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|
module CodeRay module Scanners
class Ruby < Scanner
register_for :rubyfast
RESERVED_WORDS = [
'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 = ['def']
MODULE_KEYWORDS = ['class', 'module']
DEF_NEW_STATE = WordList.new(:initial).
add(DEF_KEYWORDS, :def_expected).
add(MODULE_KEYWORDS, :module_expected)
WORDS_ALLOWING_REGEXP = [
'and', 'or', 'not', 'while', 'until', 'unless', 'if', 'elsif', 'when'
]
REGEXP_ALLOWED = WordList.new(false).
add(WORDS_ALLOWING_REGEXP, :set)
PREDEFINED_CONSTANTS = [
'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-zA-Z_][a-zA-Z_0-9]*/
METHOD_NAME = / #{IDENT} [?!]? /xo
METHOD_NAME_EX = /
#{IDENT}[?!=]? # common methods: split, foo=, empty?, gsub!
| \*\*? # multiplication and power
| [-+~]@? # plus, minus
| [\/%&|^`] # division, modulo or format strings, &and, |or, ^xor, `system`
| \[\]=? # array getter and setter
| <=?>? | >=? # comparison, rocket operator
| << | >> # append or shift left, shift right
| ===? # simple equality and case equality
/ox
GLOBAL_VARIABLE = / \$ (?: #{IDENT} | [1-9] | 0[a-zA-Z_0-9]* | [~&+`'=\/,;_.<>!@$?*":\\] | -[a-zA-Z_0-9] ) /ox
DOUBLEQ = / " [^"\#\\]* (?: (?: \#\{.*?\} | \#(?:$")? | \\. ) [^"\#\\]* )* "? /mox
SINGLEQ = / ' [^'\\]* (?: \\. [^'\\]* )* '? /mox
STRING = / #{SINGLEQ} | #{DOUBLEQ} /ox
SHELL = / ` [^`\#\\]* (?: (?: \#\{.*?\} | \#(?:$`)? | \\. ) [^`\#\\]* )* `? /mox
REGEXP =%r! / [^/\#\\]* (?: (?: \#\{.*?\} | \#(?:$/)? | \\. ) [^/\#\\]* )* /? !mox
DECIMAL = /\d+(?:_\d+)*/ # doesn't recognize 09 as octal error
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 = / #{DECIMAL} (?: #{EXPONENT} | \. #{DECIMAL} #{EXPONENT}? ) /
INTEGER = /#{OCTAL}|#{HEXADECIMAL}|#{BINARY}|#{DECIMAL}/
ESCAPE_STRING = /
% (?!\s)
(?:
[qsw]
(?:
\( [^\)\\]* (?: \\. [^\)\\]* )* \)?
|
\[ [^\]\\]* (?: \\. [^\]\\]* )* \]?
|
\{ [^\}\\]* (?: \\. [^\}\\]* )* \}?
|
\< [^\>\\]* (?: \\. [^\>\\]* )* \>?
|
\\ [^\\ ]* \\?
|
( [^a-zA-Z0-9] ) # $1
(?:(?!\1)[^\\])* (?: \\. (?:(?!\1)[^\#\\])* )* \1?
)
|
[QrxWr]?
(?:
\( [^\)\#\\]* (?: (?:\#\{.*?\}|\#|\\.) [^\)\#\\]* )* \)?
|
\[ [^\]\#\\]* (?: (?:\#\{.*?\}|\#|\\.) [^\]\#\\]* )* \]?
|
\{ [^\}\#\\]* (?: (?:\#\{.*?\}|\#|\\.) [^\}\#\\]* )* \}?
|
\< [^\>\#\\]* (?: (?:\#\{.*?\}|\#|\\.) [^\>\#\\]* )* \>?
|
\# [^\# \\]* (?: \\. [^\# \\]* )* \#?
|
\\ [^\\\# ]* (?: (?:\#\{.*?\}|\# ) [^\\\# ]* )* \\?
|
( [^a-zA-Z0-9] ) # $2
(?:(?!\2)[^\#\\])* (?: (?:\#\{.*?\}|\#|\\.) (?:(?!\2)[^\#\\])* )* \2?
