != :EXPR_DOT print token, "\n" if RDoc::RubyLex.debug? token_c, *trans = TkReading2Token[token] if token_c # reserved word? if (@lex_state != :EXPR_BEG && @lex_state != :EXPR_FNAME && trans[1]) # modifiers token_c = TkSymbol2Token[trans[1]] @lex_state = trans[0] else if @lex_state != :EXPR_FNAME if ENINDENT_CLAUSE.include?(token) valid = peek(0) != ':' # check for ``class = val'' etc. case token when "class" valid = false unless peek_match?(/^\s*(<<|\w|::)/) when "def" valid = false if peek_match?(/^\s*(([+-\/*&\|^]|<<|>>|\|\||\&\&)=|\&\&|\|\|)/) when "do" valid = false if peek_match?(/^\s*([+-\/*]?=|\*|<|>|\&)/) when *ENINDENT_CLAUSE valid = false if peek_match?(/^\s*([+-\/*]?=|\*|<|>|\&|\|)/) else # no nothing end if valid if valid if token == "do" if ![TkFOR, TkWHILE, TkUNTIL].include?(@indent_stack.last) @indent += 1 @indent_stack.push token_c end else @indent += 1 @indent_stack.push token_c end else token_c = TkIDENTIFIER end elsif DEINDENT_CLAUSE.include?(token) @indent -= 1 @indent_stack.pop end @lex_state = trans[0] else @lex_state = :EXPR_END end end return Token(token_c, token) end end if @lex_state == :EXPR_FNAME @lex_state = :EXPR_END if peek(0) == '=' token.concat getc end elsif @lex_state == :EXPR_BEG || @lex_state == :EXPR_DOT || @lex_state == :EXPR_ARG @lex_state = :EXPR_ARG else @lex_state = :EXPR_END end if token[0, 1] =~ /[A-Z]/ return Token(TkCONSTANT, token) elsif token[token.size - 1, 1] =~ /[!?]/ return Token(TkFID, token) else return Token(TkIDENTIFIER, token) end end |
#identify_number(op = "") ⇒ Object
1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 |
# File 'lib/rdoc/ruby_lex.rb', line 1071 def identify_number(op = "") @lex_state = :EXPR_END num = op if peek(0) == "0" && peek(1) !~ /[.eE]/ num << getc case peek(0) when /[xX]/ ch = getc match = /[0-9a-fA-F_]/ when /[bB]/ ch = getc match = /[01_]/ when /[oO]/ ch = getc match = /[0-7_]/ when /[dD]/ ch = getc match = /[0-9_]/ when /[0-7]/ match = /[0-7_]/ when /[89]/ raise Error, "Illegal octal digit" else return Token(TkINTEGER, num) end num << ch if ch len0 = true non_digit = false while ch = getc num << ch if match =~ ch if ch == "_" if non_digit raise Error, "trailing `#{ch}' in number" else non_digit = ch end else non_digit = false len0 = false end else ungetc num[-1, 1] = '' if len0 raise Error, "numeric literal without digits" end if non_digit raise Error, "trailing `#{non_digit}' in number" end break end end return Token(TkINTEGER, num) end type = TkINTEGER allow_point = true allow_e = true non_digit = false while ch = getc num << ch case ch when /[0-9]/ non_digit = false when "_" non_digit = ch when allow_point && "." if non_digit raise Error, "trailing `#{non_digit}' in number" end type = TkFLOAT if peek(0) !~ /[0-9]/ type = TkINTEGER ungetc num[-1, 1] = '' break end allow_point = false when allow_e && "e", allow_e && "E" if non_digit raise Error, "trailing `#{non_digit}' in number" end type = TkFLOAT if peek(0) =~ /[+-]/ num << getc end allow_e = false allow_point = false non_digit = ch else if non_digit raise Error, "trailing `#{non_digit}' in number" end ungetc num[-1, 1] = '' break end end Token(type, num) end |
#identify_quotation ⇒ Object
1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 |
