Class: RubyLexer
- Inherits:
-
Object
- Object
- RubyLexer
- Defined in:
- lib/ruby_lexer.rex.rb,
lib/ruby_lexer.rb,
lib/ruby_lexer.rb
Overview
lexical scanner definition for ruby
Defined Under Namespace
Classes: ScanError
Constant Summary collapse
- RUBY19 =
:stopdoc:
"".respond_to? :encoding
- IDENT_CHAR =
if RUBY19 then /[\w\u0080-\u{10ffff}]/u else /[\w\x80-\xFF]/n end
- EOF =
:eof_haha!
- STR_FUNC_BORING =
ruby constants for strings (should this be moved somewhere else?)
0x00
- STR_FUNC_ESCAPE =
TODO: remove and replace with REGEXP
0x01
- STR_FUNC_EXPAND =
0x02
- STR_FUNC_REGEXP =
0x04
- STR_FUNC_QWORDS =
0x08
- STR_FUNC_SYMBOL =
0x10
- STR_FUNC_INDENT =
<<-HEREDOC
0x20
- STR_SQUOTE =
STR_FUNC_BORING
- STR_DQUOTE =
STR_FUNC_BORING | STR_FUNC_EXPAND
- STR_XQUOTE =
STR_FUNC_BORING | STR_FUNC_EXPAND
- STR_REGEXP =
STR_FUNC_REGEXP | STR_FUNC_ESCAPE | STR_FUNC_EXPAND
- STR_SSYM =
STR_FUNC_SYMBOL
- STR_DSYM =
STR_FUNC_SYMBOL | STR_FUNC_EXPAND
- ESCAPES =
{ "a" => "\007", "b" => "\010", "e" => "\033", "f" => "\f", "n" => "\n", "r" => "\r", "s" => " ", "t" => "\t", "v" => "\13", "\\" => '\\', "\n" => "", "C-\?" => 127.chr, "c\?" => 127.chr, }
- TOKENS =
{ "!" => :tBANG, "!=" => :tNEQ, # "!@" => :tUBANG, "!~" => :tNMATCH, "," => :tCOMMA, ".." => :tDOT2, "..." => :tDOT3, "=" => :tEQL, "==" => :tEQ, "===" => :tEQQ, "=>" => :tASSOC, "=~" => :tMATCH, "->" => :tLAMBDA, }
- IDENT =
/^#{IDENT_CHAR}+/o
- ESC =
/\\((?>[0-7]{1,3}|x[0-9a-fA-F]{1,2}|M-[^\\]|(C-|c)[^\\]|u[0-9a-fA-F]+|u\{[0-9a-fA-F]+\}|[^0-7xMCc]))/
- SIMPLE_STRING =
/(#{ESC}|\#(#{ESC}|[^\{\#\@\$\"\\])|[^\"\\\#])*/o
- SSTRING =
/(\\.|[^\'])*/
- INT_DEC =
/[+]?(?:(?:[1-9][\d_]*|0)(?!\.\d)\b|0d[0-9_]+)/i
- INT_HEX =
/[+]?0x[a-f0-9_]+/i
- INT_BIN =
/[+]?0b[01_]+/i
- INT_OCT =
/[+]?0o?[0-7_]+|0o/i
- FLOAT =
/[+]?\d[\d_]*\.[\d_]+(e[+-]?[\d_]+)?\b|[+]?[\d_]+e[+-]?[\d_]+\b/i
- INT_DEC2 =
/[+]?\d[0-9_]*(?![e])/i
- NUM_BAD =
/[+]?0[xbd]\b/i
- INT_OCT_BAD =
/[+]?0o?[0-7_]*[89]/i
- FLOAT_BAD =
/[+]?\d[\d_]*_(e|\.)/i
- @@regexp_cache =
Hash.new { |h,k| h[k] = Regexp.new(Regexp.escape(k)) }
Instance Attribute Summary collapse
-
#brace_nest ⇒ Object
Returns the value of attribute brace_nest.
-
#cmdarg ⇒ Object
Returns the value of attribute cmdarg.
-
#command_start ⇒ Object
Returns the value of attribute command_start.
-
#command_state ⇒ Object
Returns the value of attribute command_state.
-
#comments ⇒ Object
TODO: remove this…
-
#cond ⇒ Object
Returns the value of attribute cond.
-
#extra_lineno ⇒ Object
Returns the value of attribute extra_lineno.
-
#filename ⇒ Object
Returns the value of attribute filename.
-
#last_state ⇒ Object
Returns the value of attribute last_state.
-
#lex_state ⇒ Object
Additional context surrounding tokens that both the lexer and grammar use.
-
#lex_strterm ⇒ Object
Returns the value of attribute lex_strterm.
-
#lineno ⇒ Object
:startdoc:.
-
#lpar_beg ⇒ Object
Returns the value of attribute lpar_beg.
-
#paren_nest ⇒ Object
Returns the value of attribute paren_nest.
-
#parser ⇒ Object
HACK for very end of lexer…
-
#space_seen ⇒ Object
Returns the value of attribute space_seen.
-
#ss ⇒ Object
(also: #match)
Returns the value of attribute ss.
-
#state ⇒ Object
Returns the value of attribute state.
-
#string_buffer ⇒ Object
Returns the value of attribute string_buffer.
-
#string_nest ⇒ Object
Returns the value of attribute string_nest.
-
#token ⇒ Object
Last token read via next_token.
-
#version ⇒ Object
What version of ruby to parse.
Instance Method Summary collapse
- #action ⇒ Object
- #arg_ambiguous ⇒ Object
- #arg_state ⇒ Object
- #beginning_of_line? ⇒ Boolean (also: #bol?)
- #check(re) ⇒ Object
- #d(o) ⇒ Object
- #end_of_stream? ⇒ Boolean
- #expr_dot? ⇒ Boolean
- #expr_fname? ⇒ Boolean
- #expr_result(token, text) ⇒ Object
-
#heredoc(here) ⇒ Object
TODO: rewrite / remove.
-
#heredoc_identifier ⇒ Object
TODO: remove / rewrite.
-
#in_arg_state? ⇒ Boolean
TODO: rename is_after_operator?.
- #in_fname? ⇒ Boolean
- #in_lex_state?(*states) ⇒ Boolean
-
#initialize(v = 18) ⇒ RubyLexer
constructor
A new instance of RubyLexer.
- #int_with_base(base) ⇒ Object
- #is_arg? ⇒ Boolean
- #is_beg? ⇒ Boolean
- #is_end? ⇒ Boolean
- #is_label_possible? ⇒ Boolean
- #is_label_suffix? ⇒ Boolean
- #is_space_arg?(c = "x") ⇒ Boolean
- #matched ⇒ Object
- #matches ⇒ Object
- #next_token ⇒ Object
- #not_end? ⇒ Boolean
-
#old_lineno= ⇒ Object
:startdoc:.
- #parse(str) ⇒ Object
- #parse_file(path) ⇒ Object
-
#parse_quote ⇒ Object
TODO: remove / rewrite.
-
#parse_string(quote) ⇒ Object
TODO: rewrite / remove.
