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module CodeRay module Scanners
class Mush < Scanner
register_for :mush
RESERVED_WORDS = [
]
IDENT_KIND = Scanner::WordList.new(:ident, :case_ignore).
add(RESERVED_WORDS, :reserved).
add(DIRECTIVES, :directive)
def scan_tokens tokens, options
state = :initial
until eos?
kind = :error
match = nil
if state == :initial
if scan(/ \s+ /x)
kind = :space
elsif scan(%r! \{ \$ [^}]* \}? | \(\* \$ (?: .*? \*\) | .* ) !mx)
kind = :preprocessor
elsif scan(%r! // [^\n]* | \{ [^}]* \}? | \(\* (?: .*? \*\) | .* ) !mx)
kind = :comment
elsif scan(/ [-+*\/=<>:;,.@\^|\(\)\[\]]+ /x)
kind = :operator
elsif match = scan(/ [A-Za-z_][A-Za-z_0-9]* /x)
kind = IDENT_KIND[match]
elsif match = scan(/ ' ( [^\n']|'' ) (?:'|$) /x)
tokens << [:open, :char]
tokens << ["'", :delimiter]
tokens << [self[1], :content]
tokens << ["'", :delimiter]
tokens << [:close, :char]
next
elsif match = scan(/ ' /x)
tokens << [:open, :string]
state = :string
kind = :delimiter
elsif scan(/ \# (?: \d+ | \$[0-9A-Fa-f]+ ) /x)
kind = :char
elsif scan(/ \$ [0-9A-Fa-f]+ /x)
kind = :hex
elsif scan(/ (?: \d+ ) (?![eE]|\.[^.]) /x)
kind = :integer
elsif scan(/ \d+ (?: \.\d+ (?: [eE][+-]? \d+ )? | [eE][+-]? \d+ ) /x)
kind = :float
else
getch
end
elsif state == :string
if scan(/[^\n']+/)
kind = :content
elsif scan(/''/)
kind = :char
elsif scan(/'/)
tokens << ["'", :delimiter]
tokens << [:close, :string]
state = :initial
next
elsif scan(/\n/)
state = :initial
else
raise "else case \' reached; %p not handled." % peek(1), tokens
end
else
raise 'else-case reached', tokens
end
match ||= matched
raise [match, kind], tokens if kind == :error
tokens << [match, kind]
end
tokens
end
end
end end
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