# File 'lib/rdoc/ruby_lex.rb', line 1052 def identify_quotation type = ch = getc if lt = PERCENT_LTYPE[type] ch = getc elsif type =~ /\W/ type = nil lt = "\"" else return Token(TkMOD, '%') end # if ch !~ /\W/ # ungetc # next # end #@ltype = lt @quoted = ch unless @quoted = PERCENT_PAREN[ch] identify_string(lt, @quoted, type) end |
#identify_string(ltype, quoted = ltype, type = nil) ⇒ Object
1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 |
# File 'lib/rdoc/ruby_lex.rb', line 1179 def identify_string(ltype, quoted = ltype, type = nil) close = PERCENT_PAREN.values.include?(quoted) @ltype = ltype @quoted = quoted str = if ltype == quoted and %w[" ' /].include? ltype then ltype.dup elsif RUBY_VERSION > '1.9' then "%#{type or PERCENT_LTYPE.key ltype}#{PERCENT_PAREN_REV[quoted]||quoted}" else "%#{type or PERCENT_LTYPE.index ltype}#{PERCENT_PAREN_REV[quoted]||quoted}" end subtype = nil begin nest = 0 while ch = getc str << ch if @quoted == ch and nest <= 0 break elsif @ltype != "'" && @ltype != "]" && @ltype != ":" and ch == "#" ch = getc subtype = true if ch == "{" then str << ch << skip_inner_expression next else ungetc end elsif ch == '\\' if %w[' /].include? @ltype then case ch = getc when "\\", "\n", "'" when @ltype str << ch else ungetc end else str << read_escape end end if close then if PERCENT_PAREN[ch] == @quoted nest += 1 elsif ch == @quoted nest -= 1 end end end if @ltype == "/" while peek(0) =~ /i|m|x|o|e|s|u|n/ str << getc end end if subtype Token(DLtype2Token[ltype], str) else Token(Ltype2Token[ltype], str) end ensure @ltype = nil @quoted = nil @lex_state = :EXPR_END end end |
#initialize_input ⇒ Object
278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 |
# File 'lib/rdoc/ruby_lex.rb', line 278 def initialize_input @ltype = nil @quoted = nil @indent = 0 @indent_stack = [] @lex_state = :EXPR_BEG @space_seen = false @here_header = false @continue = false prompt @line = "" @exp_line_no = @line_no end |
#inspect ⇒ Object
:stopdoc:
127 128 129 130 131 132 |
# File 'lib/rdoc/ruby_lex.rb', line 127 def inspect # :nodoc: "#<%s:0x%x pos %d lex_state %p space_seen %p>" % [ self.class, object_id, @io.pos, @lex_state, @space_seen, ] end |
#lex ⇒ Object
329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 |
# File 'lib/rdoc/ruby_lex.rb', line 329 def lex until (((tk = token).kind_of?(TkNL) || tk.kind_of?(TkEND_OF_SCRIPT)) && !@continue or tk.nil?) #p tk #p @lex_state #p self end line = get_readed # print self.inspect if line == "" and tk.kind_of?(TkEND_OF_SCRIPT) || tk.nil? nil else line end end |
#lex_init ⇒ Object
412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 |
# File 'lib/rdoc/ruby_lex.rb', line 412 def lex_init() @OP = IRB::SLex.new @OP.def_rules("\0", "\004", "\032") do |op, io| Token(TkEND_OF_SCRIPT, '') end @OP.def_rules(" ", "\t", "\f", "\r", "\13") do |op, io| @space_seen = true str = op while (ch = getc) =~ /[ \t\f\r\13]/ do str << ch end ungetc Token TkSPACE, str end @OP.def_rule("#") do |op, io| identify_comment end @OP.def_rule("=begin", proc{|op, io| @prev_char_no == 0 && peek(0) =~ /\s/}) do |op, io| @ltype = "=" res = '' nil until getc == "\n" until ( peek_equal?