Class: RubyLexer
- Inherits:
-
Object
- Object
- RubyLexer
- Includes:
- State::Values
- Defined in:
- lib/ruby_lexer.rex.rb,
lib/ruby_lexer.rb,
lib/ruby_lexer.rb
Overview
The generated lexer RubyLexer
Defined Under Namespace
Classes: LexerError, ScanError, State
Constant Summary collapse
- HAS_ENC =
:stopdoc:
"".respond_to? :encoding
- IDENT_CHAR =
if HAS_ENC 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_FUNC_ICNTNT =
<<~HEREDOC
0x40
- 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, }
- TAB_WIDTH =
8
- IDENT =
:stopdoc:
/^#{IDENT_CHAR}+/o
- ESC =
/\\((?>[0-7]{1,3}|x[0-9a-fA-F]{1,2}|M-[^\\]|(C-|c)[^\\]|u[0-9a-fA-F]{1,4}|u\{[0-9a-fA-F]+\}|[^0-7xMCc]))/
- SIMPLE_STRING =
/((#{ESC}|\#(#{ESC}|[^\{\#\@\$\"\\])|[^\"\\\#])*)/o
- SSTRING =
/((\\.|[^\'])*)/
- INT_DEC =
/[+]?(?:(?:[1-9][\d_]*|0)(?!\.\d)(ri|r|i)?\b|0d[0-9_]+)(ri|r|i)?/i
- INT_HEX =
/[+]?0x[a-f0-9_]+(ri|r|i)?/i
- INT_BIN =
/[+]?0b[01_]+(ri|r|i)?/i
- INT_OCT =
/[+]?0o?[0-7_]+(ri|r|i)?|0o(ri|r|i)?/i
- FLOAT =
/[+]?\d[\d_]*\.[\d_]+(e[+-]?[\d_]+)?(?:(ri|r|i)\b)?|[+]?[\d_]+e[+-]?[\d_]+(?:(ri|r|i)\b)?/i
- INT_DEC2 =
/[+]?\d[0-9_]*(?![e])((ri|r|i)\b)?/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)) }
Constants included from State::Values
State::Values::EXPR_ARG, State::Values::EXPR_ARG_ANY, State::Values::EXPR_BEG, State::Values::EXPR_BEG_ANY, State::Values::EXPR_CLASS, State::Values::EXPR_CMDARG, State::Values::EXPR_DOT, State::Values::EXPR_END, State::Values::EXPR_ENDARG, State::Values::EXPR_ENDFN, State::Values::EXPR_END_ANY, State::Values::EXPR_FITEM, State::Values::EXPR_FNAME, State::Values::EXPR_LAB, State::Values::EXPR_LABEL, State::Values::EXPR_LABELED, State::Values::EXPR_MID, State::Values::EXPR_NONE, State::Values::EXPR_NUM, State::Values::EXPR_PAD, State::Values::EXPR_PAR
Instance Attribute Summary collapse
-
#brace_nest ⇒ Object
Returns the value of attribute brace_nest.
-
#cmd_state ⇒ Object
temporary–ivar to avoid passing everywhere.
-
#cmdarg ⇒ Object
Returns the value of attribute cmdarg.
-
#command_start ⇒ Object
Returns the value of attribute command_start.
-
#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
The file name / path.
-
#last_state ⇒ Object
Returns the value of attribute last_state.
-
#lex_state ⇒ Object
Returns the value of attribute lex_state.
-
#lex_strterm ⇒ Object
Additional context surrounding tokens that both the lexer and grammar use.
-
#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)
The StringScanner for this lexer.
-
#state ⇒ Object
The current lexical 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.
Instance Method Summary collapse
-
#action ⇒ Object
Yields on the current action.
- #arg_ambiguous ⇒ Object
- #arg_state ⇒ Object
- #beginning_of_line? ⇒ Boolean (also: #bol?)
- #check(re) ⇒ Object
- #d(o) ⇒ Object
- #dedent_string(string, width) ⇒ Object
- #eat_whitespace ⇒ Object
- #end_of_stream? ⇒ Boolean
- #expr_dot? ⇒ Boolean
-
#expr_fname? ⇒ Boolean
REFACTOR.
- #expr_result(token, text) ⇒ Object
- #fixup_lineno(extra = 0) ⇒ Object
-
#heredoc(here) ⇒ Object
TODO: rewrite / remove.
- #heredoc_dedent(string_content) ⇒ Object
-
#heredoc_identifier ⇒ Object
TODO: remove / rewrite.
- #heredoc_whitespace_indent_size(whitespace) ⇒ Object
-
#in_fname? ⇒ Boolean
REFACTOR.
-
#initialize(_ = nil) ⇒ RubyLexer
constructor
A new instance of RubyLexer.
- #int_with_base(base) ⇒ Object
- #is_after_operator? ⇒ Boolean
- #is_arg? ⇒ Boolean
- #is_beg? ⇒ Boolean
- #is_end? ⇒ Boolean
- #is_label_possible? ⇒ Boolean
- #is_label_suffix? ⇒ Boolean
- #is_space_arg?(c = "x") ⇒ Boolean
- #lambda_beginning? ⇒ Boolean
-
#location ⇒ Object
The current location in the parse.