- #process_amper(text) ⇒ Object
- #process_backref(text) ⇒ Object
- #process_begin(text) ⇒ Object
- #process_bracing(text) ⇒ Object
- #process_colon1(text) ⇒ Object
- #process_colon2(text) ⇒ Object
- #process_curly_brace(text) ⇒ Object
- #process_float(text) ⇒ Object
- #process_gvar(text) ⇒ Object
- #process_gvar_oddity(text) ⇒ Object
- #process_ivar(text) ⇒ Object
- #process_label(text) ⇒ Object
- #process_label_or_string(text) ⇒ Object
- #process_lchevron(text) ⇒ Object
- #process_newline_or_comment(text) ⇒ Object
- #process_nthref(text) ⇒ Object
- #process_paren(text) ⇒ Object
- #process_paren18 ⇒ Object
- #process_paren19 ⇒ Object
- #process_percent(text) ⇒ Object
- #process_plus_minus(text) ⇒ Object
- #process_questionmark(text) ⇒ Object
- #process_slash(text) ⇒ Object
- #process_square_bracket(text) ⇒ Object
-
#process_string ⇒ Object
TODO: rewrite / remove.
- #process_symbol(text) ⇒ Object
- #process_token(text) ⇒ Object
- #process_token_keyword(keyword) ⇒ Object
- #process_underscore(text) ⇒ Object
- #rb_compile_error(msg) ⇒ Object
-
#read_escape ⇒ Object
TODO: remove / rewrite.
-
#regx_options ⇒ Object
TODO: rewrite / remove.
- #reset ⇒ Object
-
#result(lex_state, token, text) ⇒ Object
:nodoc:.
- #ruby18 ⇒ Object
- #ruby19 ⇒ Object
- #ruby22? ⇒ Boolean
- #ruby22_label? ⇒ Boolean
- #scan(re) ⇒ Object
-
#scanner_class ⇒ Object
TODO: design this out of oedipus_lex.
- #space_vs_beginning(space_type, beg_type, fallback) ⇒ Object
- #string(type, beg = matched, nnd = "\0") ⇒ Object
-
#tokadd_escape(term) ⇒ Object
TODO: consider def src= src raise “bad src: #srcsrc.inspect” unless String === src @src = RPStringScanner.new(src) end.
-
#tokadd_string(func, term, paren) ⇒ Object
TODO: rewrite / remove.
- #unescape(s) ⇒ Object
- #warning(s) ⇒ Object
- #was_label? ⇒ Boolean
Constructor Details
#initialize(v = 18) ⇒ RubyLexer
Returns a new instance of RubyLexer.
103 104 105 106 107 |
# File 'lib/ruby_lexer.rb', line 103 def initialize v = 18 self.version = v reset end |
Instance Attribute Details
#brace_nest ⇒ Object
Returns the value of attribute brace_nest.
71 72 73 |
# File 'lib/ruby_lexer.rb', line 71 def brace_nest @brace_nest end |
#cmdarg ⇒ Object
Returns the value of attribute cmdarg.
72 73 74 |
# File 'lib/ruby_lexer.rb', line 72 def cmdarg @cmdarg end |
#command_start ⇒ Object
Returns the value of attribute command_start.
73 74 75 |
# File 'lib/ruby_lexer.rb', line 73 def command_start @command_start end |
#command_state ⇒ Object
Returns the value of attribute command_state.
74 75 76 |
# File 'lib/ruby_lexer.rb', line 74 def command_state @command_state end |
#comments ⇒ Object
TODO: remove this… maybe comment_string + attr_accessor
122 123 124 125 126 |
# File 'lib/ruby_lexer.rb', line 122 def comments # TODO: remove this... maybe comment_string + attr_accessor c = @comments.join @comments.clear c end |
#cond ⇒ Object
Returns the value of attribute cond.
76 77 78 |
# File 'lib/ruby_lexer.rb', line 76 def cond @cond end |
#extra_lineno ⇒ Object
Returns the value of attribute extra_lineno.
77 78 79 |
# File 'lib/ruby_lexer.rb', line 77 def extra_lineno @extra_lineno end |
#filename ⇒ Object
Returns the value of attribute filename.
30 31 32 |
# File 'lib/ruby_lexer.rex.rb', line 30 def filename @filename end |
#last_state ⇒ Object
Returns the value of attribute last_state.
75 76 77 |
# File 'lib/ruby_lexer.rb', line 75 def last_state @last_state end |
#lex_state ⇒ Object
Additional context surrounding tokens that both the lexer and grammar use.
83 84 85 |
# File 'lib/ruby_lexer.rb', line 83 def lex_state @lex_state end |
#lex_strterm ⇒ Object
Returns the value of attribute lex_strterm.
84 85 86 |
# File 'lib/ruby_lexer.rb', line 84 def lex_strterm @lex_strterm end |
#lineno ⇒ Object
:startdoc:
70 71 72 |
# File 'lib/ruby_lexer.rb', line 70 def lineno @lineno end |
#lpar_beg ⇒ Object
Returns the value of attribute lpar_beg.
85 86 87 |
# File 'lib/ruby_lexer.rb', line 85 def lpar_beg @lpar_beg end |
#paren_nest ⇒ Object
Returns the value of attribute paren_nest.
86 87 88 |
# File 'lib/ruby_lexer.rb', line 86 def paren_nest @paren_nest end |
#parser ⇒ Object
HACK for very end of lexer… sigh
87 88 89 |
# File 'lib/ruby_lexer.rb', line 87 def parser @parser end |
#space_seen ⇒ Object
Returns the value of attribute space_seen.
88 89 90 |
# File 'lib/ruby_lexer.rb', line 88 def space_seen @space_seen end |
#ss ⇒ Object Also known as: match
Returns the value of attribute ss.
31 32 33 |
# File 'lib/ruby_lexer.rex.rb', line 31 def ss @ss end |
#state ⇒ Object
Returns the value of attribute state.
32 33 34 |
# File 'lib/ruby_lexer.rex.rb', line 32 def state @state end |
#string_buffer ⇒ Object
Returns the value of attribute string_buffer.
89 90 91 |
# File 'lib/ruby_lexer.rb', line 89 def string_buffer @string_buffer end |
#string_nest ⇒ Object
Returns the value of attribute string_nest.
90 91 92 |
# File 'lib/ruby_lexer.rb', line 90 def string_nest @string_nest end |
#token ⇒ Object
Last token read via next_token.
93 94 95 |
# File 'lib/ruby_lexer.rb', line 93 def token @token end |
#version ⇒ Object
What version of ruby to parse. 18 and 19 are the only valid values currently supported.
99 100 101 |
# File 'lib/ruby_lexer.rb', line 99 def version @version end |
Instance Method Details
#action ⇒ Object
42 43 44 |
# File 'lib/ruby_lexer.rex.rb', line 42 def action yield end |
#arg_ambiguous ⇒ Object
109 110 111 |
# File 'lib/ruby_lexer.rb', line 109 def arg_ambiguous self.warning("Ambiguous first argument. make sure.") end |
#arg_state ⇒ Object
113 114 115 |
# File 'lib/ruby_lexer.rb', line 113 def arg_state in_arg_state? ? :expr_arg : :expr_beg end |
#beginning_of_line? ⇒ Boolean Also known as: bol?