("=end") && peek(4) =~ /\s/ ) do (ch = getc) res << ch end gets # consume =end @ltype = nil Token(TkRD_COMMENT, res) end @OP.def_rule("\n") do |op, io| print "\\n\n" if RDoc::RubyLex.debug? case @lex_state when :EXPR_BEG, :EXPR_FNAME, :EXPR_DOT @continue = true else @continue = false @lex_state = :EXPR_BEG until (@indent_stack.empty? || [TkLPAREN, TkLBRACK, TkLBRACE, TkfLPAREN, TkfLBRACK, TkfLBRACE].include?(@indent_stack.last)) @indent_stack.pop end end @here_header = false @here_readed = [] Token(TkNL) end @OP.def_rules("*", "**", "=", "==", "===", "=~", "<=>", "<", "<=", ">", ">=", ">>") do |op, io| case @lex_state when :EXPR_FNAME, :EXPR_DOT @lex_state = :EXPR_ARG else @lex_state = :EXPR_BEG end Token(op) end @OP.def_rules("!", "!=", "!~") do |op, io| @lex_state = :EXPR_BEG Token(op) end @OP.def_rules("<<") do |op, io| tk = nil if @lex_state != :EXPR_END && @lex_state != :EXPR_CLASS && (@lex_state != :EXPR_ARG || @space_seen) c = peek(0) if /\S/ =~ c && (/["'`]/ =~ c || /\w/ =~ c || c == "-") tk = identify_here_document end end unless tk tk = Token(op) case @lex_state when :EXPR_FNAME, :EXPR_DOT @lex_state = :EXPR_ARG else @lex_state = :EXPR_BEG end end tk end @OP.def_rules("'", '"') do |op, io| identify_string(op) end @OP.def_rules("`") do |op, io| if @lex_state == :EXPR_FNAME @lex_state = :EXPR_END Token(op) else identify_string(op) end end @OP.def_rules('?') do |op, io| if @lex_state == :EXPR_END @lex_state = :EXPR_BEG Token(TkQUESTION) else ch = getc if @lex_state == :EXPR_ARG && ch =~ /\s/ ungetc @lex_state = :EXPR_BEG; Token(TkQUESTION) else @lex_state = :EXPR_END Token(TkCHAR, "?#{ch}") end end end @OP.def_rules("&", "&&", "|", "||") do |op, io| @lex_state = :EXPR_BEG Token(op) end @OP.def_rules("+=", "-=", "*=", "**=", "&=", "|=", "^=", "<<=", ">>=", "||=", "&&=") do |op, io| @lex_state = :EXPR_BEG op =~ /^(.*)=$/ Token(TkOPASGN, $1) end @OP.def_rule("+@", proc{|op, io| @lex_state == :EXPR_FNAME}) do |op, io| @lex_state = :EXPR_ARG Token(op) end @OP.def_rule("-@", proc{|op, io| @lex_state == :EXPR_FNAME}) do |op, io| @lex_state = :EXPR_ARG Token(op) end @OP.def_rules("+", "-") do |op, io| catch(:RET) do if @lex_state == :EXPR_ARG if @space_seen and peek(0) =~ /[0-9]/ throw :RET, identify_number(op) else @lex_state = :EXPR_BEG end elsif @lex_state != :EXPR_END and peek(0) =~ /[0-9]/ throw :RET, identify_number(op) else @lex_state = :EXPR_BEG end Token(op) end end @OP.def_rule(".") do |op, io| @lex_state = :EXPR_BEG if peek(0) =~ /[0-9]/ ungetc identify_number else # for "obj.if" etc. @lex_state = :EXPR_DOT Token(TkDOT) end end @OP.def_rules("..", "...") do |op, io| @lex_state = :EXPR_BEG Token(op) end lex_int2 end |
#lex_int2 ⇒ Object
611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 |
# File 'lib/rdoc/ruby_lex.rb', line 611 def lex_int2 @OP.def_rules("]", "}", ")") do |op, io| @lex_state = :EXPR_END @indent -= 1 @indent_stack.pop Token(op) end @OP.def_rule(":") do |op, io| if @lex_state == :EXPR_END || peek(0) =~ /\s/ @lex_state = :EXPR_BEG Token(TkCOLON) else @lex_state = :EXPR_FNAME; Token(TkSYMBEG) end end @OP.def_rule("::") do |op, io| # p @lex_state.id2name, @space_seen if @lex_state == :EXPR_BEG or @lex_state == :EXPR_ARG && @space_seen @lex_state = :EXPR_BEG Token(TkCOLON3) else @lex_state = :EXPR_DOT Token(TkCOLON2) end end @OP.def_rule("/") do |op, io| if @lex_state == :EXPR_BEG || @lex_state == :EXPR_MID identify_string(op) elsif peek(0) == '=' getc @lex_state = :EXPR_BEG Token(TkOPASGN, "/") #/) elsif @lex_state == :EXPR_ARG and @space_seen and peek(0) !