= LangScan - program analyzer for source code search engine

== Requirement

* Ruby 1.8
* flex 2.5.31 (flex 2.5.4 doesn't work)

== Examples

=== Example1
  % cat -n hello.c
       1  #include <stdio.h>
       2
       3  int main(int argc, char **argv)
       4  {
       5    printf("Hello World.\n");
       6    return 0;
       7  }
  % ruby -rlangscan/c -e 'LangScan::C.scan(ARGF.readlines.join) {|f| p f}' < hello.c
  #<LangScan::Fragment space " " 1 (8)>
  #<LangScan::Fragment ident "stdio" 1 (10)>
  #<LangScan::Fragment punct "." 1 (15)>
  #<LangScan::Fragment space "\n" 2 (19)>
  #<LangScan::Fragment space " " 3 (23)>
  #<LangScan::Fragment preproc_beg "#" 1 (0)>
  #<LangScan::Fragment ident "include" 1 (1)>
  ...

=== Example2
  % cat -n display_fundef.rb
     1  require 'langscan'
     2
     3  # display all function definitions.
     4  ARGV.each {|arg|
     5    next unless scanner = LangScan.choose(arg)
     6    scanner.scan(File.open(arg).readlines.join) {|f|
     7      if f.type == :fundef
     8        puts f.text
     9      end
    10    }
    11  }
  % ruby display_fundef.rb hello.c
  main

== Authors
See `AUTHORS'
