From: Petr Kovar <redmine@...>
Date: 2010-04-15T23:52:23+09:00
Subject: [ruby-core:29533] [Bug #3152] StringScanner is failing with symbols like # or {

Bug #3152: StringScanner is failing with symbols like # or {
http://redmine.ruby-lang.org/issues/show/3152

Author: Petr Kovar
Status: Open, Priority: Normal
ruby -v: all versions

StringScanner has problems with symbols like # or { in the middle of a text.
If a string starts with the symbols, it's ok.
Function scan_until, however, works well. Problematic functions are
scan and scan_full.

Example:

require 'strscan'

s1 = StringScanner.new('#{expr} blah blah')
s2 = StringScanner.new('blah blah #{expr} blah blah')
reg = /#\{/

puts "s1 failed" unless s1.scan(reg) # should be ok
puts "s2 failed" unless s2.scan(reg) # is failing


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