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module CodeRay
module Scanners
module Ruby::Patterns # :nodoc:
RESERVED_WORDS = %w[
and def end in or unless begin
defined? ensure module redo super until
BEGIN break do next rescue then
when END case else for retry
while alias class elsif if not return
undef yield
]
DEF_KEYWORDS = %w[ def ]
UNDEF_KEYWORDS = %w[ undef ]
ALIAS_KEYWORDS = %w[ alias ]
MODULE_KEYWORDS = %w[class module]
DEF_NEW_STATE = WordList.new(:initial).
add(DEF_KEYWORDS, :def_expected).
add(UNDEF_KEYWORDS, :undef_expected).
add(ALIAS_KEYWORDS, :alias_expected).
add(MODULE_KEYWORDS, :module_expected)
PREDEFINED_CONSTANTS = %w[
nil true false self
DATA ARGV ARGF __FILE__ __LINE__
]
IDENT_KIND = WordList.new(:ident).
add(RESERVED_WORDS, :reserved).
add(PREDEFINED_CONSTANTS, :pre_constant)
IDENT = /[a-z_][\w_]*/i
METHOD_NAME = / #{IDENT} [?!]? /ox
METHOD_NAME_OPERATOR = /
\*\*? # multiplication and power
| [-+~]@? # plus, minus, tilde with and without @
| [\/%&|^`] # division, modulo or format strings, &and, |or, ^xor, `system`
| \[\]=? # array getter and setter
| << | >> # append or shift left, shift right
| <=?>? | >=? # comparison, rocket operator
| ===? | =~ # simple equality, case equality, match
| ![~=@]? # negation with and without @, not-equal and not-match
/ox
METHOD_NAME_EX = / #{IDENT} (?:[?!]|=(?!>))? | #{METHOD_NAME_OPERATOR} /ox
INSTANCE_VARIABLE = / @ #{IDENT} /ox
CLASS_VARIABLE = / @@ #{IDENT} /ox
OBJECT_VARIABLE = / @@? #{IDENT} /ox
GLOBAL_VARIABLE = / \$ (?: #{IDENT} | [1-9]\d* | 0\w* | [~&+`'=\/,;_.<>!@$?*":\\] | -[a-zA-Z_0-9] ) /ox
PREFIX_VARIABLE = / #{GLOBAL_VARIABLE} | #{OBJECT_VARIABLE} /ox
VARIABLE = / @?@? #{IDENT} | #{GLOBAL_VARIABLE} /ox
QUOTE_TO_TYPE = {
'`' => :shell,
'/'=> :regexp,
}
QUOTE_TO_TYPE.default = :string
REGEXP_MODIFIERS = /[mixounse]*/
REGEXP_SYMBOLS = /[|?*+?(){}\[\].^$]/
DECIMAL = /\d+(?:_\d+)*/
OCTAL = /0_?[0-7]+(?:_[0-7]+)*/
HEXADECIMAL = /0x[0-9A-Fa-f]+(?:_[0-9A-Fa-f]+)*/
BINARY = /0b[01]+(?:_[01]+)*/
EXPONENT = / [eE] [+-]? #{DECIMAL} /ox
FLOAT_SUFFIX = / #{EXPONENT} | \. #{DECIMAL} #{EXPONENT}? /ox
FLOAT_OR_INT = / #{DECIMAL} (?: #{FLOAT_SUFFIX} () )? /ox
NUMERIC = / (?: (?=0) (?: #{OCTAL} | #{HEXADECIMAL} | #{BINARY} ) | #{FLOAT_OR_INT} ) /ox
SYMBOL = /
:
(?:
#{METHOD_NAME_EX}
| #{PREFIX_VARIABLE}
| ['"]
)
/ox
METHOD_NAME_OR_SYMBOL = / #{METHOD_NAME_EX} | #{SYMBOL} /ox
# TODO investigste \M, \c and \C escape sequences
# (?: M-\\C-|C-\\M-|M-\\c|c\\M-|c|C-|M-)? (?: \\ (?: [0-7]{3} | x[0-9A-Fa-f]{2} | . ) )
# assert_equal(225, ?\M-a)
# assert_equal(129, ?\M-\C-a)
ESCAPE = /
[abefnrstv]
| M-\\C-|C-\\M-|M-\\c|c\\M-|c|C-|M-
| [0-7]{1,3}
| x[0-9A-Fa-f]{1,2}
| .