- #lvar_defined?(id) ⇒ Boolean
- #matched ⇒ Object
-
#matches ⇒ Object
The match groups for the current scan.
-
#next_token ⇒ Object
Lex the next token.
- #not_end? ⇒ Boolean
-
#old_lineno= ⇒ Object
:startdoc:.
-
#parse(str) ⇒ Object
Parse the given string.
-
#parse_file(path) ⇒ Object
Read in and parse the file at
path
. -
#parse_quote ⇒ Object
TODO: remove / rewrite.
-
#parse_string(quote) ⇒ Object
TODO: rewrite / remove.
- #possibly_escape_string(text, check) ⇒ Object
- #process_amper(text) ⇒ Object
- #process_backref(text) ⇒ Object
- #process_begin(text) ⇒ Object
- #process_brace_close(text) ⇒ Object
- #process_brace_open(text) ⇒ Object
- #process_colon1(text) ⇒ Object
- #process_colon2(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_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(new_state, token, text) ⇒ Object
:nodoc:.
- #ruby22_label? ⇒ Boolean
- #ruby22plus? ⇒ Boolean
- #ruby23plus? ⇒ Boolean
- #scan(re) ⇒ Object
-
#scanner_class ⇒ Object
The current scanner class.
- #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(_ = nil) ⇒ RubyLexer
Returns a new instance of RubyLexer.
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# File 'lib/ruby_lexer.rb', line 201 def initialize _ = nil @lex_state = nil # remove one warning under $DEBUG self.lex_state = EXPR_NONE self.cond = RubyParserStuff::StackState.new(:cond, $DEBUG) self.cmdarg = RubyParserStuff::StackState.new(:cmdarg, $DEBUG) reset end |
Instance Attribute Details
#brace_nest ⇒ Object
Returns the value of attribute brace_nest.
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# File 'lib/ruby_lexer.rb', line 176 def brace_nest @brace_nest end |
#cmd_state ⇒ Object
temporary–ivar to avoid passing everywhere
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# File 'lib/ruby_lexer.rb', line 179 def cmd_state @cmd_state end |
#cmdarg ⇒ Object
Returns the value of attribute cmdarg.
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# File 'lib/ruby_lexer.rb', line 177 def cmdarg @cmdarg end |
#command_start ⇒ Object
Returns the value of attribute command_start.
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# File 'lib/ruby_lexer.rb', line 178 def command_start @command_start end |
#comments ⇒ Object
TODO: remove this… maybe comment_string + attr_accessor
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# File 'lib/ruby_lexer.rb', line 224 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.
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# File 'lib/ruby_lexer.rb', line 181 def cond @cond end |
#extra_lineno ⇒ Object
Returns the value of attribute extra_lineno.
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# File 'lib/ruby_lexer.rb', line 182 def extra_lineno @extra_lineno end |
#filename ⇒ Object
The file name / path
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# File 'lib/ruby_lexer.rex.rb', line 41 def filename @filename end |
#last_state ⇒ Object
Returns the value of attribute last_state.
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# File 'lib/ruby_lexer.rb', line 180 def last_state @last_state end |
#lex_state ⇒ Object
Returns the value of attribute lex_state.
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# File 'lib/ruby_lexer.rb', line 134 def lex_state @lex_state end |
#lex_strterm ⇒ Object
Additional context surrounding tokens that both the lexer and grammar use.
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# File 'lib/ruby_lexer.rb', line 188 def lex_strterm @lex_strterm end |
#lineno ⇒ Object
:startdoc:
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# File 'lib/ruby_lexer.rb', line 175 def lineno @lineno end |
#lpar_beg ⇒ Object
Returns the value of attribute lpar_beg.
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# File 'lib/ruby_lexer.rb', line 189 def lpar_beg @lpar_beg end |
#paren_nest ⇒ Object
Returns the value of attribute paren_nest.
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# File 'lib/ruby_lexer.rb', line 190 def paren_nest @paren_nest end |
#parser ⇒ Object
HACK for very end of lexer… sigh
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# File 'lib/ruby_lexer.rb', line 191 def parser @parser end |
#space_seen ⇒ Object
Returns the value of attribute space_seen.
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# File 'lib/ruby_lexer.rb', line 192 def space_seen @space_seen end |
#ss ⇒ Object Also known as: match
The StringScanner for this lexer.
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# File 'lib/ruby_lexer.rex.rb', line 46 def ss @ss end |
#state ⇒ Object
The current lexical state.
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# File 'lib/ruby_lexer.rex.rb', line 51 def state @state end |
#string_buffer ⇒ Object
Returns the value of attribute string_buffer.
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# File 'lib/ruby_lexer.rb', line 193 def string_buffer @string_buffer end |
#string_nest ⇒ Object
Returns the value of attribute string_nest.
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# File 'lib/ruby_lexer.rb', line 194 def string_nest @string_nest end |
#token ⇒ Object
Last token read via next_token.
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# File 'lib/ruby_lexer.rb', line 197 def token @token end |
Instance Method Details
#action ⇒ Object
Yields on the current action.
