Sha256: 558b09cfee96a7b515efa2f210f35b54ae0d2a6ae0f674c326bf9c593724775e
Contents?: true
Size: 993 Bytes
Versions: 18
Compression:
Stored size: 993 Bytes
Contents
require 'strscan'
module Journey
class Scanner
def initialize
@ss = nil
end
def scan_setup str
@ss = StringScanner.new str
end
def eos?
@ss.eos?
end
def pos
@ss.pos
end
def pre_match
@ss.pre_match
end
def next_token
return if @ss.eos?
until token = scan || @ss.eos?; end
token
end
private
def scan
case
# /
when text = @ss.scan(/\//)
[:SLASH, text]
when text = @ss.scan(/\*/)
[:STAR, text]
when text = @ss.scan(/\(/)
[:LPAREN, text]
when text = @ss.scan(/\)/)
[:RPAREN, text]
when text = @ss.scan(/\|/)
[:OR, text]
when text = @ss.scan(/\./)
[:DOT, text]
when text = @ss.scan(/:\w+/)
[:SYMBOL, text]
when text = @ss.scan(/[\w%-]+/)
[:LITERAL, text]
# any char
when text = @ss.scan(/./)
[:LITERAL, text]
end
end
end
end
Version data entries
18 entries across 18 versions & 2 rubygems