~ /\s/ identify_string(op) else @lex_state = :EXPR_BEG Token("/") #/) end end @OP.def_rules("^") do |op, io| @lex_state = :EXPR_BEG Token("^") end # @OP.def_rules("^=") do # @lex_state = :EXPR_BEG # Token(OP_ASGN, :^) # end @OP.def_rules(",") do |op, io| @lex_state = :EXPR_BEG Token(op) end @OP.def_rules(";") do |op, io| @lex_state = :EXPR_BEG until (@indent_stack.empty? || [TkLPAREN, TkLBRACK, TkLBRACE, TkfLPAREN, TkfLBRACK, TkfLBRACE].include?(@indent_stack.last)) @indent_stack.pop end Token(op) end @OP.def_rule("~") do |op, io| @lex_state = :EXPR_BEG Token("~") end @OP.def_rule("~@", proc{|op, io| @lex_state == :EXPR_FNAME}) do |op, io| @lex_state = :EXPR_BEG Token("~") end @OP.def_rule("(") do |op, io| @indent += 1 if @lex_state == :EXPR_BEG || @lex_state == :EXPR_MID @lex_state = :EXPR_BEG tk_c = TkfLPAREN else @lex_state = :EXPR_BEG tk_c = TkLPAREN end @indent_stack.push tk_c Token tk_c end @OP.def_rule("[]", proc{|op, io| @lex_state == :EXPR_FNAME}) do |op, io| @lex_state = :EXPR_ARG Token("[]") end @OP.def_rule("[]=", proc{|op, io| @lex_state == :EXPR_FNAME}) do |op, io| @lex_state = :EXPR_ARG Token("[]=") end @OP.def_rule("[") do |op, io| @indent += 1 if @lex_state == :EXPR_FNAME tk_c = TkfLBRACK else if @lex_state == :EXPR_BEG || @lex_state == :EXPR_MID tk_c = TkLBRACK elsif @lex_state == :EXPR_ARG && @space_seen tk_c = TkLBRACK else tk_c = TkfLBRACK end @lex_state = :EXPR_BEG end @indent_stack.push tk_c Token(tk_c) end @OP.def_rule("{") do |op, io| @indent += 1 if @lex_state != :EXPR_END && @lex_state != :EXPR_ARG tk_c = TkLBRACE else tk_c = TkfLBRACE end @lex_state = :EXPR_BEG @indent_stack.push tk_c Token(tk_c) end @OP.def_rule('\\') do |op, io| if getc == "\n" @space_seen = true @continue = true Token(TkSPACE) else ungetc Token("\\") end end @OP.def_rule('%') do |op, io| if @lex_state == :EXPR_BEG || @lex_state == :EXPR_MID identify_quotation elsif peek(0) == '=' getc Token(TkOPASGN, :%) elsif @lex_state == :EXPR_ARG and @space_seen and peek(0) !~ /\s/ identify_quotation else @lex_state = :EXPR_BEG Token("%") #)) end end @OP.def_rule('$') do |op, io| identify_gvar end @OP.def_rule('@') do |op, io| if peek(0) =~ /[\w@]/ ungetc identify_identifier else Token("@") end end # @OP.def_rule("def", proc{|op, io| /\s/ =~ io.peek(0)}) do # |op, io| # @indent += 1 # @lex_state = :EXPR_FNAME # # @lex_state = :EXPR_END # # until @rests[0] == "\n" or @rests[0] == ";" # # rests.shift # # end # end @OP.def_rule("_") do if peek_match?(/_END__/) and @lex_state == :EXPR_BEG then 6.times { getc } Token(TkEND_OF_SCRIPT, '__END__') else ungetc identify_identifier end end @OP.def_rule("") do |op, io| printf "MATCH: start %s: %s\n", op, io.inspect if RDoc::RubyLex.debug? if peek(0) =~ /[0-9]/ t = identify_number else t = identify_identifier end printf "MATCH: end %s: %s\n", op, io.inspect if RDoc::RubyLex.debug? t end p @OP if RDoc::RubyLex.debug? end |
#peek(i = 0) ⇒ Object
247 248 249 250 251 252 |
# File 'lib/rdoc/ruby_lex.rb', line 247 def peek(i = 0) while @rests.size <= i return nil unless buf_input end @rests[i] end |
#peek_equal?(str) ⇒ Boolean
232 233 234 235 236 237 238 |