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# File 'lib/ruby_lexer.rex.rb', line 67 def action yield end |
#arg_ambiguous ⇒ Object
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# File 'lib/ruby_lexer.rb', line 211 def arg_ambiguous self.warning("Ambiguous first argument. make sure.") end |
#arg_state ⇒ Object
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# File 'lib/ruby_lexer.rb', line 215 def arg_state is_after_operator? ? EXPR_ARG : EXPR_BEG end |
#beginning_of_line? ⇒ Boolean Also known as: bol?
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# File 'lib/ruby_lexer.rb', line 219 def beginning_of_line? ss.bol? end |
#check(re) ⇒ Object
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# File 'lib/ruby_lexer.rb', line 1091 def check re ss.check re end |
#d(o) ⇒ Object
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# File 'lib/ruby_lexer.rb', line 1439 def d o $stderr.puts o.inspect end |
#dedent_string(string, width) ⇒ Object
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# File 'lib/ruby_lexer.rb', line 323 def dedent_string(string, width) characters_skipped = 0 indentation_skipped = 0 string.chars.each do |char| break if indentation_skipped >= width if char == ' ' characters_skipped += 1 indentation_skipped += 1 elsif char == "\t" proposed = TAB_WIDTH * (indentation_skipped / TAB_WIDTH + 1) break if (proposed > width) characters_skipped += 1 indentation_skipped = proposed end end string[characters_skipped..-1] end |
#eat_whitespace ⇒ Object
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# File 'lib/ruby_lexer.rb', line 1095 def eat_whitespace r = scan(/\s+/) self.extra_lineno += r.count("\n") if r r end |
#end_of_stream? ⇒ Boolean
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# File 'lib/ruby_lexer.rb', line 230 def end_of_stream? ss.eos? end |
#expr_dot? ⇒ Boolean
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# File 'lib/ruby_lexer.rb', line 234 def expr_dot? lex_state =~ EXPR_DOT end |
#expr_fname? ⇒ Boolean
REFACTOR
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# File 'lib/ruby_lexer.rb', line 238 def expr_fname? # REFACTOR lex_state =~ EXPR_FNAME end |
#expr_result(token, text) ⇒ Object
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# File 'lib/ruby_lexer.rb', line 242 def expr_result token, text cond.push false cmdarg.push false result EXPR_BEG, token, text end |
#fixup_lineno(extra = 0) ⇒ Object
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# File 'lib/ruby_lexer.rb', line 1101 def fixup_lineno extra = 0 self.lineno += self.extra_lineno + extra self.extra_lineno = 0 end |
#heredoc(here) ⇒ Object
TODO: rewrite / remove
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# File 'lib/ruby_lexer.rb', line 248 def heredoc here # TODO: rewrite / remove _, eos, func, last_line = here indent = (func & STR_FUNC_INDENT) != 0 ? "[ \t]*" : nil content_indent = (func & STR_FUNC_ICNTNT) != 0 = (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] string_content = begin s = string_buffer.join s.delete "\r" rescue ArgumentError s.b.delete("\r").force_encoding Encoding::UTF_8 end string_content = heredoc_dedent(string_content) if content_indent && ruby23plus? return :tSTRING_CONTENT, string_content end |
#heredoc_dedent(string_content) ⇒ Object
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# File 'lib/ruby_lexer.rb', line 313 def heredoc_dedent(string_content) width = string_content.scan(/^[ \t]*(?=\S)/).map do |whitespace| heredoc_whitespace_indent_size whitespace end.min || 0 string_content.split("\n", -1).map do |line| dedent_string line, width end.join "\n" end |
#heredoc_identifier ⇒ Object
TODO: remove / rewrite
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# File 'lib/ruby_lexer.rb', line 352 def heredoc_identifier # TODO: remove / rewrite term, func = nil, STR_FUNC_BORING self.string_buffer = [] heredoc_indent_mods = '-' heredoc_indent_mods += '\~' if ruby23plus? case when scan(/([#{heredoc_indent_mods}]?)([\'\"\`])(.*?)\2/) then term = ss[2] func |= STR_FUNC_INDENT unless ss[1].empty? func |= STR_FUNC_ICNTNT if ss[1] == '~' func |= case term when "\'" then STR_SQUOTE when '"' then STR_DQUOTE else STR_XQUOTE end string_buffer << ss[3] when scan(/[#{heredoc_indent_mods}]?([\'\"\`])(?!\1*\Z)/) then rb_compile_error "unterminated here document identifier" when scan(/([#{heredoc_indent_mods}]?)(#{IDENT_CHAR}+)/) then term = '"' func |= STR_DQUOTE unless ss[1].empty? then func |= STR_FUNC_INDENT func |= STR_FUNC_ICNTNT if ss[1] == '~' 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 |
#heredoc_whitespace_indent_size(whitespace) ⇒ Object
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# File 'lib/ruby_lexer.rb', line 342 def heredoc_whitespace_indent_size(whitespace) whitespace.chars.inject 0 do |size, char| if char == "\t" size + TAB_WIDTH else size + 1 end end end |