)
)
/mox
SYMBOL = /
:
(?:
#{GLOBAL_VARIABLE}
| @@?#{IDENT}
| #{METHOD_NAME_EX}
| #{STRING}
)/ox
HEREDOC = /
<< (?! [\dc] )
(?: [^\n]*? << )?
(?:
([a-zA-Z_0-9]+)
(?: .*? ^\1$ | .* )
|
-([a-zA-Z_0-9]+)
(?: .*? ^\s*\2$ | .* )
|
(["\'`]) (.*?) \3
(?: .*? ^\4$ | .* )
|
- (["\'`]) (.*?) \5
(?: .*? ^\s*\6$ | .* )
)
/mx
RDOC = /
=begin (?!\S) [^\n]* \n?
(?:
(?! =end (?!\S) )
[^\n]* \n?
)*
(?:
=end (?!\S) [^\n]*
)?
/mx
DATA = /
__END__\n
(?:
(?=\#CODE)
|
.*
)
/
private
def scan_tokens tokens, options
state = :initial
regexp_allowed = true
last_token_dot = false
until eos?
match = nil
kind = :error
if scan(/\s+/) # in every state
kind = :space
regexp_allowed = :set if regexp_allowed or matched.index(?\n) # delayed flag setting
elsif scan(/ \#[^\n]* /x) # in every state
kind = :comment
regexp_allowed = :set if regexp_allowed
elsif state == :initial
# IDENTIFIERS, KEYWORDS
if scan(GLOBAL_VARIABLE)
kind = :global_variable
elsif scan(/ @@ #{IDENT} /ox)
kind = :class_variable
elsif scan(/ @ #{IDENT} /ox)
kind = :instance_variable
elsif scan(/ #{DATA} | #{RDOC} /ox)
kind = :comment
elsif scan(METHOD_NAME)
match = matched
if last_token_dot
kind =
if match[/^[A-Z]/]
:constant
else
:ident
end
else
kind = IDENT_KIND[match]
if kind == :ident and match[/^[A-Z]/]
kind = :constant
elsif kind == :reserved
state = DEF_NEW_STATE[match]
regexp_allowed = REGEXP_ALLOWED[match]
end
end
elsif scan(STRING)
kind = :string
elsif scan(SHELL)
kind = :shell
elsif scan(HEREDOC)
kind = :string
elsif check(/\//) and regexp_allowed
scan(REGEXP)
kind = :regexp
elsif scan(ESCAPE_STRING)
match = matched
kind =
case match[0]
when ?s
:symbol
when ?r
:regexp
when ?x
:shell
else
:string
end
elsif scan(/:(?:#{GLOBAL_VARIABLE}|#{METHOD_NAME_EX}|#{STRING})/ox)
kind = :symbol
elsif scan(/
\? (?:
[^\s\\]
|
\\ (?:M-\\C-|C-\\M-|M-\\c|c\\M-|c|C-|M-))? (?: \\ (?: . | [0-7]{3} | x[0-9A-Fa-f][0-9A-Fa-f] )
)
/mx)
kind = :integer
elsif scan(/ [-+*\/%=<>;,|&!()\[\]{}~?] | \.\.?\.? | ::? /x)
kind = :operator
match = matched
regexp_allowed = :set if match[-1,1] =~ /[~=!<>|&^,\(\[+\-\/\*%]\z/
last_token_dot = :set if match == '.' or match == '::'
elsif scan(FLOAT)
kind = :float
elsif scan(INTEGER)
kind = :integer
else
getch
end
elsif state == :def_expected
if scan(/ (?:#{IDENT}::)* (?:#{IDENT}\.)? #{METHOD_NAME_EX} /ox)
kind = :method
else
getch
end
state = :initial
elsif state == :module_expected
if scan(/<</)
kind = :operator
else
if scan(/ (?:#{IDENT}::)* #{IDENT} /ox)
kind = :method
else
getch
end
state = :initial
end
end
text = match || matched
if kind == :regexp and not eos?
text << scan(/[eimnosux]*/)
end
regexp_allowed = (regexp_allowed == :set) # delayed flag setting
last_token_dot = last_token_dot == :set
tokens << [text, kind]
end
tokens
end
end
end end
|
