/usr/lib/ruby/vendor_ruby/ruby_lexer.rb is in ruby-parser 3.6.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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class RubyLexer
# :stopdoc:
RUBY19 = "".respond_to? :encoding
IDENT_CHAR = if RUBY19 then
/[\w\u0080-\u{10ffff}]/u
else
/[\w\x80-\xFF]/n
end
EOF = :eof_haha!
# ruby constants for strings (should this be moved somewhere else?)
STR_FUNC_BORING = 0x00
STR_FUNC_ESCAPE = 0x01 # TODO: remove and replace with REGEXP
STR_FUNC_EXPAND = 0x02
STR_FUNC_REGEXP = 0x04
STR_FUNC_QWORDS = 0x08
STR_FUNC_SYMBOL = 0x10
STR_FUNC_INDENT = 0x20 # <<-HEREDOC
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,
}
@@regexp_cache = Hash.new { |h,k| h[k] = Regexp.new(Regexp.escape(k)) }
@@regexp_cache[nil] = nil
# :startdoc:
attr_accessor :brace_nest
attr_accessor :cmdarg
attr_accessor :command_start
attr_accessor :command_state
attr_accessor :last_state
attr_accessor :cond
attr_accessor :extra_lineno
##
# Additional context surrounding tokens that both the lexer and
# grammar use.
attr_accessor :lex_state
attr_accessor :lex_strterm
attr_accessor :lpar_beg
attr_accessor :paren_nest
attr_accessor :parser # HACK for very end of lexer... *sigh*
attr_accessor :space_seen
attr_accessor :string_buffer
attr_accessor :string_nest
# Last token read via next_token.
attr_accessor :token
##
# What version of ruby to parse. 18 and 19 are the only valid values
# currently supported.
attr_accessor :version
attr_writer :comments
def initialize v = 18
self.version = v
reset
end
def arg_ambiguous
self.warning("Ambiguous first argument. make sure.")
end
def arg_state
in_arg_state? ? :expr_arg : :expr_beg
end
def beginning_of_line?
ss.bol?
end
alias :bol? :beginning_of_line? # to make .rex file more readable
def check re
ss.check re
end
def comments # TODO: remove this... maybe comment_string + attr_accessor
c = @comments.join
@comments.clear
c
end
def end_of_stream?
ss.eos?
end
def expr_dot?
lex_state == :expr_dot
end
def expr_fname?
lex_state == :expr_fname
end
def expr_result token, text
cond.push false
cmdarg.push false
result :expr_beg, token, text
end
def heredoc here # TODO: rewrite / remove
_, eos, func, last_line = here
indent = (func & STR_FUNC_INDENT) != 0 ? "[ \t]*" : nil
expand = (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 expand 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
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
def in_fname?
in_lex_state? :expr_fname
end
def in_arg_state? # TODO: rename is_after_operator?
in_lex_state? :expr_fname, :expr_dot
end
def in_lex_state?(*states)
states.include? lex_state
end
def int_with_base base
rb_compile_error "Invalid numeric format" if matched =~ /__/
return result(:expr_end, :tINTEGER, matched.to_i(base))
end
def is_arg?
in_lex_state? :expr_arg, :expr_cmdarg
end
def is_beg?
in_lex_state? :expr_beg, :expr_value, :expr_mid, :expr_class
end
def is_end?
in_lex_state? :expr_end, :expr_endarg, :expr_endfn
end
def is_label_possible?
(in_lex_state?(:expr_beg, :expr_endfn) && !command_state) || is_arg?
end
def is_space_arg? c = "x"
is_arg? and space_seen and c !~ /\s/
end
def matched
ss.matched
end
def not_end?
not is_end?
end
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
def process_backref text
token = ss[1].to_sym
# TODO: can't do lineno hack w/ symbol
result :expr_end, :tBACK_REF, token
end
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
nil # TODO
end
def process_bracing text
cond.lexpop
cmdarg.lexpop
case matched
when "}" then
self.brace_nest -= 1
self.lex_state = :expr_endarg
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
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
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
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
def process_float text
rb_compile_error "Invalid numeric format" if text =~ /__/
return result(:expr_end, :tFLOAT, text.to_f)
end
def process_gvar text
text.lineno = self.lineno
result(:expr_end, :tGVAR, text)
end
def process_gvar_oddity text
result :expr_end, "$", "$" # TODO: wtf is this?