117 118 119 |
# File 'lib/ruby_lexer.rb', line 117 def beginning_of_line? ss.bol? end |
#check(re) ⇒ Object
902 903 904 |
# File 'lib/ruby_lexer.rb', line 902 def check re ss.check re end |
#d(o) ⇒ Object
1226 1227 1228 |
# File 'lib/ruby_lexer.rb', line 1226 def d o $stderr.puts o.inspect end |
#end_of_stream? ⇒ Boolean
128 129 130 |
# File 'lib/ruby_lexer.rb', line 128 def end_of_stream? ss.eos? end |
#expr_dot? ⇒ Boolean
132 133 134 |
# File 'lib/ruby_lexer.rb', line 132 def expr_dot? lex_state == :expr_dot end |
#expr_fname? ⇒ Boolean
136 137 138 |
# File 'lib/ruby_lexer.rb', line 136 def expr_fname? lex_state == :expr_fname end |
#expr_result(token, text) ⇒ Object
140 141 142 143 144 |
# File 'lib/ruby_lexer.rb', line 140 def expr_result token, text cond.push false cmdarg.push false result :expr_beg, token, text end |
#heredoc(here) ⇒ Object
TODO: rewrite / remove
146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 |
# File 'lib/ruby_lexer.rb', line 146 def heredoc here # TODO: rewrite / remove _, eos, func, last_line = here indent = (func & STR_FUNC_INDENT) != 0 ? "[ \t]*" : nil = (func & STR_FUNC_EXPAND) != 0 eos_re = /#{indent}#{Regexp.escape eos}(\r*\n|\z)/ err_msg = "can't match #{eos_re.inspect} anywhere in " rb_compile_error err_msg if end_of_stream? if beginning_of_line? && scan(eos_re) then self.lineno += 1 ss.unread_many last_line # TODO: figure out how to remove this return :tSTRING_END, eos end self.string_buffer = [] if then case when scan(/#[$@]/) then ss.pos -= 1 # FIX omg stupid return :tSTRING_DVAR, matched when scan(/#[{]/) then return :tSTRING_DBEG, matched when scan(/#/) then string_buffer << '#' end begin c = tokadd_string func, "\n", nil rb_compile_error err_msg if c == RubyLexer::EOF if c != "\n" then return :tSTRING_CONTENT, string_buffer.join.delete("\r") else string_buffer << scan(/\n/) end rb_compile_error err_msg if end_of_stream? end until check(eos_re) else until check(eos_re) do string_buffer << scan(/.*(\n|\z)/) rb_compile_error err_msg if end_of_stream? end end self.lex_strterm = [:heredoc, eos, func, last_line] return :tSTRING_CONTENT, string_buffer.join.delete("\r") end |
#heredoc_identifier ⇒ Object
TODO: remove / rewrite
201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 |
# File 'lib/ruby_lexer.rb', line 201 def heredoc_identifier # TODO: remove / rewrite term, func = nil, STR_FUNC_BORING self.string_buffer = [] case when scan(/(-?)([\'\"\`])(.*?)\2/) then term = ss[2] func |= STR_FUNC_INDENT unless ss[1].empty? func |= case term when "\'" then STR_SQUOTE when '"' then STR_DQUOTE else STR_XQUOTE end string_buffer << ss[3] when scan(/-?([\'\"\`])(?!\1*\Z)/) then rb_compile_error "unterminated here document identifier" when scan(/(-?)(#{IDENT_CHAR}+)/) then term = '"' func |= STR_DQUOTE unless ss[1].empty? then func |= STR_FUNC_INDENT end string_buffer << ss[2] else return nil end if scan(/.*\n/) then # TODO: think about storing off the char range instead line = matched else line = nil end self.lex_strterm = [:heredoc, string_buffer.join, func, line] if term == '`' then result nil, :tXSTRING_BEG, "`" else result nil, :tSTRING_BEG, "\"" end end |
#in_arg_state? ⇒ Boolean
TODO: rename is_after_operator?
251 252 253 |
# File 'lib/ruby_lexer.rb', line 251 def in_arg_state? # TODO: rename is_after_operator? in_lex_state? :expr_fname, :expr_dot end |
#in_fname? ⇒ Boolean
247 248 249 |
# File 'lib/ruby_lexer.rb', line 247 def in_fname? in_lex_state? :expr_fname end |
#in_lex_state?(*states) ⇒ Boolean
255 256 257 |
# File 'lib/ruby_lexer.rb', line 255 def in_lex_state?(*states) states.include? lex_state end |
#int_with_base(base) ⇒ Object
259 260 261 262 |
# File 'lib/ruby_lexer.rb', line 259 def int_with_base base rb_compile_error "Invalid numeric format" if matched =~ /__/ return result(:expr_end, :tINTEGER, matched.to_i(base)) end |
#is_arg? ⇒ Boolean
264 265 266 |
# File 'lib/ruby_lexer.rb', line 264 def is_arg? in_lex_state? :expr_arg, :expr_cmdarg end |
#is_beg? ⇒ Boolean
268 269 270 |
# File 'lib/ruby_lexer.rb', line 268 def is_beg? in_lex_state? :expr_beg, :expr_value, :expr_mid, :expr_class, :expr_labelarg end |
#is_end? ⇒ Boolean
272 273 274 |
# File 'lib/ruby_lexer.rb', line 272 def is_end? in_lex_state? :expr_end, :expr_endarg, :expr_endfn end |
#is_label_possible? ⇒ Boolean
280 281 282 |
# File 'lib/ruby_lexer.rb', line 280 def is_label_possible? (in_lex_state?(:expr_beg, :expr_endfn) && !command_state) || is_arg? end |
#is_label_suffix? ⇒ Boolean
284 285 286 |
# File 'lib/ruby_lexer.rb', line 284 def is_label_suffix? check(/:(?!:)/) end |
#is_space_arg?(c = "x") ⇒ Boolean
288 289 290 |
# File 'lib/ruby_lexer.rb', line 288 def is_space_arg? c = "x" is_arg? and space_seen and c !~ /\s/ end |
#matched ⇒ Object
292 293 294 |
# File 'lib/ruby_lexer.rb', line 292 def matched ss.matched end |
#matches ⇒ Object
36 37 38 39 40 |
# File 'lib/ruby_lexer.rex.rb', line 36 def matches m = (1..9).map { |i| ss[i] } m.pop until m[-1] or m.empty? m end |
#next_token ⇒ Object
65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 |
# File 'lib/ruby_lexer.rex.rb', line 65 def next_token return process_string if lex_strterm self.command_state = self.command_start self.command_start = false self.space_seen = false self.last_state = lex_state token = nil until ss.eos? or token do token = case state when nil then case when text = ss.scan(/[\ \t\r\f\v]/) then action { self.space_seen = true; next } when text = ss.scan(/\n|\#/) then process_newline_or_comment text when text = ss.scan(/[\]\)\}]/) then process_bracing text when ss.check(/\!/) then case when in_arg_state? && (text = ss.scan(/\!\@/)) then action { result :expr_arg, :tUBANG, "!@" } when text = ss.scan(/\![=~]?/) then action { result :arg_state, TOKENS[text], text } end # group /\!/ when ss.check(/\./) then case when text = ss.scan(/\.\.\.?/) then action { result :expr_beg, TOKENS[text], text } when text = ss.scan(/\.\d/) then action { rb_compile_error "no .<digit> floating literal anymore put 0 before dot" } when text = ss.scan(/\./) then action { result :expr_dot, :tDOT, "." } end # group /\./ when text = ss.scan(/\(/) then process_paren text when text = ss.scan(/\,/) then action { result :expr_beg, TOKENS[text], text } when ss.check(/=/) then case when text = ss.scan(/\=\=\=|\=\=|\=~|\=>|\=(?!begin\b)/) then action { result arg_state, TOKENS[text], text } when bol? && (text = ss.scan(/\=begin(?