src/syntax/syntax.nit

   1 # This file is part of NIT ( http://www.nitlanguage.org ).
   2 #
   3 # Copyright 2008 Jean Privat <jean@pryen.org>
   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 # Full syntax analysis of NIT AST.
  18 # Detect syntax and some metamodel errors.
  19 package syntax
  20
  21 import mmloader
  22 import mmbuilder
  23 import typing
  24
  25 # Loader of nit source files
  26 class SrcModuleLoader
  27 special ModuleLoader
  28         redef type MODULE: MMSrcModule
  29
  30         redef fun file_type do return "nit"
  31
  32         redef fun parse_file(context, file, filename, name, dir)
  33         do
  34                 var lexer = new Lexer(file, filename)
  35                 var parser = new Parser(lexer)
  36                 var node_tree = parser.parse
  37                 if node_tree.n_base == null then
  38                         var err = node_tree.n_eof
  39                         assert err isa PError
  40                         context.error("{err.locate}: {err.message}")
  41                         exit(1)
  42                 end
  43                 var node_module = node_tree.n_base
  44                 assert node_module isa AModule
  45                 var module = new MMSrcModule(context, node_module, dir, name, filename)
  46                 return module
  47         end
  48
  49         redef fun process_metamodel(context, module)
  50         do
  51                 module.process_supermodules(context)
  52                 module.process_syntax(context)
  53         end
  54
  55         init do end
  56 end
  57
  58 redef class MMSrcModule
  59         # Loading and syntax analysis of super modules
  60         private fun process_supermodules(tc: ToolContext)
  61         do
  62                 node.import_super_modules(tc, self)
  63         end
  64
  65         # Syntax analysis and MM construction for the module
  66         # Require than supermodules are processed
  67         private fun process_syntax(tc: ToolContext)
  68         do
  69                 do_mmbuilder(tc)
  70                 if tc.error_count > 0 then exit(1)
  71
  72                 do_typing(tc)
  73                 if tc.error_count > 0 then exit(1)
  74         end
  75 end
  76