#in_fname? ⇒ Boolean
REFACTOR
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# File 'lib/ruby_lexer.rb', line 403 def in_fname? # REFACTOR lex_state =~ EXPR_FNAME end |
#int_with_base(base) ⇒ Object
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# File 'lib/ruby_lexer.rb', line 411 def int_with_base base rb_compile_error "Invalid numeric format" if matched =~ /__/ text = matched case when text.end_with?('ri') return result(EXPR_NUM, :tIMAGINARY, Complex(0, Rational(text.chop.chop.to_i(base)))) when text.end_with?('r') return result(EXPR_NUM, :tRATIONAL, Rational(text.chop.to_i(base))) when text.end_with?('i') return result(EXPR_NUM, :tIMAGINARY, Complex(0, text.chop.to_i(base))) else return result(EXPR_NUM, :tINTEGER, text.to_i(base)) end end |
#is_after_operator? ⇒ Boolean
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# File 'lib/ruby_lexer.rb', line 407 def is_after_operator? lex_state =~ EXPR_FNAME|EXPR_DOT end |
#is_arg? ⇒ Boolean
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# File 'lib/ruby_lexer.rb', line 427 def is_arg? lex_state =~ EXPR_ARG_ANY end |
#is_beg? ⇒ Boolean
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# File 'lib/ruby_lexer.rb', line 431 def is_beg? lex_state =~ EXPR_BEG_ANY || lex_state == EXPR_LAB # yes, == EXPR_LAB end |
#is_end? ⇒ Boolean
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# File 'lib/ruby_lexer.rb', line 435 def is_end? lex_state =~ EXPR_END_ANY end |
#is_label_possible? ⇒ Boolean
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# File 'lib/ruby_lexer.rb', line 448 def is_label_possible? (lex_state =~ EXPR_LABEL|EXPR_ENDFN && !cmd_state) || is_arg? end |
#is_label_suffix? ⇒ Boolean
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# File 'lib/ruby_lexer.rb', line 452 def is_label_suffix? check(/:(?!:)/) end |
#is_space_arg?(c = "x") ⇒ Boolean
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# File 'lib/ruby_lexer.rb', line 456 def is_space_arg? c = "x" is_arg? and space_seen and c !~ /\s/ end |
#lambda_beginning? ⇒ Boolean
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# File 'lib/ruby_lexer.rb', line 460 def lambda_beginning? lpar_beg && lpar_beg == paren_nest end |
#location ⇒ Object
The current location in the parse.
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# File 'lib/ruby_lexer.rex.rb', line 102 def location [ (filename || "<input>"), ].compact.join(":") end |
#lvar_defined?(id) ⇒ Boolean
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# File 'lib/ruby_lexer.rb', line 439 def lvar_defined? id # TODO: (dyna_in_block? && dvar_defined?(id)) || local_id?(id) self.parser.env[id.to_sym] == :lvar end |
#matched ⇒ Object
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# File 'lib/ruby_lexer.rb', line 464 def matched ss.matched end |
#matches ⇒ Object
The match groups for the current scan.
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# File 'lib/ruby_lexer.rex.rb', line 58 def matches m = (1..9).map { |i| ss[i] } m.pop until m[-1] or m.empty? m end |
#next_token ⇒ Object
Lex the next token.
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# File 'lib/ruby_lexer.rex.rb', line 111 def next_token return process_string if lex_strterm self.cmd_state = self.command_start self.command_start = false self.space_seen = false # TODO: rename token_seen? self.last_state = lex_state token = nil until ss.eos? or token do token = case state when nil then case when ss.skip(/[\ \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_brace_close text when ss.match?(/\!/) then case when is_after_operator? && (ss.skip(/\!\@/)) then action { result EXPR_ARG, :tUBANG, "!@" } when text = ss.scan(/\![=~]?/) then action { result :arg_state, TOKENS[text], text } end # group /\!/ when ss.match?(/\./) then case when text = ss.scan(/\.\.\.?/) then action { result EXPR_BEG, TOKENS[text], text } when ss.skip(/\.\d/) then action { rb_compile_error "no .<digit> floating literal anymore put 0 before dot" } when ss.skip(/\./) then action { self.lex_state = EXPR_BEG; result EXPR_DOT, :tDOT, "." } end # group /\./ when text = ss.scan(/\(/) then process_paren text when text = ss.scan(/\,/) then action { result EXPR_PAR, TOKENS[text], text } when ss.match?(/=/) 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.match?(/:/) 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 ss.skip(/->/) then action { result EXPR_ENDFN, :tLAMBDA, nil } when text = ss.scan(/[+-]/) then process_plus_minus text when ss.match?