=\s)/)) then process_begin text when text = ss.scan(/\=(?=begin\b)/) then action { result arg_state, TOKENS[text], text } end # group /=/ when ruby22_label? && (text = ss.scan(/\"(#{SIMPLE_STRING})\":/o)) then process_label text when text = ss.scan(/\"(#{SIMPLE_STRING})\"/o) then action { result :expr_end, :tSTRING, text[1..-2].gsub(ESC) { unescape $1 } } when text = ss.scan(/\"/) then action { string STR_DQUOTE; result nil, :tSTRING_BEG, text } when text = ss.scan(/\@\@?\d/) then action { rb_compile_error "`#{text}` is not allowed as a variable name" } when text = ss.scan(/\@\@?#{IDENT_CHAR}+/o) then process_ivar text when ss.check(/:/) then case when not_end? && (text = ss.scan(/:([a-zA-Z_]#{IDENT_CHAR}*(?:[?]|[!](?!=)|=(?==>)|=(?![=>]))?)/o)) then process_symbol text when not_end? && (text = ss.scan(/\:\"(#{SIMPLE_STRING})\"/o)) then process_symbol text when not_end? && (text = ss.scan(/\:\'(#{SSTRING})\'/o)) then process_symbol text when text = ss.scan(/\:\:/) then process_colon2 text when text = ss.scan(/\:/) then process_colon1 text end # group /:/ when text = ss.scan(/->/) then action { result :expr_endfn, :tLAMBDA, nil } when text = ss.scan(/[+-]/) then process_plus_minus text when ss.check(/[+\d]/) then case when text = ss.scan(/#{NUM_BAD}/o) then action { rb_compile_error "Invalid numeric format" } when text = ss.scan(/#{INT_DEC}/o) then action { int_with_base 10 } when text = ss.scan(/#{INT_HEX}/o) then action { int_with_base 16 } when text = ss.scan(/#{INT_BIN}/o) then action { int_with_base 2 } when text = ss.scan(/#{INT_OCT_BAD}/o) then action { rb_compile_error "Illegal octal digit." } when text = ss.scan(/#{INT_OCT}/o) then action { int_with_base 8 } when text = ss.scan(/#{FLOAT_BAD}/o) then action { rb_compile_error "Trailing '_' in number." } when text = ss.scan(/#{FLOAT}/o) then process_float text when text = ss.scan(/#{INT_DEC2}/o) then action { int_with_base 10 } when text = ss.scan(/[0-9]/) then action { rb_compile_error "Bad number format" } end # group /[+\d]/ when text = ss.scan(/\[/) then process_square_bracket text when was_label? && (text = ss.scan(/\'#{SSTRING}\':?/o)) then process_label_or_string text when ss.check(/\|/) then case when text = ss.scan(/\|\|\=/) then action { result :expr_beg, :tOP_ASGN, "||" } when text = ss.scan(/\|\|/) then action { result :expr_beg, :tOROP, "||" } when text = ss.scan(/\|\=/) then action { result :expr_beg, :tOP_ASGN, "|" } when text = ss.scan(/\|/) then action { result :arg_state, :tPIPE, "|" } end # group /\|/ when text = ss.scan(/\{/) then process_curly_brace text when ss.check(/\*/) then case when text = ss.scan(/\*\*=/) then action { result :expr_beg, :tOP_ASGN, "**" } when text = ss.scan(/\*\*/) then action { result(:arg_state, space_vs_beginning(:tDSTAR, :tDSTAR, :tPOW), "**") } when text = ss.scan(/\*\=/) then action { result(:expr_beg, :tOP_ASGN, "*") } when text = ss.scan(/\*/) then action { result(:arg_state, space_vs_beginning(:tSTAR, :tSTAR, :tSTAR2), "*") } end # group /\*/ when ss.check(/</) then case when text = ss.scan(/\<\=\>/) then action { result :arg_state, :tCMP, "<=>" } when text = ss.scan(/\<\=/) then action { result :arg_state, :tLEQ, "<=" } when text = ss.scan(/\<\<\=/) then action { result :arg_state, :tOP_ASGN, "<<" } when text = ss.scan(/\<\</) then process_lchevron text when text = ss.scan(/\</) then action { result :arg_state, :tLT, "<" } end # group /</ when ss.check(/>/) then case when text = ss.scan(/\>\=/) then action { result :arg_state, :tGEQ, ">=" } when text = ss.scan(/\>\>=/) then action { result :arg_state, :tOP_ASGN, ">>" } when text = ss.scan(/\>\>/) then action { result :arg_state, :tRSHFT, ">>" } when text = ss.scan(/\>/) then action { result :arg_state, :tGT, ">" } end # group />/ when ss.check(/\`/) then case when expr_fname? && (text = ss.scan(/\`/)) then action { result(:expr_end, :tBACK_REF2, "`") } when expr_dot? && (text = ss.scan(/\`/)) then action { result((command_state ? :expr_cmdarg : :expr_arg), :tBACK_REF2, "`") } when text = ss.scan(/\`/) then action { string STR_XQUOTE, '`'; result(nil, :tXSTRING_BEG, "`") } end # group /\`/ when text = ss.scan(/\?/) then process_questionmark text when ss.check(/&/) then case when text = ss.scan(/\&\&\=/) then action { result(:expr_beg, :tOP_ASGN, "&&") } when text = ss.scan(/\&\&/) then action { result(:expr_beg, :tANDOP, "&&") } when text = ss.scan(/\&\=/) then action { result(:expr_beg, :tOP_ASGN, "&" ) } when text = ss.scan(/\&/) then process_amper text end # group /&/ when text = ss.scan(/\//) then process_slash text when ss.check(/\^/) then case when text = ss.scan(/\^=/) then action { result(:expr_beg, :tOP_ASGN, "^") } when text = ss.scan(/\^/) then action { result(:arg_state, :tCARET, "^") } end # group /\^/ when text = ss.scan(/\;/) then action { self.command_start = true; result(:expr_beg, :tSEMI, ";") } when ss.check(/~/) then case when in_arg_state? && (text = ss.scan(/\~@/)) then action { result(:arg_state, :tTILDE, "~") } when text = ss.scan(/\~/) then action { result(:arg_state, :tTILDE, "~") } end # group /~/ when ss.check(/\\/) then case when text = ss.scan(/\\\r?\n/) then action { self.lineno += 1; self.space_seen = true; next } when text = ss.scan(/\\/) then action { rb_compile_error "bare backslash only allowed before newline" } end # group /\\/ when text = ss.scan(/\%/) then process_percent text when ss.check(/\$/) then case when text = ss.scan(/\$_\w+/) then process_gvar text when text = ss.scan(/\$_/) then process_gvar text when text = ss.scan(/\$[~*$?!@\/\\;,.=:<>\"]|\$-\w?/) then process_gvar text when in_fname? && (text = ss.scan(/\$([\&\`\'\+])/)) then process_gvar text when text = ss.scan(/\$([\&\`\'\+])/) then process_backref text when in_fname? && (text = ss.scan(/\$([1-9]\d*)/)) then process_gvar text when text = ss.scan(/\$([1-9]\d*)/) then process_nthref text when text = ss.scan(/\$0/) then process_gvar text when text = ss.scan(/\$\W|\$\z/) then process_gvar_oddity text when text = ss.scan(/\$\w+/) then process_gvar text end # group /\$/ when text = ss.scan(/\_/) then process_underscore text when text = ss.scan(/#{IDENT}/o) then process_token text when text = ss.scan(/\004|\032|\000|\Z/) then action { [RubyLexer::EOF, RubyLexer::EOF] } when text = ss.scan(/./) then action { rb_compile_error "Invalid char #{text.inspect} in expression" } else text = ss.string[ss.pos .. -1] raise ScanError, "can not match (#{state.inspect}): '#{text}'" end else raise ScanError, "undefined state: '#{state}'" end # token = case state next unless token # allow functions to trigger redo w/ nil end # while raise "bad lexical result: #{token.inspect}" unless token.nil? || (Array === token && token.size >= 2) # auto-switch state self.state = token.last if token && token.first == :state token end |
#not_end? ⇒ Boolean