end
def process_ivar text
tok_id = text =~ /^@@/ ? :tCVAR : :tIVAR
text.lineno = self.lineno
return result(:expr_end, tok_id, text)
end
def process_lchevron text
if (!in_lex_state?(:expr_dot, :expr_class) &&
!is_end? &&
(!is_arg? || space_seen)) then
tok = self.heredoc_identifier
return tok if tok
end
return result(:arg_state, :tLSHFT, "\<\<")
end
def process_newline_or_comment text
c = matched
hit = false
if c == '#' then
ss.pos -= 1
while scan(/\s*\#.*(\n+|\z)/) do
hit = true
self.lineno += matched.lines.to_a.size
@comments << matched.gsub(/^ +#/, '#').gsub(/^ +$/, '')
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)
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
def process_nthref text
# TODO: can't do lineno hack w/ number
result :expr_end, :tNTH_REF, ss[1].to_i
end
def process_paren text
token = if ruby18 then
process_paren18
else
process_paren19
end
self.paren_nest += 1
return expr_result(token, "(")
end
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
def process_paren19
if is_beg? then
:tLPAREN
elsif is_space_arg? then
:tLPAREN_ARG
else
:tLPAREN2 # plain '(' in parse.y
end
end
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
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
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
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
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
def process_symbol text
symbol = match[1].gsub(ESC) { unescape $1 }
rb_compile_error "symbol cannot contain '\\0'" if
ruby18 && symbol =~ /\0/
return result(:expr_end, :tSYMBOL, symbol)
end
def process_token text
# TODO: make this always return [token, lineno]
token = self.token = text
token << matched if scan(/[\!\?](?!=)/)
tok_id =
case
when token =~ /[!?]$/ 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 scan(/:(?!:)/) then
return result(:expr_beg, :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
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
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
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
def rb_compile_error msg
msg += ". near line #{self.lineno}: #{ss.rest[/^.*/].inspect}"
raise RubyParser::SyntaxError, msg
end
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
def regx_options # 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
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
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
def ruby18
Ruby18Parser === parser
end
def ruby19
Ruby19Parser === parser
end
def scan re
ss.scan re
end
def scanner_class # TODO: design this out of oedipus_lex. or something.
RPStringScanner
end
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
def string type, beg = matched, nnd = "\0"
self.lex_strterm = [:strterm, type, beg, nnd]
end
# TODO: consider
# def src= src
# raise "bad src: #{src.inspect}" unless String === src
# @src = RPStringScanner.new(src)
# end
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
def tokadd_string(func, term, paren) # TODO: rewrite / remove
qwords = (func & STR_FUNC_QWORDS) != 0
escape = (func & STR_FUNC_ESCAPE) != 0
expand = (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 expand && scan(/#(?=[\$\@\{])/) then
ss.pos -= 1
break
when qwords && scan(/\s/) then
ss.pos -= 1
break
when expand && 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 expand && scan(/\\\n/) then
next
when regexp && check(/\\/) then
self.tokadd_escape term
next
when expand && 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
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
def warning s
# do nothing for now
end
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, _ = token
if token_type == :tSTRING_END || token_type == :tREGEXP_END then
self.lex_strterm = nil
self.lex_state = :expr_end
end
return token
end
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
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
expand = (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.regx_options
else
return :tSTRING_END, term
end
end
return :tSPACE, nil if space
self.string_buffer = []
if expand
case
when scan(/#(?=[$@])/) then
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
end
require "ruby_lexer.rex"
if ENV["DEBUG"] then
class RubyLexer
alias :old_lineno= :lineno=
def d o
$stderr.puts o.inspect
end
def lineno= n
self.old_lineno= n
where = caller.first.split(/:/).first(2).join(":")
d :lineno => [n, where, ss && ss.rest[0,40]]
end
end
end
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