# File 'lib/rdoc/ruby_lex.rb', line 232 def peek_equal?(str) chrs = str.split(//) until @rests.size >= chrs.size return false unless buf_input end @rests[0, chrs.size] == chrs end |
#peek_match?(regexp) ⇒ Boolean
240 241 242 243 244 245 |
# File 'lib/rdoc/ruby_lex.rb', line 240 def peek_match?(regexp) while @rests.empty? return false unless buf_input end regexp =~ @rests.join("") end |
#prompt ⇒ Object
272 273 274 275 276 |
# File 'lib/rdoc/ruby_lex.rb', line 272 def prompt if @prompt @prompt.call(@ltype, @indent, @continue, @line_no) end end |
#read_escape ⇒ Object
1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 |
# File 'lib/rdoc/ruby_lex.rb', line 1287 def read_escape escape = '' ch = getc case ch when "\n", "\r", "\f" escape << ch when "\\", "n", "t", "r", "f", "v", "a", "e", "b", "s" #" escape << ch when /[0-7]/ ungetc ch 3.times do ch = getc case ch when /[0-7]/ escape << ch when nil break else ungetc break end end when "x" escape << ch 2.times do ch = getc case ch when /[0-9a-fA-F]/ escape << ch when nil break else ungetc break end end when "M" escape << ch ch = getc if ch != '-' ungetc else escape << ch ch = getc if ch == "\\" #" ungetc escape << read_escape else escape << ch end end when "C", "c" #, "^" escape << ch if ch == "C" ch = getc if ch == "-" escape << ch ch = getc escape << ch escape << read_escape if ch == "\\" else ungetc end elsif (ch = getc) == "\\" #" escape << ch << read_escape end else escape << ch # other characters end escape end |
#set_input(io, p = nil, &block) ⇒ Object
io functions
144 145 146 147 148 149 150 151 152 153 |
# File 'lib/rdoc/ruby_lex.rb', line 144 def set_input(io, p = nil, &block) @io = io if p.respond_to?(:call) @input = p elsif block_given? @input = block else @input = Proc.new{@io.gets} end end |
#set_prompt(p = nil, &block) ⇒ Object
263 264 265 266 267 268 269 270 |
# File 'lib/rdoc/ruby_lex.rb', line 263 def set_prompt(p = nil, &block) p = block if block_given? if p.respond_to?(:call) @prompt = p else @prompt = Proc.new{print p} end end |
#skip_inner_expression ⇒ Object
1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 |
# File 'lib/rdoc/ruby_lex.rb', line 1251 def skip_inner_expression res = "" nest = 0 while ch = getc res << ch if ch == '}' break if nest.zero? nest -= 1 elsif ch == '{' nest += 1 end end res end |
#token ⇒ Object
346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 |
# File 'lib/rdoc/ruby_lex.rb', line 346 def token # require "tracer" # Tracer.on @prev_seek = @seek @prev_line_no = @line_no @prev_char_no = @char_no begin begin tk = @OP.match(self) @space_seen = tk.kind_of?(TkSPACE) rescue SyntaxError => e raise Error, "syntax error: #{e.}" if @exception_on_syntax_error tk = TkError.new(@seek, @line_no, @char_no) end end while @skip_space and tk.kind_of?(TkSPACE) if @readed_auto_clean_up get_readed end # Tracer.off tk end |
#ungetc(c = nil) ⇒ Object
211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 |
# File 'lib/rdoc/ruby_lex.rb', line 211 def ungetc(c = nil) if @here_readed.empty? c2 = @readed.pop else c2 = @here_readed.pop end c = c2 unless c @rests.unshift c #c = @seek -= 1 if c == "\n" @line_no -= 1 if idx = @readed.rindex("\n") @char_no = idx + 1 else @char_no = @base_char_no + @readed.size end else @char_no -= 1 end end |