296 297 298 |
# File 'lib/ruby_lexer.rb', line 296 def not_end? not is_end? end |
#old_lineno= ⇒ Object
:startdoc:
1224 1225 1226 |
# File 'lib/ruby_lexer.rb', line 1224 def lineno=(value) @lineno = value end |
#parse(str) ⇒ Object
51 52 53 54 55 56 |
# File 'lib/ruby_lexer.rex.rb', line 51 def parse str self.ss = scanner_class.new str self.state ||= nil do_parse end |
#parse_file(path) ⇒ Object
58 59 60 61 62 63 |
# File 'lib/ruby_lexer.rex.rb', line 58 def parse_file path self.filename = path open path do |f| parse f.read end end |
#parse_quote ⇒ Object
TODO: remove / rewrite
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 |
# File 'lib/ruby_lexer.rb', line 1106 def parse_quote # TODO: remove / rewrite beg, nnd, short_hand, c = nil, nil, false, nil if scan(/[a-z0-9]{1,2}/i) then # Long-hand (e.g. %Q{}). rb_compile_error "unknown type of %string" if ss.matched_size == 2 c, beg, short_hand = matched, ss.getch, false else # Short-hand (e.g. %{, %., %!, etc) c, beg, short_hand = 'Q', ss.getch, true end if end_of_stream? or c == RubyLexer::EOF or beg == RubyLexer::EOF then rb_compile_error "unterminated quoted string meets end of file" end # Figure nnd-char. "\0" is special to indicate beg=nnd and that no nesting? nnd = { "(" => ")", "[" => "]", "{" => "}", "<" => ">" }[beg] nnd, beg = beg, "\0" if nnd.nil? token_type, text = nil, "%#{c}#{beg}" token_type, string_type = case c when 'Q' then ch = short_hand ? nnd : c + beg text = "%#{ch}" [:tSTRING_BEG, STR_DQUOTE] when 'q' then [:tSTRING_BEG, STR_SQUOTE] when 'W' then scan(/\s*/) [:tWORDS_BEG, STR_DQUOTE | STR_FUNC_QWORDS] when 'w' then scan(/\s*/) [:tQWORDS_BEG, STR_SQUOTE | STR_FUNC_QWORDS] when 'x' then [:tXSTRING_BEG, STR_XQUOTE] when 'r' then [:tREGEXP_BEG, STR_REGEXP] when 's' then self.lex_state = :expr_fname [:tSYMBEG, STR_SSYM] when 'I' then scan(/\s*/) [:tSYMBOLS_BEG, STR_DQUOTE | STR_FUNC_QWORDS] when 'i' then scan(/\s*/) [:tQSYMBOLS_BEG, STR_SQUOTE | STR_FUNC_QWORDS] end rb_compile_error "Bad %string type. Expected [QqWwIixrs], found '#{c}'." if token_type.nil? raise "huh" unless string_type string string_type, nnd, beg return token_type, text end |
#parse_string(quote) ⇒ Object
TODO: rewrite / remove
1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 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 |
# File 'lib/ruby_lexer.rb', line 1163 def parse_string quote # TODO: rewrite / remove _, string_type, term, open = quote space = false # FIX: remove these func = string_type paren = open term_re = @@regexp_cache[term] qwords = (func & STR_FUNC_QWORDS) != 0 regexp = (func & STR_FUNC_REGEXP) != 0 = (func & STR_FUNC_EXPAND) != 0 unless func then # nil'ed from qwords below. *sigh* return :tSTRING_END, nil end space = true if qwords and scan(/\s+/) if self.string_nest == 0 && scan(/#{term_re}/) then if qwords then quote[1] = nil return :tSPACE, nil elsif regexp then return :tREGEXP_END, self. else return :tSTRING_END, term end end return :tSPACE, nil if space self.string_buffer = [] if case when scan(/#(?=\$(-.|[a-zA-Z_0-9~\*\$\?!@\/\\;,\.=:<>\"\&\`\'+]))/) then # TODO: !ISASCII # ?! see parser_peek_variable_name return :tSTRING_DVAR, nil when scan(/#(?=\@\@?[a-zA-Z_])/) then # TODO: !ISASCII return :tSTRING_DVAR, nil when scan(/#[{]/) then return :tSTRING_DBEG, nil when scan(/#/) then string_buffer << '#' end end if tokadd_string(func, term, paren) == RubyLexer::EOF then rb_compile_error "unterminated string meets end of file" end return :tSTRING_CONTENT, string_buffer.join end |
#process_amper(text) ⇒ Object
300 301 302 303 304 305 306 307 308 309 310 311 |
# File 'lib/ruby_lexer.rb', line 300 def process_amper text token = if is_arg? && space_seen && !check(/\s/) then warning("`&' interpreted as argument prefix") :tAMPER elsif in_lex_state? :expr_beg, :expr_mid then :tAMPER else :tAMPER2 end return result(:arg_state, token, "&") end |
#process_backref(text) ⇒ Object
313 314 315 316 317 |
# File 'lib/ruby_lexer.rb', line 313 def process_backref text token = ss[1].to_sym # TODO: can't do lineno hack w/ symbol result :expr_end, :tBACK_REF, token end |
#process_begin(text) ⇒ Object
319 320 321 322 323 324 325 326 327 328 329 330 331 |
# File 'lib/ruby_lexer.rb', line 319 def process_begin text @comments << matched unless scan(/.*?\n=end( |\t|\f)*[^\n]*(\n|\z)/m) then @comments.clear rb_compile_error("embedded document meets end of file") end @comments << matched self.lineno += matched.count("\n") nil # TODO end |
#process_bracing(text) ⇒ Object
333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 |
# File 'lib/ruby_lexer.rb', line 333 def process_bracing text cond.lexpop cmdarg.lexpop case matched when "}" then self.brace_nest -= 1 self.lex_state = :expr_endarg # TODO # if (c == '}') { # if (!brace_nest--) c = tSTRING_DEND; # } return :tRCURLY, matched when "]" then self.paren_nest -= 1 self.lex_state = :expr_endarg return :tRBRACK, matched when ")" then self.paren_nest -= 1 self.lex_state = :expr_endfn return :tRPAREN, matched else raise "Unknown bracing: #{matched.inspect}" end end |
#process_colon1(text) ⇒ Object
361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 |
# File 'lib/ruby_lexer.rb', line 361 def process_colon1 text # ?: / then / when if is_end? || check(/\s/) then return result :expr_beg, :tCOLON, text end case when scan(/\'/) then string STR_SSYM when scan(/\"/) then string STR_DSYM end result :expr_fname, :tSYMBEG, text end |
#process_colon2(text) ⇒ Object
377 378 379 380 381 382 383 |
# File 'lib/ruby_lexer.rb', line 377 def process_colon2 text if is_beg? || in_lex_state?(:expr_class) || is_space_arg? then result :expr_beg, :tCOLON3, text else result :expr_dot, :tCOLON2, text end end |
#process_curly_brace(text) ⇒ Object
385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 |
