1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
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
|
module CodeRay module Scanners
class Ruby
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 ]
MODULE_KEYWORDS = %w[class module]
DEF_NEW_STATE = WordList.new(:initial).
add(DEF_KEYWORDS, :def_expected).
add(UNDEF_KEYWORDS, :undef_expected).
add(MODULE_KEYWORDS, :module_expected)
IDENTS_ALLOWING_REGEXP = %w[
and or not while until unless if then elsif when sub sub! gsub gsub! scan slice slice! split
]
REGEXP_ALLOWED = WordList.new(false).
add(IDENTS_ALLOWING_REGEXP, :set)
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
| [\/%&|^`~] # division, modulo or format strings, &and, |or, ^xor, `system`, tilde
| \[\]=? # array getter and setter
| << | >> # append or shift left, shift right
| <=?>? | >=? # comparison, rocket operator
| ===? # simple equality and case equality
/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
# 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
RUBYDOC_OR_DATA = / #{RUBYDOC} | #{DATA} /xo
RDOC_DATA_START = / ^=begin (?!\S) | ^__END__$ /x
FANCY_START = / % ( [qQwWxsr] | (?![\w\s=]) ) (.) /mox
FancyStringType = {
'q' => [:string, false],
'Q' => [:string, true],
'r' => [:regexp, true],
's' => [:symbol, false],
'x' => [:shell, true],
'w' => [:string, :word],
'W' => [:string, :word],
}
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.values.each { |o| o.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.dup)
if starter = OPENING_PAREN[delim]
delim_pattern << Regexp.escape(starter)
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 paren = CLOSING_PAREN[delim]
delim, paren = paren, delim
paren_depth = 1
end
if heredoc
pattern = HEREDOC_PATTERN[ [delim, interpreted, heredoc == :indented] ]
delim = nil
else
pattern = STRING_PATTERN[ [delim, interpreted] ]
end
super kind, interpreted, delim, heredoc, paren, paren_depth, pattern, :initial
end
end unless defined? StringState
end
end end
|