(/[+\d]/) then case when ss.skip(/#{NUM_BAD}/o) then action { rb_compile_error "Invalid numeric format" } when ss.skip(/#{INT_DEC}/o) then action { int_with_base 10 } when ss.skip(/#{INT_HEX}/o) then action { int_with_base 16 } when ss.skip(/#{INT_BIN}/o) then action { int_with_base 2 } when ss.skip(/#{INT_OCT_BAD}/o) then action { rb_compile_error "Illegal octal digit." } when ss.skip(/#{INT_OCT}/o) then action { int_with_base 8 } when ss.skip(/#{FLOAT_BAD}/o) then action { rb_compile_error "Trailing '_' in number." } when text = ss.scan(/#{FLOAT}/o) then process_float text when ss.skip(/#{INT_DEC2}/o) then action { int_with_base 10 } when ss.skip(/[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.match?(/\|/) then case when ss.skip(/\|\|\=/) then action { result EXPR_BEG, :tOP_ASGN, "||" } when ss.skip(/\|\|/) then action { result EXPR_BEG, :tOROP, "||" } when ss.skip(/\|\=/) then action { result EXPR_BEG, :tOP_ASGN, "|" } when ss.skip(/\|/) then action { state = is_after_operator? ? EXPR_ARG : EXPR_PAR; result state, :tPIPE, "|" } end # group /\|/ when text = ss.scan(/\{/) then process_brace_open text when ss.match?(/\*/) then case when ss.skip(/\*\*=/) then action { result EXPR_BEG, :tOP_ASGN, "**" } when ss.skip(/\*\*/) then action { result(:arg_state, space_vs_beginning(:tDSTAR, :tDSTAR, :tPOW), "**") } when ss.skip(/\*\=/) then action { result(EXPR_BEG, :tOP_ASGN, "*") } when ss.skip(/\*/) then action { result(:arg_state, space_vs_beginning(:tSTAR, :tSTAR, :tSTAR2), "*") } end # group /\*/ when ss.match?(/</) then case when ss.skip(/\<\=\>/) then action { result :arg_state, :tCMP, "<=>" } when ss.skip(/\<\=/) then action { result :arg_state, :tLEQ, "<=" } when ss.skip(/\<\<\=/) then action { result EXPR_BEG, :tOP_ASGN, "<<" } when text = ss.scan(/\<\</) then process_lchevron text when ss.skip(/\</) then action { result :arg_state, :tLT, "<" } end # group /</ when ss.match?(/>/) then case when ss.skip(/\>\=/) then action { result :arg_state, :tGEQ, ">=" } when ss.skip(/\>\>=/) then action { result EXPR_BEG, :tOP_ASGN, ">>" } when ss.skip(/\>\>/) then action { result :arg_state, :tRSHFT, ">>" } when ss.skip(/\>/) then action { result :arg_state, :tGT, ">" } end # group />/ when ss.match?(/\`/) then case when expr_fname? && (ss.skip(/\`/)) then action { result(EXPR_END, :tBACK_REF2, "`") } when expr_dot? && (ss.skip(/\`/)) then action { result((cmd_state ? EXPR_CMDARG : EXPR_ARG), :tBACK_REF2, "`") } when ss.skip(/\`/) then action { string STR_XQUOTE, '`'; result(nil, :tXSTRING_BEG, "`") } end # group /\`/ when text = ss.scan(/\?/) then process_questionmark text when ss.match?(/&/) then case when ss.skip(/\&\&\=/) then action { result(EXPR_BEG, :tOP_ASGN, "&&") } when ss.skip(/\&\&/) then action { result(EXPR_BEG, :tANDOP, "&&") } when ss.skip(/\&\=/) then action { result(EXPR_BEG, :tOP_ASGN, "&" ) } when ss.skip(/\&\./) then action { result(EXPR_DOT, :tLONELY, "&.") } when text = ss.scan(/\&/) then process_amper text end # group /&/ when text = ss.scan(/\//) then process_slash text when ss.match?(/\^/) then case when ss.skip(/\^=/) then action { result(EXPR_BEG, :tOP_ASGN, "^") } when ss.skip(/\^/) then action { result(:arg_state, :tCARET, "^") } end # group /\^/ when ss.skip(/\;/) then action { self.command_start = true; result(EXPR_BEG, :tSEMI, ";") } when ss.match?(/~/) then case when is_after_operator? && (ss.skip(/\~@/)) then action { result(:arg_state, :tTILDE, "~") } when ss.skip(/\~/) then action { result(:arg_state, :tTILDE, "~") } end # group /~/ when ss.match?(/\\/) then case when ss.skip(/\\\r?\n/) then action { self.lineno += 1; self.space_seen = true; next } when ss.skip(/\\/) then action { rb_compile_error "bare backslash only allowed before newline" } end # group /\\/ when text = ss.scan(/\%/) then process_percent text when ss.match?(/\$/) 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(/\$[^[:ascii:]]+/) 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 ss.skip(/\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}) at #{location}: '#{text}'" end else raise ScanError, "undefined state at #{location}: '#{state}'" end # token = case state next unless token # allow functions to trigger redo w/ nil end # while raise LexerError, "bad lexical result at #{location}: #{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
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# File 'lib/ruby_lexer.rb', line 468 def not_end? not is_end? end |
#old_lineno= ⇒ Object
:startdoc:
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# File 'lib/ruby_lexer.rb', line 1437 def lineno=(value) @lineno = value end |
#parse(str) ⇒ Object
Parse the given string.
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# File 'lib/ruby_lexer.rex.rb', line 82 def parse str self.ss = scanner_class.new str self.state ||= nil do_parse end |
#parse_file(path) ⇒ Object
Read in and parse the file at path
.