# File 'lib/ruby_lexer.rb', line 385 def process_curly_brace text self.brace_nest += 1 if lpar_beg && lpar_beg == paren_nest then self.lpar_beg = nil self.paren_nest -= 1 return expr_result(:tLAMBEG, "{") end token = if is_arg? || in_lex_state?(:expr_end, :expr_endfn) then :tLCURLY # block (primary) elsif in_lex_state?(:expr_endarg) then :tLBRACE_ARG # block (expr) else :tLBRACE # hash end self.command_start = true unless token == :tLBRACE return expr_result(token, "{") end |
#process_float(text) ⇒ Object
407 408 409 410 |
# File 'lib/ruby_lexer.rb', line 407 def process_float text rb_compile_error "Invalid numeric format" if text =~ /__/ return result(:expr_end, :tFLOAT, text.to_f) end |
#process_gvar(text) ⇒ Object
412 413 414 415 |
# File 'lib/ruby_lexer.rb', line 412 def process_gvar text text.lineno = self.lineno result(:expr_end, :tGVAR, text) end |
#process_gvar_oddity(text) ⇒ Object
417 418 419 420 |
# File 'lib/ruby_lexer.rb', line 417 def process_gvar_oddity text return result :expr_end, "$", "$" if text == "$" # TODO: wtf is this? rb_compile_error "#{text.inspect} is not allowed as a global variable name" end |
#process_ivar(text) ⇒ Object
422 423 424 425 426 |
# File 'lib/ruby_lexer.rb', line 422 def process_ivar text tok_id = text =~ /^@@/ ? :tCVAR : :tIVAR text.lineno = self.lineno return result(:expr_end, tok_id, text) end |
#process_label(text) ⇒ Object
682 683 684 685 686 |
# File 'lib/ruby_lexer.rb', line 682 def process_label text result = process_symbol text result[0] = :tLABEL result end |
#process_label_or_string(text) ⇒ Object
670 671 672 673 674 675 676 677 678 679 680 |
# File 'lib/ruby_lexer.rb', line 670 def process_label_or_string text if @was_label && text =~ /:\Z/ then @was_label = nil return process_label text elsif text =~ /:\Z/ then ss.pos -= 1 # put back ":" text = text[0..-2] end result :expr_end, :tSTRING, text[1..-2].gsub(/\\\\/, "\\").gsub(/\\'/, "'") end |
#process_lchevron(text) ⇒ Object
428 429 430 431 432 433 434 435 436 437 |
# File 'lib/ruby_lexer.rb', line 428 def process_lchevron text if (!in_lex_state?(:expr_dot, :expr_class) && !is_end? && (!is_arg? || space_seen)) then tok = self.heredoc_identifier return tok if tok end return result(:arg_state, :tLSHFT, "\<\<") end |
#process_newline_or_comment(text) ⇒ Object
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 |
# File 'lib/ruby_lexer.rb', line 439 def process_newline_or_comment text c = matched hit = false if c == '#' then ss.pos -= 1 while scan(/\s*\#.*(\n+|\z)/) do hit = true self.lineno += matched.lines.to_a.size @comments << matched.gsub(/^ +#/, '#').gsub(/^ +$/, '') end return nil if end_of_stream? end self.lineno += 1 unless hit # Replace a string of newlines with a single one self.lineno += matched.lines.to_a.size if scan(/\n+/) return if in_lex_state?(:expr_beg, :expr_value, :expr_class, :expr_fname, :expr_dot, :expr_labelarg) if scan(/([\ \t\r\f\v]*)\./) then self.space_seen = true unless ss[1].empty? ss.pos -= 1 return unless check(/\.\./) end self.command_start = true return result(:expr_beg, :tNL, nil) end |
#process_nthref(text) ⇒ Object
475 476 477 478 |
# File 'lib/ruby_lexer.rb', line 475 def process_nthref text # TODO: can't do lineno hack w/ number result :expr_end, :tNTH_REF, ss[1].to_i end |
#process_paren(text) ⇒ Object
480 481 482 483 484 485 486 487 488 489 490 |
# File 'lib/ruby_lexer.rb', line 480 def process_paren text token = if ruby18 then process_paren18 else process_paren19 end self.paren_nest += 1 return expr_result(token, "(") end |
#process_paren18 ⇒ Object
492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 |
# File 'lib/ruby_lexer.rb', line 492 def process_paren18 self.command_start = true token = :tLPAREN2 if in_lex_state? :expr_beg, :expr_mid then token = :tLPAREN elsif space_seen then if in_lex_state? :expr_cmdarg then token = :tLPAREN_ARG elsif in_lex_state? :expr_arg then warning "don't put space before argument parentheses" end else # not a ternary -- do nothing? end token end |
#process_paren19 ⇒ Object
511 512 513 514 515 516 517 518 519 |
# File 'lib/ruby_lexer.rb', line 511 def process_paren19 if is_beg? then :tLPAREN elsif is_space_arg? then :tLPAREN_ARG else :tLPAREN2 # plain '(' in parse.y end end |
#process_percent(text) ⇒ Object
521 522 523 524 525 526 527 528 529 |
# File 'lib/ruby_lexer.rb', line 521 def process_percent text return parse_quote if is_beg? return result(:expr_beg, :tOP_ASGN, "%") if scan(/\=/) return parse_quote if is_arg? && space_seen && ! check(/\s/) return result(:arg_state, :tPERCENT, "%") end |
#process_plus_minus(text) ⇒ Object
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 |
# File 'lib/ruby_lexer.rb', line 531 def process_plus_minus text sign = matched utype, type = if sign == "+" then [:tUPLUS, :tPLUS] else [:tUMINUS, :tMINUS] end if in_arg_state? then if scan(/@/) then return result(:expr_arg, utype, "#{sign}@") else return result(:expr_arg, type, sign) end end return result(:expr_beg, :tOP_ASGN, sign) if scan(/\=/) if (is_beg? || (is_arg? && space_seen && !check(/\s/))) then arg_ambiguous if is_arg? if check(/\d/) then return nil if utype == :tUPLUS return result(:expr_beg, :tUMINUS_NUM, sign) end return result(:expr_beg, utype, sign) end return result(:expr_beg, type, sign) end |
#process_questionmark(text) ⇒ Object
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 |
# File 'lib/ruby_lexer.rb', line 563 def process_questionmark text if is_end? then state = ruby18 ? :expr_beg : :expr_value # HACK? return result(state, :tEH, "?") end if end_of_stream? then rb_compile_error "incomplete character syntax: parsed #{text.inspect}" end if check(/\s|\v/) then unless is_arg? then c2 = { " " => 's', "\n" => 'n', "\t" => 't', "\v" => 'v', "\r" => 'r', "\f" => 'f' }[matched] if c2 then warning("invalid character syntax; use ?\\" + c2) end end # ternary state = ruby18 ? :expr_beg : :expr_value # HACK? return result(state, :tEH, "?") elsif check(/\w(?=\w)/) then # ternary, also return result(:expr_beg, :tEH, "?") end c = if scan(/\\/) then self.read_escape else ss.getch end if version == 18 then return result(:expr_end, :tINTEGER, c[0].ord & 0xff) else return result(:expr_end, :tSTRING, c) end end |
#process_slash(text) ⇒ Object
607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 |
