1 # This file is part of NIT ( http://www.nitlanguage.org ).
3 # Copyright 2012 Jean Privat <jean@pryen.org>
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
9 # http://www.apache.org/licenses/LICENSE-2.0
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.
17 # A naive Nit interpreter
21 import frontend
::code_gen
25 # Create a tool context to handle options and paths
26 var toolcontext
= new ToolContext
27 toolcontext
.option_context
.options_before_rest
= true
28 toolcontext
.tooldescription
= "Usage: nit [OPTION]... <file.nit>...\nInterprets and debugs Nit programs."
29 # Add an option "-o" to enable compatibility with the tests.sh script
30 var opt
= new OptionString("Does nothing. Used for compatibility.", "-o")
32 toolcontext
.option_context
.add_option
(opt
)
33 var opt_eval
= new OptionBool("Specifies the program from command-line", "-e")
34 var opt_loop
= new OptionBool("Repeatedly run the program for each line in file-name arguments", "-n")
35 var opt_vm
= new OptionBool("Run the virtual machine instead of the naive interpreter (experimental)", "--vm")
36 toolcontext
.option_context
.add_option
(opt_eval
, opt_loop
, opt_vm
)
37 # We do not add other options, so process them now!
38 toolcontext
.process_options
(args
)
40 # We need a model to collect stufs
42 # An a model builder to parse files
43 var modelbuilder
= new ModelBuilder(model
, toolcontext
)
45 var arguments
= toolcontext
.option_context
.rest
46 var progname
= arguments
.first
48 # Here we load an process all modules passed on the command line
49 var mmodules
: Array[MModule]
51 if opt_eval
.value
then
52 var amodule
= toolcontext
.parse_module
(progname
)
53 toolcontext
.check_errors
56 if opt_loop
.value
then
57 parent
= modelbuilder
.get_mmodule_by_name
(null, null, "niti_runtime")
58 if parent
== null then
59 toolcontext
.check_errors
64 modelbuilder
.load_rt_module
(parent
, amodule
, "-")
66 mmodules
= [amodule
.mmodule
.as(not null)]
67 else if progname
== "-" then
68 var content
= stdin
.read_all
69 var amodule
= toolcontext
.parse_module
(content
)
70 toolcontext
.check_errors
71 modelbuilder
.load_rt_module
(null, amodule
, "-")
72 mmodules
= [amodule
.mmodule
.as(not null)]
74 mmodules
= modelbuilder
.parse
([progname
])
77 modelbuilder
.run_phases
79 if toolcontext
.opt_only_metamodel
.value
then toolcontext
.quit
81 var mainmodule
= toolcontext
.make_main_module
(mmodules
)
83 var self_mm
= mainmodule
84 var self_args
= arguments
87 modelbuilder
.run_virtual_machine
(self_mm
, self_args
)
89 modelbuilder
.run_naive_interpreter
(self_mm
, self_args
)