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# File 'lib/ruby_lexer.rex.rb', line 92 def parse_file path self.filename = path open path do |f| parse f.read end end |
#parse_quote ⇒ Object
TODO: remove / rewrite
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# File 'lib/ruby_lexer.rb', line 1318 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 eat_whitespace [:tWORDS_BEG, STR_DQUOTE | STR_FUNC_QWORDS] when 'w' then eat_whitespace [: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 eat_whitespace [:tSYMBOLS_BEG, STR_DQUOTE | STR_FUNC_QWORDS] when 'i' then eat_whitespace [: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
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# File 'lib/ruby_lexer.rb', line 1375 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 eat_whitespace 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 self.command_start = true 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 |
#possibly_escape_string(text, check) ⇒ Object
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# File 'lib/ruby_lexer.rb', line 841 def possibly_escape_string text, check content = match[1] if text =~ check then content.gsub(ESC) { unescape $1 } else content.gsub(/\\\\/, "\\").gsub(/\\'/, "'") end end |
#process_amper(text) ⇒ Object
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# File 'lib/ruby_lexer.rb', line 472 def process_amper text token = if is_arg? && space_seen && !check(/\s/) then warning("`&' interpreted as argument prefix") :tAMPER elsif lex_state =~ EXPR_BEG|EXPR_MID then :tAMPER else :tAMPER2 end return result(:arg_state, token, "&") end |
#process_backref(text) ⇒ Object
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# File 'lib/ruby_lexer.rb', line 485 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
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# File 'lib/ruby_lexer.rb', line 491 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_brace_close(text) ⇒ Object
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# File 'lib/ruby_lexer.rb', line 505 def process_brace_close text # matching compare/parse23.y:8561 cond.lexpop cmdarg.lexpop case matched when "}" then self.brace_nest -= 1 self.lex_state = EXPR_ENDARG # TODO: EXPR_END ? Look at 2.6 return :tSTRING_DEND, matched if brace_nest < 0 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_brace_open(text) ⇒ Object
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# File 'lib/ruby_lexer.rb', line 554 def process_brace_open text # matching compare/parse23.y:8694 self.brace_nest += 1 if lambda_beginning? then self.lpar_beg = nil self.paren_nest -= 1 # close arg list when lambda opens body return expr_result(:tLAMBEG, "{") end token = case when lex_state =~ EXPR_LABELED then :tLBRACE # hash when lex_state =~ EXPR_ARG_ANY|EXPR_END|EXPR_ENDFN then :tLCURLY # block (primary) '{' in parse.y when lex_state =~ EXPR_ENDARG then :tLBRACE_ARG # block (expr) else :tLBRACE # hash end state = token == :tLBRACE_ARG ? EXPR_BEG : EXPR_PAR self.command_start = true if token != :tLBRACE cond.push false cmdarg.push false result state, token, text end |
#process_colon1(text) ⇒ Object
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# File 'lib/ruby_lexer.rb', line 530 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
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# File 'lib/ruby_lexer.rb', line 546 def process_colon2 text if is_beg? || lex_state =~ EXPR_CLASS || is_space_arg? then result EXPR_BEG, :tCOLON3, text else result EXPR_DOT, :tCOLON2, text end end |
#process_float(text) ⇒ Object
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# File 'lib/ruby_lexer.rb', line 584 def process_float text rb_compile_error "Invalid numeric format" if text =~ /__/ case when text.end_with?('ri') return result EXPR_NUM, :tIMAGINARY, Complex(0, Rational(text.chop.chop)) when text.end_with?('i') return result EXPR_NUM, :tIMAGINARY, Complex(0, text.chop.to_f) when text.end_with?('r') return result EXPR_NUM, :tRATIONAL, Rational(text.chop) else return result EXPR_NUM, :tFLOAT, text.to_f end end |
#process_gvar(text) ⇒ Object
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# File 'lib/ruby_lexer.rb', line 599 def process_gvar text text.lineno = self.lineno result EXPR_END, :tGVAR, text end |
#process_gvar_oddity(text) ⇒ Object
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# File 'lib/ruby_lexer.rb', line 604 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
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# File 'lib/ruby_lexer.rb', line 609 def process_ivar text tok_id = text =~ /^@@/ ? :tCVAR : :tIVAR text.lineno = self.lineno result EXPR_END, tok_id, text end |
#process_label(text) ⇒ Object
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# File 'lib/ruby_lexer.rb', line 874 def process_label text symbol = possibly_escape_string text, /^"/ result EXPR_LAB, :tLABEL, [symbol, self.lineno] end |
#process_label_or_string(text) ⇒ Object
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# File 'lib/ruby_lexer.rb', line 862 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
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# File 'lib/ruby_lexer.rb', line 615 def process_lchevron text if (lex_state !~ EXPR_DOT|EXPR_CLASS && !is_end? && (!is_arg? || lex_state =~ EXPR_LABELED || space_seen)) then tok = self.heredoc_identifier return tok if tok end if is_after_operator? then self.lex_state = EXPR_ARG else self.command_start = true if lex_state =~ EXPR_CLASS self.lex_state = EXPR_BEG end return result(lex_state, :tLSHFT, "\<\<") end |