# File 'lib/ruby_lexer.rb', line 607 def process_slash text if is_beg? then string STR_REGEXP return result(nil, :tREGEXP_BEG, "/") end if scan(/\=/) then return result(:expr_beg, :tOP_ASGN, "/") end if is_arg? && space_seen then unless scan(/\s/) then arg_ambiguous string STR_REGEXP, "/" return result(nil, :tREGEXP_BEG, "/") end end return result(:arg_state, :tDIVIDE, "/") end |
#process_square_bracket(text) ⇒ Object
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 |
# File 'lib/ruby_lexer.rb', line 629 def process_square_bracket text self.paren_nest += 1 token = nil if in_arg_state? then case when scan(/\]\=/) then self.paren_nest -= 1 # HACK? I dunno, or bug in MRI return result(:expr_arg, :tASET, "[]=") when scan(/\]/) then self.paren_nest -= 1 # HACK? I dunno, or bug in MRI return result(:expr_arg, :tAREF, "[]") else rb_compile_error "unexpected '['" end elsif is_beg? then token = :tLBRACK elsif is_arg? && space_seen then token = :tLBRACK else token = :tLBRACK2 end return expr_result(token, "[") end |
#process_string ⇒ Object
TODO: rewrite / remove
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 |
# File 'lib/ruby_lexer.rb', line 1080 def process_string # TODO: rewrite / remove token = if lex_strterm[0] == :heredoc then self.heredoc lex_strterm else self.parse_string lex_strterm end token_type, c = token if ruby22? && token_type == :tSTRING_END && ["'", '"'].include?(c) then if (([:expr_beg, :expr_endfn].include?(lex_state) && !cond.is_in_state) || is_arg?) && is_label_suffix? then scan(/:/) token_type = token[0] = :tLABEL_END end end if [:tSTRING_END, :tREGEXP_END, :tLABEL_END].include? token_type then self.lex_strterm = nil self.lex_state = (token_type == :tLABEL_END) ? :expr_labelarg : :expr_end end return token end |
#process_symbol(text) ⇒ Object
656 657 658 659 660 661 662 663 |
# File 'lib/ruby_lexer.rb', line 656 def process_symbol text symbol = match[1].gsub(ESC) { unescape $1 } rb_compile_error "symbol cannot contain '\\0'" if ruby18 && symbol =~ /\0/ return result(:expr_end, :tSYMBOL, symbol) end |
#process_token(text) ⇒ Object
688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 |
# File 'lib/ruby_lexer.rb', line 688 def process_token text # TODO: make this always return [token, lineno] token = self.token = text token << matched if scan(/[\!\?](?!=)/) tok_id = case when token =~ /[!?]$/ then :tFID when in_lex_state?(:expr_fname) && scan(/=(?:(?![~>=])|(?==>))/) then # ident=, not =~ => == or followed by => # TODO test lexing of a=>b vs a==>b token << matched :tIDENTIFIER when token =~ /^[A-Z]/ then :tCONSTANT else :tIDENTIFIER end if !ruby18 and is_label_possible? and is_label_suffix? then scan(/:/) return result(:expr_labelarg, :tLABEL, [token, self.lineno]) end unless in_lex_state? :expr_dot then # See if it is a reserved word. keyword = if ruby18 then # REFACTOR need 18/19 lexer subclasses RubyParserStuff::Keyword.keyword18 token else RubyParserStuff::Keyword.keyword19 token end return process_token_keyword keyword if keyword end # unless in_lex_state? :expr_dot # TODO: # if (mb == ENC_CODERANGE_7BIT && lex_state != EXPR_DOT) { state = if is_beg? or is_arg? or in_lex_state? :expr_dot then command_state ? :expr_cmdarg : :expr_arg elsif not ruby18 and in_lex_state? :expr_fname then :expr_endfn else :expr_end end if not [:expr_dot, :expr_fname].include? last_state and self.parser.env[token.to_sym] == :lvar then state = :expr_end end token.lineno = self.lineno # yes, on a string. I know... I know... return result(state, tok_id, token) end |
#process_token_keyword(keyword) ⇒ Object
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 |
# File 'lib/ruby_lexer.rb', line 745 def process_token_keyword keyword state = keyword.state value = [token, self.lineno] self.command_start = true if state == :expr_beg and lex_state != :expr_fname case when lex_state == :expr_fname then result(state, keyword.id0, keyword.name) when keyword.id0 == :kDO then case when lpar_beg && lpar_beg == paren_nest then self.lpar_beg = nil self.paren_nest -= 1 result(state, :kDO_LAMBDA, value) when cond.is_in_state then result(state, :kDO_COND, value) when cmdarg.is_in_state && lex_state != :expr_cmdarg then result(state, :kDO_BLOCK, value) when in_lex_state?(:expr_beg, :expr_endarg) then result(state, :kDO_BLOCK, value) else result(state, :kDO, value) end when in_lex_state?(:expr_beg, :expr_value) then # TODO: :expr_labelarg result(state, keyword.id0, value) when keyword.id0 != keyword.id1 then result(:expr_beg, keyword.id1, value) else result(state, keyword.id1, value) end end |
#process_underscore(text) ⇒ Object
779 780 781 782 783 784 785 786 787 |
# File 'lib/ruby_lexer.rb', line 779 def process_underscore text ss.unscan # put back "_" if beginning_of_line? && scan(/\__END__(\r?\n|\Z)/) then return [RubyLexer::EOF, RubyLexer::EOF] elsif scan(/\_\w*/) then return process_token matched end end |
#rb_compile_error(msg) ⇒ Object
789 790 791 792 |
# File 'lib/ruby_lexer.rb', line 789 def rb_compile_error msg msg += ". near line #{self.lineno}: #{ss.rest[/^.*/].inspect}" raise RubyParser::SyntaxError, msg end |
#read_escape ⇒ Object
TODO: remove / rewrite
794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 |
# File 'lib/ruby_lexer.rb', line 794 def read_escape # TODO: remove / rewrite case when scan(/\\/) then # Backslash '\\' when scan(/n/) then # newline "\n" when scan(/t/) then # horizontal tab "\t" when scan(/r/) then # carriage-return "\r" when scan(/f/) then # form-feed "\f" when scan(/v/) then # vertical tab "\13" when scan(/a/) then # alarm(bell) "\007" when scan(/e/) then # escape "\033" when scan(/b/) then # backspace "\010" when scan(/s/) then # space " " when scan(/[0-7]{1,3}/) then # octal constant (matched.to_i(8) & 0xFF).chr when scan(/x([0-9a-fA-F]{1,2})/) then # hex constant ss[1].to_i(16).chr when check(/M-\\[\\MCc]/) then scan(/M-\\/) # eat it c = self.read_escape c[0] = (c[0].ord | 0x80).chr c when scan(/M-(.)/) then c = ss[1] c[0] = (c[0].ord | 0x80).chr c when check(/(C-|c)\\[\\MCc]/) then scan(/(C-|c)\\/) # eat it c = self.read_escape c[0] = (c[0].ord & 0x9f).chr c when scan(/C-\?|c\?/) then 127.chr when scan(/(C-|c)(.)/) then c = ss[2] c[0] = (c[0].ord & 0x9f).chr c when scan(/^[89]/i) then # bad octal or hex... MRI ignores them :( matched when scan(/u([0-9a-fA-F]{2,4}|\{[0-9a-fA-F]{2,6}\})/) then [ss[1].delete("{}").to_i(16)].pack("U") when scan(/[McCx0-9]/) || end_of_stream? then rb_compile_error("Invalid escape character syntax") else ss.getch end end |
#regx_options ⇒ Object
