src/analysis/instantiated_type_analysis.nit

   1 # This file is part of NIT ( http://www.nitlanguage.org ).
   2 #
   3 # Copyright 2009 Jean-Sebastien Gelinas <calestar@gmail.com>
   4 #
   5 # Licensed under the Apache License, Version 2.0 (the "License");
   6 # you may not use this file except in compliance with the License.
   7 # You may obtain a copy of the License at
   8 #
   9 #        http://www.apache.org/licenses/LICENSE-2.0
  10 #
  11 # Unless required by applicable law or agreed to in writing, software
  12 # distributed under the License is distributed on an "AS IS" BASIS,
  13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 # See the License for the specific language governing permissions and
  15 # limitations under the License.
  16
  17 # Module containing all bases for instantiated type analysis
  18 package instantiated_type_analysis
  19
  20 import program
  21
  22 redef class Program
  23         # This attribute is the InstantiatedTypeAnalysis results
  24         readable writable var _ita: nullable InstantiatedTypeAnalysis = null
  25
  26         # This method will create a file and output the name of all types that are instantiated in it
  27         fun dump_instantiated_types(directory_name: String) do
  28                 var f = new OFStream.open("{directory_name}/{main_module.name}.instantiated_types.log")
  29                 with_each_live_local_classes !action(c) do
  30                         f.write("{c}\n")
  31                 end
  32                 f.close
  33         end
  34
  35         # This method will create a file and output the names of all types that are not instantiated in it
  36         fun dump_not_instantiated_types(directory_name: String) do
  37                 var f = new OFStream.open("{directory_name}/{main_module.name}.not_instantiated_types.log")
  38                 # Must overwrite 'with_each_local_classes' since we are looking at non-instantiated classes
  39                 for c in main_module.local_classes do
  40                         if not ita.is_class_instantiated(c) then
  41                                 f.write("{c}\n")
  42                         end
  43                 end
  44                 f.close
  45         end
  46
  47         # We know which are really live, use that information !
  48         redef fun with_each_live_local_classes
  49                 !action(m: MMLocalClass)
  50         do
  51                 for c in main_module.local_classes do
  52                         if ita == null or ita.as(not null).is_class_instantiated(c) then action(c)
  53                 end
  54         end
  55 end
  56
  57 # Subclasses of this class would represent an analysis that produces
  58 # at least a way of knowing if a class is instantiated somewhere in a
  59 # method that is reachable from the entry point of the program
  60 class InstantiatedTypeAnalysis
  61         fun is_class_instantiated(local_class: MMLocalClass): Bool is abstract
  62 end
  63
  64 # Default behavior is to say that all types are instantiated
  65 class DefaultInstantiatedTypeAnalysis
  66 special InstantiatedTypeAnalysis
  67         redef fun is_class_instantiated(local_class: MMLocalClass): Bool do return true
  68
  69         init do end
  70 end