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Contents
module Hobo::Dryml::Parser
# A REXML source that keeps track of where in the buffer it is
class Source < REXML::Source
def initialize(src)
super(src)
@buffer_offset = 0
end
attr_reader :last_match_offset
def remember_match(m)
if m
@last_match = m
@last_match_offset = @buffer_offset + m.begin(0)
@orig[@last_match_offset..@last_match_offset+m[0].length] == @buffer[m.begin(0)..m.end(0)]
end
m
end
def advance_buffer(md)
@buffer = md.post_match
@buffer_offset += md.end(0)
end
def scan(pattern, cons=false)
raise '!'
return nil if @buffer.nil?
rv = @buffer.scan(pattern)
if cons and rv.size > 0
advance_buffer(Regexp.last_match)
end
rv
end
def consume(pattern)
md = remember_match(pattern.match(@buffer))
if md
advance_buffer(md)
@buffer
end
end
def match(pattern, cons=false)
md = remember_match(pattern.match(@buffer))
advance_buffer(md) if cons and md
return md
end
def current_line
pos = last_match_offset || 0
[0, 0, @orig[0..pos].count("\n") + 1]
end
end
end
Version data entries
23 entries across 23 versions & 1 rubygems