#process_newline_or_comment(text) ⇒ Object
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# File 'lib/ruby_lexer.rb', line 633 def process_newline_or_comment text c = matched hit = false if c == '#' then ss.pos -= 1 # TODO: handle magic comments 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+/) c = (lex_state =~ EXPR_BEG|EXPR_CLASS|EXPR_FNAME|EXPR_DOT && lex_state !~ EXPR_LABELED) # TODO: figure out what token_seen is for if c || self.lex_state == EXPR_LAB then # yes, == EXPR_LAB # ignore if !fallthrough? if !c && parser.in_kwarg then # normal newline self.command_start = true return result EXPR_BEG, :tNL, nil else return # skip end end 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
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# File 'lib/ruby_lexer.rb', line 681 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
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# File 'lib/ruby_lexer.rb', line 686 def process_paren text token = if is_beg? then :tLPAREN elsif !space_seen then # foo( ... ) => method call, no ambiguity :tLPAREN2 elsif is_space_arg? then :tLPAREN_ARG elsif lex_state =~ EXPR_ENDFN && !lambda_beginning? then # TODO: # warn("parentheses after method name is interpreted as " \ # "an argument list, not a decomposed argument") :tLPAREN2 else :tLPAREN2 # plain '(' in parse.y end self.paren_nest += 1 cond.push false cmdarg.push false result EXPR_PAR, token, text end |
#process_percent(text) ⇒ Object
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# File 'lib/ruby_lexer.rb', line 710 def process_percent text return parse_quote if is_beg? return result EXPR_BEG, :tOP_ASGN, "%" if scan(/\=/) return parse_quote if is_space_arg?(check(/\s/)) || (lex_state =~ EXPR_FITEM && check(/s/)) return result :arg_state, :tPERCENT, "%" end |
#process_plus_minus(text) ⇒ Object
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# File 'lib/ruby_lexer.rb', line 720 def process_plus_minus text sign = matched utype, type = if sign == "+" then [:tUPLUS, :tPLUS] else [:tUMINUS, :tMINUS] end if is_after_operator? 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 result EXPR_BEG, type, sign end |
#process_questionmark(text) ⇒ Object
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# File 'lib/ruby_lexer.rb', line 752 def process_questionmark text if is_end? then return result EXPR_BEG, :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 return result EXPR_BEG, :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 result EXPR_END, :tSTRING, c end |
#process_slash(text) ⇒ Object
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# File 'lib/ruby_lexer.rb', line 790 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
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# File 'lib/ruby_lexer.rb', line 812 def process_square_bracket text self.paren_nest += 1 token = nil if is_after_operator? 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 || lex_state =~ EXPR_LABELED) then token = :tLBRACK else token = :tLBRACK2 end cond.push false cmdarg.push false result EXPR_PAR, token, text end |
#process_string ⇒ Object
TODO: rewrite / remove
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# File 'lib/ruby_lexer.rb', line 1290 def process_string # TODO: rewrite / remove # matches top of parser_yylex in compare/parse23.y:8113 token = if lex_strterm[0] == :heredoc then self.heredoc lex_strterm else self.parse_string lex_strterm end token_type, c = token # matches parser_string_term if ruby22plus? && token_type == :tSTRING_END && ["'", '"'].include?(c) then if ((lex_state =~ EXPR_BEG|EXPR_ENDFN && !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_PAR : EXPR_END end return token end |
#process_symbol(text) ⇒ Object
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# File 'lib/ruby_lexer.rb', line 851 def process_symbol text symbol = possibly_escape_string text, /^:"/ result EXPR_END, :tSYMBOL, symbol end |
#process_token(text) ⇒ Object
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# File 'lib/ruby_lexer.rb', line 880 def process_token text # matching: parse_ident in compare/parse23.y:7989 # TODO: make this always return [token, lineno] # FIX: remove: self.last_state = lex_state token = self.token = text token << matched if scan(/[\!\?](?!=)/) tok_id = case when token =~ /[!?]$/ then :tFID when 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 is_label_possible? and is_label_suffix? then scan(/:/) return result EXPR_LAB, :tLABEL, [token, self.lineno] end # TODO: mb == ENC_CODERANGE_7BIT && lex_state !~ EXPR_DOT if lex_state !~ EXPR_DOT then # See if it is a reserved word. keyword = RubyParserStuff::Keyword.keyword token return process_token_keyword keyword if keyword end # matching: compare/parse23.y:8079 state = if is_beg? or is_arg? or lex_state =~ EXPR_DOT then cmd_state ? EXPR_CMDARG : EXPR_ARG elsif lex_state =~ EXPR_FNAME then EXPR_ENDFN else EXPR_END end if last_state !~ EXPR_DOT|EXPR_FNAME and (tok_id == :tIDENTIFIER) and # not EXPR_FNAME, not attrasgn lvar_defined?(token) then state = EXPR_END|EXPR_LABEL 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