/mx
CHARACTER = /
\?
(?:
[^\s\\]
| \\ #{ESCAPE}
)
/mx
# NOTE: This is not completely correct, but
# nobody needs heredoc delimiters ending with \n.
HEREDOC_OPEN = /
<< (-)? # $1 = float
(?:
( [A-Za-z_0-9]+ ) # $2 = delim
|
( ["'`\/] ) # $3 = quote, type
( [^\n]*? ) \3 # $4 = delim
)
/mx
RUBYDOC = /
=begin (?!\S)
.*?
(?: \Z | ^=end (?!\S) [^\n]* )
/mx
DATA = /
__END__$
.*?
(?: \Z | (?=^\#CODE) )
/mx
# Checks for a valid value to follow. This enables
# value_expected in method calls without parentheses.
VALUE_FOLLOWS = /
(?>[ \t\f\v]+)
(?:
[%\/][^\s=]
| <<-?\S
| [-+] \d
| #{CHARACTER}
)
/x
RUBYDOC_OR_DATA = / #{RUBYDOC} | #{DATA} /xo
RDOC_DATA_START = / ^=begin (?!\S) | ^__END__$ /x
# FIXME: \s and = are only a workaround, they are still allowed
# as delimiters.
FANCY_START_SAVE = / % ( [qQwWxsr] | (?![a-zA-Z0-9\s=]) ) ([^a-zA-Z0-9]) /mx
FANCY_START_CORRECT = / % ( [qQwWxsr] | (?![a-zA-Z0-9]) ) ([^a-zA-Z0-9]) /mx
FancyStringType = {
'q' => [:string, false],
'Q' => [:string, true],
'r' => [:regexp, true],
's' => [:symbol, false],
'x' => [:shell, true]
}
FancyStringType['w'] = FancyStringType['q']
FancyStringType['W'] = FancyStringType[''] = FancyStringType['Q']
class StringState < Struct.new :type, :interpreted, :delim, :heredoc,
:paren, :paren_depth, :pattern, :next_state
CLOSING_PAREN = Hash[ *%w[
( )
[ ]
< >
{ }
] ]
CLOSING_PAREN.each { |k,v| k.freeze; v.freeze } # debug, if I try to change it with <<
OPENING_PAREN = CLOSING_PAREN.invert
STRING_PATTERN = Hash.new { |h, k|
delim, interpreted = *k
delim_pattern = Regexp.escape(delim)
if closing_paren = CLOSING_PAREN[delim]
delim_pattern = delim_pattern[0..-1] if defined? JRUBY_VERSION # JRuby fix
delim_pattern << Regexp.escape(closing_paren)
end
special_escapes =
case interpreted
when :regexp_symbols
'| ' + REGEXP_SYMBOLS.source
when :words
'| \s'
end
h[k] =
if interpreted and not delim == '#'
/ (?= [#{delim_pattern}\\] | \# [{$@] #{special_escapes} ) /mx
else
/ (?= [#{delim_pattern}\\] #{special_escapes} ) /mx
end
}
HEREDOC_PATTERN = Hash.new { |h, k|
delim, interpreted, indented = *k
delim_pattern = Regexp.escape(delim.dup)
delim_pattern = / \n #{ '(?>[\ \t]*)' if indented } #{ Regexp.new delim_pattern } $ /x
h[k] =
if interpreted
/ (?= #{delim_pattern}() | \\ | \# [{$@] ) /mx # $1 set == end of heredoc
else
/ (?= #{delim_pattern}() | \\ ) /mx
end
}
def initialize kind, interpreted, delim, heredoc = false
if heredoc
pattern = HEREDOC_PATTERN[ [delim, interpreted, heredoc == :indented] ]
delim = nil
else
pattern = STRING_PATTERN[ [delim, interpreted] ]
if paren = CLOSING_PAREN[delim]
delim, paren = paren, delim
paren_depth = 1
end
end
super kind, interpreted, delim, heredoc, paren, paren_depth, pattern, :initial
end
end unless defined? StringState
end
end
end
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