contrib/pep8analysis/src/ast/ast_base.nit

   1 import backbone
   2 import parser
   3
   4 redef class AnalysisManager
   5         fun build_ast_from_file( filename : String ) : nullable AListing
   6         do
   7                 var file = new IFStream.open( filename )
   8                 return build_ast(filename, file)
   9         end
  10
  11         fun build_ast(filename: String, stream: IStream): nullable AListing
  12         do
  13                 var source = new SourceFile(filename, stream)
  14                 var lexer = new Lexer(source)
  15                 var parser = new Parser(lexer)
  16                 var node_tree = parser.parse
  17
  18                 var ast = node_tree.n_base
  19                 if ast == null then
  20                         var err = node_tree.n_eof
  21                         assert err isa AError
  22                         print "error at {err.location}: {err.message}"
  23                         return null
  24                 end
  25
  26                 return ast
  27         end
  28 end