TODO: rewrite / remove
851 852 853 854 855 856 857 858 859 860 861 862 863 864 |
# File 'lib/ruby_lexer.rb', line 851 def # TODO: rewrite / remove good, bad = [], [] if scan(/[a-z]+/) then good, bad = matched.split(//).partition { |s| s =~ /^[ixmonesu]$/ } end unless bad.empty? then rb_compile_error("unknown regexp option%s - %s" % [(bad.size > 1 ? "s" : ""), bad.join.inspect]) end return good.join end |
#reset ⇒ Object
866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 |
# File 'lib/ruby_lexer.rb', line 866 def reset self.brace_nest = 0 self.command_start = true self.comments = [] self.lex_state = nil self.lex_strterm = nil self.lineno = 1 self.lpar_beg = nil self.paren_nest = 0 self.space_seen = false self.string_nest = 0 self.token = nil self.extra_lineno = 0 self.cmdarg = RubyParserStuff::StackState.new(:cmdarg) self.cond = RubyParserStuff::StackState.new(:cond) end |
#result(lex_state, token, text) ⇒ Object
:nodoc:
884 885 886 887 888 |
# File 'lib/ruby_lexer.rb', line 884 def result lex_state, token, text # :nodoc: lex_state = self.arg_state if lex_state == :arg_state self.lex_state = lex_state if lex_state [token, text] end |
#ruby18 ⇒ Object
890 891 892 |
# File 'lib/ruby_lexer.rb', line 890 def ruby18 Ruby18Parser === parser end |
#ruby19 ⇒ Object
894 895 896 |
# File 'lib/ruby_lexer.rb', line 894 def ruby19 Ruby19Parser === parser end |
#ruby22? ⇒ Boolean
1076 1077 1078 |
# File 'lib/ruby_lexer.rb', line 1076 def ruby22? Ruby22Parser === parser end |
#ruby22_label? ⇒ Boolean
276 277 278 |
# File 'lib/ruby_lexer.rb', line 276 def ruby22_label? ruby22? and is_label_possible? end |
#scan(re) ⇒ Object
898 899 900 |
# File 'lib/ruby_lexer.rb', line 898 def scan re ss.scan re end |
#scanner_class ⇒ Object
TODO: design this out of oedipus_lex. or something.
906 907 908 |
# File 'lib/ruby_lexer.rb', line 906 def scanner_class # TODO: design this out of oedipus_lex. or something. RPStringScanner end |
#space_vs_beginning(space_type, beg_type, fallback) ⇒ Object
910 911 912 913 914 915 916 917 918 919 920 |
# File 'lib/ruby_lexer.rb', line 910 def space_vs_beginning space_type, beg_type, fallback if is_space_arg? check(/./m) then warning "`**' interpreted as argument prefix" space_type elsif is_beg? then beg_type else # TODO: warn_balanced("**", "argument prefix"); fallback end end |
#string(type, beg = matched, nnd = "\0") ⇒ Object
922 923 924 |
# File 'lib/ruby_lexer.rb', line 922 def string type, beg = matched, nnd = "\0" self.lex_strterm = [:strterm, type, beg, nnd] end |
#tokadd_escape(term) ⇒ Object
TODO: consider def src= src
raise "bad src: #{src.inspect}" unless String === src
@src = RPStringScanner.new(src)
end
932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 |
# File 'lib/ruby_lexer.rb', line 932 def tokadd_escape term # TODO: rewrite / remove case when scan(/\\\n/) then # just ignore when scan(/\\([0-7]{1,3}|x[0-9a-fA-F]{1,2})/) then self.string_buffer << matched when scan(/\\([MC]-|c)(?=\\)/) then self.string_buffer << matched self.tokadd_escape term when scan(/\\([MC]-|c)(.)/) then self.string_buffer << matched when scan(/\\[McCx]/) then rb_compile_error "Invalid escape character syntax" when scan(/\\(.)/m) then self.string_buffer << matched else rb_compile_error "Invalid escape character syntax" end end |
#tokadd_string(func, term, paren) ⇒ Object
TODO: rewrite / remove
952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 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 |
# File 'lib/ruby_lexer.rb', line 952 def tokadd_string(func, term, paren) # TODO: rewrite / remove qwords = (func & STR_FUNC_QWORDS) != 0 escape = (func & STR_FUNC_ESCAPE) != 0 = (func & STR_FUNC_EXPAND) != 0 regexp = (func & STR_FUNC_REGEXP) != 0 symbol = (func & STR_FUNC_SYMBOL) != 0 paren_re = @@regexp_cache[paren] term_re = @@regexp_cache[term] until end_of_stream? do c = nil handled = true case when paren_re && scan(paren_re) then self.string_nest += 1 when scan(term_re) then if self.string_nest == 0 then ss.pos -= 1 break else self.string_nest -= 1 end when && scan(/#(?=[\$\@\{])/) then ss.pos -= 1 break when qwords && scan(/\s/) then ss.pos -= 1 break when && scan(/#(?!\n)/) then # do nothing when check(/\\/) then case when qwords && scan(/\\\n/) then string_buffer << "\n" next when qwords && scan(/\\\s/) then c = ' ' when && scan(/\\\n/) then next when regexp && check(/\\/) then self.tokadd_escape term next when && scan(/\\/) then c = self.read_escape when scan(/\\\n/) then # do nothing when scan(/\\\\/) then string_buffer << '\\' if escape c = '\\' when scan(/\\/) then unless scan(term_re) || paren.nil? || scan(paren_re) then string_buffer << "\\" end else handled = false end # inner /\\/ case else handled = false end # top case unless handled then t = Regexp.escape term x = Regexp.escape(paren) if paren && paren != "\000" re = if qwords then if RUBY19 then /[^#{t}#{x}\#\0\\\s]+|./ # |. to pick up whatever else /[^#{t}#{x}\#\0\\\s\v]+|./ # argh. 1.8's \s doesn't pick up \v end else /[^#{t}#{x}\#\0\\]+|./ end scan re c = matched rb_compile_error "symbol cannot contain '\\0'" if symbol && c =~ /\0/ end # unless handled c ||= matched string_buffer << c end # until c ||= matched c = RubyLexer::EOF if end_of_stream? return c end |
#unescape(s) ⇒ Object
1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 |
# File 'lib/ruby_lexer.rb', line 1043 def unescape s r = ESCAPES[s] self.extra_lineno -= 1 if r && s == "n" return r if r x = case s when /^[0-7]{1,3}/ then ($&.to_i(8) & 0xFF).chr when /^x([0-9a-fA-F]{1,2})/ then $1.to_i(16).chr when /^M-(.)/ then ($1[0].ord | 0x80).chr when /^(C-|c)(.)/ then ($2[0].ord & 0x9f).chr when /^[89a-f]/i then # bad octal or hex... ignore? that's what MRI does :( s when /^[McCx0-9]/ then rb_compile_error("Invalid escape character syntax") when /u([0-9a-fA-F]{2,4}|\{[0-9a-fA-F]{2,6}\})/ then [$1.delete("{}").to_i(16)].pack("U") else s end x.force_encoding "UTF-8" if RUBY19 x end |
#warning(s) ⇒ Object
1072 1073 1074 |
# File 'lib/ruby_lexer.rb', line 1072 def warning s # do nothing for now end |
#was_label? ⇒ Boolean
665 666 667 668 |
# File 'lib/ruby_lexer.rb', line 665 def was_label? @was_label = ruby22_label? true end |