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# File 'lib/ruby_lexer.rb', line 936 def process_token_keyword keyword # matching MIDDLE of parse_ident in compare/parse23.y:8046 state = lex_state self.lex_state = keyword.state value = [token, self.lineno] return result(lex_state, keyword.id0, value) if state =~ EXPR_FNAME self.command_start = true if lex_state =~ EXPR_BEG case when keyword.id0 == :kDO then case when lambda_beginning? then self.lpar_beg = nil # lambda_beginning? == FALSE in the body of "-> do ... end" self.paren_nest -= 1 result lex_state, :kDO_LAMBDA, value when cond.is_in_state then result lex_state, :kDO_COND, value when cmdarg.is_in_state && state != EXPR_CMDARG then result lex_state, :kDO_BLOCK, value when state =~ EXPR_BEG|EXPR_ENDARG then result lex_state, :kDO_BLOCK, value else result lex_state, :kDO, value end when state =~ EXPR_PAD then result lex_state, keyword.id0, value when keyword.id0 != keyword.id1 then result EXPR_PAR, keyword.id1, value else result lex_state, keyword.id1, value end end |
#process_underscore(text) ⇒ Object
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# File 'lib/ruby_lexer.rb', line 972 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
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# File 'lib/ruby_lexer.rb', line 982 def rb_compile_error msg msg += ". near line #{self.lineno}: #{ss.rest[/^.*/].inspect}" raise RubyParser::SyntaxError, msg end |
#read_escape ⇒ Object
TODO: remove / rewrite
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# File 'lib/ruby_lexer.rb', line 987 def read_escape # TODO: remove / rewrite case when scan(/\\/) then # Backslash '\\' when scan(/n/) then # newline self.extra_lineno -= 1 "\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.force_encoding Encoding::UTF_8 when scan(/x([0-9a-fA-F]{1,2})/) then # hex constant # TODO: force encode everything to UTF-8? ss[1].to_i(16).chr.force_encoding Encoding::UTF_8 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]{4}|\{[0-9a-fA-F]{2,6}\})/) then [ss[1].delete("{}").to_i(16)].pack("U") when scan(/u([0-9a-fA-F]{1,3})/) then rb_compile_error "Invalid escape character syntax" when scan(/[McCx0-9]/) || end_of_stream? then rb_compile_error("Invalid escape character syntax") else ss.getch end.dup end |
#regx_options ⇒ Object
TODO: rewrite / remove
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# File 'lib/ruby_lexer.rb', line 1048 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
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# File 'lib/ruby_lexer.rb', line 1063 def reset self.brace_nest = 0 self.command_start = true self.comments = [] self.lex_state = EXPR_NONE 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.cond.reset self.cmdarg.reset end |
#result(new_state, token, text) ⇒ Object
:nodoc:
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# File 'lib/ruby_lexer.rb', line 1081 def result new_state, token, text # :nodoc: new_state = self.arg_state if new_state == :arg_state self.lex_state = new_state if new_state [token, text] end |
#ruby22_label? ⇒ Boolean
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# File 'lib/ruby_lexer.rb', line 444 def ruby22_label? ruby22plus? and is_label_possible? end |
#ruby22plus? ⇒ Boolean
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# File 'lib/ruby_lexer.rb', line 1282 def ruby22plus? parser.class.version >= 22 end |
#ruby23plus? ⇒ Boolean
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# File 'lib/ruby_lexer.rb', line 1286 def ruby23plus? parser.class.version >= 23 end |
#scan(re) ⇒ Object
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# File 'lib/ruby_lexer.rb', line 1087 def scan re ss.scan re end |
#scanner_class ⇒ Object
The current scanner class. Must be overridden in subclasses.
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# File 'lib/ruby_lexer.rb', line 1106 def scanner_class # TODO: design this out of oedipus_lex. or something. RPStringScanner end |
#space_vs_beginning(space_type, beg_type, fallback) ⇒ Object
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# File 'lib/ruby_lexer.rb', line 1110 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
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# File 'lib/ruby_lexer.rb', line 1122 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
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# File 'lib/ruby_lexer.rb', line 1132 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 chr = ss[1] prev = self.string_buffer.last if term == chr && prev && prev.end_with?("(?") then self.string_buffer << chr elsif term == chr || chr.ascii_only? then self.string_buffer << matched # dunno why we keep them for ascii else self.string_buffer << chr # HACK? this is such a rat's nest end else rb_compile_error "Invalid escape character syntax" end end |
#tokadd_string(func, term, paren) ⇒ Object
TODO: rewrite / remove
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# File 'lib/ruby_lexer.rb', line 1160 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 # TODO: this seems wrong 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 /[^#{t}#{x}\#\0\\\s]+|./ # |. to pick up whatever 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
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# File 'lib/ruby_lexer.rb', line 1247 def unescape s r = ESCAPES[s] self.extra_lineno += 1 if s == "\n" # eg backslash newline strings self.extra_lineno -= 1 if r && s == "n" # literal \n, not newline 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]{4}|\{[0-9a-fA-F]{2,6}\})/ then [$1.delete("{}").to_i(16)].pack("U") when /u([0-9a-fA-F]{1,3})/ then rb_compile_error("Invalid escape character syntax") else s end x end |
#warning(s) ⇒ Object
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# File 'lib/ruby_lexer.rb', line 1278 def warning s # do nothing for now end |
#was_label? ⇒ Boolean
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# File 'lib/ruby_lexer.rb', line 857 def was_label? @was_label = ruby22_label? true end |